[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 "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_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;

	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;
	}

	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);

	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;
			hapd->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) {
			hapd->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);

	return 0;
}


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

	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);
}


#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);
}


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;

	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;
	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"
54f489be	23	#include "wps/wps.h"
6226e38d JM	24	#include "hostapd.h"
	25	#include "ieee802_11.h"
	26	#include "sta_info.h"
	27	#include "accounting.h"
	28	#include "tkip_countermeasures.h"
	29	#include "iapp.h"
	30	#include "ieee802_1x.h"
	31	#include "wpa_auth.h"
	32	#include "wmm.h"
	33	#include "wps_hostapd.h"
8b06c1ed	34	#include "ap_config.h"
b5b969e9 JM	35
b5b969e9 JM	36
b5b969e9 JM	37	int hostapd_notif_assoc(struct hostapd_data hapd, const u8 addr,
	38	const u8 *ie, size_t ielen)
	39	{
	40	struct sta_info *sta;
	41	int new_assoc, res;
c41a1095	42	struct ieee802_11_elems elems;
b5b969e9	43
68532a9c JM	44	if (addr == NULL) {
	45	/*
	46	* This could potentially happen with unexpected event from the
	47	* driver wrapper. This was seen at least in one case where the
	48	* driver ended up being set to station mode while hostapd was
	49	* running, so better make sure we stop processing such an
	50	* event here.
	51	*/
	52	wpa_printf(MSG_DEBUG, "hostapd_notif_assoc: Skip event with "
	53	"no address");
	54	return -1;
	55	}
	56
b5b969e9 JM	57	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	58	HOSTAPD_LEVEL_INFO, "associated");
	59
c41a1095 JM	60	ieee802_11_parse_elems(ie, ielen, &elems, 0);
	61	if (elems.wps_ie) {
	62	ie = elems.wps_ie - 2;
	63	ielen = elems.wps_ie_len + 2;
	64	wpa_printf(MSG_DEBUG, "STA included WPS IE in (Re)AssocReq");
	65	} else if (elems.rsn_ie) {
	66	ie = elems.rsn_ie - 2;
	67	ielen = elems.rsn_ie_len + 2;
	68	wpa_printf(MSG_DEBUG, "STA included RSN IE in (Re)AssocReq");
	69	} else if (elems.wpa_ie) {
	70	ie = elems.wpa_ie - 2;
	71	ielen = elems.wpa_ie_len + 2;
	72	wpa_printf(MSG_DEBUG, "STA included WPA IE in (Re)AssocReq");
	73	} else {
	74	ie = NULL;
	75	ielen = 0;
	76	wpa_printf(MSG_DEBUG, "STA did not include WPS/RSN/WPA IE in "
	77	"(Re)AssocReq");
	78	}
	79
b5b969e9 JM	80	sta = ap_get_sta(hapd, addr);
	81	if (sta) {
	82	accounting_sta_stop(hapd, sta);
	83	} else {
	84	sta = ap_sta_add(hapd, addr);
	85	if (sta == NULL)
	86	return -1;
	87	}
	88	sta->flags &= ~(WLAN_STA_WPS \| WLAN_STA_MAYBE_WPS);
	89
	90	if (hapd->conf->wpa) {
	91	if (ie == NULL \|\| ielen == 0) {
	92	if (hapd->conf->wps_state) {
	93	wpa_printf(MSG_DEBUG, "STA did not include "
	94	"WPA/RSN IE in (Re)Association "
	95	"Request - possible WPS use");
	96	sta->flags \|= WLAN_STA_MAYBE_WPS;
	97	goto skip_wpa_check;
	98	}
	99
	100	wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
	101	return -1;
	102	}
	103	if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
	104	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	105	sta->flags \|= WLAN_STA_WPS;
	106	goto skip_wpa_check;
	107	}
	108
	109	if (sta->wpa_sm == NULL)
	110	sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
	111	sta->addr);
	112	if (sta->wpa_sm == NULL) {
	113	wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
	114	"machine");
	115	return -1;
	116	}
	117	res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
	118	ie, ielen, NULL, 0);
	119	if (res != WPA_IE_OK) {
355d36a7	120	int resp;
b5b969e9 JM	121	wpa_printf(MSG_DEBUG, "WPA/RSN information element "
	122	"rejected? (res %u)", res);
	123	wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
355d36a7 AT	124	if (res == WPA_INVALID_GROUP)
	125	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	126	else if (res == WPA_INVALID_PAIRWISE)
	127	resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
	128	else if (res == WPA_INVALID_AKMP)
	129	resp = WLAN_REASON_AKMP_NOT_VALID;
	130	#ifdef CONFIG_IEEE80211W
	131	else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
	132	resp = WLAN_REASON_INVALID_IE;
	133	else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
	134	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	135	#endif /* CONFIG_IEEE80211W */
	136	else
	137	resp = WLAN_REASON_INVALID_IE;
bdee6fce	138	hapd->drv.sta_disassoc(hapd, sta->addr, resp);
355d36a7	139	ap_free_sta(hapd, sta);
b5b969e9 JM	140	return -1;
b5b969e9 JM	141	}
a9aca28b	142	} else if (hapd->conf->wps_state) {
54f489be JM	143	#ifdef CONFIG_WPS_STRICT
	144	struct wpabuf *wps;
	145	wps = ieee802_11_vendor_ie_concat(ie, ielen,
	146	WPS_IE_VENDOR_TYPE);
	147	if (wps && wps_validate_assoc_req(wps) < 0) {
	148	hapd->drv.sta_disassoc(hapd, sta->addr,
	149	WLAN_REASON_INVALID_IE);
	150	ap_free_sta(hapd, sta);
	151	wpabuf_free(wps);
	152	return -1;
	153	}
	154	wpabuf_free(wps);
	155	#endif /* CONFIG_WPS_STRICT */
a9aca28b JM	156	if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
	157	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	158	sta->flags \|= WLAN_STA_WPS;
	159	} else
	160	sta->flags \|= WLAN_STA_MAYBE_WPS;
b5b969e9 JM	161	}
	162	skip_wpa_check:
	163
	164	new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
	165	sta->flags \|= WLAN_STA_AUTH \| WLAN_STA_ASSOC;
	166	wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
	167
	168	hostapd_new_assoc_sta(hapd, sta, !new_assoc);
	169
	170	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
	171
	172	return 0;
	173	}
	174
	175
	176	void hostapd_notif_disassoc(struct hostapd_data hapd, const u8 addr)
	177	{
	178	struct sta_info *sta;
	179
	180	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	181	HOSTAPD_LEVEL_INFO, "disassociated");
	182
	183	sta = ap_get_sta(hapd, addr);
	184	if (sta == NULL) {
	185	wpa_printf(MSG_DEBUG, "Disassociation notification for "
	186	"unknown STA " MACSTR, MAC2STR(addr));
	187	return;
	188	}
	189
	190	sta->flags &= ~(WLAN_STA_AUTH \| WLAN_STA_ASSOC);
9a3cb18d JM	191	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_STA_DISCONNECTED MACSTR,
9a3cb18d JM	192	MAC2STR(sta->addr));
b5b969e9 JM	193	wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
	194	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
	195	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
	196	ap_free_sta(hapd, sta);
	197	}
	198
	199
f8b1f695 JM	200	#ifdef HOSTAPD
f8b1f695 JM	201
fe6bdb77	202	#ifdef NEED_AP_MLME
f8b1f695 JM	203
	204	static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
	205	{
	206	u16 fc, type, stype;
	207
	208	/*
	209	* PS-Poll frames are 16 bytes. All other frames are
	210	* 24 bytes or longer.
	211	*/
	212	if (len < 16)
	213	return NULL;
	214
	215	fc = le_to_host16(hdr->frame_control);
	216	type = WLAN_FC_GET_TYPE(fc);
	217	stype = WLAN_FC_GET_STYPE(fc);
	218
	219	switch (type) {
	220	case WLAN_FC_TYPE_DATA:
	221	if (len < 24)
	222	return NULL;
	223	switch (fc & (WLAN_FC_FROMDS \| WLAN_FC_TODS)) {
fbbfcbac	224	case WLAN_FC_FROMDS \| WLAN_FC_TODS:
f8b1f695 JM	225	case WLAN_FC_TODS:
	226	return hdr->addr1;
	227	case WLAN_FC_FROMDS:
	228	return hdr->addr2;
	229	default:
	230	return NULL;
	231	}
	232	case WLAN_FC_TYPE_CTRL:
	233	if (stype != WLAN_FC_STYPE_PSPOLL)
	234	return NULL;
	235	return hdr->addr1;
	236	case WLAN_FC_TYPE_MGMT:
	237	return hdr->addr3;
	238	default:
	239	return NULL;
	240	}
	241	}
	242
	243
	244	#define HAPD_BROADCAST ((struct hostapd_data *) -1)
	245
	246	static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
	247	const u8 *bssid)
	248	{
	249	size_t i;
	250
	251	if (bssid == NULL)
	252	return NULL;
	253	if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
	254	bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
	255	return HAPD_BROADCAST;
	256
	257	for (i = 0; i < iface->num_bss; i++) {
	258	if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
	259	return iface->bss[i];
	260	}
	261
	262	return NULL;
	263	}
	264
	265
	266	static void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
0d9fc3d8	267	const u8 *frame, size_t len)
f8b1f695	268	{
0d9fc3d8	269	const struct ieee80211_hdr hdr = (const struct ieee80211_hdr ) frame;
fbbfcbac	270	u16 fc = le_to_host16(hdr->frame_control);
f8b1f695 JM	271	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	272	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	273	return;
	274
fbbfcbac FF	275	ieee802_11_rx_from_unknown(hapd, hdr->addr2,
	276	(fc & (WLAN_FC_TODS \| WLAN_FC_FROMDS)) ==
	277	(WLAN_FC_TODS \| WLAN_FC_FROMDS));
f8b1f695 JM	278	}
	279
	280
2a8b7416	281	static void hostapd_mgmt_rx(struct hostapd_data hapd, struct rx_mgmt rx_mgmt)
b5b969e9	282	{
4b9841d3	283	struct hostapd_iface *iface = hapd->iface;
b57e086c	284	const struct ieee80211_hdr *hdr;
4b9841d3	285	const u8 *bssid;
2a8b7416	286	struct hostapd_frame_info fi;
4b9841d3	287
2a8b7416 JM	288	hdr = (const struct ieee80211_hdr *) rx_mgmt->frame;
2a8b7416 JM	289	bssid = get_hdr_bssid(hdr, rx_mgmt->frame_len);
4b9841d3 JM	290	if (bssid == NULL)
	291	return;
	292
	293	hapd = get_hapd_bssid(iface, bssid);
	294	if (hapd == NULL) {
	295	u16 fc;
	296	fc = le_to_host16(hdr->frame_control);
	297
	298	/*
	299	* Drop frames to unknown BSSIDs except for Beacon frames which
	300	* could be used to update neighbor information.
	301	*/
	302	if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
	303	WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
	304	hapd = iface->bss[0];
	305	else
	306	return;
	307	}
	308
2a8b7416 JM	309	os_memset(&fi, 0, sizeof(fi));
	310	fi.datarate = rx_mgmt->datarate;
	311	fi.ssi_signal = rx_mgmt->ssi_signal;
	312
4b9841d3 JM	313	if (hapd == HAPD_BROADCAST) {
	314	size_t i;
	315	for (i = 0; i < iface->num_bss; i++)
2a8b7416 JM	316	ieee802_11_mgmt(iface->bss[i], rx_mgmt->frame,
2a8b7416 JM	317	rx_mgmt->frame_len, &fi);
4b9841d3	318	} else
2a8b7416	319	ieee802_11_mgmt(hapd, rx_mgmt->frame, rx_mgmt->frame_len, &fi);
b5b969e9 JM	320	}
	321
	322
f8b1f695 JM	323	static void hostapd_mgmt_tx_cb(struct hostapd_data hapd, const u8 buf,
f8b1f695 JM	324	size_t len, u16 stype, int ok)
b5b969e9	325	{
4b9841d3 JM	326	struct ieee80211_hdr *hdr;
	327	hdr = (struct ieee80211_hdr *) buf;
	328	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	329	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	330	return;
b5b969e9 JM	331	ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
b5b969e9 JM	332	}
f82ef4d8	333
f8b1f695	334	#endif /* NEED_AP_MLME */
ad1e68e6 JM	335
ad1e68e6 JM	336
a0e0d3bb JM	337	static int hostapd_probe_req_rx(struct hostapd_data hapd, const u8 sa,
	338	const u8 *ie, size_t ie_len)
	339	{
	340	size_t i;
	341	int ret = 0;
	342
	343	for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++) {
	344	if (hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
	345	sa, ie, ie_len) > 0) {
	346	ret = 1;
	347	break;
	348	}
	349	}
	350	return ret;
	351	}
	352
	353
a8e0505b JM	354	static int hostapd_event_new_sta(struct hostapd_data hapd, const u8 addr)
	355	{
	356	struct sta_info *sta = ap_get_sta(hapd, addr);
	357	if (sta)
	358	return 0;
	359
	360	wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
	361	" - adding a new STA", MAC2STR(addr));
	362	sta = ap_sta_add(hapd, addr);
	363	if (sta) {
	364	hostapd_new_assoc_sta(hapd, sta, 0);
	365	} else {
	366	wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
	367	MAC2STR(addr));
	368	return -1;
	369	}
	370
	371	return 0;
	372	}
	373
	374
	375	static void hostapd_event_eapol_rx(struct hostapd_data hapd, const u8 src,
	376	const u8 *data, size_t data_len)
	377	{
	378	struct hostapd_iface *iface = hapd->iface;
	379	size_t j;
	380
	381	for (j = 0; j < iface->num_bss; j++) {
	382	if (ap_get_sta(iface->bss[j], src)) {
	383	hapd = iface->bss[j];
	384	break;
	385	}
	386	}
	387
	388	ieee802_1x_receive(hapd, src, data, data_len);
	389	}
	390
	391
9646a8ab	392	void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
ad1e68e6 JM	393	union wpa_event_data *data)
	394	{
	395	struct hostapd_data *hapd = ctx;
	396
	397	switch (event) {
	398	case EVENT_MICHAEL_MIC_FAILURE:
	399	michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
	400	break;
	401	case EVENT_SCAN_RESULTS:
	402	if (hapd->iface->scan_cb)
	403	hapd->iface->scan_cb(hapd->iface);
	404	break;
08fd8c15	405	#ifdef CONFIG_IEEE80211R
f2dab64e	406	case EVENT_FT_RRB_RX:
08fd8c15 JM	407	wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
	408	data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
	409	break;
	410	#endif /* CONFIG_IEEE80211R */
fcf0f87d JM	411	case EVENT_WPS_BUTTON_PUSHED:
	412	hostapd_wps_button_pushed(hapd);
	413	break;
f8b1f695 JM	414	#ifdef NEED_AP_MLME
	415	case EVENT_TX_STATUS:
	416	switch (data->tx_status.type) {
	417	case WLAN_FC_TYPE_MGMT:
	418	hostapd_mgmt_tx_cb(hapd, data->tx_status.data,
	419	data->tx_status.data_len,
	420	data->tx_status.stype,
	421	data->tx_status.ack);
	422	break;
	423	case WLAN_FC_TYPE_DATA:
	424	hostapd_tx_status(hapd, data->tx_status.dst,
	425	data->tx_status.data,
	426	data->tx_status.data_len,
	427	data->tx_status.ack);
	428	break;
	429	}
	430	break;
	431	case EVENT_RX_FROM_UNKNOWN:
0d9fc3d8	432	hostapd_rx_from_unknown_sta(hapd, data->rx_from_unknown.frame,
f8b1f695 JM	433	data->rx_from_unknown.len);
	434	break;
	435	case EVENT_RX_MGMT:
2a8b7416	436	hostapd_mgmt_rx(hapd, &data->rx_mgmt);
f8b1f695 JM	437	break;
f8b1f695 JM	438	#endif /* NEED_AP_MLME */
a0e0d3bb JM	439	case EVENT_RX_PROBE_REQ:
	440	hostapd_probe_req_rx(hapd, data->rx_probe_req.sa,
	441	data->rx_probe_req.ie,
	442	data->rx_probe_req.ie_len);
	443	break;
a70a5d6d	444	case EVENT_NEW_STA:
a8e0505b JM	445	hostapd_event_new_sta(hapd, data->new_sta.addr);
	446	break;
	447	case EVENT_EAPOL_RX:
	448	hostapd_event_eapol_rx(hapd, data->eapol_rx.src,
	449	data->eapol_rx.data,
	450	data->eapol_rx.data_len);
	451	break;
1d041bec JM	452	case EVENT_ASSOC:
	453	hostapd_notif_assoc(hapd, data->assoc_info.addr,
	454	data->assoc_info.req_ies,
	455	data->assoc_info.req_ies_len);
	456	break;
	457	case EVENT_DISASSOC:
	458	if (data)
	459	hostapd_notif_disassoc(hapd, data->disassoc_info.addr);
	460	break;
	461	case EVENT_DEAUTH:
	462	if (data)
	463	hostapd_notif_disassoc(hapd, data->deauth_info.addr);
	464	break;
ad1e68e6 JM	465	default:
	466	wpa_printf(MSG_DEBUG, "Unknown event %d", event);
	467	break;
	468	}
	469	}
f8b1f695 JM	470
f8b1f695 JM	471	#endif /* HOSTAPD */