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] __attribute__ ((aligned (2))) =
16 { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
17 static const u8 bssid_off[ETH_ALEN] __attribute__ ((aligned (2))) =
18 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
21 static int assoc_helper_essid(struct lbs_private *priv,
22 struct assoc_request * assoc_req)
25 struct bss_descriptor * bss;
28 lbs_deb_enter(LBS_DEB_ASSOC);
30 /* FIXME: take channel into account when picking SSIDs if a channel
34 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
35 channel = assoc_req->channel;
37 lbs_deb_assoc("SSID '%s' requested\n",
38 escape_essid(assoc_req->ssid, assoc_req->ssid_len));
39 if (assoc_req->mode == IW_MODE_INFRA) {
40 lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
43 bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
44 assoc_req->ssid_len, NULL, IW_MODE_INFRA, channel);
46 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
47 ret = lbs_associate(priv, assoc_req);
49 lbs_deb_assoc("SSID not found; cannot associate\n");
51 } else if (assoc_req->mode == IW_MODE_ADHOC) {
52 /* Scan for the network, do not save previous results. Stale
53 * scan data will cause us to join a non-existant adhoc network
55 lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
58 /* Search for the requested SSID in the scan table */
59 bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
60 assoc_req->ssid_len, NULL, IW_MODE_ADHOC, channel);
62 lbs_deb_assoc("SSID found, will join\n");
63 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
64 lbs_join_adhoc_network(priv, assoc_req);
66 /* else send START command */
67 lbs_deb_assoc("SSID not found, creating adhoc network\n");
68 memcpy(&assoc_req->bss.ssid, &assoc_req->ssid,
70 assoc_req->bss.ssid_len = assoc_req->ssid_len;
71 lbs_start_adhoc_network(priv, assoc_req);
75 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
80 static int assoc_helper_bssid(struct lbs_private *priv,
81 struct assoc_request * assoc_req)
84 struct bss_descriptor * bss;
87 lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID %s",
88 print_mac(mac, assoc_req->bssid));
90 /* Search for index position in list for requested MAC */
91 bss = lbs_find_bssid_in_list(priv, assoc_req->bssid,
94 lbs_deb_assoc("ASSOC: WAP: BSSID %s not found, "
95 "cannot associate.\n", print_mac(mac, assoc_req->bssid));
99 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
100 if (assoc_req->mode == IW_MODE_INFRA) {
101 ret = lbs_associate(priv, assoc_req);
102 lbs_deb_assoc("ASSOC: lbs_associate(bssid) returned %d\n", ret);
103 } else if (assoc_req->mode == IW_MODE_ADHOC) {
104 lbs_join_adhoc_network(priv, assoc_req);
108 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
113 static int assoc_helper_associate(struct lbs_private *priv,
114 struct assoc_request * assoc_req)
116 int ret = 0, done = 0;
118 lbs_deb_enter(LBS_DEB_ASSOC);
120 /* If we're given and 'any' BSSID, try associating based on SSID */
122 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
123 if (compare_ether_addr(bssid_any, assoc_req->bssid)
124 && compare_ether_addr(bssid_off, assoc_req->bssid)) {
125 ret = assoc_helper_bssid(priv, assoc_req);
130 if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
131 ret = assoc_helper_essid(priv, assoc_req);
134 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
139 static int assoc_helper_mode(struct lbs_private *priv,
140 struct assoc_request * assoc_req)
144 lbs_deb_enter(LBS_DEB_ASSOC);
146 if (assoc_req->mode == priv->mode)
149 if (assoc_req->mode == IW_MODE_INFRA) {
150 if (priv->psstate != PS_STATE_FULL_POWER)
151 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
152 priv->psmode = LBS802_11POWERMODECAM;
155 priv->mode = assoc_req->mode;
156 ret = lbs_prepare_and_send_command(priv,
158 0, CMD_OPTION_WAITFORRSP,
159 OID_802_11_INFRASTRUCTURE_MODE,
160 /* Shoot me now */ (void *) (size_t) assoc_req->mode);
163 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
168 int lbs_update_channel(struct lbs_private *priv)
172 /* the channel in f/w could be out of sync; get the current channel */
173 lbs_deb_enter(LBS_DEB_ASSOC);
175 ret = lbs_get_channel(priv);
177 priv->curbssparams.channel = ret;
180 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
184 static int assoc_helper_channel(struct lbs_private *priv,
185 struct assoc_request * assoc_req)
189 lbs_deb_enter(LBS_DEB_ASSOC);
191 ret = lbs_update_channel(priv);
193 lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
197 if (assoc_req->channel == priv->curbssparams.channel)
200 if (priv->mesh_dev) {
201 /* Change mesh channel first; 21.p21 firmware won't let
202 you change channel otherwise (even though it'll return
204 lbs_mesh_config(priv, 0, assoc_req->channel);
207 lbs_deb_assoc("ASSOC: channel: %d -> %d\n",
208 priv->curbssparams.channel, assoc_req->channel);
210 ret = lbs_set_channel(priv, assoc_req->channel);
212 lbs_deb_assoc("ASSOC: channel: error setting channel.\n");
214 /* FIXME: shouldn't need to grab the channel _again_ after setting
215 * it since the firmware is supposed to return the new channel, but
217 ret = lbs_update_channel(priv);
219 lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
223 if (assoc_req->channel != priv->curbssparams.channel) {
224 lbs_deb_assoc("ASSOC: channel: failed to update channel to %d\n",
229 if ( assoc_req->secinfo.wep_enabled
230 && (assoc_req->wep_keys[0].len
231 || assoc_req->wep_keys[1].len
232 || assoc_req->wep_keys[2].len
233 || assoc_req->wep_keys[3].len)) {
234 /* Make sure WEP keys are re-sent to firmware */
235 set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags);
238 /* Must restart/rejoin adhoc networks after channel change */
239 set_bit(ASSOC_FLAG_SSID, &assoc_req->flags);
243 lbs_mesh_config(priv, 1, priv->curbssparams.channel);
246 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
251 static int assoc_helper_wep_keys(struct lbs_private *priv,
252 struct assoc_request *assoc_req)
257 lbs_deb_enter(LBS_DEB_ASSOC);
259 /* Set or remove WEP keys */
260 if (assoc_req->wep_keys[0].len || assoc_req->wep_keys[1].len ||
261 assoc_req->wep_keys[2].len || assoc_req->wep_keys[3].len)
262 ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_ADD, assoc_req);
264 ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_REMOVE, assoc_req);
269 /* enable/disable the MAC's WEP packet filter */
270 if (assoc_req->secinfo.wep_enabled)
271 priv->currentpacketfilter |= CMD_ACT_MAC_WEP_ENABLE;
273 priv->currentpacketfilter &= ~CMD_ACT_MAC_WEP_ENABLE;
275 ret = lbs_set_mac_packet_filter(priv);
279 mutex_lock(&priv->lock);
281 /* Copy WEP keys into priv wep key fields */
282 for (i = 0; i < 4; i++) {
283 memcpy(&priv->wep_keys[i], &assoc_req->wep_keys[i],
284 sizeof(struct enc_key));
286 priv->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
288 mutex_unlock(&priv->lock);
291 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
295 static int assoc_helper_secinfo(struct lbs_private *priv,
296 struct assoc_request * assoc_req)
302 lbs_deb_enter(LBS_DEB_ASSOC);
304 memcpy(&priv->secinfo, &assoc_req->secinfo,
305 sizeof(struct lbs_802_11_security));
307 ret = lbs_set_mac_packet_filter(priv);
311 /* If RSN is already enabled, don't try to enable it again, since
312 * ENABLE_RSN resets internal state machines and will clobber the
313 * 4-way WPA handshake.
316 /* Get RSN enabled/disabled */
317 ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_GET, &rsn);
319 lbs_deb_assoc("Failed to get RSN status: %d\n", ret);
323 /* Don't re-enable RSN if it's already enabled */
324 do_wpa = assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled;
328 /* Set RSN enabled/disabled */
329 ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_SET, &do_wpa);
332 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
337 static int assoc_helper_wpa_keys(struct lbs_private *priv,
338 struct assoc_request * assoc_req)
341 unsigned int flags = assoc_req->flags;
343 lbs_deb_enter(LBS_DEB_ASSOC);
345 /* Work around older firmware bug where WPA unicast and multicast
346 * keys must be set independently. Seen in SDIO parts with firmware
350 if (test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
351 clear_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags);
352 ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req);
353 assoc_req->flags = flags;
359 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
360 clear_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags);
362 ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req);
363 assoc_req->flags = flags;
367 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
372 static int assoc_helper_wpa_ie(struct lbs_private *priv,
373 struct assoc_request * assoc_req)
377 lbs_deb_enter(LBS_DEB_ASSOC);
379 if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
380 memcpy(&priv->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
381 priv->wpa_ie_len = assoc_req->wpa_ie_len;
383 memset(&priv->wpa_ie, 0, MAX_WPA_IE_LEN);
384 priv->wpa_ie_len = 0;
387 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
392 static int should_deauth_infrastructure(struct lbs_private *priv,
393 struct assoc_request * assoc_req)
397 if (priv->connect_status != LBS_CONNECTED)
400 lbs_deb_enter(LBS_DEB_ASSOC);
401 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
402 lbs_deb_assoc("Deauthenticating due to new SSID\n");
407 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
408 if (priv->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
409 lbs_deb_assoc("Deauthenticating due to new security\n");
415 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
416 lbs_deb_assoc("Deauthenticating due to new BSSID\n");
421 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
422 lbs_deb_assoc("Deauthenticating due to channel switch\n");
427 /* FIXME: deal with 'auto' mode somehow */
428 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
429 if (assoc_req->mode != IW_MODE_INFRA) {
430 lbs_deb_assoc("Deauthenticating due to leaving "
438 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
443 static int should_stop_adhoc(struct lbs_private *priv,
444 struct assoc_request * assoc_req)
446 lbs_deb_enter(LBS_DEB_ASSOC);
448 if (priv->connect_status != LBS_CONNECTED)
451 if (lbs_ssid_cmp(priv->curbssparams.ssid,
452 priv->curbssparams.ssid_len,
453 assoc_req->ssid, assoc_req->ssid_len) != 0)
456 /* FIXME: deal with 'auto' mode somehow */
457 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
458 if (assoc_req->mode != IW_MODE_ADHOC)
462 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
463 if (assoc_req->channel != priv->curbssparams.channel)
467 lbs_deb_leave(LBS_DEB_ASSOC);
472 void lbs_association_worker(struct work_struct *work)
474 struct lbs_private *priv = container_of(work, struct lbs_private,
476 struct assoc_request * assoc_req = NULL;
478 int find_any_ssid = 0;
479 DECLARE_MAC_BUF(mac);
481 lbs_deb_enter(LBS_DEB_ASSOC);
483 mutex_lock(&priv->lock);
484 assoc_req = priv->pending_assoc_req;
485 priv->pending_assoc_req = NULL;
486 priv->in_progress_assoc_req = assoc_req;
487 mutex_unlock(&priv->lock);
493 "Association Request:\n"
503 escape_essid(assoc_req->ssid, assoc_req->ssid_len),
504 assoc_req->channel, assoc_req->band, assoc_req->mode,
505 print_mac(mac, assoc_req->bssid),
506 assoc_req->secinfo.WPAenabled ? " WPA" : "",
507 assoc_req->secinfo.WPA2enabled ? " WPA2" : "",
508 assoc_req->secinfo.wep_enabled ? " WEP" : "",
509 assoc_req->secinfo.auth_mode);
511 /* If 'any' SSID was specified, find an SSID to associate with */
512 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
513 && !assoc_req->ssid_len)
516 /* But don't use 'any' SSID if there's a valid locked BSSID to use */
517 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
518 if (compare_ether_addr(assoc_req->bssid, bssid_any)
519 && compare_ether_addr(assoc_req->bssid, bssid_off))
526 ret = lbs_find_best_network_ssid(priv, assoc_req->ssid,
527 &assoc_req->ssid_len, assoc_req->mode, &new_mode);
529 lbs_deb_assoc("Could not find best network\n");
534 /* Ensure we switch to the mode of the AP */
535 if (assoc_req->mode == IW_MODE_AUTO) {
536 set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
537 assoc_req->mode = new_mode;
542 * Check if the attributes being changing require deauthentication
543 * from the currently associated infrastructure access point.
545 if (priv->mode == IW_MODE_INFRA) {
546 if (should_deauth_infrastructure(priv, assoc_req)) {
547 ret = lbs_send_deauthentication(priv);
549 lbs_deb_assoc("Deauthentication due to new "
550 "configuration request failed: %d\n",
554 } else if (priv->mode == IW_MODE_ADHOC) {
555 if (should_stop_adhoc(priv, assoc_req)) {
556 ret = lbs_stop_adhoc_network(priv);
558 lbs_deb_assoc("Teardown of AdHoc network due to "
559 "new configuration request failed: %d\n",
566 /* Send the various configuration bits to the firmware */
567 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
568 ret = assoc_helper_mode(priv, assoc_req);
573 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
574 ret = assoc_helper_channel(priv, assoc_req);
579 if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
580 || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
581 ret = assoc_helper_wep_keys(priv, assoc_req);
586 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
587 ret = assoc_helper_secinfo(priv, assoc_req);
592 if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
593 ret = assoc_helper_wpa_ie(priv, assoc_req);
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);
605 /* SSID/BSSID should be the _last_ config option set, because they
606 * trigger the association attempt.
608 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
609 || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
612 ret = assoc_helper_associate(priv, assoc_req);
614 lbs_deb_assoc("ASSOC: association unsuccessful: %d\n",
619 if (priv->connect_status != LBS_CONNECTED) {
620 lbs_deb_assoc("ASSOC: association unsuccessful, "
626 lbs_deb_assoc("associated to %s\n",
627 print_mac(mac, priv->curbssparams.bssid));
628 lbs_prepare_and_send_command(priv,
630 0, CMD_OPTION_WAITFORRSP, 0, NULL);
632 lbs_prepare_and_send_command(priv,
634 0, CMD_OPTION_WAITFORRSP, 0, NULL);
642 lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
646 mutex_lock(&priv->lock);
647 priv->in_progress_assoc_req = NULL;
648 mutex_unlock(&priv->lock);
652 lbs_deb_leave(LBS_DEB_ASSOC);
657 * Caller MUST hold any necessary locks
659 struct assoc_request *lbs_get_association_request(struct lbs_private *priv)
661 struct assoc_request * assoc_req;
663 lbs_deb_enter(LBS_DEB_ASSOC);
664 if (!priv->pending_assoc_req) {
665 priv->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
667 if (!priv->pending_assoc_req) {
668 lbs_pr_info("Not enough memory to allocate association"
674 /* Copy current configuration attributes to the association request,
675 * but don't overwrite any that are already set.
677 assoc_req = priv->pending_assoc_req;
678 if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
679 memcpy(&assoc_req->ssid, &priv->curbssparams.ssid,
681 assoc_req->ssid_len = priv->curbssparams.ssid_len;
684 if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
685 assoc_req->channel = priv->curbssparams.channel;
687 if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
688 assoc_req->band = priv->curbssparams.band;
690 if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
691 assoc_req->mode = priv->mode;
693 if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
694 memcpy(&assoc_req->bssid, priv->curbssparams.bssid,
698 if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
700 for (i = 0; i < 4; i++) {
701 memcpy(&assoc_req->wep_keys[i], &priv->wep_keys[i],
702 sizeof(struct enc_key));
706 if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
707 assoc_req->wep_tx_keyidx = priv->wep_tx_keyidx;
709 if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
710 memcpy(&assoc_req->wpa_mcast_key, &priv->wpa_mcast_key,
711 sizeof(struct enc_key));
714 if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
715 memcpy(&assoc_req->wpa_unicast_key, &priv->wpa_unicast_key,
716 sizeof(struct enc_key));
719 if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
720 memcpy(&assoc_req->secinfo, &priv->secinfo,
721 sizeof(struct lbs_802_11_security));
724 if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
725 memcpy(&assoc_req->wpa_ie, &priv->wpa_ie,
727 assoc_req->wpa_ie_len = priv->wpa_ie_len;
730 lbs_deb_leave(LBS_DEB_ASSOC);