[thirdparty/hostap.git] / src / ap / drv_callbacks.c

/*
 * hostapd / Callback functions for driver wrappers
 * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Alternatively, this software may be distributed under the terms of BSD
 * license.
 *
 * See README and COPYING for more details.
 */

#include "utils/includes.h"

#include "utils/common.h"
#include "radius/radius.h"
#include "drivers/driver.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/wpa_ctrl.h"
#include "crypto/random.h"
#include "p2p/p2p.h"
#include "wps/wps.h"
#include "hostapd.h"
#include "ieee802_11.h"
#include "sta_info.h"
#include "accounting.h"
#include "tkip_countermeasures.h"
#include "iapp.h"
#include "ieee802_1x.h"
#include "wpa_auth.h"
#include "wmm.h"
#include "wps_hostapd.h"
#include "ap_drv_ops.h"
#include "ap_config.h"


int hostapd_notif_assoc(struct hostapd_data *hapd, const u8 *addr,
			const u8 *ie, size_t ielen)
{
	struct sta_info *sta;
	int new_assoc, res;
	struct ieee802_11_elems elems;
#ifdef CONFIG_P2P
	const u8 *all_ies = ie;
	size_t all_ies_len = ielen;
#endif /* CONFIG_P2P */

	if (addr == NULL) {
		/*
		 * This could potentially happen with unexpected event from the
		 * driver wrapper. This was seen at least in one case where the
		 * driver ended up being set to station mode while hostapd was
		 * running, so better make sure we stop processing such an
		 * event here.
		 */
		wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
			   "no address");
		return -1;
	}
	random_add_randomness(addr, ETH_ALEN);

	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_INFO, "associated");

	ieee802_11_parse_elems(ie, ielen, &elems, 0);
	if (elems.wps_ie) {
		ie = elems.wps_ie - 2;
		ielen = elems.wps_ie_len + 2;
		wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
	} else if (elems.rsn_ie) {
		ie = elems.rsn_ie - 2;
		ielen = elems.rsn_ie_len + 2;
		wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
	} else if (elems.wpa_ie) {
		ie = elems.wpa_ie - 2;
		ielen = elems.wpa_ie_len + 2;
		wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
	} else {
		ie = NULL;
		ielen = 0;
		wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
			   "(Re)AssocReq");
	}

	sta = ap_get_sta(hapd, addr);
	if (sta) {
		accounting_sta_stop(hapd, sta);
	} else {
		sta = ap_sta_add(hapd, addr);
		if (sta == NULL)
			return -1;
	}
	sta->flags &= ~(WLAN_STA_WPS | WLAN_STA_MAYBE_WPS);

#ifdef CONFIG_P2P
	if (elems.p2p) {
		wpabuf_free(sta->p2p_ie);
		sta->p2p_ie = ieee802_11_vendor_ie_concat(all_ies, all_ies_len,
							  P2P_IE_VENDOR_TYPE);
	}
#endif /* CONFIG_P2P */

	if (hapd->conf->wpa) {
		if (ie == NULL || ielen == 0) {
			if (hapd->conf->wps_state) {
				wpa_printf(MSG_DEBUG, "STA did not include "
					   "WPA/RSN IE in (Re)Association "
					   "Request - possible WPS use");
				sta->flags |= WLAN_STA_MAYBE_WPS;
				goto skip_wpa_check;
			}

			wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
			return -1;
		}
		if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
		    os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
			sta->flags |= WLAN_STA_WPS;
			goto skip_wpa_check;
		}

		if (sta->wpa_sm == NULL)
			sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
							sta->addr);
		if (sta->wpa_sm == NULL) {
			wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
				   "machine");
			return -1;
		}
		res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
					  ie, ielen, NULL, 0);
		if (res != WPA_IE_OK) {
			int resp;
			wpa_printf(MSG_DEBUG, "WPA/RSN information element "
				   "rejected? (res %u)", res);
			wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
			if (res == WPA_INVALID_GROUP)
				resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
			else if (res == WPA_INVALID_PAIRWISE)
				resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
			else if (res == WPA_INVALID_AKMP)
				resp = WLAN_REASON_AKMP_NOT_VALID;
#ifdef CONFIG_IEEE80211W
			else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
				resp = WLAN_REASON_INVALID_IE;
			else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
				resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
#endif /* CONFIG_IEEE80211W */
			else
				resp = WLAN_REASON_INVALID_IE;
			hostapd_drv_sta_disassoc(hapd, sta->addr, resp);
			ap_free_sta(hapd, sta);
			return -1;
		}
	} else if (hapd->conf->wps_state) {
#ifdef CONFIG_WPS_STRICT
		struct wpabuf *wps;
		wps = ieee802_11_vendor_ie_concat(ie, ielen,
						  WPS_IE_VENDOR_TYPE);
		if (wps && wps_validate_assoc_req(wps) < 0) {
			hostapd_drv_sta_disassoc(hapd, sta->addr,
						 WLAN_REASON_INVALID_IE);
			ap_free_sta(hapd, sta);
			wpabuf_free(wps);
			return -1;
		}
		wpabuf_free(wps);
#endif /* CONFIG_WPS_STRICT */
		if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
		    os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
			sta->flags |= WLAN_STA_WPS;
		} else
			sta->flags |= WLAN_STA_MAYBE_WPS;
	}
skip_wpa_check:

	new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
	sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
	wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);

	hostapd_new_assoc_sta(hapd, sta, !new_assoc);

	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);

#ifdef CONFIG_P2P
	p2p_group_notif_assoc(hapd->p2p_group, sta->addr,
			      all_ies, all_ies_len);
#endif /* CONFIG_P2P */

	return 0;
}


void hostapd_notif_disassoc(struct hostapd_data *hapd, const u8 *addr)
{
	struct sta_info *sta;

	if (addr == NULL) {
		/*
		 * This could potentially happen with unexpected event from the
		 * driver wrapper. This was seen at least in one case where the
		 * driver ended up reporting a station mode event while hostapd
		 * was running, so better make sure we stop processing such an
		 * event here.
		 */
		wpa_printf(MSG_DEBUG, "hostapd_notif_disassoc: Skip event "
			   "with no address");
		return;
	}

	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_INFO, "disassociated");

	sta = ap_get_sta(hapd, addr);
	if (sta == NULL) {
		wpa_printf(MSG_DEBUG, "Disassociation notification for "
			   "unknown STA " MACSTR, MAC2STR(addr));
		return;
	}

	sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
		MAC2STR(sta->addr));
	wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
	ap_free_sta(hapd, sta);
}


void hostapd_event_sta_low_ack(struct hostapd_data *hapd, const u8 *addr)
{
	struct sta_info *sta = ap_get_sta(hapd, addr);

	if (!sta || !hapd->conf->disassoc_low_ack)
		return;

	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
		       HOSTAPD_LEVEL_INFO, "disconnected due to excessive "
		       "missing ACKs");
	hostapd_drv_sta_disassoc(hapd, addr, WLAN_REASON_DISASSOC_LOW_ACK);
	if (sta)
		ap_sta_disassociate(hapd, sta, WLAN_REASON_DISASSOC_LOW_ACK);
}


#ifdef HOSTAPD

#ifdef NEED_AP_MLME

static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
{
	u16 fc, type, stype;

	/*
	 * PS-Poll frames are 16 bytes. All other frames are
	 * 24 bytes or longer.
	 */
	if (len < 16)
		return NULL;

	fc = le_to_host16(hdr->frame_control);
	type = WLAN_FC_GET_TYPE(fc);
	stype = WLAN_FC_GET_STYPE(fc);

	switch (type) {
	case WLAN_FC_TYPE_DATA:
		if (len < 24)
			return NULL;
		switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
		case WLAN_FC_FROMDS | WLAN_FC_TODS:
		case WLAN_FC_TODS:
			return hdr->addr1;
		case WLAN_FC_FROMDS:
			return hdr->addr2;
		default:
			return NULL;
		}
	case WLAN_FC_TYPE_CTRL:
		if (stype != WLAN_FC_STYPE_PSPOLL)
			return NULL;
		return hdr->addr1;
	case WLAN_FC_TYPE_MGMT:
		return hdr->addr3;
	default:
		return NULL;
	}
}


#define HAPD_BROADCAST ((struct hostapd_data *) -1)

static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
					    const u8 *bssid)
{
	size_t i;

	if (bssid == NULL)
		return NULL;
	if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
	    bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
		return HAPD_BROADCAST;

	for (i = 0; i < iface->num_bss; i++) {
		if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
			return iface->bss[i];
	}

	return NULL;
}


static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
					const u8 *frame, size_t len)
{
	const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) frame;
	u16 fc = le_to_host16(hdr->frame_control);
	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	if (hapd == NULL || hapd == HAPD_BROADCAST)
		return;

	ieee802_11_rx_from_unknown(hapd, hdr->addr2,
				   (fc & (WLAN_FC_TODS | WLAN_FC_FROMDS)) ==
				   (WLAN_FC_TODS | WLAN_FC_FROMDS));
}


static void hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt)
{
	struct hostapd_iface *iface = hapd->iface;
	const struct ieee80211_hdr *hdr;
	const u8 *bssid;
	struct hostapd_frame_info fi;

	hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
	bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
	if (bssid == NULL)
		return;

	hapd = get_hapd_bssid(iface, bssid);
	if (hapd == NULL) {
		u16 fc;
		fc = le_to_host16(hdr->frame_control);

		/*
		 * Drop frames to unknown BSSIDs except for Beacon frames which
		 * could be used to update neighbor information.
		 */
		if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
		    WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
			hapd = iface->bss[0];
		else
			return;
	}

	os_memset(&fi, 0, sizeof(fi));
	fi.datarate = rx_mgmt->datarate;
	fi.ssi_signal = rx_mgmt->ssi_signal;

	if (hapd == HAPD_BROADCAST) {
		size_t i;
		for (i = 0; i < iface->num_bss; i++)
			ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
					rx_mgmt->frame_len, &fi);
	} else
		ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi);

	random_add_randomness(&fi, sizeof(fi));
}


static void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, const u8 *buf,
			       size_t len, u16 stype, int ok)
{
	struct ieee80211_hdr *hdr;
	hdr = (struct ieee80211_hdr *) buf;
	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	if (hapd == NULL || hapd == HAPD_BROADCAST)
		return;
	ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
}

#endif /* NEED_AP_MLME */


static int hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa,
				const u8 *ie, size_t ie_len)
{
	size_t i;
	int ret = 0;

	if (sa)
		random_add_randomness(sa, ETH_ALEN);
	for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
		if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
					    sa, ie, ie_len) > 0) {
			ret = 1;
			break;
		}
	}
	return ret;
}


static int hostapd_event_new_sta(struct hostapd_data *hapd, const u8 *addr)
{
	struct sta_info *sta = ap_get_sta(hapd, addr);
	if (sta)
		return 0;

	wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
		   " - adding a new STA", MAC2STR(addr));
	sta = ap_sta_add(hapd, addr);
	if (sta) {
		hostapd_new_assoc_sta(hapd, sta, 0);
	} else {
		wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
			   MAC2STR(addr));
		return -1;
	}

	return 0;
}


static void hostapd_event_eapol_rx(struct hostapd_data *hapd, const u8 *src,
				   const u8 *data, size_t data_len)
{
	struct hostapd_iface *iface = hapd->iface;
	size_t j;

	for (j = 0; j < iface->num_bss; j++) {
		if (ap_get_sta(iface->bss[j], src)) {
			hapd = iface->bss[j];
			break;
		}
	}

	ieee802_1x_receive(hapd, src, data, data_len);
}


void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
			  union wpa_event_data *data)
{
	struct hostapd_data *hapd = ctx;

	switch (event) {
	case EVENT_MICHAEL_MIC_FAILURE:
		michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
		break;
	case EVENT_SCAN_RESULTS:
		if (hapd->iface->scan_cb)
			hapd->iface->scan_cb(hapd->iface);
		break;
#ifdef CONFIG_IEEE80211R
	case EVENT_FT_RRB_RX:
		wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
			      data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
		break;
#endif /* CONFIG_IEEE80211R */
	case EVENT_WPS_BUTTON_PUSHED:
		hostapd_wps_button_pushed(hapd);
		break;
#ifdef NEED_AP_MLME
	case EVENT_TX_STATUS:
		switch (data->tx_status.type) {
		case WLAN_FC_TYPE_MGMT:
			hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
					   data->tx_status.data_len,
					   data->tx_status.stype,
					   data->tx_status.ack);
			break;
		case WLAN_FC_TYPE_DATA:
			hostapd_tx_status(hapd, data->tx_status.dst,
					  data->tx_status.data,
					  data->tx_status.data_len,
					  data->tx_status.ack);
			break;
		}
		break;
	case EVENT_RX_FROM_UNKNOWN:
		hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.frame,
					    data->rx_from_unknown.len);
		break;
	case EVENT_RX_MGMT:
		hostapd_mgmt_rx(hapd, &data->rx_mgmt);
		break;
#endif /* NEED_AP_MLME */
	case EVENT_RX_PROBE_REQ:
		hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
				     data->rx_probe_req.ie,
				     data->rx_probe_req.ie_len);
		break;
	case EVENT_NEW_STA:
		hostapd_event_new_sta(hapd, data->new_sta.addr);
		break;
	case EVENT_EAPOL_RX:
		hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
				       data->eapol_rx.data,
				       data->eapol_rx.data_len);
		break;
	case EVENT_ASSOC:
		hostapd_notif_assoc(hapd, data->assoc_info.addr,
				    data->assoc_info.req_ies,
				    data->assoc_info.req_ies_len);
		break;
	case EVENT_DISASSOC:
		if (data)
			hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
		break;
	case EVENT_DEAUTH:
		if (data)
			hostapd_notif_disassoc(hapd, data->deauth_info.addr);
		break;
	case EVENT_STATION_LOW_ACK:
		if (!data)
			break;
		hostapd_event_sta_low_ack(hapd, data->low_ack.addr);
		break;
	default:
		wpa_printf(MSG_DEBUG, "Unknown event %d", event);
		break;
	}
}

#endif /* HOSTAPD */
Commit	Line	Data
b5b969e9 JM	1	/*
	2	* hostapd / Callback functions for driver wrappers
	3	* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
	4	*
	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.
	8	*
	9	* Alternatively, this software may be distributed under the terms of BSD
	10	* license.
	11	*
	12	* See README and COPYING for more details.
	13	*/
	14
6226e38d	15	#include "utils/includes.h"
b5b969e9	16
6226e38d	17	#include "utils/common.h"
b5b969e9	18	#include "radius/radius.h"
6e6e8c31	19	#include "drivers/driver.h"
81f4f619	20	#include "common/ieee802_11_defs.h"
c41a1095	21	#include "common/ieee802_11_common.h"
9a3cb18d	22	#include "common/wpa_ctrl.h"
bbb921da	23	#include "crypto/random.h"
ef796391	24	#include "p2p/p2p.h"
54f489be	25	#include "wps/wps.h"
6226e38d JM	26	#include "hostapd.h"
	27	#include "ieee802_11.h"
	28	#include "sta_info.h"
	29	#include "accounting.h"
	30	#include "tkip_countermeasures.h"
	31	#include "iapp.h"
	32	#include "ieee802_1x.h"
	33	#include "wpa_auth.h"
	34	#include "wmm.h"
	35	#include "wps_hostapd.h"
51e2a27a	36	#include "ap_drv_ops.h"
8b06c1ed	37	#include "ap_config.h"
b5b969e9 JM	38
b5b969e9 JM	39
b5b969e9 JM	40	int hostapd_notif_assoc(struct hostapd_data hapd, const u8 addr,
	41	const u8 *ie, size_t ielen)
	42	{
	43	struct sta_info *sta;
	44	int new_assoc, res;
c41a1095	45	struct ieee802_11_elems elems;
b305c684 JM	46	#ifdef CONFIG_P2P
	47	const u8 *all_ies = ie;
	48	size_t all_ies_len = ielen;
	49	#endif /* CONFIG_P2P */
b5b969e9	50
68532a9c JM	51	if (addr == NULL) {
	52	/*
	53	* This could potentially happen with unexpected event from the
	54	* driver wrapper. This was seen at least in one case where the
	55	* driver ended up being set to station mode while hostapd was
	56	* running, so better make sure we stop processing such an
	57	* event here.
	58	*/
	59	wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
	60	"no address");
	61	return -1;
	62	}
bbb921da	63	random_add_randomness(addr, ETH_ALEN);
68532a9c	64
b5b969e9 JM	65	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	66	HOSTAPD_LEVEL_INFO, "associated");
	67
c41a1095 JM	68	ieee802_11_parse_elems(ie, ielen, &elems, 0);
	69	if (elems.wps_ie) {
	70	ie = elems.wps_ie - 2;
	71	ielen = elems.wps_ie_len + 2;
	72	wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
	73	} else if (elems.rsn_ie) {
	74	ie = elems.rsn_ie - 2;
	75	ielen = elems.rsn_ie_len + 2;
	76	wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
	77	} else if (elems.wpa_ie) {
	78	ie = elems.wpa_ie - 2;
	79	ielen = elems.wpa_ie_len + 2;
	80	wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
	81	} else {
	82	ie = NULL;
	83	ielen = 0;
	84	wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
	85	"(Re)AssocReq");
	86	}
	87
b5b969e9 JM	88	sta = ap_get_sta(hapd, addr);
	89	if (sta) {
	90	accounting_sta_stop(hapd, sta);
	91	} else {
	92	sta = ap_sta_add(hapd, addr);
	93	if (sta == NULL)
	94	return -1;
	95	}
	96	sta->flags &= ~(WLAN_STA_WPS \| WLAN_STA_MAYBE_WPS);
	97
b305c684 JM	98	#ifdef CONFIG_P2P
	99	if (elems.p2p) {
	100	wpabuf_free(sta->p2p_ie);
	101	sta->p2p_ie = ieee802_11_vendor_ie_concat(all_ies, all_ies_len,
	102	P2P_IE_VENDOR_TYPE);
	103	}
	104	#endif /* CONFIG_P2P */
	105
b5b969e9 JM	106	if (hapd->conf->wpa) {
	107	if (ie == NULL \|\| ielen == 0) {
	108	if (hapd->conf->wps_state) {
	109	wpa_printf(MSG_DEBUG, "STA did not include "
	110	"WPA/RSN IE in (Re)Association "
	111	"Request - possible WPS use");
	112	sta->flags \|= WLAN_STA_MAYBE_WPS;
	113	goto skip_wpa_check;
	114	}
	115
	116	wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
	117	return -1;
	118	}
	119	if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
	120	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	121	sta->flags \|= WLAN_STA_WPS;
	122	goto skip_wpa_check;
	123	}
	124
	125	if (sta->wpa_sm == NULL)
	126	sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
	127	sta->addr);
	128	if (sta->wpa_sm == NULL) {
	129	wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
	130	"machine");
	131	return -1;
	132	}
	133	res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
	134	ie, ielen, NULL, 0);
	135	if (res != WPA_IE_OK) {
355d36a7	136	int resp;
b5b969e9 JM	137	wpa_printf(MSG_DEBUG, "WPA/RSN information element "
	138	"rejected? (res %u)", res);
	139	wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
355d36a7 AT	140	if (res == WPA_INVALID_GROUP)
	141	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	142	else if (res == WPA_INVALID_PAIRWISE)
	143	resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
	144	else if (res == WPA_INVALID_AKMP)
	145	resp = WLAN_REASON_AKMP_NOT_VALID;
	146	#ifdef CONFIG_IEEE80211W
	147	else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
	148	resp = WLAN_REASON_INVALID_IE;
	149	else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
	150	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	151	#endif /* CONFIG_IEEE80211W */
	152	else
	153	resp = WLAN_REASON_INVALID_IE;
51e2a27a	154	hostapd_drv_sta_disassoc(hapd, sta->addr, resp);
355d36a7	155	ap_free_sta(hapd, sta);
b5b969e9 JM	156	return -1;
b5b969e9 JM	157	}
a9aca28b	158	} else if (hapd->conf->wps_state) {
54f489be JM	159	#ifdef CONFIG_WPS_STRICT
	160	struct wpabuf *wps;
	161	wps = ieee802_11_vendor_ie_concat(ie, ielen,
	162	WPS_IE_VENDOR_TYPE);
	163	if (wps && wps_validate_assoc_req(wps) < 0) {
51e2a27a JM	164	hostapd_drv_sta_disassoc(hapd, sta->addr,
51e2a27a JM	165	WLAN_REASON_INVALID_IE);
54f489be JM	166	ap_free_sta(hapd, sta);
	167	wpabuf_free(wps);
	168	return -1;
	169	}
	170	wpabuf_free(wps);
	171	#endif /* CONFIG_WPS_STRICT */
a9aca28b JM	172	if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
	173	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	174	sta->flags \|= WLAN_STA_WPS;
	175	} else
	176	sta->flags \|= WLAN_STA_MAYBE_WPS;
b5b969e9 JM	177	}
	178	skip_wpa_check:
	179
	180	new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
	181	sta->flags \|= WLAN_STA_AUTH \| WLAN_STA_ASSOC;
	182	wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
	183
	184	hostapd_new_assoc_sta(hapd, sta, !new_assoc);
	185
	186	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
	187
ef796391	188	#ifdef CONFIG_P2P
3f4ce13f JM	189	p2p_group_notif_assoc(hapd->p2p_group, sta->addr,
3f4ce13f JM	190	all_ies, all_ies_len);
ef796391 JM	191	#endif /* CONFIG_P2P */
ef796391 JM	192
b5b969e9 JM	193	return 0;
	194	}
	195
	196
	197	void hostapd_notif_disassoc(struct hostapd_data hapd, const u8 addr)
	198	{
	199	struct sta_info *sta;
	200
83e843e8 JM	201	if (addr == NULL) {
	202	/*
	203	* This could potentially happen with unexpected event from the
	204	* driver wrapper. This was seen at least in one case where the
	205	* driver ended up reporting a station mode event while hostapd
	206	* was running, so better make sure we stop processing such an
	207	* event here.
	208	*/
	209	wpa_printf(MSG_DEBUG, "hostapd_notif_disassoc: Skip event "
	210	"with no address");
1f4c7b6b	211	return;
83e843e8 JM	212	}
83e843e8 JM	213
b5b969e9 JM	214	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	215	HOSTAPD_LEVEL_INFO, "disassociated");
	216
	217	sta = ap_get_sta(hapd, addr);
	218	if (sta == NULL) {
	219	wpa_printf(MSG_DEBUG, "Disassociation notification for "
	220	"unknown STA " MACSTR, MAC2STR(addr));
	221	return;
	222	}
	223
	224	sta->flags &= ~(WLAN_STA_AUTH \| WLAN_STA_ASSOC);
9a3cb18d JM	225	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
9a3cb18d JM	226	MAC2STR(sta->addr));
b5b969e9 JM	227	wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
	228	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
	229	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
	230	ap_free_sta(hapd, sta);
	231	}
	232
	233
0d7e5a3a JB	234	void hostapd_event_sta_low_ack(struct hostapd_data hapd, const u8 addr)
	235	{
	236	struct sta_info *sta = ap_get_sta(hapd, addr);
	237
	238	if (!sta \|\| !hapd->conf->disassoc_low_ack)
	239	return;
	240
	241	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	242	HOSTAPD_LEVEL_INFO, "disconnected due to excessive "
	243	"missing ACKs");
	244	hostapd_drv_sta_disassoc(hapd, addr, WLAN_REASON_DISASSOC_LOW_ACK);
	245	if (sta)
	246	ap_sta_disassociate(hapd, sta, WLAN_REASON_DISASSOC_LOW_ACK);
	247	}
	248
	249
f8b1f695 JM	250	#ifdef HOSTAPD
f8b1f695 JM	251
fe6bdb77	252	#ifdef NEED_AP_MLME
f8b1f695 JM	253
	254	static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
	255	{
	256	u16 fc, type, stype;
	257
	258	/*
	259	* PS-Poll frames are 16 bytes. All other frames are
	260	* 24 bytes or longer.
	261	*/
	262	if (len < 16)
	263	return NULL;
	264
	265	fc = le_to_host16(hdr->frame_control);
	266	type = WLAN_FC_GET_TYPE(fc);
	267	stype = WLAN_FC_GET_STYPE(fc);
	268
	269	switch (type) {
	270	case WLAN_FC_TYPE_DATA:
	271	if (len < 24)
	272	return NULL;
	273	switch (fc & (WLAN_FC_FROMDS \| WLAN_FC_TODS)) {
fbbfcbac	274	case WLAN_FC_FROMDS \| WLAN_FC_TODS:
f8b1f695 JM	275	case WLAN_FC_TODS:
	276	return hdr->addr1;
	277	case WLAN_FC_FROMDS:
	278	return hdr->addr2;
	279	default:
	280	return NULL;
	281	}
	282	case WLAN_FC_TYPE_CTRL:
	283	if (stype != WLAN_FC_STYPE_PSPOLL)
	284	return NULL;
	285	return hdr->addr1;
	286	case WLAN_FC_TYPE_MGMT:
	287	return hdr->addr3;
	288	default:
	289	return NULL;
	290	}
	291	}
	292
	293
	294	#define HAPD_BROADCAST ((struct hostapd_data *) -1)
	295
	296	static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
	297	const u8 *bssid)
	298	{
	299	size_t i;
	300
	301	if (bssid == NULL)
	302	return NULL;
	303	if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
	304	bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
	305	return HAPD_BROADCAST;
	306
	307	for (i = 0; i < iface->num_bss; i++) {
	308	if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
	309	return iface->bss[i];
	310	}
	311
	312	return NULL;
	313	}
	314
	315
	316	static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
0d9fc3d8	317	const u8 *frame, size_t len)
f8b1f695	318	{
0d9fc3d8	319	const struct ieee80211_hdr hdr = (const struct ieee80211_hdr ) frame;
fbbfcbac	320	u16 fc = le_to_host16(hdr->frame_control);
f8b1f695 JM	321	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	322	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	323	return;
	324
fbbfcbac FF	325	ieee802_11_rx_from_unknown(hapd, hdr->addr2,
	326	(fc & (WLAN_FC_TODS \| WLAN_FC_FROMDS)) ==
	327	(WLAN_FC_TODS \| WLAN_FC_FROMDS));
f8b1f695 JM	328	}
	329
	330
2a8b7416	331	static void hostapd_mgmt_rx(struct hostapd_data hapd, struct rx_mgmt rx_mgmt)
b5b969e9	332	{
4b9841d3	333	struct hostapd_iface *iface = hapd->iface;
b57e086c	334	const struct ieee80211_hdr *hdr;
4b9841d3	335	const u8 *bssid;
2a8b7416	336	struct hostapd_frame_info fi;
4b9841d3	337
2a8b7416 JM	338	hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
2a8b7416 JM	339	bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
4b9841d3 JM	340	if (bssid == NULL)
	341	return;
	342
	343	hapd = get_hapd_bssid(iface, bssid);
	344	if (hapd == NULL) {
	345	u16 fc;
	346	fc = le_to_host16(hdr->frame_control);
	347
	348	/*
	349	* Drop frames to unknown BSSIDs except for Beacon frames which
	350	* could be used to update neighbor information.
	351	*/
	352	if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
	353	WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
	354	hapd = iface->bss[0];
	355	else
	356	return;
	357	}
	358
2a8b7416 JM	359	os_memset(&fi, 0, sizeof(fi));
	360	fi.datarate = rx_mgmt->datarate;
	361	fi.ssi_signal = rx_mgmt->ssi_signal;
	362
4b9841d3 JM	363	if (hapd == HAPD_BROADCAST) {
	364	size_t i;
	365	for (i = 0; i < iface->num_bss; i++)
2a8b7416 JM	366	ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
2a8b7416 JM	367	rx_mgmt->frame_len, &fi);
4b9841d3	368	} else
2a8b7416	369	ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi);
bbb921da JM	370
bbb921da JM	371	random_add_randomness(&fi, sizeof(fi));
b5b969e9 JM	372	}
	373
	374
f8b1f695 JM	375	static void hostapd_mgmt_tx_cb(struct hostapd_data hapd, const u8 buf,
f8b1f695 JM	376	size_t len, u16 stype, int ok)
b5b969e9	377	{
4b9841d3 JM	378	struct ieee80211_hdr *hdr;
	379	hdr = (struct ieee80211_hdr *) buf;
	380	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	381	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	382	return;
b5b969e9 JM	383	ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
b5b969e9 JM	384	}
f82ef4d8	385
f8b1f695	386	#endif /* NEED_AP_MLME */
ad1e68e6 JM	387
ad1e68e6 JM	388
a0e0d3bb JM	389	static int hostapd_probe_req_rx(struct hostapd_data hapd, const u8 sa,
	390	const u8 *ie, size_t ie_len)
	391	{
	392	size_t i;
	393	int ret = 0;
	394
bbb921da JM	395	if (sa)
bbb921da JM	396	random_add_randomness(sa, ETH_ALEN);
a0e0d3bb JM	397	for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
	398	if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
	399	sa, ie, ie_len) > 0) {
	400	ret = 1;
	401	break;
	402	}
	403	}
	404	return ret;
	405	}
	406
	407
a8e0505b JM	408	static int hostapd_event_new_sta(struct hostapd_data hapd, const u8 addr)
	409	{
	410	struct sta_info *sta = ap_get_sta(hapd, addr);
	411	if (sta)
	412	return 0;
	413
	414	wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
	415	" - adding a new STA", MAC2STR(addr));
	416	sta = ap_sta_add(hapd, addr);
	417	if (sta) {
	418	hostapd_new_assoc_sta(hapd, sta, 0);
	419	} else {
	420	wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
	421	MAC2STR(addr));
	422	return -1;
	423	}
	424
	425	return 0;
	426	}
	427
	428
	429	static void hostapd_event_eapol_rx(struct hostapd_data hapd, const u8 src,
	430	const u8 *data, size_t data_len)
	431	{
	432	struct hostapd_iface *iface = hapd->iface;
	433	size_t j;
	434
	435	for (j = 0; j < iface->num_bss; j++) {
	436	if (ap_get_sta(iface->bss[j], src)) {
	437	hapd = iface->bss[j];
	438	break;
	439	}
	440	}
	441
	442	ieee802_1x_receive(hapd, src, data, data_len);
	443	}
	444
	445
9646a8ab	446	void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
ad1e68e6 JM	447	union wpa_event_data *data)
	448	{
	449	struct hostapd_data *hapd = ctx;
	450
	451	switch (event) {
	452	case EVENT_MICHAEL_MIC_FAILURE:
	453	michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
	454	break;
	455	case EVENT_SCAN_RESULTS:
	456	if (hapd->iface->scan_cb)
	457	hapd->iface->scan_cb(hapd->iface);
	458	break;
08fd8c15	459	#ifdef CONFIG_IEEE80211R
f2dab64e	460	case EVENT_FT_RRB_RX:
08fd8c15 JM	461	wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
	462	data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
	463	break;
	464	#endif /* CONFIG_IEEE80211R */
fcf0f87d JM	465	case EVENT_WPS_BUTTON_PUSHED:
	466	hostapd_wps_button_pushed(hapd);
	467	break;
f8b1f695 JM	468	#ifdef NEED_AP_MLME
	469	case EVENT_TX_STATUS:
	470	switch (data->tx_status.type) {
	471	case WLAN_FC_TYPE_MGMT:
	472	hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
	473	data->tx_status.data_len,
	474	data->tx_status.stype,
	475	data->tx_status.ack);
	476	break;
	477	case WLAN_FC_TYPE_DATA:
	478	hostapd_tx_status(hapd, data->tx_status.dst,
	479	data->tx_status.data,
	480	data->tx_status.data_len,
	481	data->tx_status.ack);
	482	break;
	483	}
	484	break;
	485	case EVENT_RX_FROM_UNKNOWN:
0d9fc3d8	486	hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.frame,
f8b1f695 JM	487	data->rx_from_unknown.len);
	488	break;
	489	case EVENT_RX_MGMT:
2a8b7416	490	hostapd_mgmt_rx(hapd, &data->rx_mgmt);
f8b1f695 JM	491	break;
f8b1f695 JM	492	#endif /* NEED_AP_MLME */
a0e0d3bb JM	493	case EVENT_RX_PROBE_REQ:
	494	hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
	495	data->rx_probe_req.ie,
	496	data->rx_probe_req.ie_len);
	497	break;
a70a5d6d	498	case EVENT_NEW_STA:
a8e0505b JM	499	hostapd_event_new_sta(hapd, data->new_sta.addr);
	500	break;
	501	case EVENT_EAPOL_RX:
	502	hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
	503	data->eapol_rx.data,
	504	data->eapol_rx.data_len);
	505	break;
1d041bec JM	506	case EVENT_ASSOC:
	507	hostapd_notif_assoc(hapd, data->assoc_info.addr,
	508	data->assoc_info.req_ies,
	509	data->assoc_info.req_ies_len);
	510	break;
	511	case EVENT_DISASSOC:
	512	if (data)
	513	hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
	514	break;
	515	case EVENT_DEAUTH:
	516	if (data)
	517	hostapd_notif_disassoc(hapd, data->deauth_info.addr);
	518	break;
0d7e5a3a JB	519	case EVENT_STATION_LOW_ACK:
	520	if (!data)
	521	break;
	522	hostapd_event_sta_low_ack(hapd, data->low_ack.addr);
	523	break;
ad1e68e6 JM	524	default:
	525	wpa_printf(MSG_DEBUG, "Unknown event %d", event);
	526	break;
	527	}
	528	}
f8b1f695 JM	529
f8b1f695 JM	530	#endif /* HOSTAPD */