[thirdparty/hostap.git] / wpa_supplicant / sme.c

/*
 * wpa_supplicant - SME
 * Copyright (c) 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 "common/ieee802_11_defs.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "common/wpa_common.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/pmksa_cache.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "wpas_glue.h"
#include "wps_supplicant.h"
#include "notify.h"
#include "blacklist.h"
#include "bss.h"
#include "sme.h"

void sme_authenticate(struct wpa_supplicant *wpa_s,
		      struct wpa_bss *bss, struct wpa_ssid *ssid)
{
	struct wpa_driver_auth_params params;
	struct wpa_ssid *old_ssid;
	const u8 *ie;
#ifdef CONFIG_IEEE80211R
	const u8 *md = NULL;
#endif /* CONFIG_IEEE80211R */
	int i, bssid_changed;

	if (bss == NULL) {
		wpa_printf(MSG_ERROR, "SME: No scan result available for the "
			   "network");
		return;
	}

	os_memset(&params, 0, sizeof(params));
	wpa_s->reassociate = 0;

	params.freq = bss->freq;
	params.bssid = bss->bssid;
	params.ssid = bss->ssid;
	params.ssid_len = bss->ssid_len;

	if (wpa_s->sme.ssid_len != params.ssid_len ||
	    os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
		wpa_s->sme.prev_bssid_set = 0;

	wpa_s->sme.freq = params.freq;
	os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
	wpa_s->sme.ssid_len = params.ssid_len;

	params.auth_alg = AUTH_ALG_OPEN_SYSTEM;
#ifdef IEEE8021X_EAPOL
	if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
		if (ssid->leap) {
			if (ssid->non_leap == 0)
				params.auth_alg = AUTH_ALG_LEAP;
			else
				params.auth_alg |= AUTH_ALG_LEAP;
		}
	}
#endif /* IEEE8021X_EAPOL */
	wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
		   params.auth_alg);
	if (ssid->auth_alg) {
		params.auth_alg = 0;
		if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
			params.auth_alg |= AUTH_ALG_OPEN_SYSTEM;
		if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
			params.auth_alg |= AUTH_ALG_SHARED_KEY;
		if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
			params.auth_alg |= AUTH_ALG_LEAP;
		wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
			   params.auth_alg);
	}

	for (i = 0; i < NUM_WEP_KEYS; i++) {
		if (ssid->wep_key_len[i])
			params.wep_key[i] = ssid->wep_key[i];
		params.wep_key_len[i] = ssid->wep_key_len[i];
	}
	params.wep_tx_keyidx = ssid->wep_tx_keyidx;

	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
	os_memset(wpa_s->bssid, 0, ETH_ALEN);
	os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
	if (bssid_changed)
		wpas_notify_bssid_changed(wpa_s);

	if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
		    wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
	    (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
			       WPA_KEY_MGMT_FT_IEEE8021X |
			       WPA_KEY_MGMT_FT_PSK |
			       WPA_KEY_MGMT_IEEE8021X_SHA256 |
			       WPA_KEY_MGMT_PSK_SHA256))) {
		int try_opportunistic;
		try_opportunistic = ssid->proactive_key_caching &&
			(ssid->proto & WPA_PROTO_RSN);
		if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
					    wpa_s->current_ssid,
					    try_opportunistic) == 0)
			eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
		wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
		if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
					      wpa_s->sme.assoc_req_ie,
					      &wpa_s->sme.assoc_req_ie_len)) {
			wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
				   "management and encryption suites");
			return;
		}
	} else if (ssid->key_mgmt &
		   (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
		    WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
		    WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
		    WPA_KEY_MGMT_IEEE8021X_SHA256)) {
		wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
		if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
					      wpa_s->sme.assoc_req_ie,
					      &wpa_s->sme.assoc_req_ie_len)) {
			wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
				   "management and encryption suites (no scan "
				   "results)");
			return;
		}
#ifdef CONFIG_WPS
	} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
		struct wpabuf *wps_ie;
		wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
		if (wps_ie && wpabuf_len(wps_ie) <=
		    sizeof(wpa_s->sme.assoc_req_ie)) {
			wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
			os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
				  wpa_s->sme.assoc_req_ie_len);
		} else
			wpa_s->sme.assoc_req_ie_len = 0;
		wpabuf_free(wps_ie);
		wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
#endif /* CONFIG_WPS */
	} else {
		wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
		wpa_s->sme.assoc_req_ie_len = 0;
	}

#ifdef CONFIG_IEEE80211R
	ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
	if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
		md = ie + 2;
	wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
	if (md) {
		/* Prepare for the next transition */
		wpa_ft_prepare_auth_request(wpa_s->wpa);
	}

	if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
				    WPA_KEY_MGMT_FT_IEEE8021X)) {
		if (wpa_s->sme.assoc_req_ie_len + 5 <
		    sizeof(wpa_s->sme.assoc_req_ie)) {
			struct rsn_mdie *mdie;
			u8 *pos = wpa_s->sme.assoc_req_ie +
				wpa_s->sme.assoc_req_ie_len;
			*pos++ = WLAN_EID_MOBILITY_DOMAIN;
			*pos++ = sizeof(*mdie);
			mdie = (struct rsn_mdie *) pos;
			os_memcpy(mdie->mobility_domain, md,
				  MOBILITY_DOMAIN_ID_LEN);
			mdie->ft_capab = 0;
			wpa_s->sme.assoc_req_ie_len += 5;
		}

		if (wpa_s->sme.ft_used &&
		    os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0) {
			wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
				   "over-the-air");
			params.auth_alg = AUTH_ALG_FT;
			params.ie = wpa_s->sme.ft_ies;
			params.ie_len = wpa_s->sme.ft_ies_len;
		}
	}
#endif /* CONFIG_IEEE80211R */

#ifdef CONFIG_IEEE80211W
	switch (ssid->ieee80211w) {
	case NO_IEEE80211W:
		wpa_s->sme.mfp = NO_MGMT_FRAME_PROTECTION;
		break;
	case IEEE80211W_OPTIONAL:
		wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_OPTIONAL;
		break;
	case IEEE80211W_REQUIRED:
		wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
		break;
	}
	if (ssid->ieee80211w != NO_IEEE80211W && bss) {
		const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
		struct wpa_ie_data _ie;
		if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
		    _ie.capabilities &
		    (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
			wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
				   "require MFP");
			wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
		}
	}
#endif /* CONFIG_IEEE80211W */

	wpa_supplicant_cancel_scan(wpa_s);

	wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
		" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
		wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);

	wpa_clear_keys(wpa_s, bss->bssid);
	wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
	old_ssid = wpa_s->current_ssid;
	wpa_s->current_ssid = ssid;
	wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
	wpa_supplicant_initiate_eapol(wpa_s);
	if (old_ssid != wpa_s->current_ssid)
		wpas_notify_network_changed(wpa_s);

	if (wpa_drv_authenticate(wpa_s, &params) < 0) {
		wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
			"driver failed");
		return;
	}

	/* TODO: add timeout on authentication */

	/*
	 * Association will be started based on the authentication event from
	 * the driver.
	 */
}


void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
{
	struct wpa_driver_associate_params params;
	struct wpa_ssid *ssid = wpa_s->current_ssid;

	if (ssid == NULL) {
		wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
			   "network is not selected");
		return;
	}

	if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
		wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
			   "not in authenticating state");
		return;
	}

	if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
		wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
			   "unexpected peer " MACSTR,
			   MAC2STR(data->auth.peer));
		return;
	}

	wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
		   " auth_type=%d status_code=%d",
		   MAC2STR(data->auth.peer), data->auth.auth_type,
		   data->auth.status_code);
	wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
		    data->auth.ies, data->auth.ies_len);

	if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
		wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
			   "code %d)", data->auth.status_code);
		return;
	}

#ifdef CONFIG_IEEE80211R
	if (data->auth.auth_type == WLAN_AUTH_FT) {
		union wpa_event_data edata;
		os_memset(&edata, 0, sizeof(edata));
		edata.ft_ies.ies = data->auth.ies;
		edata.ft_ies.ies_len = data->auth.ies_len;
		os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
		wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
	}
#endif /* CONFIG_IEEE80211R */

	os_memset(&params, 0, sizeof(params));
	params.bssid = data->auth.peer;
	params.ssid = wpa_s->sme.ssid;
	params.ssid_len = wpa_s->sme.ssid_len;
	params.freq = wpa_s->sme.freq;
	params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
		wpa_s->sme.assoc_req_ie : NULL;
	params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
#ifdef CONFIG_IEEE80211R
	if (data->auth.auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
		params.wpa_ie = wpa_s->sme.ft_ies;
		params.wpa_ie_len = wpa_s->sme.ft_ies_len;
	}
#endif /* CONFIG_IEEE80211R */
	params.mode = ssid->mode;
	params.mgmt_frame_protection = wpa_s->sme.mfp;
	if (wpa_s->sme.prev_bssid_set)
		params.prev_bssid = wpa_s->sme.prev_bssid;

	wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
		" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
		params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
		params.freq);

	wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);

	if (wpa_drv_associate(wpa_s, &params) < 0) {
		wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
			"failed");
		return;
	}

	/* TODO: add timeout on association */
}


int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
		      const u8 *ies, size_t ies_len)
{
	if (md == NULL || ies == NULL) {
		wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
		os_free(wpa_s->sme.ft_ies);
		wpa_s->sme.ft_ies = NULL;
		wpa_s->sme.ft_ies_len = 0;
		wpa_s->sme.ft_used = 0;
		return 0;
	}

	os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
	wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
	os_free(wpa_s->sme.ft_ies);
	wpa_s->sme.ft_ies = os_malloc(ies_len);
	if (wpa_s->sme.ft_ies == NULL)
		return -1;
	os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
	wpa_s->sme.ft_ies_len = ies_len;
	return 0;
}


void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
			    union wpa_event_data *data)
{
	int bssid_changed;
	int timeout = 5000;

	wpa_printf(MSG_DEBUG, "SME: Association with " MACSTR " failed: "
		   "status code %d", MAC2STR(wpa_s->pending_bssid),
		   data->assoc_reject.status_code);

	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);

	/*
	 * For now, unconditionally terminate the previous authentication. In
	 * theory, this should not be needed, but mac80211 gets quite confused
	 * if the authentication is left pending.. Some roaming cases might
	 * benefit from using the previous authentication, so this could be
	 * optimized in the future.
	 */
	if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
				   WLAN_REASON_DEAUTH_LEAVING) < 0) {
		wpa_msg(wpa_s, MSG_INFO,
			"Deauth request to the driver failed");
	}
	wpa_s->sme.prev_bssid_set = 0;

	if (wpa_blacklist_add(wpa_s, wpa_s->pending_bssid) == 0) {
		struct wpa_blacklist *b;
		b = wpa_blacklist_get(wpa_s, wpa_s->pending_bssid);
		if (b && b->count < 3) {
			/*
			 * Speed up next attempt if there could be other APs
			 * that could accept association.
			 */
			timeout = 100;
		}
	}
	wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
	os_memset(wpa_s->bssid, 0, ETH_ALEN);
	os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
	if (bssid_changed)
		wpas_notify_bssid_changed(wpa_s);

	/*
	 * TODO: if more than one possible AP is available in scan results,
	 * could try the other ones before requesting a new scan.
	 */
	wpa_supplicant_req_scan(wpa_s, timeout / 1000,
				1000 * (timeout % 1000));
}


void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
			      union wpa_event_data *data)
{
	wpa_printf(MSG_DEBUG, "SME: Authentication timed out");
	wpa_supplicant_req_scan(wpa_s, 5, 0);
}


void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
			       union wpa_event_data *data)
{
	wpa_printf(MSG_DEBUG, "SME: Association timed out");
	wpa_supplicant_mark_disassoc(wpa_s);
	wpa_supplicant_req_scan(wpa_s, 5, 0);
}


void sme_event_disassoc(struct wpa_supplicant *wpa_s,
			union wpa_event_data *data)
{
	wpa_printf(MSG_DEBUG, "SME: Disassociation event received");
	if (!is_zero_ether_addr(wpa_s->bssid) &&
	    !(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
		/*
		 * cfg80211/mac80211 can get into somewhat confused state if
		 * the AP only disassociates us and leaves us in authenticated
		 * state. For now, force the state to be cleared to avoid
		 * confusing errors if we try to associate with the AP again.
		 */
		wpa_printf(MSG_DEBUG, "SME: Deauthenticate to clear driver "
			   "state");
		wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
				       WLAN_REASON_DEAUTH_LEAVING);
	}
}
Commit	Line	Data
c2a04078 JM	1	/*
	2	* wpa_supplicant - SME
	3	* Copyright (c) 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
	17	#include "common.h"
90973fb2	18	#include "common/ieee802_11_defs.h"
c2a04078	19	#include "eapol_supp/eapol_supp_sm.h"
90973fb2	20	#include "common/wpa_common.h"
3acb5005 JM	21	#include "rsn_supp/wpa.h"
3acb5005 JM	22	#include "rsn_supp/pmksa_cache.h"
c2a04078 JM	23	#include "config.h"
c2a04078 JM	24	#include "wpa_supplicant_i.h"
2d5b792d	25	#include "driver_i.h"
c2a04078 JM	26	#include "wpas_glue.h"
c2a04078 JM	27	#include "wps_supplicant.h"
8bac466b	28	#include "notify.h"
76d11d3f	29	#include "blacklist.h"
6fa81a3b	30	#include "bss.h"
c2a04078 JM	31	#include "sme.h"
	32
	33	void sme_authenticate(struct wpa_supplicant *wpa_s,
6fa81a3b	34	struct wpa_bss bss, struct wpa_ssid ssid)
c2a04078 JM	35	{
c2a04078 JM	36	struct wpa_driver_auth_params params;
8bac466b	37	struct wpa_ssid *old_ssid;
c2a04078 JM	38	const u8 *ie;
	39	#ifdef CONFIG_IEEE80211R
	40	const u8 *md = NULL;
	41	#endif /* CONFIG_IEEE80211R */
8bac466b	42	int i, bssid_changed;
c2a04078 JM	43
	44	if (bss == NULL) {
	45	wpa_printf(MSG_ERROR, "SME: No scan result available for the "
	46	"network");
	47	return;
	48	}
	49
	50	os_memset(&params, 0, sizeof(params));
	51	wpa_s->reassociate = 0;
	52
	53	params.freq = bss->freq;
	54	params.bssid = bss->bssid;
6fa81a3b JM	55	params.ssid = bss->ssid;
6fa81a3b JM	56	params.ssid_len = bss->ssid_len;
c2a04078	57
62fa124c JM	58	if (wpa_s->sme.ssid_len != params.ssid_len \|\|
	59	os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
	60	wpa_s->sme.prev_bssid_set = 0;
	61
c2a04078 JM	62	wpa_s->sme.freq = params.freq;
	63	os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
	64	wpa_s->sme.ssid_len = params.ssid_len;
	65
	66	params.auth_alg = AUTH_ALG_OPEN_SYSTEM;
	67	#ifdef IEEE8021X_EAPOL
	68	if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
	69	if (ssid->leap) {
	70	if (ssid->non_leap == 0)
	71	params.auth_alg = AUTH_ALG_LEAP;
	72	else
	73	params.auth_alg \|= AUTH_ALG_LEAP;
	74	}
	75	}
	76	#endif /* IEEE8021X_EAPOL */
	77	wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
	78	params.auth_alg);
	79	if (ssid->auth_alg) {
	80	params.auth_alg = 0;
	81	if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
	82	params.auth_alg \|= AUTH_ALG_OPEN_SYSTEM;
	83	if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
	84	params.auth_alg \|= AUTH_ALG_SHARED_KEY;
	85	if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
	86	params.auth_alg \|= AUTH_ALG_LEAP;
	87	wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
	88	params.auth_alg);
	89	}
	90
a0b2f99b JM	91	for (i = 0; i < NUM_WEP_KEYS; i++) {
	92	if (ssid->wep_key_len[i])
	93	params.wep_key[i] = ssid->wep_key[i];
	94	params.wep_key_len[i] = ssid->wep_key_len[i];
	95	}
	96	params.wep_tx_keyidx = ssid->wep_tx_keyidx;
	97
8bac466b	98	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
c2a04078 JM	99	os_memset(wpa_s->bssid, 0, ETH_ALEN);
c2a04078 JM	100	os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
8bac466b JM	101	if (bssid_changed)
8bac466b JM	102	wpas_notify_bssid_changed(wpa_s);
c2a04078	103
6fa81a3b JM	104	if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) \|\|
6fa81a3b JM	105	wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
c2a04078 JM	106	(ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X \| WPA_KEY_MGMT_PSK \|
	107	WPA_KEY_MGMT_FT_IEEE8021X \|
	108	WPA_KEY_MGMT_FT_PSK \|
	109	WPA_KEY_MGMT_IEEE8021X_SHA256 \|
	110	WPA_KEY_MGMT_PSK_SHA256))) {
	111	int try_opportunistic;
	112	try_opportunistic = ssid->proactive_key_caching &&
	113	(ssid->proto & WPA_PROTO_RSN);
	114	if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
	115	wpa_s->current_ssid,
	116	try_opportunistic) == 0)
	117	eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
	118	wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
	119	if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
	120	wpa_s->sme.assoc_req_ie,
	121	&wpa_s->sme.assoc_req_ie_len)) {
	122	wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
	123	"management and encryption suites");
	124	return;
	125	}
	126	} else if (ssid->key_mgmt &
	127	(WPA_KEY_MGMT_PSK \| WPA_KEY_MGMT_IEEE8021X \|
	128	WPA_KEY_MGMT_WPA_NONE \| WPA_KEY_MGMT_FT_PSK \|
	129	WPA_KEY_MGMT_FT_IEEE8021X \| WPA_KEY_MGMT_PSK_SHA256 \|
	130	WPA_KEY_MGMT_IEEE8021X_SHA256)) {
	131	wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
	132	if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
	133	wpa_s->sme.assoc_req_ie,
	134	&wpa_s->sme.assoc_req_ie_len)) {
	135	wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
	136	"management and encryption suites (no scan "
	137	"results)");
	138	return;
	139	}
	140	#ifdef CONFIG_WPS
	141	} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
	142	struct wpabuf *wps_ie;
	143	wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
	144	if (wps_ie && wpabuf_len(wps_ie) <=
	145	sizeof(wpa_s->sme.assoc_req_ie)) {
	146	wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
	147	os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
	148	wpa_s->sme.assoc_req_ie_len);
	149	} else
	150	wpa_s->sme.assoc_req_ie_len = 0;
	151	wpabuf_free(wps_ie);
	152	wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
	153	#endif /* CONFIG_WPS */
	154	} else {
	155	wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
	156	wpa_s->sme.assoc_req_ie_len = 0;
	157	}
	158
	159	#ifdef CONFIG_IEEE80211R
6fa81a3b	160	ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
c2a04078 JM	161	if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
	162	md = ie + 2;
	163	wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
	164	if (md) {
	165	/* Prepare for the next transition */
	166	wpa_ft_prepare_auth_request(wpa_s->wpa);
	167	}
	168
	169	if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK \|
	170	WPA_KEY_MGMT_FT_IEEE8021X)) {
	171	if (wpa_s->sme.assoc_req_ie_len + 5 <
	172	sizeof(wpa_s->sme.assoc_req_ie)) {
	173	struct rsn_mdie *mdie;
	174	u8 *pos = wpa_s->sme.assoc_req_ie +
	175	wpa_s->sme.assoc_req_ie_len;
	176	*pos++ = WLAN_EID_MOBILITY_DOMAIN;
	177	pos++ = sizeof(mdie);
	178	mdie = (struct rsn_mdie *) pos;
	179	os_memcpy(mdie->mobility_domain, md,
	180	MOBILITY_DOMAIN_ID_LEN);
	181	mdie->ft_capab = 0;
	182	wpa_s->sme.assoc_req_ie_len += 5;
	183	}
	184
	185	if (wpa_s->sme.ft_used &&
	186	os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0) {
	187	wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
	188	"over-the-air");
	189	params.auth_alg = AUTH_ALG_FT;
	190	params.ie = wpa_s->sme.ft_ies;
	191	params.ie_len = wpa_s->sme.ft_ies_len;
	192	}
	193	}
	194	#endif /* CONFIG_IEEE80211R */
	195
	196	#ifdef CONFIG_IEEE80211W
	197	switch (ssid->ieee80211w) {
	198	case NO_IEEE80211W:
	199	wpa_s->sme.mfp = NO_MGMT_FRAME_PROTECTION;
	200	break;
	201	case IEEE80211W_OPTIONAL:
	202	wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_OPTIONAL;
	203	break;
	204	case IEEE80211W_REQUIRED:
	205	wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
	206	break;
	207	}
	208	if (ssid->ieee80211w != NO_IEEE80211W && bss) {
6fa81a3b	209	const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
c2a04078 JM	210	struct wpa_ie_data _ie;
	211	if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
	212	_ie.capabilities &
	213	(WPA_CAPABILITY_MFPC \| WPA_CAPABILITY_MFPR)) {
	214	wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
	215	"require MFP");
	216	wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
	217	}
	218	}
	219	#endif /* CONFIG_IEEE80211W */
	220
	221	wpa_supplicant_cancel_scan(wpa_s);
	222
	223	wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
	224	" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
	225	wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
	226
	227	wpa_clear_keys(wpa_s, bss->bssid);
	228	wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
8bac466b	229	old_ssid = wpa_s->current_ssid;
c2a04078 JM	230	wpa_s->current_ssid = ssid;
	231	wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
	232	wpa_supplicant_initiate_eapol(wpa_s);
8bac466b JM	233	if (old_ssid != wpa_s->current_ssid)
8bac466b JM	234	wpas_notify_network_changed(wpa_s);
c2a04078 JM	235
	236	if (wpa_drv_authenticate(wpa_s, &params) < 0) {
	237	wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
	238	"driver failed");
	239	return;
	240	}
	241
	242	/* TODO: add timeout on authentication */
	243
	244	/*
	245	* Association will be started based on the authentication event from
	246	* the driver.
	247	*/
	248	}
	249
	250
	251	void sme_event_auth(struct wpa_supplicant wpa_s, union wpa_event_data data)
	252	{
	253	struct wpa_driver_associate_params params;
	254	struct wpa_ssid *ssid = wpa_s->current_ssid;
	255
	256	if (ssid == NULL) {
	257	wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
	258	"network is not selected");
	259	return;
	260	}
	261
	262	if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
	263	wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
	264	"not in authenticating state");
	265	return;
	266	}
	267
	268	if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
	269	wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
	270	"unexpected peer " MACSTR,
	271	MAC2STR(data->auth.peer));
	272	return;
	273	}
	274
	275	wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
	276	" auth_type=%d status_code=%d",
	277	MAC2STR(data->auth.peer), data->auth.auth_type,
	278	data->auth.status_code);
	279	wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
	280	data->auth.ies, data->auth.ies_len);
	281
	282	if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
	283	wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
	284	"code %d)", data->auth.status_code);
	285	return;
	286	}
	287
	288	#ifdef CONFIG_IEEE80211R
	289	if (data->auth.auth_type == WLAN_AUTH_FT) {
	290	union wpa_event_data edata;
	291	os_memset(&edata, 0, sizeof(edata));
	292	edata.ft_ies.ies = data->auth.ies;
	293	edata.ft_ies.ies_len = data->auth.ies_len;
	294	os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
	295	wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
	296	}
	297	#endif /* CONFIG_IEEE80211R */
	298
299	os_memset(&params, 0, sizeof(params));
300	params.bssid = data->auth.peer;
301	params.ssid = wpa_s->sme.ssid;
302	params.ssid_len = wpa_s->sme.ssid_len;
303	params.freq = wpa_s->sme.freq;
304	params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
305	wpa_s->sme.assoc_req_ie : NULL;
306	params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
307	#ifdef CONFIG_IEEE80211R
308	if (data->auth.auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
309	params.wpa_ie = wpa_s->sme.ft_ies;
310	params.wpa_ie_len = wpa_s->sme.ft_ies_len;
311	}
312	#endif /* CONFIG_IEEE80211R */
313	params.mode = ssid->mode;
314	params.mgmt_frame_protection = wpa_s->sme.mfp;
62fa124c JM	315	if (wpa_s->sme.prev_bssid_set)
62fa124c JM	316	params.prev_bssid = wpa_s->sme.prev_bssid;
c2a04078 JM	317
	318	wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
	319	" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
	320	params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
	321	params.freq);
	322
	323	wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
	324
	325	if (wpa_drv_associate(wpa_s, &params) < 0) {
	326	wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
	327	"failed");
	328	return;
	329	}
	330
	331	/* TODO: add timeout on association */
	332	}
	333
	334
	335	int sme_update_ft_ies(struct wpa_supplicant wpa_s, const u8 md,
	336	const u8 *ies, size_t ies_len)
	337	{
	338	if (md == NULL \|\| ies == NULL) {
	339	wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
	340	os_free(wpa_s->sme.ft_ies);
	341	wpa_s->sme.ft_ies = NULL;
	342	wpa_s->sme.ft_ies_len = 0;
	343	wpa_s->sme.ft_used = 0;
	344	return 0;
	345	}
	346
	347	os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
	348	wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
	349	os_free(wpa_s->sme.ft_ies);
	350	wpa_s->sme.ft_ies = os_malloc(ies_len);
	351	if (wpa_s->sme.ft_ies == NULL)
	352	return -1;
	353	os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
	354	wpa_s->sme.ft_ies_len = ies_len;
	355	return 0;
	356	}
efa46078 JM	357
	358
	359	void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
	360	union wpa_event_data *data)
	361	{
8bac466b	362	int bssid_changed;
76d11d3f	363	int timeout = 5000;
8bac466b	364
76d11d3f JM	365	wpa_printf(MSG_DEBUG, "SME: Association with " MACSTR " failed: "
76d11d3f JM	366	"status code %d", MAC2STR(wpa_s->pending_bssid),
efa46078 JM	367	data->assoc_reject.status_code);
efa46078 JM	368
8bac466b	369	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
76d11d3f JM	370
	371	/*
	372	* For now, unconditionally terminate the previous authentication. In
	373	* theory, this should not be needed, but mac80211 gets quite confused
	374	* if the authentication is left pending.. Some roaming cases might
	375	* benefit from using the previous authentication, so this could be
	376	* optimized in the future.
	377	*/
	378	if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
	379	WLAN_REASON_DEAUTH_LEAVING) < 0) {
	380	wpa_msg(wpa_s, MSG_INFO,
	381	"Deauth request to the driver failed");
	382	}
62fa124c	383	wpa_s->sme.prev_bssid_set = 0;
76d11d3f JM	384
	385	if (wpa_blacklist_add(wpa_s, wpa_s->pending_bssid) == 0) {
	386	struct wpa_blacklist *b;
	387	b = wpa_blacklist_get(wpa_s, wpa_s->pending_bssid);
	388	if (b && b->count < 3) {
	389	/*
	390	* Speed up next attempt if there could be other APs
	391	* that could accept association.
	392	*/
	393	timeout = 100;
	394	}
	395	}
	396	wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
efa46078 JM	397	os_memset(wpa_s->bssid, 0, ETH_ALEN);
efa46078 JM	398	os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b JM	399	if (bssid_changed)
8bac466b JM	400	wpas_notify_bssid_changed(wpa_s);
efa46078 JM	401
	402	/*
	403	* TODO: if more than one possible AP is available in scan results,
	404	* could try the other ones before requesting a new scan.
	405	*/
76d11d3f JM	406	wpa_supplicant_req_scan(wpa_s, timeout / 1000,
76d11d3f JM	407	1000 * (timeout % 1000));
efa46078	408	}
da1fb17c JM	409
	410
	411	void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
	412	union wpa_event_data *data)
	413	{
	414	wpa_printf(MSG_DEBUG, "SME: Authentication timed out");
	415	wpa_supplicant_req_scan(wpa_s, 5, 0);
	416	}
	417
	418
	419	void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
	420	union wpa_event_data *data)
	421	{
	422	wpa_printf(MSG_DEBUG, "SME: Association timed out");
	423	wpa_supplicant_mark_disassoc(wpa_s);
	424	wpa_supplicant_req_scan(wpa_s, 5, 0);
	425	}
a84ed99e JM	426
	427
	428	void sme_event_disassoc(struct wpa_supplicant *wpa_s,
	429	union wpa_event_data *data)
	430	{
	431	wpa_printf(MSG_DEBUG, "SME: Disassociation event received");
	432	if (!is_zero_ether_addr(wpa_s->bssid) &&
	433	!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
	434	/*
	435	* cfg80211/mac80211 can get into somewhat confused state if
	436	* the AP only disassociates us and leaves us in authenticated
	437	* state. For now, force the state to be cleared to avoid
	438	* confusing errors if we try to associate with the AP again.
	439	*/
	440	wpa_printf(MSG_DEBUG, "SME: Deauthenticate to clear driver "
	441	"state");
	442	wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
	443	WLAN_REASON_DEAUTH_LEAVING);
	444	}
	445	}