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

/*
 * wpa_supplicant - SME
 * Copyright (c) 2009-2010, 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 "common/ieee802_11_common.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 "p2p_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 ((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, ie, ie ? 2 + ie[1] : 0);
	if (md) {
		/* Prepare for the next transition */
		wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
	}

	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 = md[MOBILITY_DOMAIN_ID_LEN];
			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_sm_has_ptk(wpa_s->wpa)) {
			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) {
		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 */

#ifdef CONFIG_P2P
	if (wpa_s->global->p2p) {
		u8 *pos;
		size_t len;
		int res;
		int p2p_group;
		p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
		pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
		len = sizeof(wpa_s->sme.assoc_req_ie) -
			wpa_s->sme.assoc_req_ie_len;
		res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
		if (res >= 0)
			wpa_s->sme.assoc_req_ie_len += res;
	}
#endif /* CONFIG_P2P */

	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);

	wpa_s->sme.auth_alg = params.auth_alg;
	if (wpa_drv_authenticate(wpa_s, &params) < 0) {
		wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
			"driver failed");
		wpa_supplicant_req_scan(wpa_s, 1, 0);
		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_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);

		if (data->auth.status_code !=
		    WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
		    wpa_s->sme.auth_alg == data->auth.auth_type ||
		    wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP)
			return;

		switch (data->auth.auth_type) {
		case WLAN_AUTH_OPEN:
			wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;

			wpa_printf(MSG_DEBUG, "SME: Trying SHARED auth");
			wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
						 wpa_s->current_ssid);
			return;

		case WLAN_AUTH_SHARED_KEY:
			wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;

			wpa_printf(MSG_DEBUG, "SME: Trying LEAP auth");
			wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
						 wpa_s->current_ssid);
			return;

		default:
			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 */

	sme_associate(wpa_s, ssid->mode, data->auth.peer,
		      data->auth.auth_type);
}


void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
		   const u8 *bssid, u16 auth_type)
{
	struct wpa_driver_associate_params params;
	struct ieee802_11_elems elems;

	os_memset(&params, 0, sizeof(params));
	params.bssid = bssid;
	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 (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 = 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 (params.wpa_ie == NULL ||
	    ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
	    < 0) {
		wpa_printf(MSG_DEBUG, "SME: Could not parse own IEs?!");
		os_memset(&elems, 0, sizeof(elems));
	}
	if (elems.rsn_ie)
		wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
					elems.rsn_ie_len + 2);
	else if (elems.wpa_ie)
		wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
					elems.wpa_ie_len + 2);
	else
		wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
	if (elems.p2p &&
	    (wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
		params.p2p = 1;

	if (wpa_drv_associate(wpa_s, &params) < 0) {
		wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
			"failed");
		wpa_supplicant_req_scan(wpa_s, 5, 0);
		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 (wpa_s->sme.prev_bssid_set &&
	    !(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->sme.prev_bssid,
				       WLAN_REASON_DEAUTH_LEAVING);
	}
}
Commit	Line	Data
c2a04078 JM	1	/*
c2a04078 JM	2	* wpa_supplicant - SME
71024cb2	3	* Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
c2a04078 JM	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"
d9a27b04	19	#include "common/ieee802_11_common.h"
c2a04078	20	#include "eapol_supp/eapol_supp_sm.h"
90973fb2	21	#include "common/wpa_common.h"
3acb5005 JM	22	#include "rsn_supp/wpa.h"
3acb5005 JM	23	#include "rsn_supp/pmksa_cache.h"
c2a04078 JM	24	#include "config.h"
c2a04078 JM	25	#include "wpa_supplicant_i.h"
2d5b792d	26	#include "driver_i.h"
c2a04078 JM	27	#include "wpas_glue.h"
c2a04078 JM	28	#include "wps_supplicant.h"
5f3a6aa0	29	#include "p2p_supplicant.h"
8bac466b	30	#include "notify.h"
76d11d3f	31	#include "blacklist.h"
6fa81a3b	32	#include "bss.h"
9ba9fa07	33	#include "scan.h"
c2a04078 JM	34	#include "sme.h"
	35
	36	void sme_authenticate(struct wpa_supplicant *wpa_s,
6fa81a3b	37	struct wpa_bss bss, struct wpa_ssid ssid)
c2a04078 JM	38	{
c2a04078 JM	39	struct wpa_driver_auth_params params;
8bac466b	40	struct wpa_ssid *old_ssid;
fdbe50ed	41	#ifdef CONFIG_IEEE80211R
c2a04078	42	const u8 *ie;
fdbe50ed	43	#endif /* CONFIG_IEEE80211R */
c2a04078 JM	44	#ifdef CONFIG_IEEE80211R
	45	const u8 *md = NULL;
	46	#endif /* CONFIG_IEEE80211R */
8bac466b	47	int i, bssid_changed;
c2a04078 JM	48
	49	if (bss == NULL) {
	50	wpa_printf(MSG_ERROR, "SME: No scan result available for the "
	51	"network");
	52	return;
	53	}
	54
8f770587 JM	55	wpa_s->current_bss = bss;
8f770587 JM	56
c2a04078 JM	57	os_memset(&params, 0, sizeof(params));
	58	wpa_s->reassociate = 0;
	59
	60	params.freq = bss->freq;
	61	params.bssid = bss->bssid;
6fa81a3b JM	62	params.ssid = bss->ssid;
6fa81a3b JM	63	params.ssid_len = bss->ssid_len;
c2a04078	64
62fa124c JM	65	if (wpa_s->sme.ssid_len != params.ssid_len \|\|
	66	os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
	67	wpa_s->sme.prev_bssid_set = 0;
	68
c2a04078 JM	69	wpa_s->sme.freq = params.freq;
	70	os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
	71	wpa_s->sme.ssid_len = params.ssid_len;
	72
abd9fafa	73	params.auth_alg = WPA_AUTH_ALG_OPEN;
c2a04078 JM	74	#ifdef IEEE8021X_EAPOL
	75	if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
	76	if (ssid->leap) {
	77	if (ssid->non_leap == 0)
abd9fafa	78	params.auth_alg = WPA_AUTH_ALG_LEAP;
c2a04078	79	else
abd9fafa	80	params.auth_alg \|= WPA_AUTH_ALG_LEAP;
c2a04078 JM	81	}
	82	}
	83	#endif /* IEEE8021X_EAPOL */
	84	wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
	85	params.auth_alg);
	86	if (ssid->auth_alg) {
abd9fafa	87	params.auth_alg = ssid->auth_alg;
c2a04078 JM	88	wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
	89	params.auth_alg);
	90	}
	91
a0b2f99b JM	92	for (i = 0; i < NUM_WEP_KEYS; i++) {
	93	if (ssid->wep_key_len[i])
	94	params.wep_key[i] = ssid->wep_key[i];
	95	params.wep_key_len[i] = ssid->wep_key_len[i];
	96	}
	97	params.wep_tx_keyidx = ssid->wep_tx_keyidx;
	98
8bac466b	99	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
c2a04078 JM	100	os_memset(wpa_s->bssid, 0, ETH_ALEN);
c2a04078 JM	101	os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
8bac466b JM	102	if (bssid_changed)
8bac466b JM	103	wpas_notify_bssid_changed(wpa_s);
c2a04078	104
f337f0e9 JM	105	if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) \|\|
f337f0e9 JM	106	wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
c2a04078 JM	107	(ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X \| WPA_KEY_MGMT_PSK \|
	108	WPA_KEY_MGMT_FT_IEEE8021X \|
	109	WPA_KEY_MGMT_FT_PSK \|
	110	WPA_KEY_MGMT_IEEE8021X_SHA256 \|
	111	WPA_KEY_MGMT_PSK_SHA256))) {
	112	int try_opportunistic;
	113	try_opportunistic = ssid->proactive_key_caching &&
	114	(ssid->proto & WPA_PROTO_RSN);
	115	if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
	116	wpa_s->current_ssid,
	117	try_opportunistic) == 0)
	118	eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
	119	wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
	120	if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
	121	wpa_s->sme.assoc_req_ie,
	122	&wpa_s->sme.assoc_req_ie_len)) {
	123	wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
	124	"management and encryption suites");
	125	return;
	126	}
	127	} else if (ssid->key_mgmt &
	128	(WPA_KEY_MGMT_PSK \| WPA_KEY_MGMT_IEEE8021X \|
	129	WPA_KEY_MGMT_WPA_NONE \| WPA_KEY_MGMT_FT_PSK \|
	130	WPA_KEY_MGMT_FT_IEEE8021X \| WPA_KEY_MGMT_PSK_SHA256 \|
	131	WPA_KEY_MGMT_IEEE8021X_SHA256)) {
	132	wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
	133	if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
	134	wpa_s->sme.assoc_req_ie,
	135	&wpa_s->sme.assoc_req_ie_len)) {
	136	wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
	137	"management and encryption suites (no scan "
	138	"results)");
	139	return;
	140	}
	141	#ifdef CONFIG_WPS
	142	} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
	143	struct wpabuf *wps_ie;
	144	wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
	145	if (wps_ie && wpabuf_len(wps_ie) <=
	146	sizeof(wpa_s->sme.assoc_req_ie)) {
	147	wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
	148	os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
	149	wpa_s->sme.assoc_req_ie_len);
	150	} else
	151	wpa_s->sme.assoc_req_ie_len = 0;
	152	wpabuf_free(wps_ie);
	153	wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
	154	#endif /* CONFIG_WPS */
	155	} else {
	156	wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
	157	wpa_s->sme.assoc_req_ie_len = 0;
	158	}
	159
	160	#ifdef CONFIG_IEEE80211R
6fa81a3b	161	ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
c2a04078 JM	162	if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
c2a04078 JM	163	md = ie + 2;
e7846b68	164	wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
c2a04078 JM	165	if (md) {
c2a04078 JM	166	/* Prepare for the next transition */
76b7981d	167	wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
c2a04078 JM	168	}
	169
	170	if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK \|
	171	WPA_KEY_MGMT_FT_IEEE8021X)) {
	172	if (wpa_s->sme.assoc_req_ie_len + 5 <
	173	sizeof(wpa_s->sme.assoc_req_ie)) {
	174	struct rsn_mdie *mdie;
	175	u8 *pos = wpa_s->sme.assoc_req_ie +
	176	wpa_s->sme.assoc_req_ie_len;
	177	*pos++ = WLAN_EID_MOBILITY_DOMAIN;
	178	pos++ = sizeof(mdie);
	179	mdie = (struct rsn_mdie *) pos;
	180	os_memcpy(mdie->mobility_domain, md,
	181	MOBILITY_DOMAIN_ID_LEN);
f4ec630d	182	mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
c2a04078 JM	183	wpa_s->sme.assoc_req_ie_len += 5;
	184	}
	185
	186	if (wpa_s->sme.ft_used &&
0d7b4409 JM	187	os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
0d7b4409 JM	188	wpa_sm_has_ptk(wpa_s->wpa)) {
c2a04078 JM	189	wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
c2a04078 JM	190	"over-the-air");
abd9fafa	191	params.auth_alg = WPA_AUTH_ALG_FT;
c2a04078 JM	192	params.ie = wpa_s->sme.ft_ies;
	193	params.ie_len = wpa_s->sme.ft_ies_len;
	194	}
	195	}
	196	#endif /* CONFIG_IEEE80211R */
	197
	198	#ifdef CONFIG_IEEE80211W
70f8cc8e	199	wpa_s->sme.mfp = ssid->ieee80211w;
f337f0e9	200	if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
6fa81a3b	201	const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
c2a04078 JM	202	struct wpa_ie_data _ie;
	203	if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
	204	_ie.capabilities &
	205	(WPA_CAPABILITY_MFPC \| WPA_CAPABILITY_MFPR)) {
	206	wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
	207	"require MFP");
	208	wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
	209	}
	210	}
	211	#endif /* CONFIG_IEEE80211W */
	212
5f3a6aa0 JM	213	#ifdef CONFIG_P2P
	214	if (wpa_s->global->p2p) {
	215	u8 *pos;
	216	size_t len;
	217	int res;
	218	int p2p_group;
	219	p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
	220	pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
	221	len = sizeof(wpa_s->sme.assoc_req_ie) -
	222	wpa_s->sme.assoc_req_ie_len;
4c08c0bd	223	res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
5f3a6aa0 JM	224	if (res >= 0)
	225	wpa_s->sme.assoc_req_ie_len += res;
	226	}
	227	#endif /* CONFIG_P2P */
	228
c2a04078 JM	229	wpa_supplicant_cancel_scan(wpa_s);
	230
	231	wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
	232	" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
	233	wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
	234
	235	wpa_clear_keys(wpa_s, bss->bssid);
	236	wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
8bac466b	237	old_ssid = wpa_s->current_ssid;
c2a04078 JM	238	wpa_s->current_ssid = ssid;
	239	wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
	240	wpa_supplicant_initiate_eapol(wpa_s);
8bac466b JM	241	if (old_ssid != wpa_s->current_ssid)
8bac466b JM	242	wpas_notify_network_changed(wpa_s);
c2a04078	243
62c72d72	244	wpa_s->sme.auth_alg = params.auth_alg;
c2a04078 JM	245	if (wpa_drv_authenticate(wpa_s, &params) < 0) {
	246	wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
	247	"driver failed");
6e3f7173	248	wpa_supplicant_req_scan(wpa_s, 1, 0);
c2a04078 JM	249	return;
	250	}
	251
	252	/* TODO: add timeout on authentication */
	253
	254	/*
	255	* Association will be started based on the authentication event from
	256	* the driver.
	257	*/
	258	}
	259
	260
	261	void sme_event_auth(struct wpa_supplicant wpa_s, union wpa_event_data data)
	262	{
c2a04078 JM	263	struct wpa_ssid *ssid = wpa_s->current_ssid;
	264
	265	if (ssid == NULL) {
	266	wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
	267	"network is not selected");
	268	return;
	269	}
	270
	271	if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
	272	wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
	273	"not in authenticating state");
	274	return;
	275	}
	276
	277	if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
	278	wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
	279	"unexpected peer " MACSTR,
	280	MAC2STR(data->auth.peer));
	281	return;
	282	}
	283
	284	wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
	285	" auth_type=%d status_code=%d",
	286	MAC2STR(data->auth.peer), data->auth.auth_type,
	287	data->auth.status_code);
	288	wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
	289	data->auth.ies, data->auth.ies_len);
	290
	291	if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
	292	wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
	293	"code %d)", data->auth.status_code);
cb1583f6 SO	294
	295	if (data->auth.status_code !=
	296	WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG \|\|
	297	wpa_s->sme.auth_alg == data->auth.auth_type \|\|
	298	wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP)
	299	return;
	300
	301	switch (data->auth.auth_type) {
	302	case WLAN_AUTH_OPEN:
	303	wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
	304
	305	wpa_printf(MSG_DEBUG, "SME: Trying SHARED auth");
	306	wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
	307	wpa_s->current_ssid);
	308	return;
	309
	310	case WLAN_AUTH_SHARED_KEY:
	311	wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
	312
	313	wpa_printf(MSG_DEBUG, "SME: Trying LEAP auth");
	314	wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
	315	wpa_s->current_ssid);
	316	return;
	317
	318	default:
	319	return;
	320	}
c2a04078 JM	321	}
	322
	323	#ifdef CONFIG_IEEE80211R
	324	if (data->auth.auth_type == WLAN_AUTH_FT) {
	325	union wpa_event_data edata;
	326	os_memset(&edata, 0, sizeof(edata));
	327	edata.ft_ies.ies = data->auth.ies;
	328	edata.ft_ies.ies_len = data->auth.ies_len;
	329	os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
	330	wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
	331	}
	332	#endif /* CONFIG_IEEE80211R */
	333
71024cb2 JM	334	sme_associate(wpa_s, ssid->mode, data->auth.peer,
	335	data->auth.auth_type);
	336	}
	337
	338
	339	void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
	340	const u8 *bssid, u16 auth_type)
	341	{
	342	struct wpa_driver_associate_params params;
d9a27b04	343	struct ieee802_11_elems elems;
71024cb2	344
c2a04078	345	os_memset(&params, 0, sizeof(params));
71024cb2	346	params.bssid = bssid;
c2a04078 JM	347	params.ssid = wpa_s->sme.ssid;
	348	params.ssid_len = wpa_s->sme.ssid_len;
	349	params.freq = wpa_s->sme.freq;
	350	params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
	351	wpa_s->sme.assoc_req_ie : NULL;
	352	params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
	353	#ifdef CONFIG_IEEE80211R
71024cb2	354	if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
c2a04078 JM	355	params.wpa_ie = wpa_s->sme.ft_ies;
	356	params.wpa_ie_len = wpa_s->sme.ft_ies_len;
	357	}
	358	#endif /* CONFIG_IEEE80211R */
71024cb2	359	params.mode = mode;
c2a04078	360	params.mgmt_frame_protection = wpa_s->sme.mfp;
62fa124c JM	361	if (wpa_s->sme.prev_bssid_set)
62fa124c JM	362	params.prev_bssid = wpa_s->sme.prev_bssid;
c2a04078 JM	363
	364	wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
	365	" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
	366	params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
	367	params.freq);
	368
	369	wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
	370
9efc3f2a JM	371	if (params.wpa_ie == NULL \|\|
9efc3f2a JM	372	ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
d9a27b04 JM	373	< 0) {
	374	wpa_printf(MSG_DEBUG, "SME: Could not parse own IEs?!");
	375	os_memset(&elems, 0, sizeof(elems));
	376	}
	377	if (elems.rsn_ie)
	378	wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
	379	elems.rsn_ie_len + 2);
	380	else if (elems.wpa_ie)
	381	wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
	382	elems.wpa_ie_len + 2);
	383	else
	384	wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
6e3f4b89 JM	385	if (elems.p2p &&
	386	(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
	387	params.p2p = 1;
d9a27b04	388
c2a04078 JM	389	if (wpa_drv_associate(wpa_s, &params) < 0) {
	390	wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
	391	"failed");
b85e7724	392	wpa_supplicant_req_scan(wpa_s, 5, 0);
c2a04078 JM	393	return;
	394	}
	395
	396	/* TODO: add timeout on association */
	397	}
	398
	399
	400	int sme_update_ft_ies(struct wpa_supplicant wpa_s, const u8 md,
	401	const u8 *ies, size_t ies_len)
	402	{
	403	if (md == NULL \|\| ies == NULL) {
	404	wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
	405	os_free(wpa_s->sme.ft_ies);
	406	wpa_s->sme.ft_ies = NULL;
	407	wpa_s->sme.ft_ies_len = 0;
	408	wpa_s->sme.ft_used = 0;
	409	return 0;
	410	}
	411
	412	os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
	413	wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
	414	os_free(wpa_s->sme.ft_ies);
	415	wpa_s->sme.ft_ies = os_malloc(ies_len);
	416	if (wpa_s->sme.ft_ies == NULL)
	417	return -1;
	418	os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
	419	wpa_s->sme.ft_ies_len = ies_len;
	420	return 0;
	421	}
efa46078 JM	422
	423
	424	void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
	425	union wpa_event_data *data)
	426	{
8bac466b	427	int bssid_changed;
76d11d3f	428	int timeout = 5000;
8bac466b	429
76d11d3f JM	430	wpa_printf(MSG_DEBUG, "SME: Association with " MACSTR " failed: "
76d11d3f JM	431	"status code %d", MAC2STR(wpa_s->pending_bssid),
efa46078 JM	432	data->assoc_reject.status_code);
efa46078 JM	433
8bac466b	434	bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
76d11d3f JM	435
	436	/*
	437	* For now, unconditionally terminate the previous authentication. In
	438	* theory, this should not be needed, but mac80211 gets quite confused
	439	* if the authentication is left pending.. Some roaming cases might
	440	* benefit from using the previous authentication, so this could be
	441	* optimized in the future.
	442	*/
	443	if (wpa_drv_deauthenticate(wpa_s, wpa_s->pending_bssid,
	444	WLAN_REASON_DEAUTH_LEAVING) < 0) {
	445	wpa_msg(wpa_s, MSG_INFO,
	446	"Deauth request to the driver failed");
	447	}
62fa124c	448	wpa_s->sme.prev_bssid_set = 0;
76d11d3f JM	449
	450	if (wpa_blacklist_add(wpa_s, wpa_s->pending_bssid) == 0) {
	451	struct wpa_blacklist *b;
	452	b = wpa_blacklist_get(wpa_s, wpa_s->pending_bssid);
	453	if (b && b->count < 3) {
	454	/*
	455	* Speed up next attempt if there could be other APs
	456	* that could accept association.
	457	*/
	458	timeout = 100;
	459	}
	460	}
	461	wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
efa46078 JM	462	os_memset(wpa_s->bssid, 0, ETH_ALEN);
efa46078 JM	463	os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
8bac466b JM	464	if (bssid_changed)
8bac466b JM	465	wpas_notify_bssid_changed(wpa_s);
efa46078 JM	466
	467	/*
	468	* TODO: if more than one possible AP is available in scan results,
	469	* could try the other ones before requesting a new scan.
	470	*/
76d11d3f JM	471	wpa_supplicant_req_scan(wpa_s, timeout / 1000,
76d11d3f JM	472	1000 * (timeout % 1000));
efa46078	473	}
da1fb17c JM	474
	475
	476	void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
	477	union wpa_event_data *data)
	478	{
	479	wpa_printf(MSG_DEBUG, "SME: Authentication timed out");
	480	wpa_supplicant_req_scan(wpa_s, 5, 0);
	481	}
	482
	483
	484	void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
	485	union wpa_event_data *data)
	486	{
	487	wpa_printf(MSG_DEBUG, "SME: Association timed out");
	488	wpa_supplicant_mark_disassoc(wpa_s);
	489	wpa_supplicant_req_scan(wpa_s, 5, 0);
	490	}
a84ed99e JM	491
	492
	493	void sme_event_disassoc(struct wpa_supplicant *wpa_s,
	494	union wpa_event_data *data)
	495	{
	496	wpa_printf(MSG_DEBUG, "SME: Disassociation event received");
7e26053a	497	if (wpa_s->sme.prev_bssid_set &&
a84ed99e JM	498	!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_USER_SPACE_MLME)) {
	499	/*
	500	* cfg80211/mac80211 can get into somewhat confused state if
	501	* the AP only disassociates us and leaves us in authenticated
	502	* state. For now, force the state to be cleared to avoid
	503	* confusing errors if we try to associate with the AP again.
	504	*/
	505	wpa_printf(MSG_DEBUG, "SME: Deauthenticate to clear driver "
	506	"state");
7e26053a	507	wpa_drv_deauthenticate(wpa_s, wpa_s->sme.prev_bssid,
a84ed99e JM	508	WLAN_REASON_DEAUTH_LEAVING);
	509	}
	510	}