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;
327 lbs_deb_enter(LBS_DEB_ASSOC);
329 memcpy(&adapter->secinfo, &assoc_req->secinfo,
330 sizeof(struct wlan_802_11_security));
332 ret = libertas_set_mac_packet_filter(priv);
336 /* enable/disable RSN */
337 ret = libertas_prepare_and_send_command(priv,
338 cmd_802_11_enable_rsn,
340 cmd_option_waitforrsp,
344 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
349 static int assoc_helper_wpa_keys(wlan_private *priv,
350 struct assoc_request * assoc_req)
354 lbs_deb_enter(LBS_DEB_ASSOC);
356 ret = libertas_prepare_and_send_command(priv,
357 cmd_802_11_key_material,
359 cmd_option_waitforrsp,
362 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
367 static int assoc_helper_wpa_ie(wlan_private *priv,
368 struct assoc_request * assoc_req)
370 wlan_adapter *adapter = priv->adapter;
373 lbs_deb_enter(LBS_DEB_ASSOC);
375 if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
376 memcpy(&adapter->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
377 adapter->wpa_ie_len = assoc_req->wpa_ie_len;
379 memset(&adapter->wpa_ie, 0, MAX_WPA_IE_LEN);
380 adapter->wpa_ie_len = 0;
383 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
388 static int should_deauth_infrastructure(wlan_adapter *adapter,
389 struct assoc_request * assoc_req)
391 if (adapter->connect_status != libertas_connected)
394 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
395 lbs_deb_assoc("Deauthenticating due to new SSID in "
396 " configuration request.\n");
400 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
401 if (adapter->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
402 lbs_deb_assoc("Deauthenticating due to updated security "
403 "info in configuration request.\n");
408 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
409 lbs_deb_assoc("Deauthenticating due to new BSSID in "
410 " configuration request.\n");
414 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
415 lbs_deb_assoc("Deauthenticating due to channel switch.\n");
419 /* FIXME: deal with 'auto' mode somehow */
420 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
421 if (assoc_req->mode != IW_MODE_INFRA)
429 static int should_stop_adhoc(wlan_adapter *adapter,
430 struct assoc_request * assoc_req)
432 if (adapter->connect_status != libertas_connected)
435 if (libertas_ssid_cmp(adapter->curbssparams.ssid,
436 adapter->curbssparams.ssid_len,
437 assoc_req->ssid, assoc_req->ssid_len) != 0)
440 /* FIXME: deal with 'auto' mode somehow */
441 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
442 if (assoc_req->mode != IW_MODE_ADHOC)
446 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
447 if (assoc_req->channel != adapter->curbssparams.channel)
455 void libertas_association_worker(struct work_struct *work)
457 wlan_private *priv = container_of(work, wlan_private, assoc_work.work);
458 wlan_adapter *adapter = priv->adapter;
459 struct assoc_request * assoc_req = NULL;
461 int find_any_ssid = 0;
463 lbs_deb_enter(LBS_DEB_ASSOC);
465 mutex_lock(&adapter->lock);
466 assoc_req = adapter->pending_assoc_req;
467 adapter->pending_assoc_req = NULL;
468 adapter->in_progress_assoc_req = assoc_req;
469 mutex_unlock(&adapter->lock);
474 print_assoc_req(__func__, assoc_req);
476 /* If 'any' SSID was specified, find an SSID to associate with */
477 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
478 && !assoc_req->ssid_len)
481 /* But don't use 'any' SSID if there's a valid locked BSSID to use */
482 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
483 if (compare_ether_addr(assoc_req->bssid, bssid_any)
484 && compare_ether_addr(assoc_req->bssid, bssid_off))
491 ret = libertas_find_best_network_ssid(priv, assoc_req->ssid,
492 &assoc_req->ssid_len, assoc_req->mode, &new_mode);
494 lbs_deb_assoc("Could not find best network\n");
499 /* Ensure we switch to the mode of the AP */
500 if (assoc_req->mode == IW_MODE_AUTO) {
501 set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
502 assoc_req->mode = new_mode;
507 * Check if the attributes being changing require deauthentication
508 * from the currently associated infrastructure access point.
510 if (adapter->mode == IW_MODE_INFRA) {
511 if (should_deauth_infrastructure(adapter, assoc_req)) {
512 ret = libertas_send_deauthentication(priv);
514 lbs_deb_assoc("Deauthentication due to new "
515 "configuration request failed: %d\n",
519 } else if (adapter->mode == IW_MODE_ADHOC) {
520 if (should_stop_adhoc(adapter, assoc_req)) {
521 ret = libertas_stop_adhoc_network(priv);
523 lbs_deb_assoc("Teardown of AdHoc network due to "
524 "new configuration request failed: %d\n",
531 /* Send the various configuration bits to the firmware */
532 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
533 ret = assoc_helper_mode(priv, assoc_req);
535 lbs_deb_assoc("ASSOC(:%d) mode: ret = %d\n", __LINE__, ret);
540 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
541 ret = assoc_helper_channel(priv, assoc_req);
543 lbs_deb_assoc("ASSOC(:%d) channel: ret = %d\n",
549 if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
550 || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
551 ret = assoc_helper_wep_keys(priv, assoc_req);
553 lbs_deb_assoc("ASSOC(:%d) wep_keys: ret = %d\n", __LINE__, ret);
558 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
559 ret = assoc_helper_secinfo(priv, assoc_req);
561 lbs_deb_assoc("ASSOC(:%d) secinfo: ret = %d\n", __LINE__, ret);
566 if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
567 ret = assoc_helper_wpa_ie(priv, assoc_req);
569 lbs_deb_assoc("ASSOC(:%d) wpa_ie: ret = %d\n", __LINE__, ret);
574 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
575 || test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
576 ret = assoc_helper_wpa_keys(priv, assoc_req);
578 lbs_deb_assoc("ASSOC(:%d) wpa_keys: ret = %d\n", __LINE__, ret);
583 /* SSID/BSSID should be the _last_ config option set, because they
584 * trigger the association attempt.
586 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
587 || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
590 ret = assoc_helper_associate(priv, assoc_req);
592 lbs_deb_assoc("ASSOC: association attempt unsuccessful: %d\n",
597 if (adapter->connect_status != libertas_connected) {
598 lbs_deb_assoc("ASSOC: assoication attempt unsuccessful, "
604 lbs_deb_assoc("ASSOC: association attempt successful. "
605 "Associated to '%s' (" MAC_FMT ")\n",
606 escape_essid(adapter->curbssparams.ssid,
607 adapter->curbssparams.ssid_len),
608 MAC_ARG(adapter->curbssparams.bssid));
609 libertas_prepare_and_send_command(priv,
611 0, cmd_option_waitforrsp, 0, NULL);
613 libertas_prepare_and_send_command(priv,
615 0, cmd_option_waitforrsp, 0, NULL);
623 lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
627 mutex_lock(&adapter->lock);
628 adapter->in_progress_assoc_req = NULL;
629 mutex_unlock(&adapter->lock);
633 lbs_deb_leave(LBS_DEB_ASSOC);
638 * Caller MUST hold any necessary locks
640 struct assoc_request * wlan_get_association_request(wlan_adapter *adapter)
642 struct assoc_request * assoc_req;
644 if (!adapter->pending_assoc_req) {
645 adapter->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
647 if (!adapter->pending_assoc_req) {
648 lbs_pr_info("Not enough memory to allocate association"
654 /* Copy current configuration attributes to the association request,
655 * but don't overwrite any that are already set.
657 assoc_req = adapter->pending_assoc_req;
658 if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
659 memcpy(&assoc_req->ssid, &adapter->curbssparams.ssid,
661 assoc_req->ssid_len = adapter->curbssparams.ssid_len;
664 if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
665 assoc_req->channel = adapter->curbssparams.channel;
667 if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
668 assoc_req->band = adapter->curbssparams.band;
670 if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
671 assoc_req->mode = adapter->mode;
673 if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
674 memcpy(&assoc_req->bssid, adapter->curbssparams.bssid,
678 if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
680 for (i = 0; i < 4; i++) {
681 memcpy(&assoc_req->wep_keys[i], &adapter->wep_keys[i],
682 sizeof(struct WLAN_802_11_KEY));
686 if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
687 assoc_req->wep_tx_keyidx = adapter->wep_tx_keyidx;
689 if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
690 memcpy(&assoc_req->wpa_mcast_key, &adapter->wpa_mcast_key,
691 sizeof(struct WLAN_802_11_KEY));
694 if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
695 memcpy(&assoc_req->wpa_unicast_key, &adapter->wpa_unicast_key,
696 sizeof(struct WLAN_802_11_KEY));
699 if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
700 memcpy(&assoc_req->secinfo, &adapter->secinfo,
701 sizeof(struct wlan_802_11_security));
704 if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
705 memcpy(&assoc_req->wpa_ie, &adapter->wpa_ie,
707 assoc_req->wpa_ie_len = adapter->wpa_ie_len;
710 print_assoc_req(__func__, assoc_req);