[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_flags.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);

	hostapd_wmm_sta_config(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 */


void hostapd_michael_mic_failure(struct hostapd_data *hapd, const u8 *addr)
{
	michael_mic_failure(hapd, addr, 1);
}


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;
	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);
}


void hostapd_button_pushed(struct hostapd_data *hapd)
{
	hostapd_wps_button_pushed(hapd);
}
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"
bcd154c3	22	#include "sta_flags.h"
b5b969e9 JM	23	#include "sta_info.h"
	24	#include "accounting.h"
	25	#include "tkip_countermeasures.h"
	26	#include "ieee802_1x.h"
	27	#include "wpa.h"
	28	#include "iapp.h"
	29	#include "wme.h"
3fed6f25	30	#include "wps_hostapd.h"
b5b969e9 JM	31
	32
	33	struct prune_data {
	34	struct hostapd_data *hapd;
	35	const u8 *addr;
	36	};
	37
	38	static int prune_associations(struct hostapd_iface iface, void ctx)
	39	{
	40	struct prune_data *data = ctx;
	41	struct sta_info *osta;
	42	struct hostapd_data *ohapd;
	43	size_t j;
	44
	45	for (j = 0; j < iface->num_bss; j++) {
	46	ohapd = iface->bss[j];
	47	if (ohapd == data->hapd)
	48	continue;
	49	osta = ap_get_sta(ohapd, data->addr);
	50	if (!osta)
	51	continue;
	52
	53	ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
	54	}
	55
	56	return 0;
	57	}
	58
	59	/**
	60	* hostapd_prune_associations - Remove extraneous associations
	61	* @hapd: Pointer to BSS data for the most recent association
	62	* @sta: Pointer to the associated STA data
	63	*
	64	* This function looks through all radios and BSS's for previous
	65	* (stale) associations of STA. If any are found they are removed.
	66	*/
	67	static void hostapd_prune_associations(struct hostapd_data *hapd,
	68	struct sta_info *sta)
	69	{
	70	struct prune_data data;
	71	data.hapd = hapd;
	72	data.addr = sta->addr;
	73	hostapd_for_each_interface(prune_associations, &data);
	74	}
	75
	76
	77	/**
	78	* hostapd_new_assoc_sta - Notify that a new station associated with the AP
	79	* @hapd: Pointer to BSS data
	80	* @sta: Pointer to the associated STA data
	81	* @reassoc: 1 to indicate this was a re-association; 0 = first association
	82	*
	83	* This function will be called whenever a station associates with the AP. It
	84	* can be called from ieee802_11.c for drivers that export MLME to hostapd and
	85	* from driver_*.c for drivers that take care of management frames (IEEE 802.11
	86	* authentication and association) internally.
	87	*/
	88	void hostapd_new_assoc_sta(struct hostapd_data hapd, struct sta_info sta,
	89	int reassoc)
	90	{
	91	if (hapd->tkip_countermeasures) {
	92	hostapd_sta_deauth(hapd, sta->addr,
	93	WLAN_REASON_MICHAEL_MIC_FAILURE);
	94	return;
95	}
96
97	hostapd_prune_associations(hapd, sta);
98
99	/* IEEE 802.11F (IAPP) */
100	if (hapd->conf->ieee802_11f)
101	iapp_new_station(hapd->iapp, sta);
102
103	/* Start accounting here, if IEEE 802.1X and WPA are not used.
104	* IEEE 802.1X/WPA code will start accounting after the station has
105	* been authorized. */
106	if (!hapd->conf->ieee802_1x && !hapd->conf->wpa)
107	accounting_sta_start(hapd, sta);
108
3ae0800c	109	hostapd_wmm_sta_config(hapd, sta);
b5b969e9 JM	110
	111	/* Start IEEE 802.1X authentication process for new stations */
	112	ieee802_1x_new_station(hapd, sta);
	113	if (reassoc) {
	114	if (sta->auth_alg != WLAN_AUTH_FT &&
	115	!(sta->flags & (WLAN_STA_WPS \| WLAN_STA_MAYBE_WPS)))
	116	wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
	117	} else
	118	wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
	119	}
	120
	121
	122	void hostapd_tx_status(struct hostapd_data hapd, const u8 addr,
	123	const u8 *buf, size_t len, int ack)
	124	{
	125	struct sta_info *sta;
4b9841d3	126	struct hostapd_iface *iface = hapd->iface;
b5b969e9 JM	127
b5b969e9 JM	128	sta = ap_get_sta(hapd, addr);
4b9841d3 JM	129	if (sta == NULL && iface->num_bss > 1) {
	130	size_t j;
	131	for (j = 0; j < iface->num_bss; j++) {
	132	hapd = iface->bss[j];
	133	sta = ap_get_sta(hapd, addr);
	134	if (sta)
	135	break;
	136	}
	137	}
	138	if (sta == NULL)
	139	return;
	140	if (sta->flags & WLAN_STA_PENDING_POLL) {
b5b969e9 JM	141	wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
	142	"activity poll", MAC2STR(sta->addr),
	143	ack ? "ACKed" : "did not ACK");
	144	if (ack)
	145	sta->flags &= ~WLAN_STA_PENDING_POLL;
	146	}
4b9841d3 JM	147
	148	ieee802_1x_tx_status(hapd, sta, buf, len, ack);
	149	}
	150
	151
	152	static const u8 * get_hdr_bssid(const struct ieee80211_hdr *hdr, size_t len)
	153	{
	154	u16 fc, type, stype;
	155
	156	/*
	157	* PS-Poll frames are 16 bytes. All other frames are
	158	* 24 bytes or longer.
	159	*/
	160	if (len < 16)
	161	return NULL;
	162
	163	fc = le_to_host16(hdr->frame_control);
	164	type = WLAN_FC_GET_TYPE(fc);
	165	stype = WLAN_FC_GET_STYPE(fc);
	166
	167	switch (type) {
	168	case WLAN_FC_TYPE_DATA:
	169	if (len < 24)
	170	return NULL;
	171	switch (fc & (WLAN_FC_FROMDS \| WLAN_FC_TODS)) {
	172	case WLAN_FC_TODS:
	173	return hdr->addr1;
	174	case WLAN_FC_FROMDS:
	175	return hdr->addr2;
	176	default:
	177	return NULL;
	178	}
	179	case WLAN_FC_TYPE_CTRL:
	180	if (stype != WLAN_FC_STYPE_PSPOLL)
	181	return NULL;
	182	return hdr->addr1;
	183	case WLAN_FC_TYPE_MGMT:
	184	return hdr->addr3;
	185	default:
	186	return NULL;
	187	}
	188	}
	189
	190
	191	#define HAPD_BROADCAST ((struct hostapd_data *) -1)
	192
	193	static struct hostapd_data * get_hapd_bssid(struct hostapd_iface *iface,
	194	const u8 *bssid)
	195	{
	196	size_t i;
	197
	198	if (bssid == NULL)
	199	return NULL;
	200	if (bssid[0] == 0xff && bssid[1] == 0xff && bssid[2] == 0xff &&
	201	bssid[3] == 0xff && bssid[4] == 0xff && bssid[5] == 0xff)
	202	return HAPD_BROADCAST;
	203
	204	for (i = 0; i < iface->num_bss; i++) {
	205	if (os_memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0)
	206	return iface->bss[i];
	207	}
	208
	209	return NULL;
b5b969e9 JM	210	}
	211
	212
4b9841d3 JM	213	void hostapd_rx_from_unknown_sta(struct hostapd_data *hapd,
4b9841d3 JM	214	const struct ieee80211_hdr *hdr, size_t len)
b5b969e9 JM	215	{
b5b969e9 JM	216	struct sta_info *sta;
4b9841d3 JM	217	const u8 *addr;
	218
	219	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	220	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	221	return;
b5b969e9	222
4b9841d3	223	addr = hdr->addr2;
b5b969e9 JM	224	sta = ap_get_sta(hapd, addr);
	225	if (!sta \|\| !(sta->flags & WLAN_STA_ASSOC)) {
	226	wpa_printf(MSG_DEBUG, "Data/PS-poll frame from not associated "
	227	"STA " MACSTR, MAC2STR(addr));
	228	if (sta && (sta->flags & WLAN_STA_AUTH))
	229	hostapd_sta_disassoc(
	230	hapd, addr,
	231	WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
	232	else
	233	hostapd_sta_deauth(
	234	hapd, addr,
	235	WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
	236	}
	237	}
	238
	239
05310066 JM	240	int hostapd_notif_new_sta(struct hostapd_data hapd, const u8 addr)
	241	{
	242	struct sta_info *sta = ap_get_sta(hapd, addr);
	243	if (sta)
	244	return 0;
	245
	246	wpa_printf(MSG_DEBUG, "Data frame from unknown STA " MACSTR
	247	" - adding a new STA", MAC2STR(addr));
	248	sta = ap_sta_add(hapd, addr);
	249	if (sta) {
	250	hostapd_new_assoc_sta(hapd, sta, 0);
	251	} else {
	252	wpa_printf(MSG_DEBUG, "Failed to add STA entry for " MACSTR,
	253	MAC2STR(addr));
	254	return -1;
	255	}
	256
	257	return 0;
	258	}
	259
	260
b5b969e9 JM	261	int hostapd_notif_assoc(struct hostapd_data hapd, const u8 addr,
	262	const u8 *ie, size_t ielen)
	263	{
	264	struct sta_info *sta;
	265	int new_assoc, res;
	266
	267	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	268	HOSTAPD_LEVEL_INFO, "associated");
	269
	270	sta = ap_get_sta(hapd, addr);
	271	if (sta) {
	272	accounting_sta_stop(hapd, sta);
	273	} else {
	274	sta = ap_sta_add(hapd, addr);
	275	if (sta == NULL)
	276	return -1;
	277	}
	278	sta->flags &= ~(WLAN_STA_WPS \| WLAN_STA_MAYBE_WPS);
	279
	280	if (hapd->conf->wpa) {
	281	if (ie == NULL \|\| ielen == 0) {
	282	if (hapd->conf->wps_state) {
	283	wpa_printf(MSG_DEBUG, "STA did not include "
	284	"WPA/RSN IE in (Re)Association "
	285	"Request - possible WPS use");
	286	sta->flags \|= WLAN_STA_MAYBE_WPS;
	287	goto skip_wpa_check;
	288	}
	289
	290	wpa_printf(MSG_DEBUG, "No WPA/RSN IE from STA");
	291	return -1;
	292	}
	293	if (hapd->conf->wps_state && ie[0] == 0xdd && ie[1] >= 4 &&
	294	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	295	sta->flags \|= WLAN_STA_WPS;
	296	goto skip_wpa_check;
	297	}
	298
	299	if (sta->wpa_sm == NULL)
	300	sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth,
	301	sta->addr);
	302	if (sta->wpa_sm == NULL) {
	303	wpa_printf(MSG_ERROR, "Failed to initialize WPA state "
	304	"machine");
	305	return -1;
	306	}
	307	res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm,
	308	ie, ielen, NULL, 0);
	309	if (res != WPA_IE_OK) {
355d36a7	310	int resp;
b5b969e9 JM	311	wpa_printf(MSG_DEBUG, "WPA/RSN information element "
	312	"rejected? (res %u)", res);
	313	wpa_hexdump(MSG_DEBUG, "IE", ie, ielen);
355d36a7 AT	314	if (res == WPA_INVALID_GROUP)
	315	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	316	else if (res == WPA_INVALID_PAIRWISE)
	317	resp = WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
	318	else if (res == WPA_INVALID_AKMP)
	319	resp = WLAN_REASON_AKMP_NOT_VALID;
	320	#ifdef CONFIG_IEEE80211W
	321	else if (res == WPA_MGMT_FRAME_PROTECTION_VIOLATION)
	322	resp = WLAN_REASON_INVALID_IE;
	323	else if (res == WPA_INVALID_MGMT_GROUP_CIPHER)
	324	resp = WLAN_REASON_GROUP_CIPHER_NOT_VALID;
	325	#endif /* CONFIG_IEEE80211W */
	326	else
	327	resp = WLAN_REASON_INVALID_IE;
	328	hostapd_sta_disassoc(hapd, sta->addr, resp);
	329	ap_free_sta(hapd, sta);
b5b969e9 JM	330	return -1;
b5b969e9 JM	331	}
a9aca28b JM	332	} else if (hapd->conf->wps_state) {
	333	if (ie && ielen > 4 && ie[0] == 0xdd && ie[1] >= 4 &&
	334	os_memcmp(ie + 2, "\x00\x50\xf2\x04", 4) == 0) {
	335	sta->flags \|= WLAN_STA_WPS;
	336	} else
	337	sta->flags \|= WLAN_STA_MAYBE_WPS;
b5b969e9 JM	338	}
	339	skip_wpa_check:
	340
	341	new_assoc = (sta->flags & WLAN_STA_ASSOC) == 0;
	342	sta->flags \|= WLAN_STA_AUTH \| WLAN_STA_ASSOC;
	343	wpa_auth_sm_event(sta->wpa_sm, WPA_ASSOC);
	344
	345	hostapd_new_assoc_sta(hapd, sta, !new_assoc);
	346
	347	ieee802_1x_notify_port_enabled(sta->eapol_sm, 1);
	348
	349	return 0;
	350	}
	351
	352
	353	void hostapd_notif_disassoc(struct hostapd_data hapd, const u8 addr)
	354	{
	355	struct sta_info *sta;
	356
	357	hostapd_logger(hapd, addr, HOSTAPD_MODULE_IEEE80211,
	358	HOSTAPD_LEVEL_INFO, "disassociated");
	359
	360	sta = ap_get_sta(hapd, addr);
	361	if (sta == NULL) {
	362	wpa_printf(MSG_DEBUG, "Disassociation notification for "
	363	"unknown STA " MACSTR, MAC2STR(addr));
	364	return;
	365	}
	366
	367	sta->flags &= ~(WLAN_STA_AUTH \| WLAN_STA_ASSOC);
	368	wpa_auth_sm_event(sta->wpa_sm, WPA_DISASSOC);
	369	sta->acct_terminate_cause = RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST;
	370	ieee802_1x_notify_port_enabled(sta->eapol_sm, 0);
	371	ap_free_sta(hapd, sta);
	372	}
	373
	374
	375	void hostapd_eapol_receive(struct hostapd_data hapd, const u8 sa,
	376	const u8 *buf, size_t len)
	377	{
	378	ieee802_1x_receive(hapd, sa, buf, len);
	379	}
	380
	381
fe6bdb77	382	#ifdef NEED_AP_MLME
b5b969e9 JM	383	void hostapd_mgmt_rx(struct hostapd_data hapd, u8 buf, size_t len,
	384	u16 stype, struct hostapd_frame_info *fi)
	385	{
4b9841d3 JM	386	struct hostapd_iface *iface = hapd->iface;
	387	struct ieee80211_hdr *hdr;
	388	const u8 *bssid;
	389
	390	hdr = (struct ieee80211_hdr *) buf;
	391	bssid = get_hdr_bssid(hdr, len);
	392	if (bssid == NULL)
	393	return;
	394
	395	hapd = get_hapd_bssid(iface, bssid);
	396	if (hapd == NULL) {
	397	u16 fc;
	398	fc = le_to_host16(hdr->frame_control);
	399
	400	/*
	401	* Drop frames to unknown BSSIDs except for Beacon frames which
	402	* could be used to update neighbor information.
	403	*/
	404	if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
	405	WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_BEACON)
	406	hapd = iface->bss[0];
	407	else
	408	return;
	409	}
	410
	411	if (hapd == HAPD_BROADCAST) {
	412	size_t i;
	413	for (i = 0; i < iface->num_bss; i++)
	414	ieee802_11_mgmt(iface->bss[i], buf, len, stype, fi);
	415	} else
	416	ieee802_11_mgmt(hapd, buf, len, stype, fi);
b5b969e9 JM	417	}
	418
	419
	420	void hostapd_mgmt_tx_cb(struct hostapd_data hapd, u8 buf, size_t len,
	421	u16 stype, int ok)
	422	{
4b9841d3 JM	423	struct ieee80211_hdr *hdr;
	424	hdr = (struct ieee80211_hdr *) buf;
	425	hapd = get_hapd_bssid(hapd->iface, get_hdr_bssid(hdr, len));
	426	if (hapd == NULL \|\| hapd == HAPD_BROADCAST)
	427	return;
b5b969e9 JM	428	ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
b5b969e9 JM	429	}
fe6bdb77	430	#endif /* NEED_AP_MLME */
b5b969e9 JM	431
	432
	433	void hostapd_michael_mic_failure(struct hostapd_data hapd, const u8 addr)
	434	{
	435	michael_mic_failure(hapd, addr, 1);
	436	}
f82ef4d8 JM	437
	438
	439	struct hostapd_data * hostapd_sta_get_bss(struct hostapd_data *hapd,
	440	const u8 *addr)
	441	{
	442	struct hostapd_iface *iface = hapd->iface;
	443	size_t j;
	444
	445	for (j = 0; j < iface->num_bss; j++) {
	446	hapd = iface->bss[j];
	447	if (ap_get_sta(hapd, addr))
	448	return hapd;
	449	}
	450
	451	return NULL;
	452	}
ad1e68e6 JM	453
	454
	455	#ifndef CONFIG_AP
	456	void wpa_supplicant_event(void *ctx, wpa_event_type event,
	457	union wpa_event_data *data)
	458	{
	459	struct hostapd_data *hapd = ctx;
	460
	461	switch (event) {
	462	case EVENT_MICHAEL_MIC_FAILURE:
	463	michael_mic_failure(hapd, data->michael_mic_failure.src, 1);
	464	break;
	465	case EVENT_SCAN_RESULTS:
	466	if (hapd->iface->scan_cb)
	467	hapd->iface->scan_cb(hapd->iface);
	468	break;
	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	}
0c3abf8d JM	486
	487
	488	void hostapd_button_pushed(struct hostapd_data *hapd)
	489	{
	490	hostapd_wps_button_pushed(hapd);
	491	}