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  • Committer: Bazaar Package Importer
  • Author(s): Kel Modderman
  • Date: 2008-03-12 20:03:04 UTC
  • mfrom: (1.1.10 upstream)
  • mto: This revision was merged to the branch mainline in revision 4.
  • Revision ID: james.westby@ubuntu.com-20080312200304-4331y9wj46pdd34z
Tags: 0.6.3-1
http://bugs.debian.org/466910
* New upstream release.
* Drop patches applied upstream:
  - debian/patches/30_wpa_gui_qt4_eventhistoryui_rework.patch
  - debian/patches/31_wpa_gui_qt4_eventhistory_always_scrollbar.patch
  - debian/patches/32_wpa_gui_qt4_eventhistory_scroll_with_events.patch
  - debian/patches/40_dbus_ssid_data.patch
* Tidy up the clean target of debian/rules. Now that the madwifi headers are
  handled differently we no longer need to do any cleanup.
* Fix formatting error in debian/ifupdown/wpa_action.8 to make lintian
  quieter.
* Add patch to fix formatting errors in manpages build from sgml source. Use
  <emphasis> tags to hightlight keywords instead of surrounding them in
  strong quotes.
  - debian/patches/41_manpage_format_fixes.patch
* wpasupplicant binary package no longer suggests pcscd, guessnet, iproute
  or wireless-tools, nor does it recommend dhcp3-client. These are not
  needed.
* Add debian/patches/10_silence_siocsiwauth_icotl_failure.patch to disable
  ioctl failure messages that occur under normal conditions.
* Cherry pick two upstream git commits concerning the dbus interface:
  - debian/patches/11_avoid_dbus_version_namespace.patch
  - debian/patches/12_fix_potential_use_after_free.patch
* Add debian/patches/42_manpage_explain_available_drivers.patch to explain
  that not all of the driver backends are available in the provided
  wpa_supplicant binary, and that the canonical list of supported driver
  backends can be retrieved from the wpa_supplicant -h (help) output.
  (Closes: #466910)
* Add debian/patches/20_wpa_gui_qt4_disable_link_prl.patch to remove
  link_prl CONFIG compile flag added by qmake-qt4 >= 4.3.4-2 to avoid excess
  linking.

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wpa_supplicant/events.c
 
1
/*
 
2
 * WPA Supplicant - Driver event processing
 
3
 * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
 
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"
 
18
#include "eapol_supp/eapol_supp_sm.h"
 
19
#include "wpa.h"
 
20
#include "eloop.h"
 
21
#include "drivers/driver.h"
 
22
#include "config.h"
 
23
#include "l2_packet/l2_packet.h"
 
24
#include "wpa_supplicant_i.h"
 
25
#include "pcsc_funcs.h"
 
26
#include "preauth.h"
 
27
#include "pmksa_cache.h"
 
28
#include "wpa_ctrl.h"
 
29
#include "eap_peer/eap.h"
 
30
#include "ctrl_iface_dbus.h"
 
31
#include "ieee802_11_defs.h"
 
32
#include "blacklist.h"
 
33
#include "wpas_glue.h"
 
34
 
 
35
 
 
36
static int wpa_supplicant_select_config(struct wpa_supplicant *wpa_s)
 
37
{
 
38
        struct wpa_ssid *ssid;
 
39
 
 
40
        if (wpa_s->conf->ap_scan == 1 && wpa_s->current_ssid)
 
41
                return 0;
 
42
 
 
43
        wpa_printf(MSG_DEBUG, "Select network based on association "
 
44
                   "information");
 
45
        ssid = wpa_supplicant_get_ssid(wpa_s);
 
46
        if (ssid == NULL) {
 
47
                wpa_printf(MSG_INFO, "No network configuration found for the "
 
48
                           "current AP");
 
49
                return -1;
 
50
        }
 
51
 
 
52
        if (ssid->disabled) {
 
53
                wpa_printf(MSG_DEBUG, "Selected network is disabled");
 
54
                return -1;
 
55
        }
 
56
 
 
57
        wpa_printf(MSG_DEBUG, "Network configuration found for the current "
 
58
                   "AP");
 
59
        if (ssid->key_mgmt & (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
 
60
                              WPA_KEY_MGMT_WPA_NONE |
 
61
                              WPA_KEY_MGMT_FT_PSK | WPA_KEY_MGMT_FT_IEEE8021X))
 
62
        {
 
63
                u8 wpa_ie[80];
 
64
                size_t wpa_ie_len = sizeof(wpa_ie);
 
65
                wpa_supplicant_set_suites(wpa_s, NULL, ssid,
 
66
                                          wpa_ie, &wpa_ie_len);
 
67
        } else {
 
68
                wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
 
69
        }
 
70
 
 
71
        if (wpa_s->current_ssid && wpa_s->current_ssid != ssid)
 
72
                eapol_sm_invalidate_cached_session(wpa_s->eapol);
 
73
        wpa_s->current_ssid = ssid;
 
74
        wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
 
75
        wpa_supplicant_initiate_eapol(wpa_s);
 
76
 
 
77
        return 0;
 
78
}
 
79
 
 
80
 
 
81
static void wpa_supplicant_stop_countermeasures(void *eloop_ctx,
 
82
                                                void *sock_ctx)
 
83
{
 
84
        struct wpa_supplicant *wpa_s = eloop_ctx;
 
85
 
 
86
        if (wpa_s->countermeasures) {
 
87
                wpa_s->countermeasures = 0;
 
88
                wpa_drv_set_countermeasures(wpa_s, 0);
 
89
                wpa_msg(wpa_s, MSG_INFO, "WPA: TKIP countermeasures stopped");
 
90
                wpa_supplicant_req_scan(wpa_s, 0, 0);
 
91
        }
 
92
}
 
93
 
 
94
 
 
95
void wpa_supplicant_mark_disassoc(struct wpa_supplicant *wpa_s)
 
96
{
 
97
        wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
 
98
        os_memset(wpa_s->bssid, 0, ETH_ALEN);
 
99
        os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 
100
        eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 
101
        eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 
102
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
 
103
            wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK)
 
104
                eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 
105
        wpa_s->ap_ies_from_associnfo = 0;
 
106
}
 
107
 
 
108
 
 
109
static void wpa_find_assoc_pmkid(struct wpa_supplicant *wpa_s)
 
110
{
 
111
        struct wpa_ie_data ie;
 
112
        int pmksa_set = -1;
 
113
        size_t i;
 
114
 
 
115
        if (wpa_sm_parse_own_wpa_ie(wpa_s->wpa, &ie) < 0 ||
 
116
            ie.pmkid == NULL)
 
117
                return;
 
118
 
 
119
        for (i = 0; i < ie.num_pmkid; i++) {
 
120
                pmksa_set = pmksa_cache_set_current(wpa_s->wpa,
 
121
                                                    ie.pmkid + i * PMKID_LEN,
 
122
                                                    NULL, NULL, 0);
 
123
                if (pmksa_set == 0) {
 
124
                        eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
 
125
                        break;
 
126
                }
 
127
        }
 
128
 
 
129
        wpa_printf(MSG_DEBUG, "RSN: PMKID from assoc IE %sfound from PMKSA "
 
130
                   "cache", pmksa_set == 0 ? "" : "not ");
 
131
}
 
132
 
 
133
 
 
134
static void wpa_supplicant_event_pmkid_candidate(struct wpa_supplicant *wpa_s,
 
135
                                                 union wpa_event_data *data)
 
136
{
 
137
        if (data == NULL) {
 
138
                wpa_printf(MSG_DEBUG, "RSN: No data in PMKID candidate event");
 
139
                return;
 
140
        }
 
141
        wpa_printf(MSG_DEBUG, "RSN: PMKID candidate event - bssid=" MACSTR
 
142
                   " index=%d preauth=%d",
 
143
                   MAC2STR(data->pmkid_candidate.bssid),
 
144
                   data->pmkid_candidate.index,
 
145
                   data->pmkid_candidate.preauth);
 
146
 
 
147
        pmksa_candidate_add(wpa_s->wpa, data->pmkid_candidate.bssid,
 
148
                            data->pmkid_candidate.index,
 
149
                            data->pmkid_candidate.preauth);
 
150
}
 
151
 
 
152
 
 
153
static int wpa_supplicant_dynamic_keys(struct wpa_supplicant *wpa_s)
 
154
{
 
155
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 
156
            wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE)
 
157
                return 0;
 
158
 
 
159
#ifdef IEEE8021X_EAPOL
 
160
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
 
161
            wpa_s->current_ssid &&
 
162
            !(wpa_s->current_ssid->eapol_flags &
 
163
              (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 
164
               EAPOL_FLAG_REQUIRE_KEY_BROADCAST))) {
 
165
                /* IEEE 802.1X, but not using dynamic WEP keys (i.e., either
 
166
                 * plaintext or static WEP keys). */
 
167
                return 0;
 
168
        }
 
169
#endif /* IEEE8021X_EAPOL */
 
170
 
 
171
        return 1;
 
172
}
 
173
 
 
174
 
 
175
/**
 
176
 * wpa_supplicant_scard_init - Initialize SIM/USIM access with PC/SC
 
177
 * @wpa_s: pointer to wpa_supplicant data
 
178
 * @ssid: Configuration data for the network
 
179
 * Returns: 0 on success, -1 on failure
 
180
 *
 
181
 * This function is called when starting authentication with a network that is
 
182
 * configured to use PC/SC for SIM/USIM access (EAP-SIM or EAP-AKA).
 
183
 */
 
184
int wpa_supplicant_scard_init(struct wpa_supplicant *wpa_s,
 
185
                              struct wpa_ssid *ssid)
 
186
{
 
187
#ifdef IEEE8021X_EAPOL
 
188
        int aka = 0, sim = 0, type;
 
189
 
 
190
        if (ssid->eap.pcsc == NULL || wpa_s->scard != NULL)
 
191
                return 0;
 
192
 
 
193
        if (ssid->eap.eap_methods == NULL) {
 
194
                sim = 1;
 
195
                aka = 1;
 
196
        } else {
 
197
                struct eap_method_type *eap = ssid->eap.eap_methods;
 
198
                while (eap->vendor != EAP_VENDOR_IETF ||
 
199
                       eap->method != EAP_TYPE_NONE) {
 
200
                        if (eap->vendor == EAP_VENDOR_IETF) {
 
201
                                if (eap->method == EAP_TYPE_SIM)
 
202
                                        sim = 1;
 
203
                                else if (eap->method == EAP_TYPE_AKA)
 
204
                                        aka = 1;
 
205
                        }
 
206
                        eap++;
 
207
                }
 
208
        }
 
209
 
 
210
        if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_SIM) == NULL)
 
211
                sim = 0;
 
212
        if (eap_peer_get_eap_method(EAP_VENDOR_IETF, EAP_TYPE_AKA) == NULL)
 
213
                aka = 0;
 
214
 
 
215
        if (!sim && !aka) {
 
216
                wpa_printf(MSG_DEBUG, "Selected network is configured to use "
 
217
                           "SIM, but neither EAP-SIM nor EAP-AKA are enabled");
 
218
                return 0;
 
219
        }
 
220
 
 
221
        wpa_printf(MSG_DEBUG, "Selected network is configured to use SIM "
 
222
                   "(sim=%d aka=%d) - initialize PCSC", sim, aka);
 
223
        if (sim && aka)
 
224
                type = SCARD_TRY_BOTH;
 
225
        else if (aka)
 
226
                type = SCARD_USIM_ONLY;
 
227
        else
 
228
                type = SCARD_GSM_SIM_ONLY;
 
229
 
 
230
        wpa_s->scard = scard_init(type);
 
231
        if (wpa_s->scard == NULL) {
 
232
                wpa_printf(MSG_WARNING, "Failed to initialize SIM "
 
233
                           "(pcsc-lite)");
 
234
                return -1;
 
235
        }
 
236
        wpa_sm_set_scard_ctx(wpa_s->wpa, wpa_s->scard);
 
237
        eapol_sm_register_scard_ctx(wpa_s->eapol, wpa_s->scard);
 
238
#endif /* IEEE8021X_EAPOL */
 
239
 
 
240
        return 0;
 
241
}
 
242
 
 
243
 
 
244
#ifndef CONFIG_NO_SCAN_PROCESSING
 
245
static int wpa_supplicant_match_privacy(struct wpa_scan_res *bss,
 
246
                                        struct wpa_ssid *ssid)
 
247
{
 
248
        int i, privacy = 0;
 
249
 
 
250
        if (ssid->mixed_cell)
 
251
                return 1;
 
252
 
 
253
        for (i = 0; i < NUM_WEP_KEYS; i++) {
 
254
                if (ssid->wep_key_len[i]) {
 
255
                        privacy = 1;
 
256
                        break;
 
257
                }
 
258
        }
 
259
#ifdef IEEE8021X_EAPOL
 
260
        if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
 
261
            ssid->eapol_flags & (EAPOL_FLAG_REQUIRE_KEY_UNICAST |
 
262
                                 EAPOL_FLAG_REQUIRE_KEY_BROADCAST))
 
263
                privacy = 1;
 
264
#endif /* IEEE8021X_EAPOL */
 
265
 
 
266
        if (bss->caps & IEEE80211_CAP_PRIVACY)
 
267
                return privacy;
 
268
        return !privacy;
 
269
}
 
270
 
 
271
 
 
272
static int wpa_supplicant_ssid_bss_match(struct wpa_ssid *ssid,
 
273
                                         struct wpa_scan_res *bss)
 
274
{
 
275
        struct wpa_ie_data ie;
 
276
        int proto_match = 0;
 
277
        const u8 *rsn_ie, *wpa_ie;
 
278
 
 
279
        rsn_ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 
280
        while ((ssid->proto & WPA_PROTO_RSN) && rsn_ie) {
 
281
                proto_match++;
 
282
 
 
283
                if (wpa_parse_wpa_ie(rsn_ie, 2 + rsn_ie[1], &ie)) {
 
284
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - parse failed");
 
285
                        break;
 
286
                }
 
287
                if (!(ie.proto & ssid->proto)) {
 
288
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - proto "
 
289
                                   "mismatch");
 
290
                        break;
 
291
                }
 
292
 
 
293
                if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 
294
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - PTK cipher "
 
295
                                   "mismatch");
 
296
                        break;
 
297
                }
 
298
 
 
299
                if (!(ie.group_cipher & ssid->group_cipher)) {
 
300
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - GTK cipher "
 
301
                                   "mismatch");
 
302
                        break;
 
303
                }
 
304
 
 
305
                if (!(ie.key_mgmt & ssid->key_mgmt)) {
 
306
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - key mgmt "
 
307
                                   "mismatch");
 
308
                        break;
 
309
                }
 
310
 
 
311
#ifdef CONFIG_IEEE80211W
 
312
                if (!(ie.capabilities & WPA_CAPABILITY_MGMT_FRAME_PROTECTION)
 
313
                    && ssid->ieee80211w == IEEE80211W_REQUIRED) {
 
314
                        wpa_printf(MSG_DEBUG, "   skip RSN IE - no mgmt frame "
 
315
                                   "protection");
 
316
                        break;
 
317
                }
 
318
#endif /* CONFIG_IEEE80211W */
 
319
 
 
320
                wpa_printf(MSG_DEBUG, "   selected based on RSN IE");
 
321
                return 1;
 
322
        }
 
323
 
 
324
        wpa_ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 
325
        while ((ssid->proto & WPA_PROTO_WPA) && wpa_ie) {
 
326
                proto_match++;
 
327
 
 
328
                if (wpa_parse_wpa_ie(wpa_ie, 2 + wpa_ie[1], &ie)) {
 
329
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - parse failed");
 
330
                        break;
 
331
                }
 
332
                if (!(ie.proto & ssid->proto)) {
 
333
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - proto "
 
334
                                   "mismatch");
 
335
                        break;
 
336
                }
 
337
 
 
338
                if (!(ie.pairwise_cipher & ssid->pairwise_cipher)) {
 
339
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - PTK cipher "
 
340
                                   "mismatch");
 
341
                        break;
 
342
                }
 
343
 
 
344
                if (!(ie.group_cipher & ssid->group_cipher)) {
 
345
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - GTK cipher "
 
346
                                   "mismatch");
 
347
                        break;
 
348
                }
 
349
 
 
350
                if (!(ie.key_mgmt & ssid->key_mgmt)) {
 
351
                        wpa_printf(MSG_DEBUG, "   skip WPA IE - key mgmt "
 
352
                                   "mismatch");
 
353
                        break;
 
354
                }
 
355
 
 
356
                wpa_printf(MSG_DEBUG, "   selected based on WPA IE");
 
357
                return 1;
 
358
        }
 
359
 
 
360
        if (proto_match == 0)
 
361
                wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN proto match");
 
362
 
 
363
        return 0;
 
364
}
 
365
 
 
366
 
 
367
static struct wpa_scan_res *
 
368
wpa_supplicant_select_bss(struct wpa_supplicant *wpa_s, struct wpa_ssid *group,
 
369
                          struct wpa_ssid **selected_ssid)
 
370
{
 
371
        struct wpa_ssid *ssid;
 
372
        struct wpa_scan_res *bss, *selected = NULL;
 
373
        size_t i;
 
374
        struct wpa_blacklist *e;
 
375
        const u8 *ie;
 
376
 
 
377
        wpa_printf(MSG_DEBUG, "Selecting BSS from priority group %d",
 
378
                   group->priority);
 
379
 
 
380
        bss = NULL;
 
381
        ssid = NULL;
 
382
        /* First, try to find WPA-enabled AP */
 
383
        wpa_printf(MSG_DEBUG, "Try to find WPA-enabled AP");
 
384
        for (i = 0; i < wpa_s->scan_res->num && !selected; i++) {
 
385
                const u8 *ssid_;
 
386
                u8 wpa_ie_len, rsn_ie_len, ssid_len;
 
387
                bss = wpa_s->scan_res->res[i];
 
388
 
 
389
                ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 
390
                ssid_ = ie ? ie + 2 : (u8 *) "";
 
391
                ssid_len = ie ? ie[1] : 0;
 
392
 
 
393
                ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 
394
                wpa_ie_len = ie ? ie[1] : 0;
 
395
 
 
396
                ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 
397
                rsn_ie_len = ie ? ie[1] : 0;
 
398
 
 
399
                wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 
400
                           "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 
401
                           (int) i, MAC2STR(bss->bssid),
 
402
                           wpa_ssid_txt(ssid_, ssid_len),
 
403
                           wpa_ie_len, rsn_ie_len, bss->caps);
 
404
                e = wpa_blacklist_get(wpa_s, bss->bssid);
 
405
                if (e && e->count > 1) {
 
406
                        wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 
407
                        continue;
 
408
                }
 
409
 
 
410
                if (wpa_ie_len == 0 && rsn_ie_len == 0) {
 
411
                        wpa_printf(MSG_DEBUG, "   skip - no WPA/RSN IE");
 
412
                        continue;
 
413
                }
 
414
 
 
415
                for (ssid = group; ssid; ssid = ssid->pnext) {
 
416
                        if (ssid->disabled) {
 
417
                                wpa_printf(MSG_DEBUG, "   skip - disabled");
 
418
                                continue;
 
419
                        }
 
420
                        if (ssid_len != ssid->ssid_len ||
 
421
                            os_memcmp(ssid_, ssid->ssid, ssid_len) != 0) {
 
422
                                wpa_printf(MSG_DEBUG, "   skip - "
 
423
                                           "SSID mismatch");
 
424
                                continue;
 
425
                        }
 
426
                        if (ssid->bssid_set &&
 
427
                            os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 
428
                        {
 
429
                                wpa_printf(MSG_DEBUG, "   skip - "
 
430
                                           "BSSID mismatch");
 
431
                                continue;
 
432
                        }
 
433
                        if (wpa_supplicant_ssid_bss_match(ssid, bss)) {
 
434
                                selected = bss;
 
435
                                *selected_ssid = ssid;
 
436
                                wpa_printf(MSG_DEBUG, "   selected WPA AP "
 
437
                                           MACSTR " ssid='%s'",
 
438
                                           MAC2STR(bss->bssid),
 
439
                                           wpa_ssid_txt(ssid_, ssid_len));
 
440
                                break;
 
441
                        }
 
442
                }
 
443
        }
 
444
 
 
445
        /* If no WPA-enabled AP found, try to find non-WPA AP, if configuration
 
446
         * allows this. */
 
447
        wpa_printf(MSG_DEBUG, "Try to find non-WPA AP");
 
448
        for (i = 0; i < wpa_s->scan_res->num && !selected; i++) {
 
449
                const u8 *ssid_;
 
450
                u8 wpa_ie_len, rsn_ie_len, ssid_len;
 
451
                bss = wpa_s->scan_res->res[i];
 
452
 
 
453
                ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
 
454
                ssid_ = ie ? ie + 2 : (u8 *) "";
 
455
                ssid_len = ie ? ie[1] : 0;
 
456
 
 
457
                ie = wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
 
458
                wpa_ie_len = ie ? ie[1] : 0;
 
459
 
 
460
                ie = wpa_scan_get_ie(bss, WLAN_EID_RSN);
 
461
                rsn_ie_len = ie ? ie[1] : 0;
 
462
 
 
463
                wpa_printf(MSG_DEBUG, "%d: " MACSTR " ssid='%s' "
 
464
                           "wpa_ie_len=%u rsn_ie_len=%u caps=0x%x",
 
465
                           (int) i, MAC2STR(bss->bssid),
 
466
                           wpa_ssid_txt(ssid_, ssid_len),
 
467
                           wpa_ie_len, rsn_ie_len, bss->caps);
 
468
                e = wpa_blacklist_get(wpa_s, bss->bssid);
 
469
                if (e && e->count > 1) {
 
470
                        wpa_printf(MSG_DEBUG, "   skip - blacklisted");
 
471
                        continue;
 
472
                }
 
473
                for (ssid = group; ssid; ssid = ssid->pnext) {
 
474
                        if (ssid->disabled) {
 
475
                                wpa_printf(MSG_DEBUG, "   skip - disabled");
 
476
                                continue;
 
477
                        }
 
478
                        if (ssid->ssid_len != 0 &&
 
479
                            (ssid_len != ssid->ssid_len ||
 
480
                             os_memcmp(ssid_, ssid->ssid, ssid_len) != 0)) {
 
481
                                wpa_printf(MSG_DEBUG, "   skip - "
 
482
                                           "SSID mismatch");
 
483
                                continue;
 
484
                        }
 
485
 
 
486
                        if (ssid->bssid_set &&
 
487
                            os_memcmp(bss->bssid, ssid->bssid, ETH_ALEN) != 0)
 
488
                        {
 
489
                                wpa_printf(MSG_DEBUG, "   skip - "
 
490
                                           "BSSID mismatch");
 
491
                                continue;
 
492
                        }
 
493
                        
 
494
                        if (!(ssid->key_mgmt & WPA_KEY_MGMT_NONE) &&
 
495
                            !(ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA))
 
496
                        {
 
497
                                wpa_printf(MSG_DEBUG, "   skip - "
 
498
                                           "non-WPA network not allowed");
 
499
                                continue;
 
500
                        }
 
501
 
 
502
                        if ((ssid->key_mgmt & 
 
503
                             (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK)) &&
 
504
                            (wpa_ie_len != 0 || rsn_ie_len != 0)) {
 
505
                                wpa_printf(MSG_DEBUG, "   skip - "
 
506
                                           "WPA network");
 
507
                                continue;
 
508
                        }
 
509
 
 
510
                        if (!wpa_supplicant_match_privacy(bss, ssid)) {
 
511
                                wpa_printf(MSG_DEBUG, "   skip - "
 
512
                                           "privacy mismatch");
 
513
                                continue;
 
514
                        }
 
515
 
 
516
                        if (bss->caps & IEEE80211_CAP_IBSS) {
 
517
                                wpa_printf(MSG_DEBUG, "   skip - "
 
518
                                           "IBSS (adhoc) network");
 
519
                                continue;
 
520
                        }
 
521
 
 
522
                        selected = bss;
 
523
                        *selected_ssid = ssid;
 
524
                        wpa_printf(MSG_DEBUG, "   selected non-WPA AP "
 
525
                                   MACSTR " ssid='%s'",
 
526
                                   MAC2STR(bss->bssid),
 
527
                                   wpa_ssid_txt(ssid_, ssid_len));
 
528
                        break;
 
529
                }
 
530
        }
 
531
 
 
532
        return selected;
 
533
}
 
534
 
 
535
 
 
536
static void wpa_supplicant_event_scan_results(struct wpa_supplicant *wpa_s)
 
537
{
 
538
        int prio, timeout;
 
539
        struct wpa_scan_res *selected = NULL;
 
540
        struct wpa_ssid *ssid = NULL;
 
541
 
 
542
        if (wpa_supplicant_get_scan_results(wpa_s) < 0) {
 
543
                if (wpa_s->conf->ap_scan == 2)
 
544
                        return;
 
545
                wpa_printf(MSG_DEBUG, "Failed to get scan results - try "
 
546
                           "scanning again");
 
547
                timeout = 1;
 
548
                goto req_scan;
 
549
        }
 
550
 
 
551
        wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_SCAN_RESULTS);
 
552
 
 
553
        wpa_supplicant_dbus_notify_scan_results(wpa_s);
 
554
 
 
555
        if (wpa_s->conf->ap_scan == 2 || wpa_s->disconnected)
 
556
                return;
 
557
 
 
558
        while (selected == NULL) {
 
559
                for (prio = 0; prio < wpa_s->conf->num_prio; prio++) {
 
560
                        selected = wpa_supplicant_select_bss(
 
561
                                wpa_s, wpa_s->conf->pssid[prio], &ssid);
 
562
                        if (selected)
 
563
                                break;
 
564
                }
 
565
 
 
566
                if (selected == NULL && wpa_s->blacklist) {
 
567
                        wpa_printf(MSG_DEBUG, "No APs found - clear blacklist "
 
568
                                   "and try again");
 
569
                        wpa_blacklist_clear(wpa_s);
 
570
                } else if (selected == NULL) {
 
571
                        break;
 
572
                }
 
573
        }
 
574
 
 
575
        if (selected) {
 
576
                /* Do not trigger new association unless the BSSID has changed
 
577
                 * or if reassociation is requested. If we are in process of
 
578
                 * associating with the selected BSSID, do not trigger new
 
579
                 * attempt. */
 
580
                if (wpa_s->reassociate ||
 
581
                    (os_memcmp(selected->bssid, wpa_s->bssid, ETH_ALEN) != 0 &&
 
582
                     (wpa_s->wpa_state != WPA_ASSOCIATING ||
 
583
                      os_memcmp(selected->bssid, wpa_s->pending_bssid,
 
584
                                ETH_ALEN) != 0))) {
 
585
                        if (wpa_supplicant_scard_init(wpa_s, ssid)) {
 
586
                                wpa_supplicant_req_scan(wpa_s, 10, 0);
 
587
                                return;
 
588
                        }
 
589
                        wpa_supplicant_associate(wpa_s, selected, ssid);
 
590
                } else {
 
591
                        wpa_printf(MSG_DEBUG, "Already associated with the "
 
592
                                   "selected AP.");
 
593
                }
 
594
                rsn_preauth_scan_results(wpa_s->wpa, wpa_s->scan_res);
 
595
        } else {
 
596
                wpa_printf(MSG_DEBUG, "No suitable AP found.");
 
597
                timeout = 5;
 
598
                goto req_scan;
 
599
        }
 
600
 
 
601
        return;
 
602
 
 
603
req_scan:
 
604
        if (wpa_s->scan_res_tried == 1 && wpa_s->conf->ap_scan == 1) {
 
605
                /*
 
606
                 * Quick recovery if the initial scan results were not
 
607
                 * complete when fetched before the first scan request.
 
608
                 */
 
609
                wpa_s->scan_res_tried++;
 
610
                timeout = 0;
 
611
        }
 
612
        wpa_supplicant_req_scan(wpa_s, timeout, 0);
 
613
}
 
614
#endif /* CONFIG_NO_SCAN_PROCESSING */
 
615
 
 
616
 
 
617
static void wpa_supplicant_event_associnfo(struct wpa_supplicant *wpa_s,
 
618
                                           union wpa_event_data *data)
 
619
{
 
620
        int l, len, found = 0, wpa_found, rsn_found;
 
621
        u8 *p;
 
622
 
 
623
        wpa_printf(MSG_DEBUG, "Association info event");
 
624
        if (data->assoc_info.req_ies)
 
625
                wpa_hexdump(MSG_DEBUG, "req_ies", data->assoc_info.req_ies,
 
626
                            data->assoc_info.req_ies_len);
 
627
        if (data->assoc_info.resp_ies)
 
628
                wpa_hexdump(MSG_DEBUG, "resp_ies", data->assoc_info.resp_ies,
 
629
                            data->assoc_info.resp_ies_len);
 
630
        if (data->assoc_info.beacon_ies)
 
631
                wpa_hexdump(MSG_DEBUG, "beacon_ies",
 
632
                            data->assoc_info.beacon_ies,
 
633
                            data->assoc_info.beacon_ies_len);
 
634
 
 
635
        p = data->assoc_info.req_ies;
 
636
        l = data->assoc_info.req_ies_len;
 
637
 
 
638
        /* Go through the IEs and make a copy of the WPA/RSN IE, if present. */
 
639
        while (p && l >= 2) {
 
640
                len = p[1] + 2;
 
641
                if (len > l) {
 
642
                        wpa_hexdump(MSG_DEBUG, "Truncated IE in assoc_info",
 
643
                                    p, l);
 
644
                        break;
 
645
                }
 
646
                if ((p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 
647
                     (os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0)) ||
 
648
                    (p[0] == WLAN_EID_RSN && p[1] >= 2)) {
 
649
                        if (wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, p, len))
 
650
                                break;
 
651
                        found = 1;
 
652
                        wpa_find_assoc_pmkid(wpa_s);
 
653
                        break;
 
654
                }
 
655
                l -= len;
 
656
                p += len;
 
657
        }
 
658
        if (!found && data->assoc_info.req_ies)
 
659
                wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
 
660
 
 
661
        /* WPA/RSN IE from Beacon/ProbeResp */
 
662
        p = data->assoc_info.beacon_ies;
 
663
        l = data->assoc_info.beacon_ies_len;
 
664
 
 
665
        /* Go through the IEs and make a copy of the WPA/RSN IEs, if present.
 
666
         */
 
667
        wpa_found = rsn_found = 0;
 
668
        while (p && l >= 2) {
 
669
                len = p[1] + 2;
 
670
                if (len > l) {
 
671
                        wpa_hexdump(MSG_DEBUG, "Truncated IE in beacon_ies",
 
672
                                    p, l);
 
673
                        break;
 
674
                }
 
675
                if (!wpa_found &&
 
676
                    p[0] == WLAN_EID_VENDOR_SPECIFIC && p[1] >= 6 &&
 
677
                    os_memcmp(&p[2], "\x00\x50\xF2\x01\x01\x00", 6) == 0) {
 
678
                        wpa_found = 1;
 
679
                        wpa_sm_set_ap_wpa_ie(wpa_s->wpa, p, len);
 
680
                }
 
681
 
 
682
                if (!rsn_found &&
 
683
                    p[0] == WLAN_EID_RSN && p[1] >= 2) {
 
684
                        rsn_found = 1;
 
685
                        wpa_sm_set_ap_rsn_ie(wpa_s->wpa, p, len);
 
686
                }
 
687
 
 
688
                l -= len;
 
689
                p += len;
 
690
        }
 
691
 
 
692
        if (!wpa_found && data->assoc_info.beacon_ies)
 
693
                wpa_sm_set_ap_wpa_ie(wpa_s->wpa, NULL, 0);
 
694
        if (!rsn_found && data->assoc_info.beacon_ies)
 
695
                wpa_sm_set_ap_rsn_ie(wpa_s->wpa, NULL, 0);
 
696
        if (wpa_found || rsn_found)
 
697
                wpa_s->ap_ies_from_associnfo = 1;
 
698
}
 
699
 
 
700
 
 
701
static void wpa_supplicant_event_assoc(struct wpa_supplicant *wpa_s,
 
702
                                       union wpa_event_data *data)
 
703
{
 
704
        u8 bssid[ETH_ALEN];
 
705
        int ft_completed = wpa_ft_is_completed(wpa_s->wpa);
 
706
 
 
707
        if (data)
 
708
                wpa_supplicant_event_associnfo(wpa_s, data);
 
709
 
 
710
        wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATED);
 
711
        if (wpa_s->use_client_mlme)
 
712
                os_memcpy(bssid, wpa_s->bssid, ETH_ALEN);
 
713
        if (wpa_s->use_client_mlme ||
 
714
            (wpa_drv_get_bssid(wpa_s, bssid) >= 0 &&
 
715
             os_memcmp(bssid, wpa_s->bssid, ETH_ALEN) != 0)) {
 
716
                wpa_msg(wpa_s, MSG_DEBUG, "Associated to a new BSS: BSSID="
 
717
                        MACSTR, MAC2STR(bssid));
 
718
                os_memcpy(wpa_s->bssid, bssid, ETH_ALEN);
 
719
                os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
 
720
                if (wpa_supplicant_dynamic_keys(wpa_s) && !ft_completed) {
 
721
                        wpa_clear_keys(wpa_s, bssid);
 
722
                }
 
723
                if (wpa_supplicant_select_config(wpa_s) < 0) {
 
724
                        wpa_supplicant_disassociate(
 
725
                                wpa_s, WLAN_REASON_DEAUTH_LEAVING);
 
726
                        return;
 
727
                }
 
728
        }
 
729
 
 
730
        wpa_msg(wpa_s, MSG_INFO, "Associated with " MACSTR, MAC2STR(bssid));
 
731
        if (wpa_s->current_ssid) {
 
732
                /* When using scanning (ap_scan=1), SIM PC/SC interface can be
 
733
                 * initialized before association, but for other modes,
 
734
                 * initialize PC/SC here, if the current configuration needs
 
735
                 * smartcard or SIM/USIM. */
 
736
                wpa_supplicant_scard_init(wpa_s, wpa_s->current_ssid);
 
737
        }
 
738
        wpa_sm_notify_assoc(wpa_s->wpa, bssid);
 
739
        l2_packet_notify_auth_start(wpa_s->l2);
 
740
 
 
741
        /*
 
742
         * Set portEnabled first to FALSE in order to get EAP state machine out
 
743
         * of the SUCCESS state and eapSuccess cleared. Without this, EAPOL PAE
 
744
         * state machine may transit to AUTHENTICATING state based on obsolete
 
745
         * eapSuccess and then trigger BE_AUTH to SUCCESS and PAE to
 
746
         * AUTHENTICATED without ever giving chance to EAP state machine to
 
747
         * reset the state.
 
748
         */
 
749
        if (!ft_completed) {
 
750
                eapol_sm_notify_portEnabled(wpa_s->eapol, FALSE);
 
751
                eapol_sm_notify_portValid(wpa_s->eapol, FALSE);
 
752
        }
 
753
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
 
754
            wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK || ft_completed)
 
755
                eapol_sm_notify_eap_success(wpa_s->eapol, FALSE);
 
756
        /* 802.1X::portControl = Auto */
 
757
        eapol_sm_notify_portEnabled(wpa_s->eapol, TRUE);
 
758
        wpa_s->eapol_received = 0;
 
759
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_NONE ||
 
760
            wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 
761
                wpa_supplicant_cancel_auth_timeout(wpa_s);
 
762
                wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 
763
        } else if (!ft_completed) {
 
764
                /* Timeout for receiving the first EAPOL packet */
 
765
                wpa_supplicant_req_auth_timeout(wpa_s, 10, 0);
 
766
        }
 
767
        wpa_supplicant_cancel_scan(wpa_s);
 
768
 
 
769
        if (wpa_s->driver_4way_handshake &&
 
770
            (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
 
771
             wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK)) {
 
772
                /*
 
773
                 * We are done; the driver will take care of RSN 4-way
 
774
                 * handshake.
 
775
                 */
 
776
                wpa_supplicant_cancel_auth_timeout(wpa_s);
 
777
                wpa_supplicant_set_state(wpa_s, WPA_COMPLETED);
 
778
                eapol_sm_notify_portValid(wpa_s->eapol, TRUE);
 
779
                eapol_sm_notify_eap_success(wpa_s->eapol, TRUE);
 
780
        }
 
781
}
 
782
 
 
783
 
 
784
static void wpa_supplicant_event_disassoc(struct wpa_supplicant *wpa_s)
 
785
{
 
786
        const u8 *bssid;
 
787
 
 
788
        if (wpa_s->key_mgmt == WPA_KEY_MGMT_WPA_NONE) {
 
789
                /*
 
790
                 * At least Host AP driver and a Prism3 card seemed to be
 
791
                 * generating streams of disconnected events when configuring
 
792
                 * IBSS for WPA-None. Ignore them for now.
 
793
                 */
 
794
                wpa_printf(MSG_DEBUG, "Disconnect event - ignore in "
 
795
                           "IBSS/WPA-None mode");
 
796
                return;
 
797
        }
 
798
 
 
799
        if (wpa_s->wpa_state == WPA_4WAY_HANDSHAKE &&
 
800
            (wpa_s->key_mgmt == WPA_KEY_MGMT_PSK ||
 
801
             wpa_s->key_mgmt == WPA_KEY_MGMT_FT_PSK)) {
 
802
                wpa_msg(wpa_s, MSG_INFO, "WPA: 4-Way Handshake failed - "
 
803
                        "pre-shared key may be incorrect");
 
804
        }
 
805
        if (wpa_s->wpa_state >= WPA_ASSOCIATED)
 
806
                wpa_supplicant_req_scan(wpa_s, 0, 100000);
 
807
        bssid = wpa_s->bssid;
 
808
        if (os_memcmp(bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0)
 
809
                bssid = wpa_s->pending_bssid;
 
810
        wpa_blacklist_add(wpa_s, bssid);
 
811
        wpa_sm_notify_disassoc(wpa_s->wpa);
 
812
        wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_DISCONNECTED "- Disconnect event - "
 
813
                "remove keys");
 
814
        if (wpa_supplicant_dynamic_keys(wpa_s)) {
 
815
                wpa_s->keys_cleared = 0;
 
816
                wpa_clear_keys(wpa_s, wpa_s->bssid);
 
817
        }
 
818
        wpa_supplicant_mark_disassoc(wpa_s);
 
819
}
 
820
 
 
821
 
 
822
static void
 
823
wpa_supplicant_event_michael_mic_failure(struct wpa_supplicant *wpa_s,
 
824
                                         union wpa_event_data *data)
 
825
{
 
826
        int pairwise;
 
827
        struct os_time t;
 
828
 
 
829
        wpa_msg(wpa_s, MSG_WARNING, "Michael MIC failure detected");
 
830
        pairwise = (data && data->michael_mic_failure.unicast);
 
831
        wpa_sm_key_request(wpa_s->wpa, 1, pairwise);
 
832
        os_get_time(&t);
 
833
        if (wpa_s->last_michael_mic_error &&
 
834
            t.sec - wpa_s->last_michael_mic_error <= 60) {
 
835
                /* initialize countermeasures */
 
836
                wpa_s->countermeasures = 1;
 
837
                wpa_msg(wpa_s, MSG_WARNING, "TKIP countermeasures started");
 
838
 
 
839
                /*
 
840
                 * Need to wait for completion of request frame. We do not get
 
841
                 * any callback for the message completion, so just wait a
 
842
                 * short while and hope for the best. */
 
843
                os_sleep(0, 10000);
 
844
 
 
845
                wpa_drv_set_countermeasures(wpa_s, 1);
 
846
                wpa_supplicant_deauthenticate(wpa_s,
 
847
                                              WLAN_REASON_MICHAEL_MIC_FAILURE);
 
848
                eloop_cancel_timeout(wpa_supplicant_stop_countermeasures,
 
849
                                     wpa_s, NULL);
 
850
                eloop_register_timeout(60, 0,
 
851
                                       wpa_supplicant_stop_countermeasures,
 
852
                                       wpa_s, NULL);
 
853
                /* TODO: mark the AP rejected for 60 second. STA is
 
854
                 * allowed to associate with another AP.. */
 
855
        }
 
856
        wpa_s->last_michael_mic_error = t.sec;
 
857
}
 
858
 
 
859
 
 
860
static void
 
861
wpa_supplicant_event_interface_status(struct wpa_supplicant *wpa_s,
 
862
                                      union wpa_event_data *data)
 
863
{
 
864
        if (os_strcmp(wpa_s->ifname, data->interface_status.ifname) != 0)
 
865
                return;
 
866
 
 
867
        switch (data->interface_status.ievent) {
 
868
        case EVENT_INTERFACE_ADDED:
 
869
                if (!wpa_s->interface_removed)
 
870
                        break;
 
871
                wpa_s->interface_removed = 0;
 
872
                wpa_printf(MSG_DEBUG, "Configured interface was added.");
 
873
                if (wpa_supplicant_driver_init(wpa_s) < 0) {
 
874
                        wpa_printf(MSG_INFO, "Failed to initialize the driver "
 
875
                                   "after interface was added.");
 
876
                }
 
877
                break;
 
878
        case EVENT_INTERFACE_REMOVED:
 
879
                wpa_printf(MSG_DEBUG, "Configured interface was removed.");
 
880
                wpa_s->interface_removed = 1;
 
881
                wpa_supplicant_mark_disassoc(wpa_s);
 
882
                l2_packet_deinit(wpa_s->l2);
 
883
                wpa_s->l2 = NULL;
 
884
                break;
 
885
        }
 
886
}
 
887
 
 
888
 
 
889
#ifdef CONFIG_PEERKEY
 
890
static void
 
891
wpa_supplicant_event_stkstart(struct wpa_supplicant *wpa_s,
 
892
                              union wpa_event_data *data)
 
893
{
 
894
        if (data == NULL)
 
895
                return;
 
896
        wpa_sm_stkstart(wpa_s->wpa, data->stkstart.peer);
 
897
}
 
898
#endif /* CONFIG_PEERKEY */
 
899
 
 
900
 
 
901
#ifdef CONFIG_IEEE80211R
 
902
static void
 
903
wpa_supplicant_event_ft_response(struct wpa_supplicant *wpa_s,
 
904
                                 union wpa_event_data *data)
 
905
{
 
906
        if (data == NULL)
 
907
                return;
 
908
 
 
909
        if (wpa_ft_process_response(wpa_s->wpa, data->ft_ies.ies,
 
910
                                    data->ft_ies.ies_len,
 
911
                                    data->ft_ies.ft_action,
 
912
                                    data->ft_ies.target_ap) < 0) {
 
913
                /* TODO: prevent MLME/driver from trying to associate? */
 
914
        }
 
915
}
 
916
#endif /* CONFIG_IEEE80211R */
 
917
 
 
918
 
 
919
void wpa_supplicant_event(void *ctx, wpa_event_type event,
 
920
                          union wpa_event_data *data)
 
921
{
 
922
        struct wpa_supplicant *wpa_s = ctx;
 
923
 
 
924
        switch (event) {
 
925
        case EVENT_ASSOC:
 
926
                wpa_supplicant_event_assoc(wpa_s, data);
 
927
                break;
 
928
        case EVENT_DISASSOC:
 
929
                wpa_supplicant_event_disassoc(wpa_s);
 
930
                break;
 
931
        case EVENT_MICHAEL_MIC_FAILURE:
 
932
                wpa_supplicant_event_michael_mic_failure(wpa_s, data);
 
933
                break;
 
934
#ifndef CONFIG_NO_SCAN_PROCESSING
 
935
        case EVENT_SCAN_RESULTS:
 
936
                wpa_supplicant_event_scan_results(wpa_s);
 
937
                break;
 
938
#endif /* CONFIG_NO_SCAN_PROCESSING */
 
939
        case EVENT_ASSOCINFO:
 
940
                wpa_supplicant_event_associnfo(wpa_s, data);
 
941
                break;
 
942
        case EVENT_INTERFACE_STATUS:
 
943
                wpa_supplicant_event_interface_status(wpa_s, data);
 
944
                break;
 
945
        case EVENT_PMKID_CANDIDATE:
 
946
                wpa_supplicant_event_pmkid_candidate(wpa_s, data);
 
947
                break;
 
948
#ifdef CONFIG_PEERKEY
 
949
        case EVENT_STKSTART:
 
950
                wpa_supplicant_event_stkstart(wpa_s, data);
 
951
                break;
 
952
#endif /* CONFIG_PEERKEY */
 
953
#ifdef CONFIG_IEEE80211R
 
954
        case EVENT_FT_RESPONSE:
 
955
                wpa_supplicant_event_ft_response(wpa_s, data);
 
956
                break;
 
957
#endif /* CONFIG_IEEE80211R */
 
958
        default:
 
959
                wpa_printf(MSG_INFO, "Unknown event %d", event);
 
960
                break;
 
961
        }
 
962
}