[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 "scan.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;
#ifdef CONFIG_IEEE80211R
	const u8 *ie;
#endif /* CONFIG_IEEE80211R */
#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;
	}

	wpa_s->current_bss = bss;

	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 = WPA_AUTH_ALG_OPEN;
#ifdef IEEE8021X_EAPOL
	if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
		if (ssid->leap) {
			if (ssid->non_leap == 0)
				params.auth_alg = WPA_AUTH_ALG_LEAP;
			else
				params.auth_alg |= WPA_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 = ssid->auth_alg;
		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 = WPA_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
	wpa_s->sme.mfp = ssid->ieee80211w;
	if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && 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"
9ba9fa07	31	#include "scan.h"
c2a04078 JM	32	#include "sme.h"
	33
	34	void sme_authenticate(struct wpa_supplicant *wpa_s,
6fa81a3b	35	struct wpa_bss bss, struct wpa_ssid ssid)
c2a04078 JM	36	{
c2a04078 JM	37	struct wpa_driver_auth_params params;
8bac466b	38	struct wpa_ssid *old_ssid;
fdbe50ed	39	#ifdef CONFIG_IEEE80211R
c2a04078	40	const u8 *ie;
fdbe50ed	41	#endif /* CONFIG_IEEE80211R */
c2a04078 JM	42	#ifdef CONFIG_IEEE80211R
	43	const u8 *md = NULL;
	44	#endif /* CONFIG_IEEE80211R */
8bac466b	45	int i, bssid_changed;
c2a04078 JM	46
	47	if (bss == NULL) {
	48	wpa_printf(MSG_ERROR, "SME: No scan result available for the "
	49	"network");
	50	return;
	51	}
	52
8f770587 JM	53	wpa_s->current_bss = bss;
8f770587 JM	54
c2a04078 JM	55	os_memset(&params, 0, sizeof(params));
	56	wpa_s->reassociate = 0;
	57
	58	params.freq = bss->freq;
	59	params.bssid = bss->bssid;
6fa81a3b JM	60	params.ssid = bss->ssid;
6fa81a3b JM	61	params.ssid_len = bss->ssid_len;
c2a04078	62
62fa124c JM	63	if (wpa_s->sme.ssid_len != params.ssid_len \|\|
	64	os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
	65	wpa_s->sme.prev_bssid_set = 0;
	66
c2a04078 JM	67	wpa_s->sme.freq = params.freq;
	68	os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
	69	wpa_s->sme.ssid_len = params.ssid_len;
	70
abd9fafa	71	params.auth_alg = WPA_AUTH_ALG_OPEN;
c2a04078 JM	72	#ifdef IEEE8021X_EAPOL
	73	if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
	74	if (ssid->leap) {
	75	if (ssid->non_leap == 0)
abd9fafa	76	params.auth_alg = WPA_AUTH_ALG_LEAP;
c2a04078	77	else
abd9fafa	78	params.auth_alg \|= WPA_AUTH_ALG_LEAP;
c2a04078 JM	79	}
	80	}
	81	#endif /* IEEE8021X_EAPOL */
	82	wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
	83	params.auth_alg);
	84	if (ssid->auth_alg) {
abd9fafa	85	params.auth_alg = ssid->auth_alg;
c2a04078 JM	86	wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
	87	params.auth_alg);
	88	}
	89
a0b2f99b JM	90	for (i = 0; i < NUM_WEP_KEYS; i++) {
	91	if (ssid->wep_key_len[i])
	92	params.wep_key[i] = ssid->wep_key[i];
	93	params.wep_key_len[i] = ssid->wep_key_len[i];
	94	}
	95	params.wep_tx_keyidx = ssid->wep_tx_keyidx;
	96
8bac466b	97	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
c2a04078 JM	98	os_memset(wpa_s->bssid, 0, ETH_ALEN);
c2a04078 JM	99	os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
8bac466b JM	100	if (bssid_changed)
8bac466b JM	101	wpas_notify_bssid_changed(wpa_s);
c2a04078	102
6fa81a3b JM	103	if (bss && (wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) \|\|
6fa81a3b JM	104	wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
c2a04078 JM	105	(ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X \| WPA_KEY_MGMT_PSK \|
	106	WPA_KEY_MGMT_FT_IEEE8021X \|
	107	WPA_KEY_MGMT_FT_PSK \|
	108	WPA_KEY_MGMT_IEEE8021X_SHA256 \|
	109	WPA_KEY_MGMT_PSK_SHA256))) {
	110	int try_opportunistic;
	111	try_opportunistic = ssid->proactive_key_caching &&
	112	(ssid->proto & WPA_PROTO_RSN);
	113	if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
	114	wpa_s->current_ssid,
	115	try_opportunistic) == 0)
	116	eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
	117	wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
	118	if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
	119	wpa_s->sme.assoc_req_ie,
	120	&wpa_s->sme.assoc_req_ie_len)) {
	121	wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
	122	"management and encryption suites");
	123	return;
	124	}
	125	} else if (ssid->key_mgmt &
	126	(WPA_KEY_MGMT_PSK \| WPA_KEY_MGMT_IEEE8021X \|
	127	WPA_KEY_MGMT_WPA_NONE \| WPA_KEY_MGMT_FT_PSK \|
	128	WPA_KEY_MGMT_FT_IEEE8021X \| WPA_KEY_MGMT_PSK_SHA256 \|
	129	WPA_KEY_MGMT_IEEE8021X_SHA256)) {
	130	wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
	131	if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
	132	wpa_s->sme.assoc_req_ie,
	133	&wpa_s->sme.assoc_req_ie_len)) {
	134	wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
	135	"management and encryption suites (no scan "
	136	"results)");
	137	return;
	138	}
	139	#ifdef CONFIG_WPS
	140	} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
	141	struct wpabuf *wps_ie;
	142	wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
	143	if (wps_ie && wpabuf_len(wps_ie) <=
	144	sizeof(wpa_s->sme.assoc_req_ie)) {
	145	wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
	146	os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
	147	wpa_s->sme.assoc_req_ie_len);
	148	} else
	149	wpa_s->sme.assoc_req_ie_len = 0;
	150	wpabuf_free(wps_ie);
	151	wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
	152	#endif /* CONFIG_WPS */
	153	} else {
	154	wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
	155	wpa_s->sme.assoc_req_ie_len = 0;
	156	}
	157
	158	#ifdef CONFIG_IEEE80211R
6fa81a3b	159	ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
c2a04078 JM	160	if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
	161	md = ie + 2;
	162	wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
	163	if (md) {
	164	/* Prepare for the next transition */
	165	wpa_ft_prepare_auth_request(wpa_s->wpa);
	166	}
	167
	168	if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK \|
	169	WPA_KEY_MGMT_FT_IEEE8021X)) {
	170	if (wpa_s->sme.assoc_req_ie_len + 5 <
	171	sizeof(wpa_s->sme.assoc_req_ie)) {
	172	struct rsn_mdie *mdie;
	173	u8 *pos = wpa_s->sme.assoc_req_ie +
	174	wpa_s->sme.assoc_req_ie_len;
	175	*pos++ = WLAN_EID_MOBILITY_DOMAIN;
	176	pos++ = sizeof(mdie);
	177	mdie = (struct rsn_mdie *) pos;
	178	os_memcpy(mdie->mobility_domain, md,
	179	MOBILITY_DOMAIN_ID_LEN);
	180	mdie->ft_capab = 0;
	181	wpa_s->sme.assoc_req_ie_len += 5;
	182	}
	183
	184	if (wpa_s->sme.ft_used &&
	185	os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0) {
	186	wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
	187	"over-the-air");
abd9fafa	188	params.auth_alg = WPA_AUTH_ALG_FT;
c2a04078 JM	189	params.ie = wpa_s->sme.ft_ies;
	190	params.ie_len = wpa_s->sme.ft_ies_len;
	191	}
	192	}
	193	#endif /* CONFIG_IEEE80211R */
	194
	195	#ifdef CONFIG_IEEE80211W
70f8cc8e JM	196	wpa_s->sme.mfp = ssid->ieee80211w;
70f8cc8e JM	197	if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION && bss) {
6fa81a3b	198	const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
c2a04078 JM	199	struct wpa_ie_data _ie;
	200	if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
	201	_ie.capabilities &
	202	(WPA_CAPABILITY_MFPC \| WPA_CAPABILITY_MFPR)) {
	203	wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
	204	"require MFP");
	205	wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
	206	}
	207	}
	208	#endif /* CONFIG_IEEE80211W */
	209
	210	wpa_supplicant_cancel_scan(wpa_s);
	211
	212	wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
	213	" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
	214	wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
	215
	216	wpa_clear_keys(wpa_s, bss->bssid);
	217	wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
8bac466b	218	old_ssid = wpa_s->current_ssid;
c2a04078 JM	219	wpa_s->current_ssid = ssid;
	220	wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
	221	wpa_supplicant_initiate_eapol(wpa_s);
8bac466b JM	222	if (old_ssid != wpa_s->current_ssid)
8bac466b JM	223	wpas_notify_network_changed(wpa_s);
c2a04078 JM	224
	225	if (wpa_drv_authenticate(wpa_s, &params) < 0) {
	226	wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
	227	"driver failed");
	228	return;
	229	}
	230
	231	/* TODO: add timeout on authentication */
	232
	233	/*
	234	* Association will be started based on the authentication event from
	235	* the driver.
	236	*/
	237	}
	238
	239
	240	void sme_event_auth(struct wpa_supplicant wpa_s, union wpa_event_data data)
	241	{
	242	struct wpa_driver_associate_params params;
	243	struct wpa_ssid *ssid = wpa_s->current_ssid;
	244
	245	if (ssid == NULL) {
	246	wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
	247	"network is not selected");
	248	return;
	249	}
	250
	251	if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
	252	wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
	253	"not in authenticating state");
	254	return;
	255	}
	256
	257	if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
	258	wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
	259	"unexpected peer " MACSTR,
	260	MAC2STR(data->auth.peer));
	261	return;
	262	}
	263
	264	wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
	265	" auth_type=%d status_code=%d",
	266	MAC2STR(data->auth.peer), data->auth.auth_type,
	267	data->auth.status_code);
	268	wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
	269	data->auth.ies, data->auth.ies_len);
	270
	271	if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
	272	wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
	273	"code %d)", data->auth.status_code);
	274	return;
	275	}
	276
	277	#ifdef CONFIG_IEEE80211R
	278	if (data->auth.auth_type == WLAN_AUTH_FT) {
	279	union wpa_event_data edata;
	280	os_memset(&edata, 0, sizeof(edata));
	281	edata.ft_ies.ies = data->auth.ies;
	282	edata.ft_ies.ies_len = data->auth.ies_len;
	283	os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
	284	wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
	285	}
	286	#endif /* CONFIG_IEEE80211R */
	287
288	os_memset(&params, 0, sizeof(params));
289	params.bssid = data->auth.peer;
290	params.ssid = wpa_s->sme.ssid;
291	params.ssid_len = wpa_s->sme.ssid_len;
292	params.freq = wpa_s->sme.freq;
293	params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
294	wpa_s->sme.assoc_req_ie : NULL;
295	params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
296	#ifdef CONFIG_IEEE80211R
297	if (data->auth.auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
298	params.wpa_ie = wpa_s->sme.ft_ies;
299	params.wpa_ie_len = wpa_s->sme.ft_ies_len;
300	}
301	#endif /* CONFIG_IEEE80211R */
302	params.mode = ssid->mode;
303	params.mgmt_frame_protection = wpa_s->sme.mfp;
62fa124c JM	304	if (wpa_s->sme.prev_bssid_set)
62fa124c JM	305	params.prev_bssid = wpa_s->sme.prev_bssid;
c2a04078 JM	306
	307	wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
	308	" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
	309	params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
	310	params.freq);
	311
	312	wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
	313
	314	if (wpa_drv_associate(wpa_s, &params) < 0) {
	315	wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
	316	"failed");
	317	return;
	318	}
	319
	320	/* TODO: add timeout on association */
	321	}
	322
	323
	324	int sme_update_ft_ies(struct wpa_supplicant wpa_s, const u8 md,
	325	const u8 *ies, size_t ies_len)
	326	{
	327	if (md == NULL \|\| ies == NULL) {
	328	wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
	329	os_free(wpa_s->sme.ft_ies);
	330	wpa_s->sme.ft_ies = NULL;
	331	wpa_s->sme.ft_ies_len = 0;
	332	wpa_s->sme.ft_used = 0;
	333	return 0;
	334	}
	335
	336	os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
	337	wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
	338	os_free(wpa_s->sme.ft_ies);
	339	wpa_s->sme.ft_ies = os_malloc(ies_len);
	340	if (wpa_s->sme.ft_ies == NULL)
	341	return -1;
	342	os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
	343	wpa_s->sme.ft_ies_len = ies_len;
	344	return 0;
	345	}
efa46078 JM	346
	347
	348	void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
	349	union wpa_event_data *data)
	350	{
8bac466b	351	int bssid_changed;
76d11d3f	352	int timeout = 5000;
8bac466b	353
76d11d3f JM	354	wpa_printf(MSG_DEBUG, "SME: Association with " MACSTR " failed: "
76d11d3f JM	355	"status code %d", MAC2STR(wpa_s->pending_bssid),
efa46078 JM	356	data->assoc_reject.status_code);
efa46078 JM	357
8bac466b	358	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
76d11d3f JM	359
	360	/*
	361	* For now, unconditionally terminate the previous authentication. In
	362	* theory, this should not be needed, but mac80211 gets quite confused
	363	* if the authentication is left pending.. Some roaming cases might
	364	* benefit from using the previous authentication, so this could be
	365	* optimized in the future.
	366	*/
	367	if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
	368	WLAN_REASON_DEAUTH_LEAVING) < 0) {
	369	wpa_msg(wpa_s, MSG_INFO,
	370	"Deauth request to the driver failed");
	371	}
62fa124c	372	wpa_s->sme.prev_bssid_set = 0;
76d11d3f JM	373
	374	if (wpa_blacklist_add(wpa_s, wpa_s->pending_bssid) == 0) {
	375	struct wpa_blacklist *b;
	376	b = wpa_blacklist_get(wpa_s, wpa_s->pending_bssid);
	377	if (b && b->count < 3) {
	378	/*
	379	* Speed up next attempt if there could be other APs
	380	* that could accept association.
	381	*/
	382	timeout = 100;
	383	}
	384	}
	385	wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
efa46078 JM	386	os_memset(wpa_s->bssid, 0, ETH_ALEN);
efa46078 JM	387	os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b JM	388	if (bssid_changed)
8bac466b JM	389	wpas_notify_bssid_changed(wpa_s);
efa46078 JM	390
	391	/*
	392	* TODO: if more than one possible AP is available in scan results,
	393	* could try the other ones before requesting a new scan.
	394	*/
76d11d3f JM	395	wpa_supplicant_req_scan(wpa_s, timeout / 1000,
76d11d3f JM	396	1000 * (timeout % 1000));
efa46078	397	}
da1fb17c JM	398
	399
	400	void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
	401	union wpa_event_data *data)
	402	{
	403	wpa_printf(MSG_DEBUG, "SME: Authentication timed out");
	404	wpa_supplicant_req_scan(wpa_s, 5, 0);
	405	}
	406
	407
	408	void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
	409	union wpa_event_data *data)
	410	{
	411	wpa_printf(MSG_DEBUG, "SME: Association timed out");
	412	wpa_supplicant_mark_disassoc(wpa_s);
	413	wpa_supplicant_req_scan(wpa_s, 5, 0);
	414	}
a84ed99e JM	415
	416
	417	void sme_event_disassoc(struct wpa_supplicant *wpa_s,
	418	union wpa_event_data *data)
	419	{
	420	wpa_printf(MSG_DEBUG, "SME: Disassociation event received");
	421	if (!is_zero_ether_addr(wpa_s->bssid) &&
	422	!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
	423	/*
	424	* cfg80211/mac80211 can get into somewhat confused state if
	425	* the AP only disassociates us and leaves us in authenticated
	426	* state. For now, force the state to be cleared to avoid
	427	* confusing errors if we try to associate with the AP again.
	428	*/
	429	wpa_printf(MSG_DEBUG, "SME: Deauthenticate to clear driver "
	430	"state");
	431	wpa_drv_deauthenticate(wpa_s, wpa_s->bssid,
	432	WLAN_REASON_DEAUTH_LEAVING);
	433	}
	434	}