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"
24 #include "ieee802_11.h"
26 #include "accounting.h"
27 #include "tkip_countermeasures.h"
29 #include "ieee802_1x.h"
32 #include "wps_hostapd.h"
33 #include "ap_config.h"
36 int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
37 const u8 *ie, size_t ielen)
41 struct ieee802_11_elems elems;
45 * This could potentially happen with unexpected event from the
46 * driver wrapper. This was seen at least in one case where the
47 * driver ended up being set to station mode while hostapd was
48 * running, so better make sure we stop processing such an
51 wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
56 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
57 HOSTAPD_LEVEL_INFO, "associated");
59 ieee802_11_parse_elems(ie, ielen, &elems, 0);
61 ie = elems.wps_ie - 2;
62 ielen = elems.wps_ie_len + 2;
63 wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
64 } else if (elems.rsn_ie) {
65 ie = elems.rsn_ie - 2;
66 ielen = elems.rsn_ie_len + 2;
67 wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
68 } else if (elems.wpa_ie) {
69 ie = elems.wpa_ie - 2;
70 ielen = elems.wpa_ie_len + 2;
71 wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
75 wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
79 sta = ap_get_sta(hapd, addr);
81 accounting_sta_stop(hapd, sta);
83 sta = ap_sta_add(hapd, addr);
87 sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);
89 if (hapd->conf->wpa) {
90 if (ie == NULL || ielen == 0) {
91 if (hapd->conf->wps_state) {
92 wpa_printf(MSG_DEBUG, "STA did not include "
93 "WPA/RSN IE in (Re)Association "
94 "Request - possible WPS use");
95 sta->flags |= WLAN_STA_MAYBE_WPS;
99 wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
102 if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
103 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
104 sta->flags |= WLAN_STA_WPS;
108 if (sta->wpa_sm == NULL)
109 sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
111 if (sta->wpa_sm == NULL) {
112 wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
116 res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
118 if (res != WPA_IE_OK) {
120 wpa_printf(MSG_DEBUG, "WPA/RSN information element "
121 "rejected? (res %u)", res);
122 wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
123 if (res == WPA_INVALID_GROUP)
124 resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
125 else if (res == WPA_INVALID_PAIRWISE)
126 resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
127 else if (res == WPA_INVALID_AKMP)
128 resp = WLAN_REASON_AKMP_NOT_VALID;
129 #ifdef CONFIG_IEEE80211W
130 else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
131 resp = WLAN_REASON_INVALID_IE;
132 else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
133 resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
134 #endif /* CONFIG_IEEE80211W */
136 resp = WLAN_REASON_INVALID_IE;
137 hapd->drv.sta_disassoc(hapd, sta->addr, resp);
138 ap_free_sta(hapd, sta);
141 } else if (hapd->conf->wps_state) {
142 if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
143 os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
144 sta->flags |= WLAN_STA_WPS;
146 sta->flags |= WLAN_STA_MAYBE_WPS;
150 new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
151 sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
152 wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
154 hostapd_new_assoc_sta(hapd, sta, !new_assoc);
156 ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
162 void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
164 struct sta_info *sta;
166 hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
167 HOSTAPD_LEVEL_INFO, "disassociated");
169 sta = ap_get_sta(hapd, addr);
171 wpa_printf(MSG_DEBUG, "Disassociation notification for "
172 "unknown STA " MACSTR, MAC2STR(addr));
176 sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
177 wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
179 wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
180 sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
181 ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
182 ap_free_sta(hapd, sta);
190 static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
195 * PS-Poll frames are 16 bytes. All other frames are
196 * 24 bytes or longer.
201 fc = le_to_host16(hdr->frame_control);
202 type = WLAN_FC_GET_TYPE(fc);
203 stype = WLAN_FC_GET_STYPE(fc);
206 case WLAN_FC_TYPE_DATA:
209 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
210 case WLAN_FC_FROMDS | WLAN_FC_TODS:
218 case WLAN_FC_TYPE_CTRL:
219 if (stype != WLAN_FC_STYPE_PSPOLL)
222 case WLAN_FC_TYPE_MGMT:
230 #define HAPD_BROADCAST ((struct hostapd_data *) -1)
232 static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
239 if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
240 bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
241 return HAPD_BROADCAST;
243 for (i = 0; i < iface->num_bss; i++) {
244 if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
245 return iface->bss[i];
252 static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
253 const u8 *frame, size_t len)
255 const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) frame;
256 u16 fc = le_to_host16(hdr->frame_control);
257 hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
258 if (hapd == NULL || hapd == HAPD_BROADCAST)
261 ieee802_11_rx_from_unknown(hapd, hdr->addr2,
262 (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
263 (WLAN_FC_TODS | WLAN_FC_FROMDS));
267 static void hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt)
269 struct hostapd_iface *iface = hapd->iface;
270 const struct ieee80211_hdr *hdr;
272 struct hostapd_frame_info fi;
274 hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
275 bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
279 hapd = get_hapd_bssid(iface, bssid);
282 fc = le_to_host16(hdr->frame_control);
285 * Drop frames to unknown BSSIDs except for Beacon frames which
286 * could be used to update neighbor information.
288 if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
289 WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
290 hapd = iface->bss[0];
295 os_memset(&fi, 0, sizeof(fi));
296 fi.datarate = rx_mgmt->datarate;
297 fi.ssi_signal = rx_mgmt->ssi_signal;
299 if (hapd == HAPD_BROADCAST) {
301 for (i = 0; i < iface->num_bss; i++)
302 ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
303 rx_mgmt->frame_len, &fi);
305 ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi);
309 static void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, const u8 *buf,
310 size_t len, u16 stype, int ok)
312 struct ieee80211_hdr *hdr;
313 hdr = (struct ieee80211_hdr *) buf;
314 hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
315 if (hapd == NULL || hapd == HAPD_BROADCAST)
317 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
320 #endif /* NEED_AP_MLME */
323 static int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa,
324 const u8 *ie, size_t ie_len)
329 for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
330 if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
331 sa, ie, ie_len) > 0) {
340 static int hostapd_event_new_sta(struct hostapd_data *hapd, const u8 *addr)
342 struct sta_info *sta = ap_get_sta(hapd, addr);
346 wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
347 " - adding a new STA", MAC2STR(addr));
348 sta = ap_sta_add(hapd, addr);
350 hostapd_new_assoc_sta(hapd, sta, 0);
352 wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
361 static void hostapd_event_eapol_rx(struct hostapd_data *hapd, const u8 *src,
362 const u8 *data, size_t data_len)
364 struct hostapd_iface *iface = hapd->iface;
367 for (j = 0; j < iface->num_bss; j++) {
368 if (ap_get_sta(iface->bss[j], src)) {
369 hapd = iface->bss[j];
374 ieee802_1x_receive(hapd, src, data, data_len);
378 void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
379 union wpa_event_data *data)
381 struct hostapd_data *hapd = ctx;
384 case EVENT_MICHAEL_MIC_FAILURE:
385 michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
387 case EVENT_SCAN_RESULTS:
388 if (hapd->iface->scan_cb)
389 hapd->iface->scan_cb(hapd->iface);
391 #ifdef CONFIG_IEEE80211R
392 case EVENT_FT_RRB_RX:
393 wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
394 data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
396 #endif /* CONFIG_IEEE80211R */
397 case EVENT_WPS_BUTTON_PUSHED:
398 hostapd_wps_button_pushed(hapd);
401 case EVENT_TX_STATUS:
402 switch (data->tx_status.type) {
403 case WLAN_FC_TYPE_MGMT:
404 hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
405 data->tx_status.data_len,
406 data->tx_status.stype,
407 data->tx_status.ack);
409 case WLAN_FC_TYPE_DATA:
410 hostapd_tx_status(hapd, data->tx_status.dst,
411 data->tx_status.data,
412 data->tx_status.data_len,
413 data->tx_status.ack);
417 case EVENT_RX_FROM_UNKNOWN:
418 hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.frame,
419 data->rx_from_unknown.len);
422 hostapd_mgmt_rx(hapd, &data->rx_mgmt);
424 #endif /* NEED_AP_MLME */
425 case EVENT_RX_PROBE_REQ:
426 hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
427 data->rx_probe_req.ie,
428 data->rx_probe_req.ie_len);
431 hostapd_event_new_sta(hapd, data->new_sta.addr);
434 hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
436 data->eapol_rx.data_len);
439 hostapd_notif_assoc(hapd, data->assoc_info.addr,
440 data->assoc_info.req_ies,
441 data->assoc_info.req_ies_len);
445 hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
449 hostapd_notif_disassoc(hapd, data->deauth_info.addr);
452 wpa_printf(MSG_DEBUG, "Unknown event %d", event);