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-rw-r--r--contrib/wpa/wpa_supplicant/sme.c490
1 files changed, 490 insertions, 0 deletions
diff --git a/contrib/wpa/wpa_supplicant/sme.c b/contrib/wpa/wpa_supplicant/sme.c
new file mode 100644
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--- /dev/null
+++ b/contrib/wpa/wpa_supplicant/sme.c
@@ -0,0 +1,490 @@
+/*
+ * 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 "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 */
+
+ 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 (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);
+ }
+}
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