e5ad96b745
mac80211 can indicate this mainly because of channel selection conflicts with other vifs. If there is another BSS on another channel, we should try to connect to it instead.
500 lines
15 KiB
C
500 lines
15 KiB
C
/*
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* wpa_supplicant - SME
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* Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "common/ieee802_11_defs.h"
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#include "common/ieee802_11_common.h"
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#include "eapol_supp/eapol_supp_sm.h"
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#include "common/wpa_common.h"
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#include "rsn_supp/wpa.h"
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#include "rsn_supp/pmksa_cache.h"
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#include "config.h"
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#include "wpa_supplicant_i.h"
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#include "driver_i.h"
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#include "wpas_glue.h"
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#include "wps_supplicant.h"
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#include "p2p_supplicant.h"
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#include "notify.h"
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#include "blacklist.h"
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#include "bss.h"
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#include "scan.h"
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#include "sme.h"
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void sme_authenticate(struct wpa_supplicant *wpa_s,
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struct wpa_bss *bss, struct wpa_ssid *ssid)
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{
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struct wpa_driver_auth_params params;
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struct wpa_ssid *old_ssid;
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#ifdef CONFIG_IEEE80211R
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const u8 *ie;
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#endif /* CONFIG_IEEE80211R */
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#ifdef CONFIG_IEEE80211R
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const u8 *md = NULL;
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#endif /* CONFIG_IEEE80211R */
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int i, bssid_changed;
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if (bss == NULL) {
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wpa_printf(MSG_ERROR, "SME: No scan result available for the "
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"network");
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return;
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}
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wpa_s->current_bss = bss;
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os_memset(¶ms, 0, sizeof(params));
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wpa_s->reassociate = 0;
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params.freq = bss->freq;
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params.bssid = bss->bssid;
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params.ssid = bss->ssid;
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params.ssid_len = bss->ssid_len;
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if (wpa_s->sme.ssid_len != params.ssid_len ||
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os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
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wpa_s->sme.prev_bssid_set = 0;
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wpa_s->sme.freq = params.freq;
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os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
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wpa_s->sme.ssid_len = params.ssid_len;
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params.auth_alg = WPA_AUTH_ALG_OPEN;
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#ifdef IEEE8021X_EAPOL
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if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
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if (ssid->leap) {
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if (ssid->non_leap == 0)
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params.auth_alg = WPA_AUTH_ALG_LEAP;
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else
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params.auth_alg |= WPA_AUTH_ALG_LEAP;
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}
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}
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#endif /* IEEE8021X_EAPOL */
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wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
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params.auth_alg);
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if (ssid->auth_alg) {
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params.auth_alg = ssid->auth_alg;
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wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
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params.auth_alg);
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}
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for (i = 0; i < NUM_WEP_KEYS; i++) {
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if (ssid->wep_key_len[i])
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params.wep_key[i] = ssid->wep_key[i];
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params.wep_key_len[i] = ssid->wep_key_len[i];
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}
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params.wep_tx_keyidx = ssid->wep_tx_keyidx;
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bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
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os_memset(wpa_s->bssid, 0, ETH_ALEN);
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os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
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if (bssid_changed)
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wpas_notify_bssid_changed(wpa_s);
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if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
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wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
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(ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
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WPA_KEY_MGMT_FT_IEEE8021X |
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WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_IEEE8021X_SHA256 |
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WPA_KEY_MGMT_PSK_SHA256))) {
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int try_opportunistic;
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try_opportunistic = ssid->proactive_key_caching &&
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(ssid->proto & WPA_PROTO_RSN);
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if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
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wpa_s->current_ssid,
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try_opportunistic) == 0)
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eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
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wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
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if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
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wpa_s->sme.assoc_req_ie,
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&wpa_s->sme.assoc_req_ie_len)) {
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wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
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"management and encryption suites");
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return;
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}
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} else if (ssid->key_mgmt &
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(WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
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WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
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WPA_KEY_MGMT_IEEE8021X_SHA256)) {
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wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
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if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
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wpa_s->sme.assoc_req_ie,
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&wpa_s->sme.assoc_req_ie_len)) {
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wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
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"management and encryption suites (no scan "
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"results)");
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return;
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}
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#ifdef CONFIG_WPS
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} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
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struct wpabuf *wps_ie;
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wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
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if (wps_ie && wpabuf_len(wps_ie) <=
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sizeof(wpa_s->sme.assoc_req_ie)) {
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wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
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os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
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wpa_s->sme.assoc_req_ie_len);
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} else
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wpa_s->sme.assoc_req_ie_len = 0;
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wpabuf_free(wps_ie);
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wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
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#endif /* CONFIG_WPS */
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} else {
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wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
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wpa_s->sme.assoc_req_ie_len = 0;
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}
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#ifdef CONFIG_IEEE80211R
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ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
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if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
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md = ie + 2;
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wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
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if (md) {
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/* Prepare for the next transition */
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wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
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}
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if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_FT_IEEE8021X)) {
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if (wpa_s->sme.assoc_req_ie_len + 5 <
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sizeof(wpa_s->sme.assoc_req_ie)) {
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struct rsn_mdie *mdie;
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u8 *pos = wpa_s->sme.assoc_req_ie +
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wpa_s->sme.assoc_req_ie_len;
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*pos++ = WLAN_EID_MOBILITY_DOMAIN;
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*pos++ = sizeof(*mdie);
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mdie = (struct rsn_mdie *) pos;
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os_memcpy(mdie->mobility_domain, md,
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MOBILITY_DOMAIN_ID_LEN);
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mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
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wpa_s->sme.assoc_req_ie_len += 5;
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}
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if (wpa_s->sme.ft_used &&
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os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
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wpa_sm_has_ptk(wpa_s->wpa)) {
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wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
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"over-the-air");
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params.auth_alg = WPA_AUTH_ALG_FT;
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params.ie = wpa_s->sme.ft_ies;
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params.ie_len = wpa_s->sme.ft_ies_len;
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}
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}
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#endif /* CONFIG_IEEE80211R */
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#ifdef CONFIG_IEEE80211W
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wpa_s->sme.mfp = ssid->ieee80211w;
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if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
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const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
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struct wpa_ie_data _ie;
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if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
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_ie.capabilities &
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(WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
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wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
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"require MFP");
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wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
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}
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}
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#endif /* CONFIG_IEEE80211W */
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#ifdef CONFIG_P2P
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if (wpa_s->global->p2p) {
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u8 *pos;
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size_t len;
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int res;
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int p2p_group;
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p2p_group = wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE;
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pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
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len = sizeof(wpa_s->sme.assoc_req_ie) -
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wpa_s->sme.assoc_req_ie_len;
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res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len, p2p_group);
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if (res >= 0)
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wpa_s->sme.assoc_req_ie_len += res;
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}
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#endif /* CONFIG_P2P */
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wpa_supplicant_cancel_scan(wpa_s);
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wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
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" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
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wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
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wpa_clear_keys(wpa_s, bss->bssid);
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wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
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old_ssid = wpa_s->current_ssid;
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wpa_s->current_ssid = ssid;
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wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
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wpa_supplicant_initiate_eapol(wpa_s);
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if (old_ssid != wpa_s->current_ssid)
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wpas_notify_network_changed(wpa_s);
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wpa_s->sme.auth_alg = params.auth_alg;
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if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
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wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
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"driver failed");
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wpa_supplicant_req_scan(wpa_s, 1, 0);
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return;
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}
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/* TODO: add timeout on authentication */
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/*
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* Association will be started based on the authentication event from
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* the driver.
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*/
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}
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void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
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{
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struct wpa_ssid *ssid = wpa_s->current_ssid;
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if (ssid == NULL) {
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wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
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"network is not selected");
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return;
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}
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if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
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wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
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"not in authenticating state");
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return;
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}
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if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
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wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
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"unexpected peer " MACSTR,
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MAC2STR(data->auth.peer));
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return;
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}
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wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
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" auth_type=%d status_code=%d",
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MAC2STR(data->auth.peer), data->auth.auth_type,
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data->auth.status_code);
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wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
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data->auth.ies, data->auth.ies_len);
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if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
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wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
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"code %d)", data->auth.status_code);
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if (data->auth.status_code !=
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WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG ||
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wpa_s->sme.auth_alg == data->auth.auth_type ||
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wpa_s->current_ssid->auth_alg == WPA_AUTH_ALG_LEAP) {
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wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
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return;
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}
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switch (data->auth.auth_type) {
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case WLAN_AUTH_OPEN:
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wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_SHARED;
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wpa_printf(MSG_DEBUG, "SME: Trying SHARED auth");
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wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
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wpa_s->current_ssid);
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return;
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case WLAN_AUTH_SHARED_KEY:
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wpa_s->current_ssid->auth_alg = WPA_AUTH_ALG_LEAP;
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wpa_printf(MSG_DEBUG, "SME: Trying LEAP auth");
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wpa_supplicant_associate(wpa_s, wpa_s->current_bss,
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wpa_s->current_ssid);
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return;
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default:
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return;
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}
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}
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#ifdef CONFIG_IEEE80211R
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if (data->auth.auth_type == WLAN_AUTH_FT) {
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union wpa_event_data edata;
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os_memset(&edata, 0, sizeof(edata));
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edata.ft_ies.ies = data->auth.ies;
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edata.ft_ies.ies_len = data->auth.ies_len;
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os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
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wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
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}
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#endif /* CONFIG_IEEE80211R */
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sme_associate(wpa_s, ssid->mode, data->auth.peer,
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data->auth.auth_type);
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}
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void sme_associate(struct wpa_supplicant *wpa_s, enum wpas_mode mode,
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const u8 *bssid, u16 auth_type)
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{
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struct wpa_driver_associate_params params;
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struct ieee802_11_elems elems;
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os_memset(¶ms, 0, sizeof(params));
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params.bssid = bssid;
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params.ssid = wpa_s->sme.ssid;
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params.ssid_len = wpa_s->sme.ssid_len;
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params.freq = wpa_s->sme.freq;
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params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
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wpa_s->sme.assoc_req_ie : NULL;
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params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
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#ifdef CONFIG_IEEE80211R
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if (auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
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params.wpa_ie = wpa_s->sme.ft_ies;
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params.wpa_ie_len = wpa_s->sme.ft_ies_len;
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}
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#endif /* CONFIG_IEEE80211R */
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params.mode = mode;
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params.mgmt_frame_protection = wpa_s->sme.mfp;
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if (wpa_s->sme.prev_bssid_set)
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params.prev_bssid = wpa_s->sme.prev_bssid;
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wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
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" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
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params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
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params.freq);
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wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
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if (params.wpa_ie == NULL ||
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ieee802_11_parse_elems(params.wpa_ie, params.wpa_ie_len, &elems, 0)
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< 0) {
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wpa_printf(MSG_DEBUG, "SME: Could not parse own IEs?!");
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os_memset(&elems, 0, sizeof(elems));
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}
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if (elems.rsn_ie)
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wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.rsn_ie - 2,
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elems.rsn_ie_len + 2);
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else if (elems.wpa_ie)
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wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, elems.wpa_ie - 2,
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elems.wpa_ie_len + 2);
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else
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wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
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if (elems.p2p &&
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(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE))
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params.p2p = 1;
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if (wpa_s->parent->set_sta_uapsd)
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params.uapsd = wpa_s->parent->sta_uapsd;
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else
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params.uapsd = -1;
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if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
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wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
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"failed");
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wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
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os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
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return;
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}
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/* TODO: add timeout on association */
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}
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|
|
|
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;
|
|
|
|
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;
|
|
|
|
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
|
|
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);
|
|
}
|
|
|
|
|
|
void sme_event_auth_timed_out(struct wpa_supplicant *wpa_s,
|
|
union wpa_event_data *data)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "SME: Authentication timed out");
|
|
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
|
|
}
|
|
|
|
|
|
void sme_event_assoc_timed_out(struct wpa_supplicant *wpa_s,
|
|
union wpa_event_data *data)
|
|
{
|
|
wpa_printf(MSG_DEBUG, "SME: Association timed out");
|
|
wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
|
|
wpa_supplicant_mark_disassoc(wpa_s);
|
|
}
|
|
|
|
|
|
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);
|
|
}
|
|
}
|