Exemplo n.º 1
0
Arquivo: events.c Projeto: AxelLin/Drv
static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
{
	struct wpa_ie_data ie;
	int i, pmksa_set = -1;

	if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
	    ie.pmkid == NULL)
		return;

	for (i = 0; i < ie.num_pmkid; i++) {
		pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
						    ie.pmkid + i * PMKID_LEN,
						    NULL, NULL, 0);
		if (pmksa_set == 0) {
			eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
			break;
		}
	}

	wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
		   "cache", pmksa_set == 0 ? "" : "not ");
}
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 defined(ANDROID_P2P) && defined(WIFI_EAGLE)
        int freq = 0;   
#endif /* ANDROID_P2P && WIFI_EAGLE */
	if (bss == NULL) {
		wpa_msg(wpa_s, 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;
	params.p2p = ssid->p2p_group;

	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_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
		params.auth_alg);
	if (ssid->auth_alg) {
		params.auth_alg = ssid->auth_alg;
		wpa_dbg(wpa_s, 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)) &&
	    wpa_key_mgmt_wpa(ssid->key_mgmt)) {
		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_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
				"key management and encryption suites");
			return;
		}
	} else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
		   wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
		/*
		 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
		 * use non-WPA since the scan results did not indicate that the
		 * AP is using WPA or WPA2.
		 */
		wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
		wpa_s->sme.assoc_req_ie_len = 0;
	} else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
		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_msg(wpa_s, 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 && wpa_key_mgmt_ft(ssid->key_mgmt)) {
		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_dbg(wpa_s, 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_dbg(wpa_s, MSG_DEBUG, "SME: 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;
		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,
					    ssid->p2p_group);
		if (res >= 0)
			wpa_s->sme.assoc_req_ie_len += res;
	}
#endif /* CONFIG_P2P */

#ifdef CONFIG_HS20
	if (wpa_s->conf->hs20) {
		struct wpabuf *hs20;
		hs20 = wpabuf_alloc(20);
		if (hs20) {
			wpas_hs20_add_indication(hs20);
			os_memcpy(wpa_s->sme.assoc_req_ie +
				  wpa_s->sme.assoc_req_ie_len,
				  wpabuf_head(hs20), wpabuf_len(hs20));
			wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
			wpabuf_free(hs20);
		}
	}
#endif /* CONFIG_HS20 */

#ifdef CONFIG_INTERWORKING
	if (wpa_s->conf->interworking) {
		u8 *pos = wpa_s->sme.assoc_req_ie;
		if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
			pos += 2 + pos[1];
		os_memmove(pos + 6, pos,
			   wpa_s->sme.assoc_req_ie_len -
			   (pos - wpa_s->sme.assoc_req_ie));
		wpa_s->sme.assoc_req_ie_len += 6;
		*pos++ = WLAN_EID_EXT_CAPAB;
		*pos++ = 4;
		*pos++ = 0x00;
		*pos++ = 0x00;
		*pos++ = 0x00;
		*pos++ = 0x80; /* Bit 31 - Interworking */
	}
#endif /* CONFIG_INTERWORKING */

	wpa_supplicant_cancel_sched_scan(wpa_s);
	wpa_supplicant_cancel_scan(wpa_s);

	wpa_msg(wpa_s, MSG_INFO, "SME: 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 defined(ANDROID_P2P) && defined(WIFI_EAGLE)
	/* If multichannel concurrency is not supported, check for any frequency
	 * conflict and take appropriate action.
	 */
	wpa_printf(MSG_DEBUG, "%s EAGLE: Priority choose", __func__);

	if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT) &&
		((freq = wpa_drv_shared_freq(wpa_s)) > 0) && (freq != params.freq)) {
		wpa_printf(MSG_DEBUG, "Shared interface with conflicting frequency found (%d != %d)"
				, freq, params.freq);
		if (wpas_p2p_handle_frequency_conflicts(wpa_s, params.freq) < 0) {
			/* Handling conflicts failed. Disable the current connect req and
			 * notify the userspace to take appropriate action */
			wpa_printf(MSG_DEBUG, "proiritize is not set. Notifying user space to handle the case");
			wpa_supplicant_disable_network(wpa_s, ssid);
			wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_FREQ_CONFLICT
				" id=%d", ssid->id);
			os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
			return;
		}
	}
#endif /* ANDROID_P2P && WIFI_EAGLE */

	if (wpa_drv_authenticate(wpa_s, &params) < 0) {
		wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
			"driver failed");
		wpas_connection_failed(wpa_s, bss->bssid);
		wpa_supplicant_mark_disassoc(wpa_s);
		return;
	}

	eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
			       NULL);

	/*
	 * Association will be started based on the authentication event from
	 * the driver.
	 */
}
static void sme_send_authentication(struct wpa_supplicant *wpa_s,
				    struct wpa_bss *bss, struct wpa_ssid *ssid,
				    int start)
{
	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;
	struct wpabuf *resp = NULL;
	u8 ext_capab[18];
	int ext_capab_len;
	int skip_auth;

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

	skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
		wpa_s->reassoc_same_bss;
	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;
	params.p2p = ssid->p2p_group;

	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_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
		params.auth_alg);
	if (ssid->auth_alg) {
		params.auth_alg = ssid->auth_alg;
		wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
			"0x%x", params.auth_alg);
	}
#ifdef CONFIG_SAE
	wpa_s->sme.sae_pmksa_caching = 0;
	if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
		const u8 *rsn;
		struct wpa_ie_data ied;

		rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
		if (!rsn) {
			wpa_dbg(wpa_s, MSG_DEBUG,
				"SAE enabled, but target BSS does not advertise RSN");
		} else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
			   wpa_key_mgmt_sae(ied.key_mgmt)) {
			wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
			params.auth_alg = WPA_AUTH_ALG_SAE;
		} else {
			wpa_dbg(wpa_s, MSG_DEBUG,
				"SAE enabled, but target BSS does not advertise SAE AKM for RSN");
		}
	}
#endif /* CONFIG_SAE */

	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)) &&
	    wpa_key_mgmt_wpa(ssid->key_mgmt)) {
		int try_opportunistic;
		try_opportunistic = (ssid->proactive_key_caching < 0 ?
				     wpa_s->conf->okc :
				     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);
		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_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
				"key management and encryption suites");
			wpas_connect_work_done(wpa_s);
			return;
		}
	} else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
		   wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
		/*
		 * Both WPA and non-WPA IEEE 802.1X enabled in configuration -
		 * use non-WPA since the scan results did not indicate that the
		 * AP is using WPA or WPA2.
		 */
		wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
		wpa_s->sme.assoc_req_ie_len = 0;
	} else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
		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_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
				"key management and encryption suites (no "
				"scan results)");
			wpas_connect_work_done(wpa_s);
			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 && wpa_key_mgmt_ft(ssid->key_mgmt)) {
		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_dbg(wpa_s, 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 = wpas_get_ssid_pmf(wpa_s, ssid);
	if (wpa_s->sme.mfp != 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_dbg(wpa_s, MSG_DEBUG, "SME: 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;
		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,
					    ssid->p2p_group);
		if (res >= 0)
			wpa_s->sme.assoc_req_ie_len += res;
	}
#endif /* CONFIG_P2P */

#ifdef CONFIG_HS20
	if (is_hs20_network(wpa_s, ssid, bss)) {
		struct wpabuf *hs20;
		hs20 = wpabuf_alloc(20);
		if (hs20) {
			int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
			size_t len;

			wpas_hs20_add_indication(hs20, pps_mo_id);
			len = sizeof(wpa_s->sme.assoc_req_ie) -
				wpa_s->sme.assoc_req_ie_len;
			if (wpabuf_len(hs20) <= len) {
				os_memcpy(wpa_s->sme.assoc_req_ie +
					  wpa_s->sme.assoc_req_ie_len,
					  wpabuf_head(hs20), wpabuf_len(hs20));
				wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
			}
			wpabuf_free(hs20);
		}
	}
#endif /* CONFIG_HS20 */

	ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
					     sizeof(ext_capab));
	if (ext_capab_len > 0) {
		u8 *pos = wpa_s->sme.assoc_req_ie;
		if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
			pos += 2 + pos[1];
		os_memmove(pos + ext_capab_len, pos,
			   wpa_s->sme.assoc_req_ie_len -
			   (pos - wpa_s->sme.assoc_req_ie));
		wpa_s->sme.assoc_req_ie_len += ext_capab_len;
		os_memcpy(pos, ext_capab, ext_capab_len);
	}

	if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
		struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
		size_t len;

		len = sizeof(wpa_s->sme.assoc_req_ie) -
			wpa_s->sme.assoc_req_ie_len;
		if (wpabuf_len(buf) <= len) {
			os_memcpy(wpa_s->sme.assoc_req_ie +
				  wpa_s->sme.assoc_req_ie_len,
				  wpabuf_head(buf), wpabuf_len(buf));
			wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
		}
	}

	sme_auth_handle_rrm(wpa_s, bss);

#ifdef CONFIG_SAE
	if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
	    pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0) == 0)
	{
		wpa_dbg(wpa_s, MSG_DEBUG,
			"PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
		params.auth_alg = WPA_AUTH_ALG_OPEN;
		wpa_s->sme.sae_pmksa_caching = 1;
	}

	if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
		if (start)
			resp = sme_auth_build_sae_commit(wpa_s, ssid,
							 bss->bssid);
		else
			resp = sme_auth_build_sae_confirm(wpa_s);
		if (resp == NULL) {
			wpas_connection_failed(wpa_s, bss->bssid, 1);
			return;
		}
		params.sae_data = wpabuf_head(resp);
		params.sae_data_len = wpabuf_len(resp);
		wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
	}
#endif /* CONFIG_SAE */

	wpa_supplicant_cancel_sched_scan(wpa_s);
	wpa_supplicant_cancel_scan(wpa_s);

	wpa_msg(wpa_s, MSG_INFO, "SME: 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);

#ifdef CONFIG_P2P
	/*
	 * If multi-channel concurrency is not supported, check for any
	 * frequency conflict. In case of any frequency conflict, remove the
	 * least prioritized connection.
	 */
	if (wpa_s->num_multichan_concurrent < 2) {
		int freq, num;
		num = get_shared_radio_freqs(wpa_s, &freq, 1);
		if (num > 0 && freq > 0 && freq != params.freq) {
			wpa_printf(MSG_DEBUG,
				   "Conflicting frequency found (%d != %d)",
				   freq, params.freq);
			if (wpas_p2p_handle_frequency_conflicts(wpa_s,
								params.freq,
								ssid) < 0) {
				wpas_connection_failed(wpa_s, bss->bssid, 0);
				wpa_supplicant_mark_disassoc(wpa_s);
				wpabuf_free(resp);
				wpas_connect_work_done(wpa_s);
				return;
			}
		}
	}
#endif /* CONFIG_P2P */

	if (skip_auth) {
		wpa_msg(wpa_s, MSG_DEBUG,
			"SME: Skip authentication step on reassoc-to-same-BSS");
		wpabuf_free(resp);
		sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
		return;
	}


	wpa_s->sme.auth_alg = params.auth_alg;
	if (wpa_drv_authenticate(wpa_s, &params) < 0) {
		wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
			"driver failed");
		wpas_connection_failed(wpa_s, bss->bssid, 1);
		wpa_supplicant_mark_disassoc(wpa_s);
		wpabuf_free(resp);
		wpas_connect_work_done(wpa_s);
		return;
	}

	eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
			       NULL);

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

	wpabuf_free(resp);
}
Exemplo n.º 4
0
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 */

	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.
	 */
}