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1 | /* | |
2 | * hostapd / Callback functions for driver wrappers | |
3 | * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> | |
4 | * | |
5 | * This software may be distributed under the terms of the BSD license. | |
6 | * See README for more details. | |
7 | */ | |
8 | ||
9 | #include "utils/includes.h" | |
10 | ||
11 | #include "utils/common.h" | |
12 | #include "radius/radius.h" | |
13 | #include "drivers/driver.h" | |
14 | #include "common/ieee802_11_defs.h" | |
15 | #include "common/ieee802_11_common.h" | |
16 | #include "crypto/random.h" | |
17 | #include "p2p/p2p.h" | |
18 | #include "wps/wps.h" | |
19 | #include "wnm_ap.h" | |
20 | #include "hostapd.h" | |
21 | #include "ieee802_11.h" | |
22 | #include "sta_info.h" | |
23 | #include "accounting.h" | |
24 | #include "tkip_countermeasures.h" | |
25 | #include "ieee802_1x.h" | |
26 | #include "wpa_auth.h" | |
27 | #include "wps_hostapd.h" | |
28 | #include "ap_drv_ops.h" | |
29 | #include "ap_config.h" | |
30 | #include "hw_features.h" | |
31 | ||
32 | ||
33 | int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr, | |
34 | const u8 *req_ies, size_t req_ies_len, int reassoc) | |
35 | { | |
36 | struct sta_info *sta; | |
37 | int new_assoc, res; | |
38 | struct ieee802_11_elems elems; | |
39 | const u8 *ie; | |
40 | size_t ielen; | |
41 | #ifdef CONFIG_IEEE80211R | |
42 | u8 buf[sizeof(struct ieee80211_mgmt) + 1024]; | |
43 | u8 *p = buf; | |
44 | #endif /* CONFIG_IEEE80211R */ | |
45 | u16 reason = WLAN_REASON_UNSPECIFIED; | |
46 | u16 status = WLAN_STATUS_SUCCESS; | |
47 | ||
48 | if (addr == NULL) { | |
49 | /* | |
50 | * This could potentially happen with unexpected event from the | |
51 | * driver wrapper. This was seen at least in one case where the | |
52 | * driver ended up being set to station mode while hostapd was | |
53 | * running, so better make sure we stop processing such an | |
54 | * event here. | |
55 | */ | |
56 | wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with " | |
57 | "no address"); | |
58 | return -1; | |
59 | } | |
60 | random_add_randomness(addr, ETH_ALEN); | |
61 | ||
62 | hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211, | |
63 | HOSTAPD_LEVEL_INFO, "associated"); | |
64 | ||
65 | ieee802_11_parse_elems(req_ies, req_ies_len, &elems, 0); | |
66 | if (elems.wps_ie) { | |
67 | ie = elems.wps_ie - 2; | |
68 | ielen = elems.wps_ie_len + 2; | |
69 | wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq"); | |
70 | } else if (elems.rsn_ie) { | |
71 | ie = elems.rsn_ie - 2; | |
72 | ielen = elems.rsn_ie_len + 2; | |
73 | wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq"); | |
74 | } else if (elems.wpa_ie) { | |
75 | ie = elems.wpa_ie - 2; | |
76 | ielen = elems.wpa_ie_len + 2; | |
77 | wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq"); | |
78 | } else { | |
79 | ie = NULL; | |
80 | ielen = 0; | |
81 | wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in " | |
82 | "(Re)AssocReq"); | |
83 | } | |
84 | ||
85 | sta = ap_get_sta(hapd, addr); | |
86 | if (sta) { | |
87 | accounting_sta_stop(hapd, sta); | |
88 | ||
89 | /* | |
90 | * Make sure that the previously registered inactivity timer | |
91 | * will not remove the STA immediately. | |
92 | */ | |
93 | sta->timeout_next = STA_NULLFUNC; | |
94 | } else { | |
95 | sta = ap_sta_add(hapd, addr); | |
96 | if (sta == NULL) { | |
97 | hostapd_drv_sta_disassoc(hapd, addr, | |
98 | WLAN_REASON_DISASSOC_AP_BUSY); | |
99 | return -1; | |
100 | } | |
101 | } | |
102 | sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS | WLAN_STA_WPS2); | |
103 | ||
104 | #ifdef CONFIG_P2P | |
105 | if (elems.p2p) { | |
106 | wpabuf_free(sta->p2p_ie); | |
107 | sta->p2p_ie = ieee802_11_vendor_ie_concat(req_ies, req_ies_len, | |
108 | P2P_IE_VENDOR_TYPE); | |
109 | } | |
110 | #endif /* CONFIG_P2P */ | |
111 | ||
112 | #ifdef CONFIG_HS20 | |
113 | wpabuf_free(sta->hs20_ie); | |
114 | if (elems.hs20 && elems.hs20_len > 4) { | |
115 | sta->hs20_ie = wpabuf_alloc_copy(elems.hs20 + 4, | |
116 | elems.hs20_len - 4); | |
117 | } else | |
118 | sta->hs20_ie = NULL; | |
119 | #endif /* CONFIG_HS20 */ | |
120 | ||
121 | if (hapd->conf->wpa) { | |
122 | if (ie == NULL || ielen == 0) { | |
123 | #ifdef CONFIG_WPS | |
124 | if (hapd->conf->wps_state) { | |
125 | wpa_printf(MSG_DEBUG, "STA did not include " | |
126 | "WPA/RSN IE in (Re)Association " | |
127 | "Request - possible WPS use"); | |
128 | sta->flags |= WLAN_STA_MAYBE_WPS; | |
129 | goto skip_wpa_check; | |
130 | } | |
131 | #endif /* CONFIG_WPS */ | |
132 | ||
133 | wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA"); | |
134 | return -1; | |
135 | } | |
136 | #ifdef CONFIG_WPS | |
137 | if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 && | |
138 | os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) { | |
139 | struct wpabuf *wps; | |
140 | sta->flags |= WLAN_STA_WPS; | |
141 | wps = ieee802_11_vendor_ie_concat(ie, ielen, | |
142 | WPS_IE_VENDOR_TYPE); | |
143 | if (wps) { | |
144 | if (wps_is_20(wps)) { | |
145 | wpa_printf(MSG_DEBUG, "WPS: STA " | |
146 | "supports WPS 2.0"); | |
147 | sta->flags |= WLAN_STA_WPS2; | |
148 | } | |
149 | wpabuf_free(wps); | |
150 | } | |
151 | goto skip_wpa_check; | |
152 | } | |
153 | #endif /* CONFIG_WPS */ | |
154 | ||
155 | if (sta->wpa_sm == NULL) | |
156 | sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, | |
157 | sta->addr); | |
158 | if (sta->wpa_sm == NULL) { | |
159 | wpa_printf(MSG_ERROR, "Failed to initialize WPA state " | |
160 | "machine"); | |
161 | return -1; | |
162 | } | |
163 | res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, | |
164 | ie, ielen, | |
165 | elems.mdie, elems.mdie_len); | |
166 | if (res != WPA_IE_OK) { | |
167 | wpa_printf(MSG_DEBUG, "WPA/RSN information element " | |
168 | "rejected? (res %u)", res); | |
169 | wpa_hexdump(MSG_DEBUG, "IE", ie, ielen); | |
170 | if (res == WPA_INVALID_GROUP) { | |
171 | reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID; | |
172 | status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; | |
173 | } else if (res == WPA_INVALID_PAIRWISE) { | |
174 | reason = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID; | |
175 | status = WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID; | |
176 | } else if (res == WPA_INVALID_AKMP) { | |
177 | reason = WLAN_REASON_AKMP_NOT_VALID; | |
178 | status = WLAN_STATUS_AKMP_NOT_VALID; | |
179 | } | |
180 | #ifdef CONFIG_IEEE80211W | |
181 | else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION) { | |
182 | reason = WLAN_REASON_INVALID_IE; | |
183 | status = WLAN_STATUS_INVALID_IE; | |
184 | } else if (res == WPA_INVALID_MGMT_GROUP_CIPHER) { | |
185 | reason = WLAN_REASON_GROUP_CIPHER_NOT_VALID; | |
186 | status = WLAN_STATUS_GROUP_CIPHER_NOT_VALID; | |
187 | } | |
188 | #endif /* CONFIG_IEEE80211W */ | |
189 | else { | |
190 | reason = WLAN_REASON_INVALID_IE; | |
191 | status = WLAN_STATUS_INVALID_IE; | |
192 | } | |
193 | goto fail; | |
194 | } | |
195 | #ifdef CONFIG_IEEE80211W | |
196 | if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && | |
197 | sta->sa_query_count > 0) | |
198 | ap_check_sa_query_timeout(hapd, sta); | |
199 | if ((sta->flags & WLAN_STA_MFP) && !sta->sa_query_timed_out && | |
200 | (sta->auth_alg != WLAN_AUTH_FT)) { | |
201 | /* | |
202 | * STA has already been associated with MFP and SA | |
203 | * Query timeout has not been reached. Reject the | |
204 | * association attempt temporarily and start SA Query, | |
205 | * if one is not pending. | |
206 | */ | |
207 | ||
208 | if (sta->sa_query_count == 0) | |
209 | ap_sta_start_sa_query(hapd, sta); | |
210 | ||
211 | #ifdef CONFIG_IEEE80211R | |
212 | status = WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY; | |
213 | ||
214 | p = hostapd_eid_assoc_comeback_time(hapd, sta, p); | |
215 | ||
216 | hostapd_sta_assoc(hapd, addr, reassoc, status, buf, | |
217 | p - buf); | |
218 | #endif /* CONFIG_IEEE80211R */ | |
219 | return 0; | |
220 | } | |
221 | ||
222 | if (wpa_auth_uses_mfp(sta->wpa_sm)) | |
223 | sta->flags |= WLAN_STA_MFP; | |
224 | else | |
225 | sta->flags &= ~WLAN_STA_MFP; | |
226 | #endif /* CONFIG_IEEE80211W */ | |
227 | ||
228 | #ifdef CONFIG_IEEE80211R | |
229 | if (sta->auth_alg == WLAN_AUTH_FT) { | |
230 | status = wpa_ft_validate_reassoc(sta->wpa_sm, req_ies, | |
231 | req_ies_len); | |
232 | if (status != WLAN_STATUS_SUCCESS) { | |
233 | if (status == WLAN_STATUS_INVALID_PMKID) | |
234 | reason = WLAN_REASON_INVALID_IE; | |
235 | if (status == WLAN_STATUS_INVALID_MDIE) | |
236 | reason = WLAN_REASON_INVALID_IE; | |
237 | if (status == WLAN_STATUS_INVALID_FTIE) | |
238 | reason = WLAN_REASON_INVALID_IE; | |
239 | goto fail; | |
240 | } | |
241 | } | |
242 | #endif /* CONFIG_IEEE80211R */ | |
243 | } else if (hapd->conf->wps_state) { | |
244 | #ifdef CONFIG_WPS | |
245 | struct wpabuf *wps; | |
246 | if (req_ies) | |
247 | wps = ieee802_11_vendor_ie_concat(req_ies, req_ies_len, | |
248 | WPS_IE_VENDOR_TYPE); | |
249 | else | |
250 | wps = NULL; | |
251 | #ifdef CONFIG_WPS_STRICT | |
252 | if (wps && wps_validate_assoc_req(wps) < 0) { | |
253 | reason = WLAN_REASON_INVALID_IE; | |
254 | status = WLAN_STATUS_INVALID_IE; | |
255 | wpabuf_free(wps); | |
256 | goto fail; | |
257 | } | |
258 | #endif /* CONFIG_WPS_STRICT */ | |
259 | if (wps) { | |
260 | sta->flags |= WLAN_STA_WPS; | |
261 | if (wps_is_20(wps)) { | |
262 | wpa_printf(MSG_DEBUG, "WPS: STA supports " | |
263 | "WPS 2.0"); | |
264 | sta->flags |= WLAN_STA_WPS2; | |
265 | } | |
266 | } else | |
267 | sta->flags |= WLAN_STA_MAYBE_WPS; | |
268 | wpabuf_free(wps); | |
269 | #endif /* CONFIG_WPS */ | |
270 | } | |
271 | #ifdef CONFIG_WPS | |
272 | skip_wpa_check: | |
273 | #endif /* CONFIG_WPS */ | |
274 | ||
275 | #ifdef CONFIG_IEEE80211R | |
276 | p = wpa_sm_write_assoc_resp_ies(sta->wpa_sm, buf, sizeof(buf), | |
277 | sta->auth_alg, req_ies, req_ies_len); | |
278 | ||
279 | hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf); | |
280 | #else /* CONFIG_IEEE80211R */ | |
281 | /* Keep compiler silent about unused variables */ | |
282 | if (status) { | |
283 | } | |
284 | #endif /* CONFIG_IEEE80211R */ | |
285 | ||
286 | new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0; | |
287 | sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC; | |
288 | ||
289 | if (reassoc && (sta->auth_alg == WLAN_AUTH_FT)) | |
290 | wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC_FT); | |
291 | else | |
292 | wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC); | |
293 | ||
294 | hostapd_new_assoc_sta(hapd, sta, !new_assoc); | |
295 | ||
296 | ieee802_1x_notify_port_enabled(sta->eapol_sm, 1); | |
297 | ||
298 | #ifdef CONFIG_P2P | |
299 | if (req_ies) { | |
300 | p2p_group_notif_assoc(hapd->p2p_group, sta->addr, | |
301 | req_ies, req_ies_len); | |
302 | } | |
303 | #endif /* CONFIG_P2P */ | |
304 | ||
305 | return 0; | |
306 | ||
307 | fail: | |
308 | #ifdef CONFIG_IEEE80211R | |
309 | hostapd_sta_assoc(hapd, addr, reassoc, status, buf, p - buf); | |
310 | #endif /* CONFIG_IEEE80211R */ | |
311 | hostapd_drv_sta_disassoc(hapd, sta->addr, reason); | |
312 | ap_free_sta(hapd, sta); | |
313 | return -1; | |
314 | } | |
315 | ||
316 | ||
317 | void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr) | |
318 | { | |
319 | struct sta_info *sta; | |
320 | ||
321 | if (addr == NULL) { | |
322 | /* | |
323 | * This could potentially happen with unexpected event from the | |
324 | * driver wrapper. This was seen at least in one case where the | |
325 | * driver ended up reporting a station mode event while hostapd | |
326 | * was running, so better make sure we stop processing such an | |
327 | * event here. | |
328 | */ | |
329 | wpa_printf(MSG_DEBUG, "hostapd_notif_disassoc: Skip event " | |
330 | "with no address"); | |
331 | return; | |
332 | } | |
333 | ||
334 | hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211, | |
335 | HOSTAPD_LEVEL_INFO, "disassociated"); | |
336 | ||
337 | sta = ap_get_sta(hapd, addr); | |
338 | if (sta == NULL) { | |
339 | wpa_printf(MSG_DEBUG, "Disassociation notification for " | |
340 | "unknown STA " MACSTR, MAC2STR(addr)); | |
341 | return; | |
342 | } | |
343 | ||
344 | ap_sta_set_authorized(hapd, sta, 0); | |
345 | sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC); | |
346 | wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC); | |
347 | sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST; | |
348 | ieee802_1x_notify_port_enabled(sta->eapol_sm, 0); | |
349 | ap_free_sta(hapd, sta); | |
350 | } | |
351 | ||
352 | ||
353 | void hostapd_event_sta_low_ack(struct hostapd_data *hapd, const u8 *addr) | |
354 | { | |
355 | struct sta_info *sta = ap_get_sta(hapd, addr); | |
356 | ||
357 | if (!sta || !hapd->conf->disassoc_low_ack) | |
358 | return; | |
359 | ||
360 | hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211, | |
361 | HOSTAPD_LEVEL_INFO, "disconnected due to excessive " | |
362 | "missing ACKs"); | |
363 | hostapd_drv_sta_disassoc(hapd, addr, WLAN_REASON_DISASSOC_LOW_ACK); | |
364 | if (sta) | |
365 | ap_sta_disassociate(hapd, sta, WLAN_REASON_DISASSOC_LOW_ACK); | |
366 | } | |
367 | ||
368 | ||
369 | void hostapd_event_ch_switch(struct hostapd_data *hapd, int freq, int ht, | |
370 | int offset) | |
371 | { | |
372 | #ifdef NEED_AP_MLME | |
373 | int channel; | |
374 | ||
375 | hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211, | |
376 | HOSTAPD_LEVEL_INFO, "driver had channel switch: " | |
377 | "freq=%d, ht=%d, offset=%d", freq, ht, offset); | |
378 | ||
379 | hapd->iface->freq = freq; | |
380 | ||
381 | channel = hostapd_hw_get_channel(hapd, freq); | |
382 | if (!channel) { | |
383 | hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211, | |
384 | HOSTAPD_LEVEL_WARNING, "driver switched to " | |
385 | "bad channel!"); | |
386 | return; | |
387 | } | |
388 | ||
389 | hapd->iconf->channel = channel; | |
390 | hapd->iconf->ieee80211n = ht; | |
391 | hapd->iconf->secondary_channel = offset; | |
392 | #endif /* NEED_AP_MLME */ | |
393 | } | |
394 | ||
395 | ||
396 | int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa, const u8 *da, | |
397 | const u8 *bssid, const u8 *ie, size_t ie_len, | |
398 | int ssi_signal) | |
399 | { | |
400 | size_t i; | |
401 | int ret = 0; | |
402 | ||
403 | if (sa == NULL || ie == NULL) | |
404 | return -1; | |
405 | ||
406 | random_add_randomness(sa, ETH_ALEN); | |
407 | for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) { | |
408 | if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx, | |
409 | sa, da, bssid, ie, ie_len, | |
410 | ssi_signal) > 0) { | |
411 | ret = 1; | |
412 | break; | |
413 | } | |
414 | } | |
415 | return ret; | |
416 | } | |
417 | ||
418 | ||
419 | #ifdef HOSTAPD | |
420 | ||
421 | #ifdef CONFIG_IEEE80211R | |
422 | static void hostapd_notify_auth_ft_finish(void *ctx, const u8 *dst, | |
423 | const u8 *bssid, | |
424 | u16 auth_transaction, u16 status, | |
425 | const u8 *ies, size_t ies_len) | |
426 | { | |
427 | struct hostapd_data *hapd = ctx; | |
428 | struct sta_info *sta; | |
429 | ||
430 | sta = ap_get_sta(hapd, dst); | |
431 | if (sta == NULL) | |
432 | return; | |
433 | ||
434 | hostapd_logger(hapd, dst, HOSTAPD_MODULE_IEEE80211, | |
435 | HOSTAPD_LEVEL_DEBUG, "authentication OK (FT)"); | |
436 | sta->flags |= WLAN_STA_AUTH; | |
437 | ||
438 | hostapd_sta_auth(hapd, dst, auth_transaction, status, ies, ies_len); | |
439 | } | |
440 | #endif /* CONFIG_IEEE80211R */ | |
441 | ||
442 | ||
443 | static void hostapd_notif_auth(struct hostapd_data *hapd, | |
444 | struct auth_info *rx_auth) | |
445 | { | |
446 | struct sta_info *sta; | |
447 | u16 status = WLAN_STATUS_SUCCESS; | |
448 | u8 resp_ies[2 + WLAN_AUTH_CHALLENGE_LEN]; | |
449 | size_t resp_ies_len = 0; | |
450 | ||
451 | sta = ap_get_sta(hapd, rx_auth->peer); | |
452 | if (!sta) { | |
453 | sta = ap_sta_add(hapd, rx_auth->peer); | |
454 | if (sta == NULL) { | |
455 | status = WLAN_STATUS_UNSPECIFIED_FAILURE; | |
456 | goto fail; | |
457 | } | |
458 | } | |
459 | sta->flags &= ~WLAN_STA_PREAUTH; | |
460 | ieee802_1x_notify_pre_auth(sta->eapol_sm, 0); | |
461 | #ifdef CONFIG_IEEE80211R | |
462 | if (rx_auth->auth_type == WLAN_AUTH_FT && hapd->wpa_auth) { | |
463 | sta->auth_alg = WLAN_AUTH_FT; | |
464 | if (sta->wpa_sm == NULL) | |
465 | sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, | |
466 | sta->addr); | |
467 | if (sta->wpa_sm == NULL) { | |
468 | wpa_printf(MSG_DEBUG, "FT: Failed to initialize WPA " | |
469 | "state machine"); | |
470 | status = WLAN_STATUS_UNSPECIFIED_FAILURE; | |
471 | goto fail; | |
472 | } | |
473 | wpa_ft_process_auth(sta->wpa_sm, rx_auth->bssid, | |
474 | rx_auth->auth_transaction, rx_auth->ies, | |
475 | rx_auth->ies_len, | |
476 | hostapd_notify_auth_ft_finish, hapd); | |
477 | return; | |
478 | } | |
479 | #endif /* CONFIG_IEEE80211R */ | |
480 | fail: | |
481 | hostapd_sta_auth(hapd, rx_auth->peer, rx_auth->auth_transaction + 1, | |
482 | status, resp_ies, resp_ies_len); | |
483 | } | |
484 | ||
485 | ||
486 | static void hostapd_action_rx(struct hostapd_data *hapd, | |
487 | struct rx_action *action) | |
488 | { | |
489 | struct sta_info *sta; | |
490 | ||
491 | wpa_printf(MSG_DEBUG, "RX_ACTION cat %d action plen %d", | |
492 | action->category, (int) action->len); | |
493 | ||
494 | sta = ap_get_sta(hapd, action->sa); | |
495 | if (sta == NULL) { | |
496 | wpa_printf(MSG_DEBUG, "%s: station not found", __func__); | |
497 | return; | |
498 | } | |
499 | #ifdef CONFIG_IEEE80211R | |
500 | if (action->category == WLAN_ACTION_FT) { | |
501 | wpa_printf(MSG_DEBUG, "%s: FT_ACTION length %d", | |
502 | __func__, (int) action->len); | |
503 | wpa_ft_action_rx(sta->wpa_sm, action->data, action->len); | |
504 | } | |
505 | #endif /* CONFIG_IEEE80211R */ | |
506 | #ifdef CONFIG_IEEE80211W | |
507 | if (action->category == WLAN_ACTION_SA_QUERY && action->len >= 4) { | |
508 | wpa_printf(MSG_DEBUG, "%s: SA_QUERY_ACTION length %d", | |
509 | __func__, (int) action->len); | |
510 | ieee802_11_sa_query_action(hapd, action->sa, | |
511 | *(action->data + 1), | |
512 | action->data + 2); | |
513 | } | |
514 | #endif /* CONFIG_IEEE80211W */ | |
515 | #ifdef CONFIG_WNM | |
516 | if (action->category == WLAN_ACTION_WNM) { | |
517 | wpa_printf(MSG_DEBUG, "%s: WNM_ACTION length %d", | |
518 | __func__, (int) action->len); | |
519 | ieee802_11_rx_wnm_action_ap(hapd, action); | |
520 | } | |
521 | #endif /* CONFIG_WNM */ | |
522 | } | |
523 | ||
524 | ||
525 | #ifdef NEED_AP_MLME | |
526 | ||
527 | #define HAPD_BROADCAST ((struct hostapd_data *) -1) | |
528 | ||
529 | static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface, | |
530 | const u8 *bssid) | |
531 | { | |
532 | size_t i; | |
533 | ||
534 | if (bssid == NULL) | |
535 | return NULL; | |
536 | if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff && | |
537 | bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff) | |
538 | return HAPD_BROADCAST; | |
539 | ||
540 | for (i = 0; i < iface->num_bss; i++) { | |
541 | if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) | |
542 | return iface->bss[i]; | |
543 | } | |
544 | ||
545 | return NULL; | |
546 | } | |
547 | ||
548 | ||
549 | static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd, | |
550 | const u8 *bssid, const u8 *addr, | |
551 | int wds) | |
552 | { | |
553 | hapd = get_hapd_bssid(hapd->iface, bssid); | |
554 | if (hapd == NULL || hapd == HAPD_BROADCAST) | |
555 | return; | |
556 | ||
557 | ieee802_11_rx_from_unknown(hapd, addr, wds); | |
558 | } | |
559 | ||
560 | ||
561 | static void hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt) | |
562 | { | |
563 | struct hostapd_iface *iface = hapd->iface; | |
564 | const struct ieee80211_hdr *hdr; | |
565 | const u8 *bssid; | |
566 | struct hostapd_frame_info fi; | |
567 | ||
568 | hdr = (const struct ieee80211_hdr *) rx_mgmt->frame; | |
569 | bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len); | |
570 | if (bssid == NULL) | |
571 | return; | |
572 | ||
573 | hapd = get_hapd_bssid(iface, bssid); | |
574 | if (hapd == NULL) { | |
575 | u16 fc; | |
576 | fc = le_to_host16(hdr->frame_control); | |
577 | ||
578 | /* | |
579 | * Drop frames to unknown BSSIDs except for Beacon frames which | |
580 | * could be used to update neighbor information. | |
581 | */ | |
582 | if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT && | |
583 | WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON) | |
584 | hapd = iface->bss[0]; | |
585 | else | |
586 | return; | |
587 | } | |
588 | ||
589 | os_memset(&fi, 0, sizeof(fi)); | |
590 | fi.datarate = rx_mgmt->datarate; | |
591 | fi.ssi_signal = rx_mgmt->ssi_signal; | |
592 | ||
593 | if (hapd == HAPD_BROADCAST) { | |
594 | size_t i; | |
595 | for (i = 0; i < iface->num_bss; i++) | |
596 | ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame, | |
597 | rx_mgmt->frame_len, &fi); | |
598 | } else | |
599 | ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi); | |
600 | ||
601 | random_add_randomness(&fi, sizeof(fi)); | |
602 | } | |
603 | ||
604 | ||
605 | static void hostapd_rx_action(struct hostapd_data *hapd, | |
606 | struct rx_action *rx_action) | |
607 | { | |
608 | struct rx_mgmt rx_mgmt; | |
609 | u8 *buf; | |
610 | struct ieee80211_hdr *hdr; | |
611 | ||
612 | wpa_printf(MSG_DEBUG, "EVENT_RX_ACTION DA=" MACSTR " SA=" MACSTR | |
613 | " BSSID=" MACSTR " category=%u", | |
614 | MAC2STR(rx_action->da), MAC2STR(rx_action->sa), | |
615 | MAC2STR(rx_action->bssid), rx_action->category); | |
616 | wpa_hexdump(MSG_MSGDUMP, "Received action frame contents", | |
617 | rx_action->data, rx_action->len); | |
618 | ||
619 | buf = os_zalloc(24 + 1 + rx_action->len); | |
620 | if (buf == NULL) | |
621 | return; | |
622 | hdr = (struct ieee80211_hdr *) buf; | |
623 | hdr->frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT, | |
624 | WLAN_FC_STYPE_ACTION); | |
625 | if (rx_action->category == WLAN_ACTION_SA_QUERY) { | |
626 | /* | |
627 | * Assume frame was protected; it would have been dropped if | |
628 | * not. | |
629 | */ | |
630 | hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP); | |
631 | } | |
632 | os_memcpy(hdr->addr1, rx_action->da, ETH_ALEN); | |
633 | os_memcpy(hdr->addr2, rx_action->sa, ETH_ALEN); | |
634 | os_memcpy(hdr->addr3, rx_action->bssid, ETH_ALEN); | |
635 | buf[24] = rx_action->category; | |
636 | os_memcpy(buf + 24 + 1, rx_action->data, rx_action->len); | |
637 | os_memset(&rx_mgmt, 0, sizeof(rx_mgmt)); | |
638 | rx_mgmt.frame = buf; | |
639 | rx_mgmt.frame_len = 24 + 1 + rx_action->len; | |
640 | hostapd_mgmt_rx(hapd, &rx_mgmt); | |
641 | os_free(buf); | |
642 | } | |
643 | ||
644 | ||
645 | static void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, const u8 *buf, | |
646 | size_t len, u16 stype, int ok) | |
647 | { | |
648 | struct ieee80211_hdr *hdr; | |
649 | hdr = (struct ieee80211_hdr *) buf; | |
650 | hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len)); | |
651 | if (hapd == NULL || hapd == HAPD_BROADCAST) | |
652 | return; | |
653 | ieee802_11_mgmt_cb(hapd, buf, len, stype, ok); | |
654 | } | |
655 | ||
656 | #endif /* NEED_AP_MLME */ | |
657 | ||
658 | ||
659 | static int hostapd_event_new_sta(struct hostapd_data *hapd, const u8 *addr) | |
660 | { | |
661 | struct sta_info *sta = ap_get_sta(hapd, addr); | |
662 | if (sta) | |
663 | return 0; | |
664 | ||
665 | wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR | |
666 | " - adding a new STA", MAC2STR(addr)); | |
667 | sta = ap_sta_add(hapd, addr); | |
668 | if (sta) { | |
669 | hostapd_new_assoc_sta(hapd, sta, 0); | |
670 | } else { | |
671 | wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR, | |
672 | MAC2STR(addr)); | |
673 | return -1; | |
674 | } | |
675 | ||
676 | return 0; | |
677 | } | |
678 | ||
679 | ||
680 | static void hostapd_event_eapol_rx(struct hostapd_data *hapd, const u8 *src, | |
681 | const u8 *data, size_t data_len) | |
682 | { | |
683 | struct hostapd_iface *iface = hapd->iface; | |
684 | struct sta_info *sta; | |
685 | size_t j; | |
686 | ||
687 | for (j = 0; j < iface->num_bss; j++) { | |
688 | if ((sta = ap_get_sta(iface->bss[j], src))) { | |
689 | if (sta->flags & WLAN_STA_ASSOC) { | |
690 | hapd = iface->bss[j]; | |
691 | break; | |
692 | } | |
693 | } | |
694 | } | |
695 | ||
696 | ieee802_1x_receive(hapd, src, data, data_len); | |
697 | } | |
698 | ||
699 | ||
700 | void wpa_supplicant_event(void *ctx, enum wpa_event_type event, | |
701 | union wpa_event_data *data) | |
702 | { | |
703 | struct hostapd_data *hapd = ctx; | |
704 | #ifndef CONFIG_NO_STDOUT_DEBUG | |
705 | int level = MSG_DEBUG; | |
706 | ||
707 | if (event == EVENT_RX_MGMT && data->rx_mgmt.frame && | |
708 | data->rx_mgmt.frame_len >= 24) { | |
709 | const struct ieee80211_hdr *hdr; | |
710 | u16 fc; | |
711 | hdr = (const struct ieee80211_hdr *) data->rx_mgmt.frame; | |
712 | fc = le_to_host16(hdr->frame_control); | |
713 | if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT && | |
714 | WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON) | |
715 | level = MSG_EXCESSIVE; | |
716 | } | |
717 | ||
718 | wpa_dbg(hapd->msg_ctx, level, "Event %s (%d) received", | |
719 | event_to_string(event), event); | |
720 | #endif /* CONFIG_NO_STDOUT_DEBUG */ | |
721 | ||
722 | switch (event) { | |
723 | case EVENT_MICHAEL_MIC_FAILURE: | |
724 | michael_mic_failure(hapd, data->michael_mic_failure.src, 1); | |
725 | break; | |
726 | case EVENT_SCAN_RESULTS: | |
727 | if (hapd->iface->scan_cb) | |
728 | hapd->iface->scan_cb(hapd->iface); | |
729 | break; | |
730 | #ifdef CONFIG_IEEE80211R | |
731 | case EVENT_FT_RRB_RX: | |
732 | wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src, | |
733 | data->ft_rrb_rx.data, data->ft_rrb_rx.data_len); | |
734 | break; | |
735 | #endif /* CONFIG_IEEE80211R */ | |
736 | case EVENT_WPS_BUTTON_PUSHED: | |
737 | hostapd_wps_button_pushed(hapd, NULL); | |
738 | break; | |
739 | #ifdef NEED_AP_MLME | |
740 | case EVENT_TX_STATUS: | |
741 | switch (data->tx_status.type) { | |
742 | case WLAN_FC_TYPE_MGMT: | |
743 | hostapd_mgmt_tx_cb(hapd, data->tx_status.data, | |
744 | data->tx_status.data_len, | |
745 | data->tx_status.stype, | |
746 | data->tx_status.ack); | |
747 | break; | |
748 | case WLAN_FC_TYPE_DATA: | |
749 | hostapd_tx_status(hapd, data->tx_status.dst, | |
750 | data->tx_status.data, | |
751 | data->tx_status.data_len, | |
752 | data->tx_status.ack); | |
753 | break; | |
754 | } | |
755 | break; | |
756 | case EVENT_EAPOL_TX_STATUS: | |
757 | hostapd_eapol_tx_status(hapd, data->eapol_tx_status.dst, | |
758 | data->eapol_tx_status.data, | |
759 | data->eapol_tx_status.data_len, | |
760 | data->eapol_tx_status.ack); | |
761 | break; | |
762 | case EVENT_DRIVER_CLIENT_POLL_OK: | |
763 | hostapd_client_poll_ok(hapd, data->client_poll.addr); | |
764 | break; | |
765 | case EVENT_RX_FROM_UNKNOWN: | |
766 | hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.bssid, | |
767 | data->rx_from_unknown.addr, | |
768 | data->rx_from_unknown.wds); | |
769 | break; | |
770 | case EVENT_RX_MGMT: | |
771 | hostapd_mgmt_rx(hapd, &data->rx_mgmt); | |
772 | break; | |
773 | #endif /* NEED_AP_MLME */ | |
774 | case EVENT_RX_PROBE_REQ: | |
775 | if (data->rx_probe_req.sa == NULL || | |
776 | data->rx_probe_req.ie == NULL) | |
777 | break; | |
778 | hostapd_probe_req_rx(hapd, data->rx_probe_req.sa, | |
779 | data->rx_probe_req.da, | |
780 | data->rx_probe_req.bssid, | |
781 | data->rx_probe_req.ie, | |
782 | data->rx_probe_req.ie_len, | |
783 | data->rx_probe_req.ssi_signal); | |
784 | break; | |
785 | case EVENT_NEW_STA: | |
786 | hostapd_event_new_sta(hapd, data->new_sta.addr); | |
787 | break; | |
788 | case EVENT_EAPOL_RX: | |
789 | hostapd_event_eapol_rx(hapd, data->eapol_rx.src, | |
790 | data->eapol_rx.data, | |
791 | data->eapol_rx.data_len); | |
792 | break; | |
793 | case EVENT_ASSOC: | |
794 | hostapd_notif_assoc(hapd, data->assoc_info.addr, | |
795 | data->assoc_info.req_ies, | |
796 | data->assoc_info.req_ies_len, | |
797 | data->assoc_info.reassoc); | |
798 | break; | |
799 | case EVENT_DISASSOC: | |
800 | if (data) | |
801 | hostapd_notif_disassoc(hapd, data->disassoc_info.addr); | |
802 | break; | |
803 | case EVENT_DEAUTH: | |
804 | if (data) | |
805 | hostapd_notif_disassoc(hapd, data->deauth_info.addr); | |
806 | break; | |
807 | case EVENT_STATION_LOW_ACK: | |
808 | if (!data) | |
809 | break; | |
810 | hostapd_event_sta_low_ack(hapd, data->low_ack.addr); | |
811 | break; | |
812 | case EVENT_RX_ACTION: | |
813 | if (data->rx_action.da == NULL || data->rx_action.sa == NULL || | |
814 | data->rx_action.bssid == NULL) | |
815 | break; | |
816 | #ifdef NEED_AP_MLME | |
817 | hostapd_rx_action(hapd, &data->rx_action); | |
818 | #endif /* NEED_AP_MLME */ | |
819 | hostapd_action_rx(hapd, &data->rx_action); | |
820 | break; | |
821 | case EVENT_AUTH: | |
822 | hostapd_notif_auth(hapd, &data->auth); | |
823 | break; | |
824 | case EVENT_CH_SWITCH: | |
825 | if (!data) | |
826 | break; | |
827 | hostapd_event_ch_switch(hapd, data->ch_switch.freq, | |
828 | data->ch_switch.ht_enabled, | |
829 | data->ch_switch.ch_offset); | |
830 | break; | |
831 | default: | |
832 | wpa_printf(MSG_DEBUG, "Unknown event %d", event); | |
833 | break; | |
834 | } | |
835 | } | |
836 | ||
837 | #endif /* HOSTAPD */ |