1 /* Copyright (C) 2006, Red Hat, Inc. */
3 #include <linux/bitops.h>
4 #include <net/ieee80211.h>
5 #include <linux/etherdevice.h>
15 static const u8 bssid_any[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
16 static const u8 bssid_off[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
19 static int assoc_helper_essid(struct lbs_private *priv,
20 struct assoc_request * assoc_req)
23 struct bss_descriptor * bss;
26 lbs_deb_enter(LBS_DEB_ASSOC);
28 /* FIXME: take channel into account when picking SSIDs if a channel
32 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
33 channel = assoc_req->channel;
35 lbs_deb_assoc("SSID '%s' requested\n",
36 escape_essid(assoc_req->ssid, assoc_req->ssid_len));
37 if (assoc_req->mode == IW_MODE_INFRA) {
38 lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
39 assoc_req->ssid_len, 0);
41 bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
42 assoc_req->ssid_len, NULL, IW_MODE_INFRA, channel);
44 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
45 ret = lbs_associate(priv, assoc_req);
47 lbs_deb_assoc("SSID not found; cannot associate\n");
49 } else if (assoc_req->mode == IW_MODE_ADHOC) {
50 /* Scan for the network, do not save previous results. Stale
51 * scan data will cause us to join a non-existant adhoc network
53 lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
54 assoc_req->ssid_len, 1);
56 /* Search for the requested SSID in the scan table */
57 bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
58 assoc_req->ssid_len, NULL, IW_MODE_ADHOC, channel);
60 lbs_deb_assoc("SSID found, will join\n");
61 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
62 lbs_join_adhoc_network(priv, assoc_req);
64 /* else send START command */
65 lbs_deb_assoc("SSID not found, creating adhoc network\n");
66 memcpy(&assoc_req->bss.ssid, &assoc_req->ssid,
68 assoc_req->bss.ssid_len = assoc_req->ssid_len;
69 lbs_start_adhoc_network(priv, assoc_req);
73 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
78 static int assoc_helper_bssid(struct lbs_private *priv,
79 struct assoc_request * assoc_req)
82 struct bss_descriptor * bss;
85 lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID %s",
86 print_mac(mac, assoc_req->bssid));
88 /* Search for index position in list for requested MAC */
89 bss = lbs_find_bssid_in_list(priv, assoc_req->bssid,
92 lbs_deb_assoc("ASSOC: WAP: BSSID %s not found, "
93 "cannot associate.\n", print_mac(mac, assoc_req->bssid));
97 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
98 if (assoc_req->mode == IW_MODE_INFRA) {
99 ret = lbs_associate(priv, assoc_req);
100 lbs_deb_assoc("ASSOC: lbs_associate(bssid) returned %d\n", ret);
101 } else if (assoc_req->mode == IW_MODE_ADHOC) {
102 lbs_join_adhoc_network(priv, assoc_req);
106 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
111 static int assoc_helper_associate(struct lbs_private *priv,
112 struct assoc_request * assoc_req)
114 int ret = 0, done = 0;
116 lbs_deb_enter(LBS_DEB_ASSOC);
118 /* If we're given and 'any' BSSID, try associating based on SSID */
120 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
121 if (compare_ether_addr(bssid_any, assoc_req->bssid)
122 && compare_ether_addr(bssid_off, assoc_req->bssid)) {
123 ret = assoc_helper_bssid(priv, assoc_req);
128 if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
129 ret = assoc_helper_essid(priv, assoc_req);
132 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
137 static int assoc_helper_mode(struct lbs_private *priv,
138 struct assoc_request * assoc_req)
142 lbs_deb_enter(LBS_DEB_ASSOC);
144 if (assoc_req->mode == priv->mode)
147 if (assoc_req->mode == IW_MODE_INFRA) {
148 if (priv->psstate != PS_STATE_FULL_POWER)
149 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
150 priv->psmode = LBS802_11POWERMODECAM;
153 priv->mode = assoc_req->mode;
154 ret = lbs_prepare_and_send_command(priv,
156 0, CMD_OPTION_WAITFORRSP,
157 OID_802_11_INFRASTRUCTURE_MODE,
158 /* Shoot me now */ (void *) (size_t) assoc_req->mode);
161 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
166 static int update_channel(struct lbs_private *priv)
170 /* the channel in f/w could be out of sync, get the current channel */
171 lbs_deb_enter(LBS_DEB_ASSOC);
173 ret = lbs_get_channel(priv);
175 priv->curbssparams.channel = (u8) ret;
177 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
181 void lbs_sync_channel(struct work_struct *work)
183 struct lbs_private *priv = container_of(work, struct lbs_private,
186 lbs_deb_enter(LBS_DEB_ASSOC);
187 if (update_channel(priv) != 0)
188 lbs_pr_info("Channel synchronization failed.");
189 lbs_deb_leave(LBS_DEB_ASSOC);
192 static int assoc_helper_channel(struct lbs_private *priv,
193 struct assoc_request * assoc_req)
197 lbs_deb_enter(LBS_DEB_ASSOC);
199 ret = update_channel(priv);
201 lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
204 if (assoc_req->channel == priv->curbssparams.channel)
207 if (priv->mesh_dev) {
208 /* Disconnect mesh while associating -- otherwise it
209 won't let us change channels */
210 lbs_mesh_config(priv, 0);
213 lbs_deb_assoc("ASSOC: channel: %d -> %d\n",
214 priv->curbssparams.channel, assoc_req->channel);
216 ret = lbs_set_channel(priv, assoc_req->channel);
218 lbs_deb_assoc("ASSOC: channel: error setting channel.\n");
220 /* FIXME: shouldn't need to grab the channel _again_ after setting
221 * it since the firmware is supposed to return the new channel, but
223 ret = update_channel(priv);
225 lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
227 if (assoc_req->channel != priv->curbssparams.channel) {
228 lbs_deb_assoc("ASSOC: channel: failed to update channel to %d\n",
233 if ( assoc_req->secinfo.wep_enabled
234 && (assoc_req->wep_keys[0].len
235 || assoc_req->wep_keys[1].len
236 || assoc_req->wep_keys[2].len
237 || assoc_req->wep_keys[3].len)) {
238 /* Make sure WEP keys are re-sent to firmware */
239 set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags);
242 /* Must restart/rejoin adhoc networks after channel change */
243 set_bit(ASSOC_FLAG_SSID, &assoc_req->flags);
247 lbs_mesh_config(priv, 1);
250 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
255 static int assoc_helper_wep_keys(struct lbs_private *priv,
256 struct assoc_request * assoc_req)
261 lbs_deb_enter(LBS_DEB_ASSOC);
263 /* Set or remove WEP keys */
264 if ( assoc_req->wep_keys[0].len
265 || assoc_req->wep_keys[1].len
266 || assoc_req->wep_keys[2].len
267 || assoc_req->wep_keys[3].len) {
268 ret = lbs_prepare_and_send_command(priv,
271 CMD_OPTION_WAITFORRSP,
274 ret = lbs_prepare_and_send_command(priv,
277 CMD_OPTION_WAITFORRSP,
284 /* enable/disable the MAC's WEP packet filter */
285 if (assoc_req->secinfo.wep_enabled)
286 priv->currentpacketfilter |= CMD_ACT_MAC_WEP_ENABLE;
288 priv->currentpacketfilter &= ~CMD_ACT_MAC_WEP_ENABLE;
289 ret = lbs_set_mac_packet_filter(priv);
293 mutex_lock(&priv->lock);
295 /* Copy WEP keys into priv wep key fields */
296 for (i = 0; i < 4; i++) {
297 memcpy(&priv->wep_keys[i], &assoc_req->wep_keys[i],
298 sizeof(struct enc_key));
300 priv->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
302 mutex_unlock(&priv->lock);
305 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
309 static int assoc_helper_secinfo(struct lbs_private *priv,
310 struct assoc_request * assoc_req)
316 lbs_deb_enter(LBS_DEB_ASSOC);
318 memcpy(&priv->secinfo, &assoc_req->secinfo,
319 sizeof(struct lbs_802_11_security));
321 ret = lbs_set_mac_packet_filter(priv);
325 /* If RSN is already enabled, don't try to enable it again, since
326 * ENABLE_RSN resets internal state machines and will clobber the
327 * 4-way WPA handshake.
330 /* Get RSN enabled/disabled */
331 ret = lbs_prepare_and_send_command(priv,
332 CMD_802_11_ENABLE_RSN,
334 CMD_OPTION_WAITFORRSP,
337 lbs_deb_assoc("Failed to get RSN status: %d\n", ret);
341 /* Don't re-enable RSN if it's already enabled */
342 do_wpa = (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled);
346 /* Set RSN enabled/disabled */
348 ret = lbs_prepare_and_send_command(priv,
349 CMD_802_11_ENABLE_RSN,
351 CMD_OPTION_WAITFORRSP,
355 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
360 static int assoc_helper_wpa_keys(struct lbs_private *priv,
361 struct assoc_request * assoc_req)
364 unsigned int flags = assoc_req->flags;
366 lbs_deb_enter(LBS_DEB_ASSOC);
368 /* Work around older firmware bug where WPA unicast and multicast
369 * keys must be set independently. Seen in SDIO parts with firmware
373 if (test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
374 clear_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags);
375 ret = lbs_prepare_and_send_command(priv,
376 CMD_802_11_KEY_MATERIAL,
378 CMD_OPTION_WAITFORRSP,
380 assoc_req->flags = flags;
386 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
387 clear_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags);
389 ret = lbs_prepare_and_send_command(priv,
390 CMD_802_11_KEY_MATERIAL,
392 CMD_OPTION_WAITFORRSP,
394 assoc_req->flags = flags;
398 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
403 static int assoc_helper_wpa_ie(struct lbs_private *priv,
404 struct assoc_request * assoc_req)
408 lbs_deb_enter(LBS_DEB_ASSOC);
410 if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
411 memcpy(&priv->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
412 priv->wpa_ie_len = assoc_req->wpa_ie_len;
414 memset(&priv->wpa_ie, 0, MAX_WPA_IE_LEN);
415 priv->wpa_ie_len = 0;
418 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
423 static int should_deauth_infrastructure(struct lbs_private *priv,
424 struct assoc_request * assoc_req)
428 lbs_deb_enter(LBS_DEB_ASSOC);
430 if (priv->connect_status != LBS_CONNECTED)
433 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
434 lbs_deb_assoc("Deauthenticating due to new SSID\n");
439 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
440 if (priv->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
441 lbs_deb_assoc("Deauthenticating due to new security\n");
447 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
448 lbs_deb_assoc("Deauthenticating due to new BSSID\n");
453 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
454 lbs_deb_assoc("Deauthenticating due to channel switch\n");
459 /* FIXME: deal with 'auto' mode somehow */
460 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
461 if (assoc_req->mode != IW_MODE_INFRA) {
462 lbs_deb_assoc("Deauthenticating due to leaving "
470 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
475 static int should_stop_adhoc(struct lbs_private *priv,
476 struct assoc_request * assoc_req)
478 lbs_deb_enter(LBS_DEB_ASSOC);
480 if (priv->connect_status != LBS_CONNECTED)
483 if (lbs_ssid_cmp(priv->curbssparams.ssid,
484 priv->curbssparams.ssid_len,
485 assoc_req->ssid, assoc_req->ssid_len) != 0)
488 /* FIXME: deal with 'auto' mode somehow */
489 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
490 if (assoc_req->mode != IW_MODE_ADHOC)
494 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
495 if (assoc_req->channel != priv->curbssparams.channel)
499 lbs_deb_leave(LBS_DEB_ASSOC);
504 void lbs_association_worker(struct work_struct *work)
506 struct lbs_private *priv = container_of(work, struct lbs_private,
508 struct assoc_request * assoc_req = NULL;
510 int find_any_ssid = 0;
511 DECLARE_MAC_BUF(mac);
513 lbs_deb_enter(LBS_DEB_ASSOC);
515 mutex_lock(&priv->lock);
516 assoc_req = priv->pending_assoc_req;
517 priv->pending_assoc_req = NULL;
518 priv->in_progress_assoc_req = assoc_req;
519 mutex_unlock(&priv->lock);
525 "Association Request:\n"
535 escape_essid(assoc_req->ssid, assoc_req->ssid_len),
536 assoc_req->channel, assoc_req->band, assoc_req->mode,
537 print_mac(mac, assoc_req->bssid),
538 assoc_req->secinfo.WPAenabled ? " WPA" : "",
539 assoc_req->secinfo.WPA2enabled ? " WPA2" : "",
540 assoc_req->secinfo.wep_enabled ? " WEP" : "",
541 assoc_req->secinfo.auth_mode);
543 /* If 'any' SSID was specified, find an SSID to associate with */
544 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
545 && !assoc_req->ssid_len)
548 /* But don't use 'any' SSID if there's a valid locked BSSID to use */
549 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
550 if (compare_ether_addr(assoc_req->bssid, bssid_any)
551 && compare_ether_addr(assoc_req->bssid, bssid_off))
558 ret = lbs_find_best_network_ssid(priv, assoc_req->ssid,
559 &assoc_req->ssid_len, assoc_req->mode, &new_mode);
561 lbs_deb_assoc("Could not find best network\n");
566 /* Ensure we switch to the mode of the AP */
567 if (assoc_req->mode == IW_MODE_AUTO) {
568 set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
569 assoc_req->mode = new_mode;
574 * Check if the attributes being changing require deauthentication
575 * from the currently associated infrastructure access point.
577 if (priv->mode == IW_MODE_INFRA) {
578 if (should_deauth_infrastructure(priv, assoc_req)) {
579 ret = lbs_send_deauthentication(priv);
581 lbs_deb_assoc("Deauthentication due to new "
582 "configuration request failed: %d\n",
586 } else if (priv->mode == IW_MODE_ADHOC) {
587 if (should_stop_adhoc(priv, assoc_req)) {
588 ret = lbs_stop_adhoc_network(priv);
590 lbs_deb_assoc("Teardown of AdHoc network due to "
591 "new configuration request failed: %d\n",
598 /* Send the various configuration bits to the firmware */
599 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
600 ret = assoc_helper_mode(priv, assoc_req);
605 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
606 ret = assoc_helper_channel(priv, assoc_req);
611 if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
612 || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
613 ret = assoc_helper_wep_keys(priv, assoc_req);
618 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
619 ret = assoc_helper_secinfo(priv, assoc_req);
624 if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
625 ret = assoc_helper_wpa_ie(priv, assoc_req);
630 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
631 || test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
632 ret = assoc_helper_wpa_keys(priv, assoc_req);
637 /* SSID/BSSID should be the _last_ config option set, because they
638 * trigger the association attempt.
640 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
641 || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
644 ret = assoc_helper_associate(priv, assoc_req);
646 lbs_deb_assoc("ASSOC: association unsuccessful: %d\n",
651 if (priv->connect_status != LBS_CONNECTED) {
652 lbs_deb_assoc("ASSOC: association unsuccessful, "
658 lbs_deb_assoc("ASSOC: associated to '%s', %s\n",
659 escape_essid(priv->curbssparams.ssid,
660 priv->curbssparams.ssid_len),
661 print_mac(mac, priv->curbssparams.bssid));
662 lbs_prepare_and_send_command(priv,
664 0, CMD_OPTION_WAITFORRSP, 0, NULL);
666 lbs_prepare_and_send_command(priv,
668 0, CMD_OPTION_WAITFORRSP, 0, NULL);
676 lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
680 mutex_lock(&priv->lock);
681 priv->in_progress_assoc_req = NULL;
682 mutex_unlock(&priv->lock);
686 lbs_deb_leave(LBS_DEB_ASSOC);
691 * Caller MUST hold any necessary locks
693 struct assoc_request *lbs_get_association_request(struct lbs_private *priv)
695 struct assoc_request * assoc_req;
697 lbs_deb_enter(LBS_DEB_ASSOC);
698 if (!priv->pending_assoc_req) {
699 priv->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
701 if (!priv->pending_assoc_req) {
702 lbs_pr_info("Not enough memory to allocate association"
708 /* Copy current configuration attributes to the association request,
709 * but don't overwrite any that are already set.
711 assoc_req = priv->pending_assoc_req;
712 if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
713 memcpy(&assoc_req->ssid, &priv->curbssparams.ssid,
715 assoc_req->ssid_len = priv->curbssparams.ssid_len;
718 if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
719 assoc_req->channel = priv->curbssparams.channel;
721 if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
722 assoc_req->band = priv->curbssparams.band;
724 if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
725 assoc_req->mode = priv->mode;
727 if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
728 memcpy(&assoc_req->bssid, priv->curbssparams.bssid,
732 if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
734 for (i = 0; i < 4; i++) {
735 memcpy(&assoc_req->wep_keys[i], &priv->wep_keys[i],
736 sizeof(struct enc_key));
740 if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
741 assoc_req->wep_tx_keyidx = priv->wep_tx_keyidx;
743 if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
744 memcpy(&assoc_req->wpa_mcast_key, &priv->wpa_mcast_key,
745 sizeof(struct enc_key));
748 if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
749 memcpy(&assoc_req->wpa_unicast_key, &priv->wpa_unicast_key,
750 sizeof(struct enc_key));
753 if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
754 memcpy(&assoc_req->secinfo, &priv->secinfo,
755 sizeof(struct lbs_802_11_security));
758 if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
759 memcpy(&assoc_req->wpa_ie, &priv->wpa_ie,
761 assoc_req->wpa_ie_len = priv->wpa_ie_len;
764 lbs_deb_leave(LBS_DEB_ASSOC);