[thirdparty/hostap.git] / hostapd / 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 "includes.h"

#include "common.h"
#include "hostapd.h"
#include "driver_i.h"
#include "ieee802_11.h"
#include "radius/radius.h"
#include "sta_info.h"
#include "accounting.h"
#include "tkip_countermeasures.h"
#include "ieee802_1x.h"
#include "wpa.h"
#include "iapp.h"
#include "wme.h"
#include "wps_hostapd.h"


struct prune_data {
	struct hostapd_data *hapd;
	const u8 *addr;
};

static int prune_associations(struct hostapd_iface *iface, void *ctx)
{
	struct prune_data *data = ctx;
	struct sta_info *osta;
	struct hostapd_data *ohapd;
	size_t j;

	for (j = 0; j < iface->num_bss; j++) {
		ohapd = iface->bss[j];
		if (ohapd == data->hapd)
			continue;
		osta = ap_get_sta(ohapd, data->addr);
		if (!osta)
			continue;

		ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
	}

	return 0;
}

/**
 * hostapd_prune_associations - Remove extraneous associations
 * @hapd: Pointer to BSS data for the most recent association
 * @sta: Pointer to the associated STA data
 *
 * This function looks through all radios and BSS's for previous
 * (stale) associations of STA. If any are found they are removed.
 */
static void hostapd_prune_associations(struct hostapd_data *hapd,
				       struct sta_info *sta)
{
	struct prune_data data;
	data.hapd = hapd;
	data.addr = sta->addr;
	hostapd_for_each_interface(prune_associations, &data);
}


/**
 * hostapd_new_assoc_sta - Notify that a new station associated with the AP
 * @hapd: Pointer to BSS data
 * @sta: Pointer to the associated STA data
 * @reassoc: 1 to indicate this was a re-association; 0 = first association
 *
 * This function will be called whenever a station associates with the AP. It
 * can be called from ieee802_11.c for drivers that export MLME to hostapd and
 * from driver_*.c for drivers that take care of management frames (IEEE 802.11
 * authentication and association) internally.
 */
void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
			   int reassoc)
{
	if (hapd->tkip_countermeasures) {
		hostapd_sta_deauth(hapd, sta->addr,
				   WLAN_REASON_MICHAEL_MIC_FAILURE);
		return;
	}

	hostapd_prune_associations(hapd, sta);

	/* IEEE 802.11F (IAPP) */
	if (hapd->conf->ieee802_11f)
		iapp_new_station(hapd->iapp, sta);

	/* Start accounting here, if IEEE 802.1X and WPA are not used.
	 * IEEE 802.1X/WPA code will start accounting after the station has
	 * been authorized. */
	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
		accounting_sta_start(hapd, sta);

	/* Start IEEE 802.1X authentication process for new stations */
	ieee802_1x_new_station(hapd, sta);
	if (reassoc) {
		if (sta->auth_alg != WLAN_AUTH_FT &&
		    !(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
			wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
	} else
		wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
}


void hostapd_tx_status(struct hostapd_data *hapd, const u8 *addr,
		       const u8 *buf, size_t len, int ack)
{
	struct sta_info *sta;
	struct hostapd_iface *iface = hapd->iface;

	sta = ap_get_sta(hapd, addr);
	if (sta == NULL && iface->num_bss > 1) {
		size_t j;
		for (j = 0; j < iface->num_bss; j++) {
			hapd = iface->bss[j];
			sta = ap_get_sta(hapd, addr);
			if (sta)
				break;
		}
	}
	if (sta == NULL)
		return;
	if (sta->flags & WLAN_STA_PENDING_POLL) {
		wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
			   "activity poll", MAC2STR(sta->addr),
			   ack ? "ACKed" : "did not ACK");
		if (ack)
			sta->flags &= ~WLAN_STA_PENDING_POLL;
	}

	ieee802_1x_tx_status(hapd, sta, buf, len, ack);
}


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_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;
}


void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
				 const struct ieee80211_hdr *hdr, size_t len)
{
	struct sta_info *sta;
	const u8 *addr;

	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	if (hapd == NULL || hapd == HAPD_BROADCAST)
		return;

	addr = hdr->addr2;
	sta = ap_get_sta(hapd, addr);
	if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
		wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated "
			   "STA " MACSTR, MAC2STR(addr));
		if (sta && (sta->flags & WLAN_STA_AUTH))
			hostapd_sta_disassoc(
				hapd, addr,
				WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
		else
			hostapd_sta_deauth(
				hapd, addr,
				WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
	}
}


int hostapd_notif_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;
}


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;

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

	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;
			hostapd_sta_disassoc(hapd, sta->addr, resp);
			ap_free_sta(hapd, sta);
			return -1;
		}
	} else if (hapd->conf->wps_state) {
		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_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_eapol_receive(struct hostapd_data *hapd, const u8 *sa,
			   const u8 *buf, size_t len)
{
	ieee802_1x_receive(hapd, sa, buf, len);
}


#ifdef NEED_AP_MLME
void hostapd_mgmt_rx(struct hostapd_data *hapd, u8 *buf, size_t len,
		     u16 stype, struct hostapd_frame_info *fi)
{
	struct hostapd_iface *iface = hapd->iface;
	struct ieee80211_hdr *hdr;
	const u8 *bssid;

	hdr = (struct ieee80211_hdr *) buf;
	bssid = get_hdr_bssid(hdr, 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;
	}

	if (hapd == HAPD_BROADCAST) {
		size_t i;
		for (i = 0; i < iface->num_bss; i++)
			ieee802_11_mgmt(iface->bss[i], buf, len, stype, fi);
	} else
		ieee802_11_mgmt(hapd, buf, len, stype, fi);
}


void hostapd_mgmt_tx_cb(struct hostapd_data *hapd, 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 */


struct hostapd_data * hostapd_sta_get_bss(struct hostapd_data *hapd,
					  const u8 *addr)
{
	struct hostapd_iface *iface = hapd->iface;
	size_t j;

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

	return NULL;
}


#ifndef CONFIG_AP
void wpa_supplicant_event(void *ctx, 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;
	default:
		wpa_printf(MSG_DEBUG, "Unknown event %d", event);
		break;
	}
}
#endif /* CONFIG_AP */


void hostapd_probe_req_rx(struct hostapd_data *hapd, const u8 *sa,
			 const u8 *ie, size_t ie_len)
{
	size_t i;

	for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
		hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
					sa, ie, ie_len);
}
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
	15	#include "includes.h"
	16
4dbfe5c5	17	#include "common.h"
b5b969e9 JM	18	#include "hostapd.h"
	19	#include "driver_i.h"
	20	#include "ieee802_11.h"
	21	#include "radius/radius.h"
	22	#include "sta_info.h"
	23	#include "accounting.h"
	24	#include "tkip_countermeasures.h"
	25	#include "ieee802_1x.h"
	26	#include "wpa.h"
	27	#include "iapp.h"
	28	#include "wme.h"
3fed6f25	29	#include "wps_hostapd.h"
b5b969e9 JM	30
	31
	32	struct prune_data {
	33	struct hostapd_data *hapd;
	34	const u8 *addr;
	35	};
	36
	37	static int prune_associations(struct hostapd_iface iface, void ctx)
	38	{
	39	struct prune_data *data = ctx;
	40	struct sta_info *osta;
	41	struct hostapd_data *ohapd;
	42	size_t j;
	43
	44	for (j = 0; j < iface->num_bss; j++) {
	45	ohapd = iface->bss[j];
	46	if (ohapd == data->hapd)
	47	continue;
	48	osta = ap_get_sta(ohapd, data->addr);
	49	if (!osta)
	50	continue;
	51
	52	ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
	53	}
	54
	55	return 0;
	56	}
	57
	58	/**
	59	* hostapd_prune_associations - Remove extraneous associations
	60	* @hapd: Pointer to BSS data for the most recent association
	61	* @sta: Pointer to the associated STA data
	62	*
	63	* This function looks through all radios and BSS's for previous
	64	* (stale) associations of STA. If any are found they are removed.
	65	*/
	66	static void hostapd_prune_associations(struct hostapd_data *hapd,
	67	struct sta_info *sta)
	68	{
	69	struct prune_data data;
	70	data.hapd = hapd;
	71	data.addr = sta->addr;
	72	hostapd_for_each_interface(prune_associations, &data);
	73	}
	74
	75
	76	/**
	77	* hostapd_new_assoc_sta - Notify that a new station associated with the AP
	78	* @hapd: Pointer to BSS data
	79	* @sta: Pointer to the associated STA data
	80	* @reassoc: 1 to indicate this was a re-association; 0 = first association
	81	*
	82	* This function will be called whenever a station associates with the AP. It
	83	* can be called from ieee802_11.c for drivers that export MLME to hostapd and
	84	* from driver_*.c for drivers that take care of management frames (IEEE 802.11
	85	* authentication and association) internally.
	86	*/
	87	void hostapd_new_assoc_sta(struct hostapd_data hapd, struct sta_info sta,
	88	int reassoc)
	89	{
	90	if (hapd->tkip_countermeasures) {
	91	hostapd_sta_deauth(hapd, sta->addr,
	92	WLAN_REASON_MICHAEL_MIC_FAILURE);
	93	return;
94	}
95
96	hostapd_prune_associations(hapd, sta);
97
98	/* IEEE 802.11F (IAPP) */
99	if (hapd->conf->ieee802_11f)
100	iapp_new_station(hapd->iapp, sta);
101
102	/* Start accounting here, if IEEE 802.1X and WPA are not used.
103	* IEEE 802.1X/WPA code will start accounting after the station has
104	* been authorized. */
105	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
106	accounting_sta_start(hapd, sta);
107
b5b969e9 JM	108	/* Start IEEE 802.1X authentication process for new stations */
	109	ieee802_1x_new_station(hapd, sta);
	110	if (reassoc) {
	111	if (sta->auth_alg != WLAN_AUTH_FT &&
	112	!(sta->flags & (WLAN_STA_WPS \| WLAN_STA_MAYBE_WPS)))
	113	wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
	114	} else
	115	wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
	116	}
	117
	118
	119	void hostapd_tx_status(struct hostapd_data hapd, const u8 addr,
	120	const u8 *buf, size_t len, int ack)
	121	{
	122	struct sta_info *sta;
4b9841d3	123	struct hostapd_iface *iface = hapd->iface;
b5b969e9 JM	124
b5b969e9 JM	125	sta = ap_get_sta(hapd, addr);
4b9841d3 JM	126	if (sta == NULL && iface->num_bss > 1) {
	127	size_t j;
	128	for (j = 0; j < iface->num_bss; j++) {
	129	hapd = iface->bss[j];
	130	sta = ap_get_sta(hapd, addr);
	131	if (sta)
	132	break;
	133	}
	134	}
	135	if (sta == NULL)
	136	return;
	137	if (sta->flags & WLAN_STA_PENDING_POLL) {
b5b969e9 JM	138	wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
	139	"activity poll", MAC2STR(sta->addr),
	140	ack ? "ACKed" : "did not ACK");
	141	if (ack)
	142	sta->flags &= ~WLAN_STA_PENDING_POLL;
	143	}
4b9841d3 JM	144
	145	ieee802_1x_tx_status(hapd, sta, buf, len, ack);
	146	}
	147
	148
	149	static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
	150	{
	151	u16 fc, type, stype;
	152
	153	/*
	154	* PS-Poll frames are 16 bytes. All other frames are
	155	* 24 bytes or longer.
	156	*/
	157	if (len < 16)
	158	return NULL;
	159
	160	fc = le_to_host16(hdr->frame_control);
	161	type = WLAN_FC_GET_TYPE(fc);
	162	stype = WLAN_FC_GET_STYPE(fc);
	163
	164	switch (type) {
	165	case WLAN_FC_TYPE_DATA:
	166	if (len < 24)
	167	return NULL;
	168	switch (fc & (WLAN_FC_FROMDS \| WLAN_FC_TODS)) {
	169	case WLAN_FC_TODS:
	170	return hdr->addr1;
	171	case WLAN_FC_FROMDS:
	172	return hdr->addr2;
	173	default:
	174	return NULL;
	175	}
	176	case WLAN_FC_TYPE_CTRL:
	177	if (stype != WLAN_FC_STYPE_PSPOLL)
	178	return NULL;
	179	return hdr->addr1;
	180	case WLAN_FC_TYPE_MGMT:
	181	return hdr->addr3;
	182	default:
	183	return NULL;
	184	}
	185	}
	186
	187
	188	#define HAPD_BROADCAST ((struct hostapd_data *) -1)
	189
	190	static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
	191	const u8 *bssid)
	192	{
	193	size_t i;
	194
	195	if (bssid == NULL)
	196	return NULL;
	197	if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
	198	bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
	199	return HAPD_BROADCAST;
	200
	201	for (i = 0; i < iface->num_bss; i++) {
	202	if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
	203	return iface->bss[i];
	204	}
	205
	206	return NULL;
b5b969e9 JM	207	}
	208
	209
4b9841d3 JM	210	void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
4b9841d3 JM	211	const struct ieee80211_hdr *hdr, size_t len)
b5b969e9 JM	212	{
b5b969e9 JM	213	struct sta_info *sta;
4b9841d3 JM	214	const u8 *addr;
	215
	216	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	217	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	218	return;
b5b969e9	219
4b9841d3	220	addr = hdr->addr2;
b5b969e9 JM	221	sta = ap_get_sta(hapd, addr);
	222	if (!sta \|\| !(sta->flags & WLAN_STA_ASSOC)) {
	223	wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated "
	224	"STA " MACSTR, MAC2STR(addr));
	225	if (sta && (sta->flags & WLAN_STA_AUTH))
	226	hostapd_sta_disassoc(
	227	hapd, addr,
	228	WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
	229	else
	230	hostapd_sta_deauth(
	231	hapd, addr,
	232	WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
	233	}
	234	}
	235
	236
05310066 JM	237	int hostapd_notif_new_sta(struct hostapd_data hapd, const u8 addr)
	238	{
	239	struct sta_info *sta = ap_get_sta(hapd, addr);
	240	if (sta)
	241	return 0;
	242
	243	wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
	244	" - adding a new STA", MAC2STR(addr));
	245	sta = ap_sta_add(hapd, addr);
	246	if (sta) {
	247	hostapd_new_assoc_sta(hapd, sta, 0);
	248	} else {
	249	wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
	250	MAC2STR(addr));
	251	return -1;
	252	}
	253
	254	return 0;
	255	}
	256
	257
b5b969e9 JM	258	int hostapd_notif_assoc(struct hostapd_data hapd, const u8 addr,
	259	const u8 *ie, size_t ielen)
	260	{
	261	struct sta_info *sta;
	262	int new_assoc, res;
	263
	264	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	265	HOSTAPD_LEVEL_INFO, "associated");
	266
	267	sta = ap_get_sta(hapd, addr);
	268	if (sta) {
	269	accounting_sta_stop(hapd, sta);
	270	} else {
	271	sta = ap_sta_add(hapd, addr);
	272	if (sta == NULL)
	273	return -1;
	274	}
	275	sta->flags &= ~(WLAN_STA_WPS \| WLAN_STA_MAYBE_WPS);
	276
	277	if (hapd->conf->wpa) {
	278	if (ie == NULL \|\| ielen == 0) {
	279	if (hapd->conf->wps_state) {
	280	wpa_printf(MSG_DEBUG, "STA did not include "
	281	"WPA/RSN IE in (Re)Association "
	282	"Request - possible WPS use");
	283	sta->flags \|= WLAN_STA_MAYBE_WPS;
	284	goto skip_wpa_check;
	285	}
	286
	287	wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
	288	return -1;
	289	}
	290	if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
	291	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	292	sta->flags \|= WLAN_STA_WPS;
	293	goto skip_wpa_check;
	294	}
	295
	296	if (sta->wpa_sm == NULL)
	297	sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
	298	sta->addr);
	299	if (sta->wpa_sm == NULL) {
	300	wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
	301	"machine");
	302	return -1;
	303	}
	304	res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
	305	ie, ielen, NULL, 0);
	306	if (res != WPA_IE_OK) {
355d36a7	307	int resp;
b5b969e9 JM	308	wpa_printf(MSG_DEBUG, "WPA/RSN information element "
	309	"rejected? (res %u)", res);
	310	wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
355d36a7 AT	311	if (res == WPA_INVALID_GROUP)
	312	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	313	else if (res == WPA_INVALID_PAIRWISE)
	314	resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
	315	else if (res == WPA_INVALID_AKMP)
	316	resp = WLAN_REASON_AKMP_NOT_VALID;
	317	#ifdef CONFIG_IEEE80211W
	318	else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
	319	resp = WLAN_REASON_INVALID_IE;
	320	else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
	321	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	322	#endif /* CONFIG_IEEE80211W */
	323	else
	324	resp = WLAN_REASON_INVALID_IE;
	325	hostapd_sta_disassoc(hapd, sta->addr, resp);
	326	ap_free_sta(hapd, sta);
b5b969e9 JM	327	return -1;
b5b969e9 JM	328	}
a9aca28b JM	329	} else if (hapd->conf->wps_state) {
	330	if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
	331	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	332	sta->flags \|= WLAN_STA_WPS;
	333	} else
	334	sta->flags \|= WLAN_STA_MAYBE_WPS;
b5b969e9 JM	335	}
	336	skip_wpa_check:
	337
	338	new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
	339	sta->flags \|= WLAN_STA_AUTH \| WLAN_STA_ASSOC;
	340	wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
	341
	342	hostapd_new_assoc_sta(hapd, sta, !new_assoc);
	343
	344	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
	345
	346	return 0;
	347	}
	348
	349
	350	void hostapd_notif_disassoc(struct hostapd_data hapd, const u8 addr)
	351	{
	352	struct sta_info *sta;
	353
	354	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	355	HOSTAPD_LEVEL_INFO, "disassociated");
	356
	357	sta = ap_get_sta(hapd, addr);
	358	if (sta == NULL) {
	359	wpa_printf(MSG_DEBUG, "Disassociation notification for "
	360	"unknown STA " MACSTR, MAC2STR(addr));
	361	return;
	362	}
	363
	364	sta->flags &= ~(WLAN_STA_AUTH \| WLAN_STA_ASSOC);
	365	wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
	366	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
	367	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
	368	ap_free_sta(hapd, sta);
	369	}
	370
	371
	372	void hostapd_eapol_receive(struct hostapd_data hapd, const u8 sa,
	373	const u8 *buf, size_t len)
	374	{
	375	ieee802_1x_receive(hapd, sa, buf, len);
	376	}
	377
	378
fe6bdb77	379	#ifdef NEED_AP_MLME
b5b969e9 JM	380	void hostapd_mgmt_rx(struct hostapd_data hapd, u8 buf, size_t len,
	381	u16 stype, struct hostapd_frame_info *fi)
	382	{
4b9841d3 JM	383	struct hostapd_iface *iface = hapd->iface;
	384	struct ieee80211_hdr *hdr;
	385	const u8 *bssid;
	386
	387	hdr = (struct ieee80211_hdr *) buf;
	388	bssid = get_hdr_bssid(hdr, len);
	389	if (bssid == NULL)
	390	return;
	391
	392	hapd = get_hapd_bssid(iface, bssid);
	393	if (hapd == NULL) {
	394	u16 fc;
	395	fc = le_to_host16(hdr->frame_control);
	396
	397	/*
	398	* Drop frames to unknown BSSIDs except for Beacon frames which
	399	* could be used to update neighbor information.
	400	*/
	401	if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
	402	WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
	403	hapd = iface->bss[0];
	404	else
	405	return;
	406	}
	407
	408	if (hapd == HAPD_BROADCAST) {
	409	size_t i;
	410	for (i = 0; i < iface->num_bss; i++)
	411	ieee802_11_mgmt(iface->bss[i], buf, len, stype, fi);
	412	} else
	413	ieee802_11_mgmt(hapd, buf, len, stype, fi);
b5b969e9 JM	414	}
	415
	416
	417	void hostapd_mgmt_tx_cb(struct hostapd_data hapd, u8 buf, size_t len,
	418	u16 stype, int ok)
	419	{
4b9841d3 JM	420	struct ieee80211_hdr *hdr;
	421	hdr = (struct ieee80211_hdr *) buf;
	422	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	423	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	424	return;
b5b969e9 JM	425	ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
b5b969e9 JM	426	}
fe6bdb77	427	#endif /* NEED_AP_MLME */
b5b969e9 JM	428
b5b969e9 JM	429
f82ef4d8 JM	430	struct hostapd_data * hostapd_sta_get_bss(struct hostapd_data *hapd,
	431	const u8 *addr)
	432	{
	433	struct hostapd_iface *iface = hapd->iface;
	434	size_t j;
	435
	436	for (j = 0; j < iface->num_bss; j++) {
	437	hapd = iface->bss[j];
	438	if (ap_get_sta(hapd, addr))
	439	return hapd;
	440	}
	441
	442	return NULL;
	443	}
ad1e68e6 JM	444
	445
	446	#ifndef CONFIG_AP
	447	void wpa_supplicant_event(void *ctx, wpa_event_type event,
	448	union wpa_event_data *data)
	449	{
	450	struct hostapd_data *hapd = ctx;
	451
	452	switch (event) {
	453	case EVENT_MICHAEL_MIC_FAILURE:
	454	michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
	455	break;
	456	case EVENT_SCAN_RESULTS:
	457	if (hapd->iface->scan_cb)
	458	hapd->iface->scan_cb(hapd->iface);
	459	break;
08fd8c15	460	#ifdef CONFIG_IEEE80211R
f2dab64e	461	case EVENT_FT_RRB_RX:
08fd8c15 JM	462	wpa_ft_rrb_rx(hapd->wpa_auth, data->ft_rrb_rx.src,
	463	data->ft_rrb_rx.data, data->ft_rrb_rx.data_len);
	464	break;
	465	#endif /* CONFIG_IEEE80211R */
fcf0f87d JM	466	case EVENT_WPS_BUTTON_PUSHED:
	467	hostapd_wps_button_pushed(hapd);
	468	break;
ad1e68e6 JM	469	default:
	470	wpa_printf(MSG_DEBUG, "Unknown event %d", event);
	471	break;
	472	}
	473	}
	474	#endif /* CONFIG_AP */
3fed6f25 JM	475
	476
	477	void hostapd_probe_req_rx(struct hostapd_data hapd, const u8 sa,
	478	const u8 *ie, size_t ie_len)
	479	{
fa16028d JM	480	size_t i;
	481
	482	for (i = 0; hapd->probereq_cb && i < hapd->num_probereq_cb; i++)
	483	hapd->probereq_cb[i].cb(hapd->probereq_cb[i].ctx,
	484	sa, ie, ie_len);
3fed6f25	485	}