1 /* Copyright (C) 2006, Red Hat, Inc. */
3 #include <linux/bitops.h>
4 #include <net/ieee80211.h>
5 #include <linux/etherdevice.h>
14 static const u8 bssid_any[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
15 static const u8 bssid_off[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
17 static void print_assoc_req(const char * extra, struct assoc_request * assoc_req)
20 "#### Association Request: %s\n"
26 " BSSID: " MAC_FMT "\n"
27 " Encryption:%s%s%s\n"
29 extra, assoc_req->flags,
30 escape_essid(assoc_req->ssid, assoc_req->ssid_len),
31 assoc_req->channel, assoc_req->band, assoc_req->mode,
32 MAC_ARG(assoc_req->bssid),
33 assoc_req->secinfo.WPAenabled ? " WPA" : "",
34 assoc_req->secinfo.WPA2enabled ? " WPA2" : "",
35 assoc_req->secinfo.wep_enabled ? " WEP" : "",
36 assoc_req->secinfo.auth_mode);
40 static int assoc_helper_essid(wlan_private *priv,
41 struct assoc_request * assoc_req)
43 wlan_adapter *adapter = priv->adapter;
45 struct bss_descriptor * bss;
48 lbs_deb_enter(LBS_DEB_ASSOC);
50 /* FIXME: take channel into account when picking SSIDs if a channel
54 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
55 channel = assoc_req->channel;
57 lbs_deb_assoc("New SSID requested: '%s'\n",
58 escape_essid(assoc_req->ssid, assoc_req->ssid_len));
59 if (assoc_req->mode == IW_MODE_INFRA) {
60 if (adapter->prescan) {
61 libertas_send_specific_ssid_scan(priv, assoc_req->ssid,
62 assoc_req->ssid_len, 0);
65 bss = libertas_find_ssid_in_list(adapter, assoc_req->ssid,
66 assoc_req->ssid_len, NULL, IW_MODE_INFRA, channel);
68 lbs_deb_assoc("SSID found in scan list, associating\n");
69 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
70 ret = wlan_associate(priv, assoc_req);
72 lbs_deb_assoc("SSID not found; cannot associate\n");
74 } else if (assoc_req->mode == IW_MODE_ADHOC) {
75 /* Scan for the network, do not save previous results. Stale
76 * scan data will cause us to join a non-existant adhoc network
78 libertas_send_specific_ssid_scan(priv, assoc_req->ssid,
79 assoc_req->ssid_len, 1);
81 /* Search for the requested SSID in the scan table */
82 bss = libertas_find_ssid_in_list(adapter, assoc_req->ssid,
83 assoc_req->ssid_len, NULL, IW_MODE_ADHOC, channel);
85 lbs_deb_assoc("SSID found, will join\n");
86 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
87 libertas_join_adhoc_network(priv, assoc_req);
89 /* else send START command */
90 lbs_deb_assoc("SSID not found, creating adhoc network\n");
91 memcpy(&assoc_req->bss.ssid, &assoc_req->ssid,
93 assoc_req->bss.ssid_len = assoc_req->ssid_len;
94 libertas_start_adhoc_network(priv, assoc_req);
98 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
103 static int assoc_helper_bssid(wlan_private *priv,
104 struct assoc_request * assoc_req)
106 wlan_adapter *adapter = priv->adapter;
108 struct bss_descriptor * bss;
110 lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID " MAC_FMT,
111 MAC_ARG(assoc_req->bssid));
113 /* Search for index position in list for requested MAC */
114 bss = libertas_find_bssid_in_list(adapter, assoc_req->bssid,
117 lbs_deb_assoc("ASSOC: WAP: BSSID " MAC_FMT " not found, "
118 "cannot associate.\n", MAC_ARG(assoc_req->bssid));
122 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
123 if (assoc_req->mode == IW_MODE_INFRA) {
124 ret = wlan_associate(priv, assoc_req);
125 lbs_deb_assoc("ASSOC: wlan_associate(bssid) returned %d\n", ret);
126 } else if (assoc_req->mode == IW_MODE_ADHOC) {
127 libertas_join_adhoc_network(priv, assoc_req);
131 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
136 static int assoc_helper_associate(wlan_private *priv,
137 struct assoc_request * assoc_req)
139 int ret = 0, done = 0;
141 /* If we're given and 'any' BSSID, try associating based on SSID */
143 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
144 if (compare_ether_addr(bssid_any, assoc_req->bssid)
145 && compare_ether_addr(bssid_off, assoc_req->bssid)) {
146 ret = assoc_helper_bssid(priv, assoc_req);
149 lbs_deb_assoc("ASSOC: bssid: ret = %d\n", ret);
154 if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
155 ret = assoc_helper_essid(priv, assoc_req);
157 lbs_deb_assoc("ASSOC: bssid: ret = %d\n", ret);
165 static int assoc_helper_mode(wlan_private *priv,
166 struct assoc_request * assoc_req)
168 wlan_adapter *adapter = priv->adapter;
171 lbs_deb_enter(LBS_DEB_ASSOC);
173 if (assoc_req->mode == adapter->mode)
176 if (assoc_req->mode == IW_MODE_INFRA) {
177 if (adapter->psstate != PS_STATE_FULL_POWER)
178 libertas_ps_wakeup(priv, cmd_option_waitforrsp);
179 adapter->psmode = wlan802_11powermodecam;
182 adapter->mode = assoc_req->mode;
183 ret = libertas_prepare_and_send_command(priv,
185 0, cmd_option_waitforrsp,
186 OID_802_11_INFRASTRUCTURE_MODE,
187 /* Shoot me now */ (void *) (size_t) assoc_req->mode);
190 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
195 static int update_channel(wlan_private * priv)
197 /* the channel in f/w could be out of sync, get the current channel */
198 return libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel,
199 cmd_opt_802_11_rf_channel_get,
200 cmd_option_waitforrsp, 0, NULL);
203 void libertas_sync_channel(struct work_struct *work)
205 wlan_private *priv = container_of(work, wlan_private, sync_channel);
207 if (update_channel(priv) != 0)
208 lbs_pr_info("Channel synchronization failed.");
211 static int assoc_helper_channel(wlan_private *priv,
212 struct assoc_request * assoc_req)
214 wlan_adapter *adapter = priv->adapter;
217 lbs_deb_enter(LBS_DEB_ASSOC);
219 ret = update_channel(priv);
221 lbs_deb_assoc("ASSOC: channel: error getting channel.");
224 if (assoc_req->channel == adapter->curbssparams.channel)
227 lbs_deb_assoc("ASSOC: channel: %d -> %d\n",
228 adapter->curbssparams.channel, assoc_req->channel);
230 ret = libertas_prepare_and_send_command(priv, cmd_802_11_rf_channel,
231 cmd_opt_802_11_rf_channel_set,
232 cmd_option_waitforrsp, 0, &assoc_req->channel);
234 lbs_deb_assoc("ASSOC: channel: error setting channel.");
237 ret = update_channel(priv);
239 lbs_deb_assoc("ASSOC: channel: error getting channel.");
242 if (assoc_req->channel != adapter->curbssparams.channel) {
243 lbs_deb_assoc("ASSOC: channel: failed to update channel to %d",
248 if ( assoc_req->secinfo.wep_enabled
249 && (assoc_req->wep_keys[0].len
250 || assoc_req->wep_keys[1].len
251 || assoc_req->wep_keys[2].len
252 || assoc_req->wep_keys[3].len)) {
253 /* Make sure WEP keys are re-sent to firmware */
254 set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags);
257 /* Must restart/rejoin adhoc networks after channel change */
258 set_bit(ASSOC_FLAG_SSID, &assoc_req->flags);
261 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
266 static int assoc_helper_wep_keys(wlan_private *priv,
267 struct assoc_request * assoc_req)
269 wlan_adapter *adapter = priv->adapter;
273 lbs_deb_enter(LBS_DEB_ASSOC);
275 /* Set or remove WEP keys */
276 if ( assoc_req->wep_keys[0].len
277 || assoc_req->wep_keys[1].len
278 || assoc_req->wep_keys[2].len
279 || assoc_req->wep_keys[3].len) {
280 ret = libertas_prepare_and_send_command(priv,
283 cmd_option_waitforrsp,
286 ret = libertas_prepare_and_send_command(priv,
289 cmd_option_waitforrsp,
296 /* enable/disable the MAC's WEP packet filter */
297 if (assoc_req->secinfo.wep_enabled)
298 adapter->currentpacketfilter |= cmd_act_mac_wep_enable;
300 adapter->currentpacketfilter &= ~cmd_act_mac_wep_enable;
301 ret = libertas_set_mac_packet_filter(priv);
305 mutex_lock(&adapter->lock);
307 /* Copy WEP keys into adapter wep key fields */
308 for (i = 0; i < 4; i++) {
309 memcpy(&adapter->wep_keys[i], &assoc_req->wep_keys[i],
310 sizeof(struct WLAN_802_11_KEY));
312 adapter->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
314 mutex_unlock(&adapter->lock);
317 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
321 static int assoc_helper_secinfo(wlan_private *priv,
322 struct assoc_request * assoc_req)
324 wlan_adapter *adapter = priv->adapter;
329 lbs_deb_enter(LBS_DEB_ASSOC);
331 memcpy(&adapter->secinfo, &assoc_req->secinfo,
332 sizeof(struct wlan_802_11_security));
334 ret = libertas_set_mac_packet_filter(priv);
338 /* If RSN is already enabled, don't try to enable it again, since
339 * ENABLE_RSN resets internal state machines and will clobber the
340 * 4-way WPA handshake.
343 /* Get RSN enabled/disabled */
344 ret = libertas_prepare_and_send_command(priv,
345 cmd_802_11_enable_rsn,
347 cmd_option_waitforrsp,
350 lbs_deb_assoc("Failed to get RSN status: %d", ret);
354 /* Don't re-enable RSN if it's already enabled */
355 do_wpa = (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled);
359 /* Set RSN enabled/disabled */
361 ret = libertas_prepare_and_send_command(priv,
362 cmd_802_11_enable_rsn,
364 cmd_option_waitforrsp,
368 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
373 static int assoc_helper_wpa_keys(wlan_private *priv,
374 struct assoc_request * assoc_req)
378 lbs_deb_enter(LBS_DEB_ASSOC);
380 ret = libertas_prepare_and_send_command(priv,
381 cmd_802_11_key_material,
383 cmd_option_waitforrsp,
386 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
391 static int assoc_helper_wpa_ie(wlan_private *priv,
392 struct assoc_request * assoc_req)
394 wlan_adapter *adapter = priv->adapter;
397 lbs_deb_enter(LBS_DEB_ASSOC);
399 if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
400 memcpy(&adapter->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
401 adapter->wpa_ie_len = assoc_req->wpa_ie_len;
403 memset(&adapter->wpa_ie, 0, MAX_WPA_IE_LEN);
404 adapter->wpa_ie_len = 0;
407 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
412 static int should_deauth_infrastructure(wlan_adapter *adapter,
413 struct assoc_request * assoc_req)
415 if (adapter->connect_status != libertas_connected)
418 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
419 lbs_deb_assoc("Deauthenticating due to new SSID in "
420 " configuration request.\n");
424 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
425 if (adapter->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
426 lbs_deb_assoc("Deauthenticating due to updated security "
427 "info in configuration request.\n");
432 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
433 lbs_deb_assoc("Deauthenticating due to new BSSID in "
434 " configuration request.\n");
438 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
439 lbs_deb_assoc("Deauthenticating due to channel switch.\n");
443 /* FIXME: deal with 'auto' mode somehow */
444 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
445 if (assoc_req->mode != IW_MODE_INFRA)
453 static int should_stop_adhoc(wlan_adapter *adapter,
454 struct assoc_request * assoc_req)
456 if (adapter->connect_status != libertas_connected)
459 if (libertas_ssid_cmp(adapter->curbssparams.ssid,
460 adapter->curbssparams.ssid_len,
461 assoc_req->ssid, assoc_req->ssid_len) != 0)
464 /* FIXME: deal with 'auto' mode somehow */
465 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
466 if (assoc_req->mode != IW_MODE_ADHOC)
470 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
471 if (assoc_req->channel != adapter->curbssparams.channel)
479 void libertas_association_worker(struct work_struct *work)
481 wlan_private *priv = container_of(work, wlan_private, assoc_work.work);
482 wlan_adapter *adapter = priv->adapter;
483 struct assoc_request * assoc_req = NULL;
485 int find_any_ssid = 0;
487 lbs_deb_enter(LBS_DEB_ASSOC);
489 mutex_lock(&adapter->lock);
490 assoc_req = adapter->pending_assoc_req;
491 adapter->pending_assoc_req = NULL;
492 adapter->in_progress_assoc_req = assoc_req;
493 mutex_unlock(&adapter->lock);
498 print_assoc_req(__func__, assoc_req);
500 /* If 'any' SSID was specified, find an SSID to associate with */
501 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
502 && !assoc_req->ssid_len)
505 /* But don't use 'any' SSID if there's a valid locked BSSID to use */
506 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
507 if (compare_ether_addr(assoc_req->bssid, bssid_any)
508 && compare_ether_addr(assoc_req->bssid, bssid_off))
515 ret = libertas_find_best_network_ssid(priv, assoc_req->ssid,
516 &assoc_req->ssid_len, assoc_req->mode, &new_mode);
518 lbs_deb_assoc("Could not find best network\n");
523 /* Ensure we switch to the mode of the AP */
524 if (assoc_req->mode == IW_MODE_AUTO) {
525 set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
526 assoc_req->mode = new_mode;
531 * Check if the attributes being changing require deauthentication
532 * from the currently associated infrastructure access point.
534 if (adapter->mode == IW_MODE_INFRA) {
535 if (should_deauth_infrastructure(adapter, assoc_req)) {
536 ret = libertas_send_deauthentication(priv);
538 lbs_deb_assoc("Deauthentication due to new "
539 "configuration request failed: %d\n",
543 } else if (adapter->mode == IW_MODE_ADHOC) {
544 if (should_stop_adhoc(adapter, assoc_req)) {
545 ret = libertas_stop_adhoc_network(priv);
547 lbs_deb_assoc("Teardown of AdHoc network due to "
548 "new configuration request failed: %d\n",
555 /* Send the various configuration bits to the firmware */
556 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
557 ret = assoc_helper_mode(priv, assoc_req);
559 lbs_deb_assoc("ASSOC(:%d) mode: ret = %d\n", __LINE__, ret);
564 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
565 ret = assoc_helper_channel(priv, assoc_req);
567 lbs_deb_assoc("ASSOC(:%d) channel: ret = %d\n",
573 if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
574 || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
575 ret = assoc_helper_wep_keys(priv, assoc_req);
577 lbs_deb_assoc("ASSOC(:%d) wep_keys: ret = %d\n", __LINE__, ret);
582 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
583 ret = assoc_helper_secinfo(priv, assoc_req);
585 lbs_deb_assoc("ASSOC(:%d) secinfo: ret = %d\n", __LINE__, ret);
590 if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
591 ret = assoc_helper_wpa_ie(priv, assoc_req);
593 lbs_deb_assoc("ASSOC(:%d) wpa_ie: ret = %d\n", __LINE__, ret);
598 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
599 || test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
600 ret = assoc_helper_wpa_keys(priv, assoc_req);
602 lbs_deb_assoc("ASSOC(:%d) wpa_keys: ret = %d\n", __LINE__, ret);
607 /* SSID/BSSID should be the _last_ config option set, because they
608 * trigger the association attempt.
610 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
611 || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
614 ret = assoc_helper_associate(priv, assoc_req);
616 lbs_deb_assoc("ASSOC: association attempt unsuccessful: %d\n",
621 if (adapter->connect_status != libertas_connected) {
622 lbs_deb_assoc("ASSOC: assoication attempt unsuccessful, "
628 lbs_deb_assoc("ASSOC: association attempt successful. "
629 "Associated to '%s' (" MAC_FMT ")\n",
630 escape_essid(adapter->curbssparams.ssid,
631 adapter->curbssparams.ssid_len),
632 MAC_ARG(adapter->curbssparams.bssid));
633 libertas_prepare_and_send_command(priv,
635 0, cmd_option_waitforrsp, 0, NULL);
637 libertas_prepare_and_send_command(priv,
639 0, cmd_option_waitforrsp, 0, NULL);
647 lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
651 mutex_lock(&adapter->lock);
652 adapter->in_progress_assoc_req = NULL;
653 mutex_unlock(&adapter->lock);
657 lbs_deb_leave(LBS_DEB_ASSOC);
662 * Caller MUST hold any necessary locks
664 struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
666 struct assoc_request * assoc_req;
668 if (!adapter->pending_assoc_req) {
669 adapter->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
671 if (!adapter->pending_assoc_req) {
672 lbs_pr_info("Not enough memory to allocate association"
678 /* Copy current configuration attributes to the association request,
679 * but don't overwrite any that are already set.
681 assoc_req = adapter->pending_assoc_req;
682 if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
683 memcpy(&assoc_req->ssid, &adapter->curbssparams.ssid,
685 assoc_req->ssid_len = adapter->curbssparams.ssid_len;
688 if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
689 assoc_req->channel = adapter->curbssparams.channel;
691 if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
692 assoc_req->band = adapter->curbssparams.band;
694 if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
695 assoc_req->mode = adapter->mode;
697 if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
698 memcpy(&assoc_req->bssid, adapter->curbssparams.bssid,
702 if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
704 for (i = 0; i < 4; i++) {
705 memcpy(&assoc_req->wep_keys[i], &adapter->wep_keys[i],
706 sizeof(struct WLAN_802_11_KEY));
710 if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
711 assoc_req->wep_tx_keyidx = adapter->wep_tx_keyidx;
713 if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
714 memcpy(&assoc_req->wpa_mcast_key, &adapter->wpa_mcast_key,
715 sizeof(struct WLAN_802_11_KEY));
718 if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
719 memcpy(&assoc_req->wpa_unicast_key, &adapter->wpa_unicast_key,
720 sizeof(struct WLAN_802_11_KEY));
723 if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
724 memcpy(&assoc_req->secinfo, &adapter->secinfo,
725 sizeof(struct wlan_802_11_security));
728 if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
729 memcpy(&assoc_req->wpa_ie, &adapter->wpa_ie,
731 assoc_req->wpa_ie_len = adapter->wpa_ie_len;
734 print_assoc_req(__func__, assoc_req);