3 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #include "ieee802_11_defs.h"
19 #include "eapol_supp/eapol_supp_sm.h"
20 #include "wpa_common.h"
22 #include "pmksa_cache.h"
24 #include "wpa_supplicant_i.h"
26 #include "wpas_glue.h"
27 #include "wps_supplicant.h"
30 void sme_authenticate(struct wpa_supplicant *wpa_s,
31 struct wpa_scan_res *bss, struct wpa_ssid *ssid)
33 struct wpa_driver_auth_params params;
35 #ifdef CONFIG_IEEE80211R
37 #endif /* CONFIG_IEEE80211R */
41 wpa_printf(MSG_ERROR, "SME: No scan result available for the "
46 os_memset(¶ms, 0, sizeof(params));
47 wpa_s->reassociate = 0;
49 params.freq = bss->freq;
50 params.bssid = bss->bssid;
51 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
53 wpa_printf(MSG_ERROR, "SME: SSID not available for the BSS");
57 params.ssid_len = ie[1];
59 wpa_s->sme.freq = params.freq;
60 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
61 wpa_s->sme.ssid_len = params.ssid_len;
63 params.auth_alg = AUTH_ALG_OPEN_SYSTEM;
64 #ifdef IEEE8021X_EAPOL
65 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
67 if (ssid->non_leap == 0)
68 params.auth_alg = AUTH_ALG_LEAP;
70 params.auth_alg |= AUTH_ALG_LEAP;
73 #endif /* IEEE8021X_EAPOL */
74 wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
78 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
79 params.auth_alg |= AUTH_ALG_OPEN_SYSTEM;
80 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
81 params.auth_alg |= AUTH_ALG_SHARED_KEY;
82 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
83 params.auth_alg |= AUTH_ALG_LEAP;
84 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
88 for (i = 0; i < NUM_WEP_KEYS; i++) {
89 if (ssid->wep_key_len[i])
90 params.wep_key[i] = ssid->wep_key[i];
91 params.wep_key_len[i] = ssid->wep_key_len[i];
93 params.wep_tx_keyidx = ssid->wep_tx_keyidx;
95 os_memset(wpa_s->bssid, 0, ETH_ALEN);
96 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
98 if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
99 wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
100 (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
101 WPA_KEY_MGMT_FT_IEEE8021X |
102 WPA_KEY_MGMT_FT_PSK |
103 WPA_KEY_MGMT_IEEE8021X_SHA256 |
104 WPA_KEY_MGMT_PSK_SHA256))) {
105 int try_opportunistic;
106 try_opportunistic = ssid->proactive_key_caching &&
107 (ssid->proto & WPA_PROTO_RSN);
108 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
110 try_opportunistic) == 0)
111 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
112 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
113 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
114 wpa_s->sme.assoc_req_ie,
115 &wpa_s->sme.assoc_req_ie_len)) {
116 wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
117 "management and encryption suites");
120 } else if (ssid->key_mgmt &
121 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
122 WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
123 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
124 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
125 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
126 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
127 wpa_s->sme.assoc_req_ie,
128 &wpa_s->sme.assoc_req_ie_len)) {
129 wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
130 "management and encryption suites (no scan "
135 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
136 struct wpabuf *wps_ie;
137 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
138 if (wps_ie && wpabuf_len(wps_ie) <=
139 sizeof(wpa_s->sme.assoc_req_ie)) {
140 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
141 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
142 wpa_s->sme.assoc_req_ie_len);
144 wpa_s->sme.assoc_req_ie_len = 0;
146 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
147 #endif /* CONFIG_WPS */
149 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
150 wpa_s->sme.assoc_req_ie_len = 0;
153 #ifdef CONFIG_IEEE80211R
154 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
155 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
157 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
159 /* Prepare for the next transition */
160 wpa_ft_prepare_auth_request(wpa_s->wpa);
163 if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
164 WPA_KEY_MGMT_FT_IEEE8021X)) {
165 if (wpa_s->sme.assoc_req_ie_len + 5 <
166 sizeof(wpa_s->sme.assoc_req_ie)) {
167 struct rsn_mdie *mdie;
168 u8 *pos = wpa_s->sme.assoc_req_ie +
169 wpa_s->sme.assoc_req_ie_len;
170 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
171 *pos++ = sizeof(*mdie);
172 mdie = (struct rsn_mdie *) pos;
173 os_memcpy(mdie->mobility_domain, md,
174 MOBILITY_DOMAIN_ID_LEN);
176 wpa_s->sme.assoc_req_ie_len += 5;
179 if (wpa_s->sme.ft_used &&
180 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0) {
181 wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
183 params.auth_alg = AUTH_ALG_FT;
184 params.ie = wpa_s->sme.ft_ies;
185 params.ie_len = wpa_s->sme.ft_ies_len;
188 #endif /* CONFIG_IEEE80211R */
190 #ifdef CONFIG_IEEE80211W
191 switch (ssid->ieee80211w) {
193 wpa_s->sme.mfp = NO_MGMT_FRAME_PROTECTION;
195 case IEEE80211W_OPTIONAL:
196 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_OPTIONAL;
198 case IEEE80211W_REQUIRED:
199 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
202 if (ssid->ieee80211w != NO_IEEE80211W && bss) {
203 const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
204 struct wpa_ie_data _ie;
205 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
207 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
208 wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
210 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
213 #endif /* CONFIG_IEEE80211W */
215 wpa_supplicant_cancel_scan(wpa_s);
217 wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
218 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
219 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
221 wpa_clear_keys(wpa_s, bss->bssid);
222 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
223 wpa_s->current_ssid = ssid;
224 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
225 wpa_supplicant_initiate_eapol(wpa_s);
227 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
228 wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
233 /* TODO: add timeout on authentication */
236 * Association will be started based on the authentication event from
242 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
244 struct wpa_driver_associate_params params;
245 struct wpa_ssid *ssid = wpa_s->current_ssid;
248 wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
249 "network is not selected");
253 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
254 wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
255 "not in authenticating state");
259 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
260 wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
261 "unexpected peer " MACSTR,
262 MAC2STR(data->auth.peer));
266 wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
267 " auth_type=%d status_code=%d",
268 MAC2STR(data->auth.peer), data->auth.auth_type,
269 data->auth.status_code);
270 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
271 data->auth.ies, data->auth.ies_len);
273 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
274 wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
275 "code %d)", data->auth.status_code);
279 #ifdef CONFIG_IEEE80211R
280 if (data->auth.auth_type == WLAN_AUTH_FT) {
281 union wpa_event_data edata;
282 os_memset(&edata, 0, sizeof(edata));
283 edata.ft_ies.ies = data->auth.ies;
284 edata.ft_ies.ies_len = data->auth.ies_len;
285 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
286 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
288 #endif /* CONFIG_IEEE80211R */
290 os_memset(¶ms, 0, sizeof(params));
291 params.bssid = data->auth.peer;
292 params.ssid = wpa_s->sme.ssid;
293 params.ssid_len = wpa_s->sme.ssid_len;
294 params.freq = wpa_s->sme.freq;
295 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
296 wpa_s->sme.assoc_req_ie : NULL;
297 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
298 #ifdef CONFIG_IEEE80211R
299 if (data->auth.auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
300 params.wpa_ie = wpa_s->sme.ft_ies;
301 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
303 #endif /* CONFIG_IEEE80211R */
304 params.mode = ssid->mode;
305 params.mgmt_frame_protection = wpa_s->sme.mfp;
307 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
308 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
309 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
312 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
314 if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
315 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
320 /* TODO: add timeout on association */
324 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
325 const u8 *ies, size_t ies_len)
327 if (md == NULL || ies == NULL) {
328 wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
329 os_free(wpa_s->sme.ft_ies);
330 wpa_s->sme.ft_ies = NULL;
331 wpa_s->sme.ft_ies_len = 0;
332 wpa_s->sme.ft_used = 0;
336 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
337 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
338 os_free(wpa_s->sme.ft_ies);
339 wpa_s->sme.ft_ies = os_malloc(ies_len);
340 if (wpa_s->sme.ft_ies == NULL)
342 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
343 wpa_s->sme.ft_ies_len = ies_len;
348 void sme_event_assoc_reject(struct wpa_supplicant *wpa_s,
349 union wpa_event_data *data)
351 wpa_printf(MSG_DEBUG, "SME: Association failed: status code %d",
352 data->assoc_reject.status_code);
354 wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
355 os_memset(wpa_s->bssid, 0, ETH_ALEN);
356 os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
359 * TODO: if more than one possible AP is available in scan results,
360 * could try the other ones before requesting a new scan.
362 wpa_supplicant_req_scan(wpa_s, 5, 0);