Replace direct driver call to wpa_ft_rrb_rx() with driver event
[hostap-gosc2009.git] / hostapd / drv_callbacks.c
blobdb6b19f4b07107833df2eca2805fab571cacd57e
1 /*
2 * hostapd / Callback functions for driver wrappers
3 * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
10 * license.
12 * See README and COPYING for more details.
15 #include "includes.h"
17 #include "common.h"
18 #include "hostapd.h"
19 #include "driver_i.h"
20 #include "ieee802_11.h"
21 #include "radius/radius.h"
22 #include "sta_flags.h"
23 #include "sta_info.h"
24 #include "accounting.h"
25 #include "tkip_countermeasures.h"
26 #include "ieee802_1x.h"
27 #include "wpa.h"
28 #include "iapp.h"
29 #include "wme.h"
30 #include "wps_hostapd.h"
33 struct prune_data {
34 struct hostapd_data *hapd;
35 const u8 *addr;
38 static int prune_associations(struct hostapd_iface *iface, void *ctx)
40 struct prune_data *data = ctx;
41 struct sta_info *osta;
42 struct hostapd_data *ohapd;
43 size_t j;
45 for (j = 0; j < iface->num_bss; j++) {
46 ohapd = iface->bss[j];
47 if (ohapd == data->hapd)
48 continue;
49 osta = ap_get_sta(ohapd, data->addr);
50 if (!osta)
51 continue;
53 ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
56 return 0;
59 /**
60 * hostapd_prune_associations - Remove extraneous associations
61 * @hapd: Pointer to BSS data for the most recent association
62 * @sta: Pointer to the associated STA data
64 * This function looks through all radios and BSS's for previous
65 * (stale) associations of STA. If any are found they are removed.
67 static void hostapd_prune_associations(struct hostapd_data *hapd,
68 struct sta_info *sta)
70 struct prune_data data;
71 data.hapd = hapd;
72 data.addr = sta->addr;
73 hostapd_for_each_interface(prune_associations, &data);
77 /**
78 * hostapd_new_assoc_sta - Notify that a new station associated with the AP
79 * @hapd: Pointer to BSS data
80 * @sta: Pointer to the associated STA data
81 * @reassoc: 1 to indicate this was a re-association; 0 = first association
83 * This function will be called whenever a station associates with the AP. It
84 * can be called from ieee802_11.c for drivers that export MLME to hostapd and
85 * from driver_*.c for drivers that take care of management frames (IEEE 802.11
86 * authentication and association) internally.
88 void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
89 int reassoc)
91 if (hapd->tkip_countermeasures) {
92 hostapd_sta_deauth(hapd, sta->addr,
93 WLAN_REASON_MICHAEL_MIC_FAILURE);
94 return;
97 hostapd_prune_associations(hapd, sta);
99 /* IEEE 802.11F (IAPP) */
100 if (hapd->conf->ieee802_11f)
101 iapp_new_station(hapd->iapp, sta);
103 /* Start accounting here, if IEEE 802.1X and WPA are not used.
104 * IEEE 802.1X/WPA code will start accounting after the station has
105 * been authorized. */
106 if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
107 accounting_sta_start(hapd, sta);
109 hostapd_wmm_sta_config(hapd, sta);
111 /* Start IEEE 802.1X authentication process for new stations */
112 ieee802_1x_new_station(hapd, sta);
113 if (reassoc) {
114 if (sta->auth_alg != WLAN_AUTH_FT &&
115 !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
116 wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
117 } else
118 wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
122 void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
123 const u8 *buf, size_t len, int ack)
125 struct sta_info *sta;
126 struct hostapd_iface *iface = hapd->iface;
128 sta = ap_get_sta(hapd, addr);
129 if (sta == NULL && iface->num_bss > 1) {
130 size_t j;
131 for (j = 0; j < iface->num_bss; j++) {
132 hapd = iface->bss[j];
133 sta = ap_get_sta(hapd, addr);
134 if (sta)
135 break;
138 if (sta == NULL)
139 return;
140 if (sta->flags & WLAN_STA_PENDING_POLL) {
141 wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
142 "activity poll", MAC2STR(sta->addr),
143 ack ? "ACKed" : "did not ACK");
144 if (ack)
145 sta->flags &= ~WLAN_STA_PENDING_POLL;
148 ieee802_1x_tx_status(hapd, sta, buf, len, ack);
152 static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
154 u16 fc, type, stype;
157 * PS-Poll frames are 16 bytes. All other frames are
158 * 24 bytes or longer.
160 if (len < 16)
161 return NULL;
163 fc = le_to_host16(hdr->frame_control);
164 type = WLAN_FC_GET_TYPE(fc);
165 stype = WLAN_FC_GET_STYPE(fc);
167 switch (type) {
168 case WLAN_FC_TYPE_DATA:
169 if (len < 24)
170 return NULL;
171 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
172 case WLAN_FC_TODS:
173 return hdr->addr1;
174 case WLAN_FC_FROMDS:
175 return hdr->addr2;
176 default:
177 return NULL;
179 case WLAN_FC_TYPE_CTRL:
180 if (stype != WLAN_FC_STYPE_PSPOLL)
181 return NULL;
182 return hdr->addr1;
183 case WLAN_FC_TYPE_MGMT:
184 return hdr->addr3;
185 default:
186 return NULL;
191 #define HAPD_BROADCAST ((struct hostapd_data *) -1)
193 static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
194 const u8 *bssid)
196 size_t i;
198 if (bssid == NULL)
199 return NULL;
200 if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
201 bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
202 return HAPD_BROADCAST;
204 for (i = 0; i < iface->num_bss; i++) {
205 if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
206 return iface->bss[i];
209 return NULL;
213 void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
214 const struct ieee80211_hdr *hdr, size_t len)
216 struct sta_info *sta;
217 const u8 *addr;
219 hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
220 if (hapd == NULL || hapd == HAPD_BROADCAST)
221 return;
223 addr = hdr->addr2;
224 sta = ap_get_sta(hapd, addr);
225 if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
226 wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated "
227 "STA " MACSTR, MAC2STR(addr));
228 if (sta && (sta->flags & WLAN_STA_AUTH))
229 hostapd_sta_disassoc(
230 hapd, addr,
231 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
232 else
233 hostapd_sta_deauth(
234 hapd, addr,
235 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
240 int hostapd_notif_new_sta(struct hostapd_data *hapd, const u8 *addr)
242 struct sta_info *sta = ap_get_sta(hapd, addr);
243 if (sta)
244 return 0;
246 wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
247 " - adding a new STA", MAC2STR(addr));
248 sta = ap_sta_add(hapd, addr);
249 if (sta) {
250 hostapd_new_assoc_sta(hapd, sta, 0);
251 } else {
252 wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
253 MAC2STR(addr));
254 return -1;
257 return 0;
261 int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
262 const u8 *ie, size_t ielen)
264 struct sta_info *sta;
265 int new_assoc, res;
267 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
268 HOSTAPD_LEVEL_INFO, "associated");
270 sta = ap_get_sta(hapd, addr);
271 if (sta) {
272 accounting_sta_stop(hapd, sta);
273 } else {
274 sta = ap_sta_add(hapd, addr);
275 if (sta == NULL)
276 return -1;
278 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
280 if (hapd->conf->wpa) {
281 if (ie == NULL || ielen == 0) {
282 if (hapd->conf->wps_state) {
283 wpa_printf(MSG_DEBUG, "STA did not include "
284 "WPA/RSN IE in (Re)Association "
285 "Request - possible WPS use");
286 sta->flags |= WLAN_STA_MAYBE_WPS;
287 goto skip_wpa_check;
290 wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
291 return -1;
293 if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
294 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
295 sta->flags |= WLAN_STA_WPS;
296 goto skip_wpa_check;
299 if (sta->wpa_sm == NULL)
300 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
301 sta->addr);
302 if (sta->wpa_sm == NULL) {
303 wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
304 "machine");
305 return -1;
307 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
308 ie, ielen, NULL, 0);
309 if (res != WPA_IE_OK) {
310 int resp;
311 wpa_printf(MSG_DEBUG, "WPA/RSN information element "
312 "rejected? (res %u)", res);
313 wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
314 if (res == WPA_INVALID_GROUP)
315 resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
316 else if (res == WPA_INVALID_PAIRWISE)
317 resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
318 else if (res == WPA_INVALID_AKMP)
319 resp = WLAN_REASON_AKMP_NOT_VALID;
320 #ifdef CONFIG_IEEE80211W
321 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
322 resp = WLAN_REASON_INVALID_IE;
323 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
324 resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
325 #endif /* CONFIG_IEEE80211W */
326 else
327 resp = WLAN_REASON_INVALID_IE;
328 hostapd_sta_disassoc(hapd, sta->addr, resp);
329 ap_free_sta(hapd, sta);
330 return -1;
332 } else if (hapd->conf->wps_state) {
333 if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
334 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
335 sta->flags |= WLAN_STA_WPS;
336 } else
337 sta->flags |= WLAN_STA_MAYBE_WPS;
339 skip_wpa_check:
341 new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
342 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
343 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
345 hostapd_new_assoc_sta(hapd, sta, !new_assoc);
347 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
349 return 0;
353 void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
355 struct sta_info *sta;
357 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
358 HOSTAPD_LEVEL_INFO, "disassociated");
360 sta = ap_get_sta(hapd, addr);
361 if (sta == NULL) {
362 wpa_printf(MSG_DEBUG, "Disassociation notification for "
363 "unknown STA " MACSTR, MAC2STR(addr));
364 return;
367 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
368 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
369 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
370 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
371 ap_free_sta(hapd, sta);
375 void hostapd_eapol_receive(struct hostapd_data *hapd, const u8 *sa,
376 const u8 *buf, size_t len)
378 ieee802_1x_receive(hapd, sa, buf, len);
382 #ifdef NEED_AP_MLME
383 void hostapd_mgmt_rx(struct hostapd_data *hapd, u8 *buf, size_t len,
384 u16 stype, struct hostapd_frame_info *fi)
386 struct hostapd_iface *iface = hapd->iface;
387 struct ieee80211_hdr *hdr;
388 const u8 *bssid;
390 hdr = (struct ieee80211_hdr *) buf;
391 bssid = get_hdr_bssid(hdr, len);
392 if (bssid == NULL)
393 return;
395 hapd = get_hapd_bssid(iface, bssid);
396 if (hapd == NULL) {
397 u16 fc;
398 fc = le_to_host16(hdr->frame_control);
401 * Drop frames to unknown BSSIDs except for Beacon frames which
402 * could be used to update neighbor information.
404 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
405 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
406 hapd = iface->bss[0];
407 else
408 return;
411 if (hapd == HAPD_BROADCAST) {
412 size_t i;
413 for (i = 0; i < iface->num_bss; i++)
414 ieee802_11_mgmt(iface->bss[i], buf, len, stype, fi);
415 } else
416 ieee802_11_mgmt(hapd, buf, len, stype, fi);
420 void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, u8 *buf, size_t len,
421 u16 stype, int ok)
423 struct ieee80211_hdr *hdr;
424 hdr = (struct ieee80211_hdr *) buf;
425 hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
426 if (hapd == NULL || hapd == HAPD_BROADCAST)
427 return;
428 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
430 #endif /* NEED_AP_MLME */
433 void hostapd_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr)
435 michael_mic_failure(hapd, addr, 1);
439 struct hostapd_data * hostapd_sta_get_bss(struct hostapd_data *hapd,
440 const u8 *addr)
442 struct hostapd_iface *iface = hapd->iface;
443 size_t j;
445 for (j = 0; j < iface->num_bss; j++) {
446 hapd = iface->bss[j];
447 if (ap_get_sta(hapd, addr))
448 return hapd;
451 return NULL;
455 #ifndef CONFIG_AP
456 void wpa_supplicant_event(void *ctx, wpa_event_type event,
457 union wpa_event_data *data)
459 struct hostapd_data *hapd = ctx;
461 switch (event) {
462 case EVENT_MICHAEL_MIC_FAILURE:
463 michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
464 break;
465 case EVENT_SCAN_RESULTS:
466 if (hapd->iface->scan_cb)
467 hapd->iface->scan_cb(hapd->iface);
468 break;
469 #ifdef CONFIG_IEEE80211R
470 wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
471 data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
472 break;
473 #endif /* CONFIG_IEEE80211R */
474 default:
475 wpa_printf(MSG_DEBUG, "Unknown event %d", event);
476 break;
479 #endif /* CONFIG_AP */
482 void hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa,
483 const u8 *ie, size_t ie_len)
485 size_t i;
487 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
488 hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
489 sa, ie, ie_len);
493 void hostapd_button_pushed(struct hostapd_data *hapd)
495 hostapd_wps_button_pushed(hapd);