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
12 * See README and COPYING for more details.
15 #include "utils/includes.h"
17 #include "utils/common.h"
18 #include "radius/radius.h"
19 #include "drivers/driver.h"
20 #include "common/ieee802_11_defs.h"
21 #include "common/ieee802_11_common.h"
22 #include "common/wpa_ctrl.h"
26 #include "ieee802_11.h"
28 #include "accounting.h"
29 #include "tkip_countermeasures.h"
31 #include "ieee802_1x.h"
34 #include "wps_hostapd.h"
35 #include "ap_config.h"
38 int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
39 const u8 *ie, size_t ielen)
43 struct ieee802_11_elems elems;
45 const u8 *all_ies = ie;
46 size_t all_ies_len = ielen;
47 #endif /* CONFIG_P2P */
51 * This could potentially happen with unexpected event from the
52 * driver wrapper. This was seen at least in one case where the
53 * driver ended up being set to station mode while hostapd was
54 * running, so better make sure we stop processing such an
57 wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
62 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
63 HOSTAPD_LEVEL_INFO, "associated");
65 ieee802_11_parse_elems(ie, ielen, &elems, 0);
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");
81 wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
85 sta = ap_get_sta(hapd, addr);
87 accounting_sta_stop(hapd, sta);
89 sta = ap_sta_add(hapd, addr);
93 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
97 wpabuf_free(sta->p2p_ie);
98 sta->p2p_ie = ieee802_11_vendor_ie_concat(all_ies, all_ies_len,
101 #endif /* CONFIG_P2P */
103 if (hapd->conf->wpa) {
104 if (ie == NULL || ielen == 0) {
105 if (hapd->conf->wps_state) {
106 wpa_printf(MSG_DEBUG, "STA did not include "
107 "WPA/RSN IE in (Re)Association "
108 "Request - possible WPS use");
109 sta->flags |= WLAN_STA_MAYBE_WPS;
113 wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
116 if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
117 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
118 sta->flags |= WLAN_STA_WPS;
122 if (sta->wpa_sm == NULL)
123 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
125 if (sta->wpa_sm == NULL) {
126 wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
130 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
132 if (res != WPA_IE_OK) {
134 wpa_printf(MSG_DEBUG, "WPA/RSN information element "
135 "rejected? (res %u)", res);
136 wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
137 if (res == WPA_INVALID_GROUP)
138 resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
139 else if (res == WPA_INVALID_PAIRWISE)
140 resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
141 else if (res == WPA_INVALID_AKMP)
142 resp = WLAN_REASON_AKMP_NOT_VALID;
143 #ifdef CONFIG_IEEE80211W
144 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
145 resp = WLAN_REASON_INVALID_IE;
146 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
147 resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
148 #endif /* CONFIG_IEEE80211W */
150 resp = WLAN_REASON_INVALID_IE;
151 hapd->drv.sta_disassoc(hapd, sta->addr, resp);
152 ap_free_sta(hapd, sta);
155 } else if (hapd->conf->wps_state) {
156 #ifdef CONFIG_WPS_STRICT
158 wps = ieee802_11_vendor_ie_concat(ie, ielen,
160 if (wps && wps_validate_assoc_req(wps) < 0) {
161 hapd->drv.sta_disassoc(hapd, sta->addr,
162 WLAN_REASON_INVALID_IE);
163 ap_free_sta(hapd, sta);
168 #endif /* CONFIG_WPS_STRICT */
169 if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
170 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
171 sta->flags |= WLAN_STA_WPS;
173 sta->flags |= WLAN_STA_MAYBE_WPS;
177 new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
178 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
179 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
181 hostapd_new_assoc_sta(hapd, sta, !new_assoc);
183 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
187 p2p_group_notif_assoc(hapd->p2p_group, sta->addr,
188 all_ies, all_ies_len);
190 #endif /* CONFIG_P2P */
196 void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
198 struct sta_info *sta;
200 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
201 HOSTAPD_LEVEL_INFO, "disassociated");
203 sta = ap_get_sta(hapd, addr);
205 wpa_printf(MSG_DEBUG, "Disassociation notification for "
206 "unknown STA " MACSTR, MAC2STR(addr));
210 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
211 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
213 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
214 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
215 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
216 ap_free_sta(hapd, sta);
224 static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
229 * PS-Poll frames are 16 bytes. All other frames are
230 * 24 bytes or longer.
235 fc = le_to_host16(hdr->frame_control);
236 type = WLAN_FC_GET_TYPE(fc);
237 stype = WLAN_FC_GET_STYPE(fc);
240 case WLAN_FC_TYPE_DATA:
243 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
244 case WLAN_FC_FROMDS | WLAN_FC_TODS:
252 case WLAN_FC_TYPE_CTRL:
253 if (stype != WLAN_FC_STYPE_PSPOLL)
256 case WLAN_FC_TYPE_MGMT:
264 #define HAPD_BROADCAST ((struct hostapd_data *) -1)
266 static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
273 if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
274 bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
275 return HAPD_BROADCAST;
277 for (i = 0; i < iface->num_bss; i++) {
278 if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
279 return iface->bss[i];
286 static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
287 const u8 *frame, size_t len)
289 const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) frame;
290 u16 fc = le_to_host16(hdr->frame_control);
291 hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
292 if (hapd == NULL || hapd == HAPD_BROADCAST)
295 ieee802_11_rx_from_unknown(hapd, hdr->addr2,
296 (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
297 (WLAN_FC_TODS | WLAN_FC_FROMDS));
301 static void hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt)
303 struct hostapd_iface *iface = hapd->iface;
304 const struct ieee80211_hdr *hdr;
306 struct hostapd_frame_info fi;
308 hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
309 bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
313 hapd = get_hapd_bssid(iface, bssid);
316 fc = le_to_host16(hdr->frame_control);
319 * Drop frames to unknown BSSIDs except for Beacon frames which
320 * could be used to update neighbor information.
322 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
323 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
324 hapd = iface->bss[0];
329 os_memset(&fi, 0, sizeof(fi));
330 fi.datarate = rx_mgmt->datarate;
331 fi.ssi_signal = rx_mgmt->ssi_signal;
333 if (hapd == HAPD_BROADCAST) {
335 for (i = 0; i < iface->num_bss; i++)
336 ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
337 rx_mgmt->frame_len, &fi);
339 ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi);
343 static void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, const u8 *buf,
344 size_t len, u16 stype, int ok)
346 struct ieee80211_hdr *hdr;
347 hdr = (struct ieee80211_hdr *) buf;
348 hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
349 if (hapd == NULL || hapd == HAPD_BROADCAST)
351 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
354 #endif /* NEED_AP_MLME */
357 static int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa,
358 const u8 *ie, size_t ie_len)
363 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
364 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
365 sa, ie, ie_len) > 0) {
374 static int hostapd_event_new_sta(struct hostapd_data *hapd, const u8 *addr)
376 struct sta_info *sta = ap_get_sta(hapd, addr);
380 wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
381 " - adding a new STA", MAC2STR(addr));
382 sta = ap_sta_add(hapd, addr);
384 hostapd_new_assoc_sta(hapd, sta, 0);
386 wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
395 static void hostapd_event_eapol_rx(struct hostapd_data *hapd, const u8 *src,
396 const u8 *data, size_t data_len)
398 struct hostapd_iface *iface = hapd->iface;
401 for (j = 0; j < iface->num_bss; j++) {
402 if (ap_get_sta(iface->bss[j], src)) {
403 hapd = iface->bss[j];
408 ieee802_1x_receive(hapd, src, data, data_len);
412 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
413 union wpa_event_data *data)
415 struct hostapd_data *hapd = ctx;
418 case EVENT_MICHAEL_MIC_FAILURE:
419 michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
421 case EVENT_SCAN_RESULTS:
422 if (hapd->iface->scan_cb)
423 hapd->iface->scan_cb(hapd->iface);
425 #ifdef CONFIG_IEEE80211R
426 case EVENT_FT_RRB_RX:
427 wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
428 data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
430 #endif /* CONFIG_IEEE80211R */
431 case EVENT_WPS_BUTTON_PUSHED:
432 hostapd_wps_button_pushed(hapd);
435 case EVENT_TX_STATUS:
436 switch (data->tx_status.type) {
437 case WLAN_FC_TYPE_MGMT:
438 hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
439 data->tx_status.data_len,
440 data->tx_status.stype,
441 data->tx_status.ack);
443 case WLAN_FC_TYPE_DATA:
444 hostapd_tx_status(hapd, data->tx_status.dst,
445 data->tx_status.data,
446 data->tx_status.data_len,
447 data->tx_status.ack);
451 case EVENT_RX_FROM_UNKNOWN:
452 hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.frame,
453 data->rx_from_unknown.len);
456 hostapd_mgmt_rx(hapd, &data->rx_mgmt);
458 #endif /* NEED_AP_MLME */
459 case EVENT_RX_PROBE_REQ:
460 hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
461 data->rx_probe_req.ie,
462 data->rx_probe_req.ie_len);
465 hostapd_event_new_sta(hapd, data->new_sta.addr);
468 hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
470 data->eapol_rx.data_len);
473 hostapd_notif_assoc(hapd, data->assoc_info.addr,
474 data->assoc_info.req_ies,
475 data->assoc_info.req_ies_len);
479 hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
483 hostapd_notif_disassoc(hapd, data->deauth_info.addr);
486 wpa_printf(MSG_DEBUG, "Unknown event %d", event);