[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 "wpa.h"
#include "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 "sme.h"

void sme_authenticate(struct wpa_supplicant *wpa_s,
		      struct wpa_scan_res *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;
	ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
	if (ie == NULL) {
		wpa_printf(MSG_ERROR, "SME: SSID not available for the BSS");
		return;
	}
	params.ssid = ie + 2;
	params.ssid_len = ie[1];

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