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libertas: Set/clear WPA keys before the WEP ones
[deliverable/linux.git] / drivers / net / wireless / libertas / assoc.c
1 /* Copyright (C) 2006, Red Hat, Inc. */
2
3 #include <linux/types.h>
4 #include <linux/etherdevice.h>
5 #include <linux/ieee80211.h>
6 #include <linux/if_arp.h>
7 #include <net/lib80211.h>
8
9 #include "assoc.h"
10 #include "decl.h"
11 #include "host.h"
12 #include "scan.h"
13 #include "cmd.h"
14
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 };
19
20 /* The firmware needs the following bits masked out of the beacon-derived
21 * capability field when associating/joining to a BSS:
22 * 9 (QoS), 11 (APSD), 12 (unused), 14 (unused), 15 (unused)
23 */
24 #define CAPINFO_MASK (~(0xda00))
25
26 /**
27 * 802.11b/g supported bitrates (in 500Kb/s units)
28 */
29 u8 lbs_bg_rates[MAX_RATES] =
30 { 0x02, 0x04, 0x0b, 0x16, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
31 0x00, 0x00 };
32
33
34 /**
35 * @brief This function finds common rates between rates and card rates.
36 *
37 * It will fill common rates in rates as output if found.
38 *
39 * NOTE: Setting the MSB of the basic rates need to be taken
40 * care, either before or after calling this function
41 *
42 * @param priv A pointer to struct lbs_private structure
43 * @param rates the buffer which keeps input and output
44 * @param rates_size the size of rates buffer; new size of buffer on return,
45 * which will be less than or equal to original rates_size
46 *
47 * @return 0 on success, or -1 on error
48 */
49 static int get_common_rates(struct lbs_private *priv,
50 u8 *rates,
51 u16 *rates_size)
52 {
53 int i, j;
54 u8 intersection[MAX_RATES];
55 u16 intersection_size;
56 u16 num_rates = 0;
57
58 intersection_size = min_t(u16, *rates_size, ARRAY_SIZE(intersection));
59
60 /* Allow each rate from 'rates' that is supported by the hardware */
61 for (i = 0; i < ARRAY_SIZE(lbs_bg_rates) && lbs_bg_rates[i]; i++) {
62 for (j = 0; j < intersection_size && rates[j]; j++) {
63 if (rates[j] == lbs_bg_rates[i])
64 intersection[num_rates++] = rates[j];
65 }
66 }
67
68 lbs_deb_hex(LBS_DEB_JOIN, "AP rates ", rates, *rates_size);
69 lbs_deb_hex(LBS_DEB_JOIN, "card rates ", lbs_bg_rates,
70 ARRAY_SIZE(lbs_bg_rates));
71 lbs_deb_hex(LBS_DEB_JOIN, "common rates", intersection, num_rates);
72 lbs_deb_join("TX data rate 0x%02x\n", priv->cur_rate);
73
74 if (!priv->enablehwauto) {
75 for (i = 0; i < num_rates; i++) {
76 if (intersection[i] == priv->cur_rate)
77 goto done;
78 }
79 lbs_pr_alert("Previously set fixed data rate %#x isn't "
80 "compatible with the network.\n", priv->cur_rate);
81 return -1;
82 }
83
84 done:
85 memset(rates, 0, *rates_size);
86 *rates_size = num_rates;
87 memcpy(rates, intersection, num_rates);
88 return 0;
89 }
90
91
92 /**
93 * @brief Sets the MSB on basic rates as the firmware requires
94 *
95 * Scan through an array and set the MSB for basic data rates.
96 *
97 * @param rates buffer of data rates
98 * @param len size of buffer
99 */
100 static void lbs_set_basic_rate_flags(u8 *rates, size_t len)
101 {
102 int i;
103
104 for (i = 0; i < len; i++) {
105 if (rates[i] == 0x02 || rates[i] == 0x04 ||
106 rates[i] == 0x0b || rates[i] == 0x16)
107 rates[i] |= 0x80;
108 }
109 }
110
111
112 static u8 iw_auth_to_ieee_auth(u8 auth)
113 {
114 if (auth == IW_AUTH_ALG_OPEN_SYSTEM)
115 return 0x00;
116 else if (auth == IW_AUTH_ALG_SHARED_KEY)
117 return 0x01;
118 else if (auth == IW_AUTH_ALG_LEAP)
119 return 0x80;
120
121 lbs_deb_join("%s: invalid auth alg 0x%X\n", __func__, auth);
122 return 0;
123 }
124
125 /**
126 * @brief This function prepares the authenticate command. AUTHENTICATE only
127 * sets the authentication suite for future associations, as the firmware
128 * handles authentication internally during the ASSOCIATE command.
129 *
130 * @param priv A pointer to struct lbs_private structure
131 * @param bssid The peer BSSID with which to authenticate
132 * @param auth The authentication mode to use (from wireless.h)
133 *
134 * @return 0 or -1
135 */
136 static int lbs_set_authentication(struct lbs_private *priv, u8 bssid[6], u8 auth)
137 {
138 struct cmd_ds_802_11_authenticate cmd;
139 int ret = -1;
140
141 lbs_deb_enter(LBS_DEB_JOIN);
142
143 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
144 memcpy(cmd.bssid, bssid, ETH_ALEN);
145
146 cmd.authtype = iw_auth_to_ieee_auth(auth);
147
148 lbs_deb_join("AUTH_CMD: BSSID %pM, auth 0x%x\n", bssid, cmd.authtype);
149
150 ret = lbs_cmd_with_response(priv, CMD_802_11_AUTHENTICATE, &cmd);
151
152 lbs_deb_leave_args(LBS_DEB_JOIN, "ret %d", ret);
153 return ret;
154 }
155
156
157 int lbs_cmd_802_11_set_wep(struct lbs_private *priv, uint16_t cmd_action,
158 struct assoc_request *assoc)
159 {
160 struct cmd_ds_802_11_set_wep cmd;
161 int ret = 0;
162
163 lbs_deb_enter(LBS_DEB_CMD);
164
165 memset(&cmd, 0, sizeof(cmd));
166 cmd.hdr.command = cpu_to_le16(CMD_802_11_SET_WEP);
167 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
168
169 cmd.action = cpu_to_le16(cmd_action);
170
171 if (cmd_action == CMD_ACT_ADD) {
172 int i;
173
174 /* default tx key index */
175 cmd.keyindex = cpu_to_le16(assoc->wep_tx_keyidx &
176 CMD_WEP_KEY_INDEX_MASK);
177
178 /* Copy key types and material to host command structure */
179 for (i = 0; i < 4; i++) {
180 struct enc_key *pkey = &assoc->wep_keys[i];
181
182 switch (pkey->len) {
183 case KEY_LEN_WEP_40:
184 cmd.keytype[i] = CMD_TYPE_WEP_40_BIT;
185 memmove(cmd.keymaterial[i], pkey->key, pkey->len);
186 lbs_deb_cmd("SET_WEP: add key %d (40 bit)\n", i);
187 break;
188 case KEY_LEN_WEP_104:
189 cmd.keytype[i] = CMD_TYPE_WEP_104_BIT;
190 memmove(cmd.keymaterial[i], pkey->key, pkey->len);
191 lbs_deb_cmd("SET_WEP: add key %d (104 bit)\n", i);
192 break;
193 case 0:
194 break;
195 default:
196 lbs_deb_cmd("SET_WEP: invalid key %d, length %d\n",
197 i, pkey->len);
198 ret = -1;
199 goto done;
200 break;
201 }
202 }
203 } else if (cmd_action == CMD_ACT_REMOVE) {
204 /* ACT_REMOVE clears _all_ WEP keys */
205
206 /* default tx key index */
207 cmd.keyindex = cpu_to_le16(priv->wep_tx_keyidx &
208 CMD_WEP_KEY_INDEX_MASK);
209 lbs_deb_cmd("SET_WEP: remove key %d\n", priv->wep_tx_keyidx);
210 }
211
212 ret = lbs_cmd_with_response(priv, CMD_802_11_SET_WEP, &cmd);
213 done:
214 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
215 return ret;
216 }
217
218 int lbs_cmd_802_11_enable_rsn(struct lbs_private *priv, uint16_t cmd_action,
219 uint16_t *enable)
220 {
221 struct cmd_ds_802_11_enable_rsn cmd;
222 int ret;
223
224 lbs_deb_enter(LBS_DEB_CMD);
225
226 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
227 cmd.action = cpu_to_le16(cmd_action);
228
229 if (cmd_action == CMD_ACT_GET)
230 cmd.enable = 0;
231 else {
232 if (*enable)
233 cmd.enable = cpu_to_le16(CMD_ENABLE_RSN);
234 else
235 cmd.enable = cpu_to_le16(CMD_DISABLE_RSN);
236 lbs_deb_cmd("ENABLE_RSN: %d\n", *enable);
237 }
238
239 ret = lbs_cmd_with_response(priv, CMD_802_11_ENABLE_RSN, &cmd);
240 if (!ret && cmd_action == CMD_ACT_GET)
241 *enable = le16_to_cpu(cmd.enable);
242
243 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
244 return ret;
245 }
246
247 static void set_one_wpa_key(struct MrvlIEtype_keyParamSet *keyparam,
248 struct enc_key *key)
249 {
250 lbs_deb_enter(LBS_DEB_CMD);
251
252 if (key->flags & KEY_INFO_WPA_ENABLED)
253 keyparam->keyinfo |= cpu_to_le16(KEY_INFO_WPA_ENABLED);
254 if (key->flags & KEY_INFO_WPA_UNICAST)
255 keyparam->keyinfo |= cpu_to_le16(KEY_INFO_WPA_UNICAST);
256 if (key->flags & KEY_INFO_WPA_MCAST)
257 keyparam->keyinfo |= cpu_to_le16(KEY_INFO_WPA_MCAST);
258
259 keyparam->type = cpu_to_le16(TLV_TYPE_KEY_MATERIAL);
260 keyparam->keytypeid = cpu_to_le16(key->type);
261 keyparam->keylen = cpu_to_le16(key->len);
262 memcpy(keyparam->key, key->key, key->len);
263
264 /* Length field doesn't include the {type,length} header */
265 keyparam->length = cpu_to_le16(sizeof(*keyparam) - 4);
266 lbs_deb_leave(LBS_DEB_CMD);
267 }
268
269 int lbs_cmd_802_11_key_material(struct lbs_private *priv, uint16_t cmd_action,
270 struct assoc_request *assoc)
271 {
272 struct cmd_ds_802_11_key_material cmd;
273 int ret = 0;
274 int index = 0;
275
276 lbs_deb_enter(LBS_DEB_CMD);
277
278 cmd.action = cpu_to_le16(cmd_action);
279 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
280
281 if (cmd_action == CMD_ACT_GET) {
282 cmd.hdr.size = cpu_to_le16(sizeof(struct cmd_header) + 2);
283 } else {
284 memset(cmd.keyParamSet, 0, sizeof(cmd.keyParamSet));
285
286 if (test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc->flags)) {
287 set_one_wpa_key(&cmd.keyParamSet[index],
288 &assoc->wpa_unicast_key);
289 index++;
290 }
291
292 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc->flags)) {
293 set_one_wpa_key(&cmd.keyParamSet[index],
294 &assoc->wpa_mcast_key);
295 index++;
296 }
297
298 /* The common header and as many keys as we included */
299 cmd.hdr.size = cpu_to_le16(offsetof(typeof(cmd),
300 keyParamSet[index]));
301 }
302 ret = lbs_cmd_with_response(priv, CMD_802_11_KEY_MATERIAL, &cmd);
303 /* Copy the returned key to driver private data */
304 if (!ret && cmd_action == CMD_ACT_GET) {
305 void *buf_ptr = cmd.keyParamSet;
306 void *resp_end = &(&cmd)[1];
307
308 while (buf_ptr < resp_end) {
309 struct MrvlIEtype_keyParamSet *keyparam = buf_ptr;
310 struct enc_key *key;
311 uint16_t param_set_len = le16_to_cpu(keyparam->length);
312 uint16_t key_len = le16_to_cpu(keyparam->keylen);
313 uint16_t key_flags = le16_to_cpu(keyparam->keyinfo);
314 uint16_t key_type = le16_to_cpu(keyparam->keytypeid);
315 void *end;
316
317 end = (void *)keyparam + sizeof(keyparam->type)
318 + sizeof(keyparam->length) + param_set_len;
319
320 /* Make sure we don't access past the end of the IEs */
321 if (end > resp_end)
322 break;
323
324 if (key_flags & KEY_INFO_WPA_UNICAST)
325 key = &priv->wpa_unicast_key;
326 else if (key_flags & KEY_INFO_WPA_MCAST)
327 key = &priv->wpa_mcast_key;
328 else
329 break;
330
331 /* Copy returned key into driver */
332 memset(key, 0, sizeof(struct enc_key));
333 if (key_len > sizeof(key->key))
334 break;
335 key->type = key_type;
336 key->flags = key_flags;
337 key->len = key_len;
338 memcpy(key->key, keyparam->key, key->len);
339
340 buf_ptr = end + 1;
341 }
342 }
343
344 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
345 return ret;
346 }
347
348 static __le16 lbs_rate_to_fw_bitmap(int rate, int lower_rates_ok)
349 {
350 /* Bit Rate
351 * 15:13 Reserved
352 * 12 54 Mbps
353 * 11 48 Mbps
354 * 10 36 Mbps
355 * 9 24 Mbps
356 * 8 18 Mbps
357 * 7 12 Mbps
358 * 6 9 Mbps
359 * 5 6 Mbps
360 * 4 Reserved
361 * 3 11 Mbps
362 * 2 5.5 Mbps
363 * 1 2 Mbps
364 * 0 1 Mbps
365 **/
366
367 uint16_t ratemask;
368 int i = lbs_data_rate_to_fw_index(rate);
369 if (lower_rates_ok)
370 ratemask = (0x1fef >> (12 - i));
371 else
372 ratemask = (1 << i);
373 return cpu_to_le16(ratemask);
374 }
375
376 int lbs_cmd_802_11_rate_adapt_rateset(struct lbs_private *priv,
377 uint16_t cmd_action)
378 {
379 struct cmd_ds_802_11_rate_adapt_rateset cmd;
380 int ret;
381
382 lbs_deb_enter(LBS_DEB_CMD);
383
384 if (!priv->cur_rate && !priv->enablehwauto)
385 return -EINVAL;
386
387 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
388
389 cmd.action = cpu_to_le16(cmd_action);
390 cmd.enablehwauto = cpu_to_le16(priv->enablehwauto);
391 cmd.bitmap = lbs_rate_to_fw_bitmap(priv->cur_rate, priv->enablehwauto);
392 ret = lbs_cmd_with_response(priv, CMD_802_11_RATE_ADAPT_RATESET, &cmd);
393 if (!ret && cmd_action == CMD_ACT_GET)
394 priv->enablehwauto = le16_to_cpu(cmd.enablehwauto);
395
396 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
397 return ret;
398 }
399
400 /**
401 * @brief Set the data rate
402 *
403 * @param priv A pointer to struct lbs_private structure
404 * @param rate The desired data rate, or 0 to clear a locked rate
405 *
406 * @return 0 on success, error on failure
407 */
408 int lbs_set_data_rate(struct lbs_private *priv, u8 rate)
409 {
410 struct cmd_ds_802_11_data_rate cmd;
411 int ret = 0;
412
413 lbs_deb_enter(LBS_DEB_CMD);
414
415 memset(&cmd, 0, sizeof(cmd));
416 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
417
418 if (rate > 0) {
419 cmd.action = cpu_to_le16(CMD_ACT_SET_TX_FIX_RATE);
420 cmd.rates[0] = lbs_data_rate_to_fw_index(rate);
421 if (cmd.rates[0] == 0) {
422 lbs_deb_cmd("DATA_RATE: invalid requested rate of"
423 " 0x%02X\n", rate);
424 ret = 0;
425 goto out;
426 }
427 lbs_deb_cmd("DATA_RATE: set fixed 0x%02X\n", cmd.rates[0]);
428 } else {
429 cmd.action = cpu_to_le16(CMD_ACT_SET_TX_AUTO);
430 lbs_deb_cmd("DATA_RATE: setting auto\n");
431 }
432
433 ret = lbs_cmd_with_response(priv, CMD_802_11_DATA_RATE, &cmd);
434 if (ret)
435 goto out;
436
437 lbs_deb_hex(LBS_DEB_CMD, "DATA_RATE_RESP", (u8 *) &cmd, sizeof(cmd));
438
439 /* FIXME: get actual rates FW can do if this command actually returns
440 * all data rates supported.
441 */
442 priv->cur_rate = lbs_fw_index_to_data_rate(cmd.rates[0]);
443 lbs_deb_cmd("DATA_RATE: current rate is 0x%02x\n", priv->cur_rate);
444
445 out:
446 lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
447 return ret;
448 }
449
450
451 int lbs_cmd_802_11_rssi(struct lbs_private *priv,
452 struct cmd_ds_command *cmd)
453 {
454
455 lbs_deb_enter(LBS_DEB_CMD);
456 cmd->command = cpu_to_le16(CMD_802_11_RSSI);
457 cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_rssi) +
458 sizeof(struct cmd_header));
459 cmd->params.rssi.N = cpu_to_le16(DEFAULT_BCN_AVG_FACTOR);
460
461 /* reset Beacon SNR/NF/RSSI values */
462 priv->SNR[TYPE_BEACON][TYPE_NOAVG] = 0;
463 priv->SNR[TYPE_BEACON][TYPE_AVG] = 0;
464 priv->NF[TYPE_BEACON][TYPE_NOAVG] = 0;
465 priv->NF[TYPE_BEACON][TYPE_AVG] = 0;
466 priv->RSSI[TYPE_BEACON][TYPE_NOAVG] = 0;
467 priv->RSSI[TYPE_BEACON][TYPE_AVG] = 0;
468
469 lbs_deb_leave(LBS_DEB_CMD);
470 return 0;
471 }
472
473 int lbs_ret_802_11_rssi(struct lbs_private *priv,
474 struct cmd_ds_command *resp)
475 {
476 struct cmd_ds_802_11_rssi_rsp *rssirsp = &resp->params.rssirsp;
477
478 lbs_deb_enter(LBS_DEB_CMD);
479
480 /* store the non average value */
481 priv->SNR[TYPE_BEACON][TYPE_NOAVG] = get_unaligned_le16(&rssirsp->SNR);
482 priv->NF[TYPE_BEACON][TYPE_NOAVG] =
483 get_unaligned_le16(&rssirsp->noisefloor);
484
485 priv->SNR[TYPE_BEACON][TYPE_AVG] = get_unaligned_le16(&rssirsp->avgSNR);
486 priv->NF[TYPE_BEACON][TYPE_AVG] =
487 get_unaligned_le16(&rssirsp->avgnoisefloor);
488
489 priv->RSSI[TYPE_BEACON][TYPE_NOAVG] =
490 CAL_RSSI(priv->SNR[TYPE_BEACON][TYPE_NOAVG],
491 priv->NF[TYPE_BEACON][TYPE_NOAVG]);
492
493 priv->RSSI[TYPE_BEACON][TYPE_AVG] =
494 CAL_RSSI(priv->SNR[TYPE_BEACON][TYPE_AVG] / AVG_SCALE,
495 priv->NF[TYPE_BEACON][TYPE_AVG] / AVG_SCALE);
496
497 lbs_deb_cmd("RSSI: beacon %d, avg %d\n",
498 priv->RSSI[TYPE_BEACON][TYPE_NOAVG],
499 priv->RSSI[TYPE_BEACON][TYPE_AVG]);
500
501 lbs_deb_leave(LBS_DEB_CMD);
502 return 0;
503 }
504
505
506 int lbs_cmd_bcn_ctrl(struct lbs_private *priv,
507 struct cmd_ds_command *cmd,
508 u16 cmd_action)
509 {
510 struct cmd_ds_802_11_beacon_control
511 *bcn_ctrl = &cmd->params.bcn_ctrl;
512
513 lbs_deb_enter(LBS_DEB_CMD);
514 cmd->size =
515 cpu_to_le16(sizeof(struct cmd_ds_802_11_beacon_control)
516 + sizeof(struct cmd_header));
517 cmd->command = cpu_to_le16(CMD_802_11_BEACON_CTRL);
518
519 bcn_ctrl->action = cpu_to_le16(cmd_action);
520 bcn_ctrl->beacon_enable = cpu_to_le16(priv->beacon_enable);
521 bcn_ctrl->beacon_period = cpu_to_le16(priv->beacon_period);
522
523 lbs_deb_leave(LBS_DEB_CMD);
524 return 0;
525 }
526
527 int lbs_ret_802_11_bcn_ctrl(struct lbs_private *priv,
528 struct cmd_ds_command *resp)
529 {
530 struct cmd_ds_802_11_beacon_control *bcn_ctrl =
531 &resp->params.bcn_ctrl;
532
533 lbs_deb_enter(LBS_DEB_CMD);
534
535 if (bcn_ctrl->action == CMD_ACT_GET) {
536 priv->beacon_enable = (u8) le16_to_cpu(bcn_ctrl->beacon_enable);
537 priv->beacon_period = le16_to_cpu(bcn_ctrl->beacon_period);
538 }
539
540 lbs_deb_enter(LBS_DEB_CMD);
541 return 0;
542 }
543
544
545
546 static int lbs_assoc_post(struct lbs_private *priv,
547 struct cmd_ds_802_11_associate_response *resp)
548 {
549 int ret = 0;
550 union iwreq_data wrqu;
551 struct bss_descriptor *bss;
552 u16 status_code;
553
554 lbs_deb_enter(LBS_DEB_ASSOC);
555
556 if (!priv->in_progress_assoc_req) {
557 lbs_deb_assoc("ASSOC_RESP: no in-progress assoc request\n");
558 ret = -1;
559 goto done;
560 }
561 bss = &priv->in_progress_assoc_req->bss;
562
563 /*
564 * Older FW versions map the IEEE 802.11 Status Code in the association
565 * response to the following values returned in resp->statuscode:
566 *
567 * IEEE Status Code Marvell Status Code
568 * 0 -> 0x0000 ASSOC_RESULT_SUCCESS
569 * 13 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
570 * 14 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
571 * 15 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
572 * 16 -> 0x0004 ASSOC_RESULT_AUTH_REFUSED
573 * others -> 0x0003 ASSOC_RESULT_REFUSED
574 *
575 * Other response codes:
576 * 0x0001 -> ASSOC_RESULT_INVALID_PARAMETERS (unused)
577 * 0x0002 -> ASSOC_RESULT_TIMEOUT (internal timer expired waiting for
578 * association response from the AP)
579 */
580
581 status_code = le16_to_cpu(resp->statuscode);
582 if (priv->fwrelease < 0x09000000) {
583 switch (status_code) {
584 case 0x00:
585 break;
586 case 0x01:
587 lbs_deb_assoc("ASSOC_RESP: invalid parameters\n");
588 break;
589 case 0x02:
590 lbs_deb_assoc("ASSOC_RESP: internal timer "
591 "expired while waiting for the AP\n");
592 break;
593 case 0x03:
594 lbs_deb_assoc("ASSOC_RESP: association "
595 "refused by AP\n");
596 break;
597 case 0x04:
598 lbs_deb_assoc("ASSOC_RESP: authentication "
599 "refused by AP\n");
600 break;
601 default:
602 lbs_deb_assoc("ASSOC_RESP: failure reason 0x%02x "
603 " unknown\n", status_code);
604 break;
605 }
606 } else {
607 /* v9+ returns the AP's association response */
608 lbs_deb_assoc("ASSOC_RESP: failure reason 0x%02x\n", status_code);
609 }
610
611 if (status_code) {
612 lbs_mac_event_disconnected(priv);
613 ret = -1;
614 goto done;
615 }
616
617 lbs_deb_hex(LBS_DEB_ASSOC, "ASSOC_RESP",
618 (void *) (resp + sizeof (resp->hdr)),
619 le16_to_cpu(resp->hdr.size) - sizeof (resp->hdr));
620
621 /* Send a Media Connected event, according to the Spec */
622 priv->connect_status = LBS_CONNECTED;
623
624 /* Update current SSID and BSSID */
625 memcpy(&priv->curbssparams.ssid, &bss->ssid, IEEE80211_MAX_SSID_LEN);
626 priv->curbssparams.ssid_len = bss->ssid_len;
627 memcpy(priv->curbssparams.bssid, bss->bssid, ETH_ALEN);
628
629 priv->SNR[TYPE_RXPD][TYPE_AVG] = 0;
630 priv->NF[TYPE_RXPD][TYPE_AVG] = 0;
631
632 memset(priv->rawSNR, 0x00, sizeof(priv->rawSNR));
633 memset(priv->rawNF, 0x00, sizeof(priv->rawNF));
634 priv->nextSNRNF = 0;
635 priv->numSNRNF = 0;
636
637 netif_carrier_on(priv->dev);
638 if (!priv->tx_pending_len)
639 netif_wake_queue(priv->dev);
640
641 memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid, ETH_ALEN);
642 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
643 wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
644
645 done:
646 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
647 return ret;
648 }
649
650 /**
651 * @brief This function prepares an association-class command.
652 *
653 * @param priv A pointer to struct lbs_private structure
654 * @param assoc_req The association request describing the BSS to associate
655 * or reassociate with
656 * @param command The actual command, either CMD_802_11_ASSOCIATE or
657 * CMD_802_11_REASSOCIATE
658 *
659 * @return 0 or -1
660 */
661 static int lbs_associate(struct lbs_private *priv,
662 struct assoc_request *assoc_req,
663 u16 command)
664 {
665 struct cmd_ds_802_11_associate cmd;
666 int ret = 0;
667 struct bss_descriptor *bss = &assoc_req->bss;
668 u8 *pos = &(cmd.iebuf[0]);
669 u16 tmpcap, tmplen, tmpauth;
670 struct mrvl_ie_ssid_param_set *ssid;
671 struct mrvl_ie_ds_param_set *ds;
672 struct mrvl_ie_cf_param_set *cf;
673 struct mrvl_ie_rates_param_set *rates;
674 struct mrvl_ie_rsn_param_set *rsn;
675 struct mrvl_ie_auth_type *auth;
676
677 lbs_deb_enter(LBS_DEB_ASSOC);
678
679 BUG_ON((command != CMD_802_11_ASSOCIATE) &&
680 (command != CMD_802_11_REASSOCIATE));
681
682 memset(&cmd, 0, sizeof(cmd));
683 cmd.hdr.command = cpu_to_le16(command);
684
685 /* Fill in static fields */
686 memcpy(cmd.bssid, bss->bssid, ETH_ALEN);
687 cmd.listeninterval = cpu_to_le16(MRVDRV_DEFAULT_LISTEN_INTERVAL);
688
689 /* Capability info */
690 tmpcap = (bss->capability & CAPINFO_MASK);
691 if (bss->mode == IW_MODE_INFRA)
692 tmpcap |= WLAN_CAPABILITY_ESS;
693 cmd.capability = cpu_to_le16(tmpcap);
694 lbs_deb_assoc("ASSOC_CMD: capability 0x%04x\n", tmpcap);
695
696 /* SSID */
697 ssid = (struct mrvl_ie_ssid_param_set *) pos;
698 ssid->header.type = cpu_to_le16(TLV_TYPE_SSID);
699 tmplen = bss->ssid_len;
700 ssid->header.len = cpu_to_le16(tmplen);
701 memcpy(ssid->ssid, bss->ssid, tmplen);
702 pos += sizeof(ssid->header) + tmplen;
703
704 ds = (struct mrvl_ie_ds_param_set *) pos;
705 ds->header.type = cpu_to_le16(TLV_TYPE_PHY_DS);
706 ds->header.len = cpu_to_le16(1);
707 ds->channel = bss->phy.ds.channel;
708 pos += sizeof(ds->header) + 1;
709
710 cf = (struct mrvl_ie_cf_param_set *) pos;
711 cf->header.type = cpu_to_le16(TLV_TYPE_CF);
712 tmplen = sizeof(*cf) - sizeof (cf->header);
713 cf->header.len = cpu_to_le16(tmplen);
714 /* IE payload should be zeroed, firmware fills it in for us */
715 pos += sizeof(*cf);
716
717 rates = (struct mrvl_ie_rates_param_set *) pos;
718 rates->header.type = cpu_to_le16(TLV_TYPE_RATES);
719 tmplen = min_t(u16, ARRAY_SIZE(bss->rates), MAX_RATES);
720 memcpy(&rates->rates, &bss->rates, tmplen);
721 if (get_common_rates(priv, rates->rates, &tmplen)) {
722 ret = -1;
723 goto done;
724 }
725 pos += sizeof(rates->header) + tmplen;
726 rates->header.len = cpu_to_le16(tmplen);
727 lbs_deb_assoc("ASSOC_CMD: num rates %u\n", tmplen);
728
729 /* Copy the infra. association rates into Current BSS state structure */
730 memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates));
731 memcpy(&priv->curbssparams.rates, &rates->rates, tmplen);
732
733 /* Set MSB on basic rates as the firmware requires, but _after_
734 * copying to current bss rates.
735 */
736 lbs_set_basic_rate_flags(rates->rates, tmplen);
737
738 /* Firmware v9+ indicate authentication suites as a TLV */
739 if (priv->fwrelease >= 0x09000000) {
740 auth = (struct mrvl_ie_auth_type *) pos;
741 auth->header.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
742 auth->header.len = cpu_to_le16(2);
743 tmpauth = iw_auth_to_ieee_auth(priv->secinfo.auth_mode);
744 auth->auth = cpu_to_le16(tmpauth);
745 pos += sizeof(auth->header) + 2;
746
747 lbs_deb_join("AUTH_CMD: BSSID %pM, auth 0x%x\n",
748 bss->bssid, priv->secinfo.auth_mode);
749 }
750
751 /* WPA/WPA2 IEs */
752 if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
753 rsn = (struct mrvl_ie_rsn_param_set *) pos;
754 /* WPA_IE or WPA2_IE */
755 rsn->header.type = cpu_to_le16((u16) assoc_req->wpa_ie[0]);
756 tmplen = (u16) assoc_req->wpa_ie[1];
757 rsn->header.len = cpu_to_le16(tmplen);
758 memcpy(rsn->rsnie, &assoc_req->wpa_ie[2], tmplen);
759 lbs_deb_hex(LBS_DEB_JOIN, "ASSOC_CMD: WPA/RSN IE", (u8 *) rsn,
760 sizeof(rsn->header) + tmplen);
761 pos += sizeof(rsn->header) + tmplen;
762 }
763
764 cmd.hdr.size = cpu_to_le16((sizeof(cmd) - sizeof(cmd.iebuf)) +
765 (u16)(pos - (u8 *) &cmd.iebuf));
766
767 /* update curbssparams */
768 priv->channel = bss->phy.ds.channel;
769
770 ret = lbs_cmd_with_response(priv, command, &cmd);
771 if (ret == 0) {
772 ret = lbs_assoc_post(priv,
773 (struct cmd_ds_802_11_associate_response *) &cmd);
774 }
775
776 done:
777 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
778 return ret;
779 }
780
781 /**
782 * @brief Associate to a specific BSS discovered in a scan
783 *
784 * @param priv A pointer to struct lbs_private structure
785 * @param assoc_req The association request describing the BSS to associate with
786 *
787 * @return 0-success, otherwise fail
788 */
789 static int lbs_try_associate(struct lbs_private *priv,
790 struct assoc_request *assoc_req)
791 {
792 int ret;
793 u8 preamble = RADIO_PREAMBLE_LONG;
794
795 lbs_deb_enter(LBS_DEB_ASSOC);
796
797 /* FW v9 and higher indicate authentication suites as a TLV in the
798 * association command, not as a separate authentication command.
799 */
800 if (priv->fwrelease < 0x09000000) {
801 ret = lbs_set_authentication(priv, assoc_req->bss.bssid,
802 priv->secinfo.auth_mode);
803 if (ret)
804 goto out;
805 }
806
807 /* Use short preamble only when both the BSS and firmware support it */
808 if (assoc_req->bss.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
809 preamble = RADIO_PREAMBLE_SHORT;
810
811 ret = lbs_set_radio(priv, preamble, 1);
812 if (ret)
813 goto out;
814
815 ret = lbs_associate(priv, assoc_req, CMD_802_11_ASSOCIATE);
816
817 out:
818 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
819 return ret;
820 }
821
822 static int lbs_adhoc_post(struct lbs_private *priv,
823 struct cmd_ds_802_11_ad_hoc_result *resp)
824 {
825 int ret = 0;
826 u16 command = le16_to_cpu(resp->hdr.command);
827 u16 result = le16_to_cpu(resp->hdr.result);
828 union iwreq_data wrqu;
829 struct bss_descriptor *bss;
830 DECLARE_SSID_BUF(ssid);
831
832 lbs_deb_enter(LBS_DEB_JOIN);
833
834 if (!priv->in_progress_assoc_req) {
835 lbs_deb_join("ADHOC_RESP: no in-progress association "
836 "request\n");
837 ret = -1;
838 goto done;
839 }
840 bss = &priv->in_progress_assoc_req->bss;
841
842 /*
843 * Join result code 0 --> SUCCESS
844 */
845 if (result) {
846 lbs_deb_join("ADHOC_RESP: failed (result 0x%X)\n", result);
847 if (priv->connect_status == LBS_CONNECTED)
848 lbs_mac_event_disconnected(priv);
849 ret = -1;
850 goto done;
851 }
852
853 /* Send a Media Connected event, according to the Spec */
854 priv->connect_status = LBS_CONNECTED;
855
856 if (command == CMD_RET(CMD_802_11_AD_HOC_START)) {
857 /* Update the created network descriptor with the new BSSID */
858 memcpy(bss->bssid, resp->bssid, ETH_ALEN);
859 }
860
861 /* Set the BSSID from the joined/started descriptor */
862 memcpy(&priv->curbssparams.bssid, bss->bssid, ETH_ALEN);
863
864 /* Set the new SSID to current SSID */
865 memcpy(&priv->curbssparams.ssid, &bss->ssid, IEEE80211_MAX_SSID_LEN);
866 priv->curbssparams.ssid_len = bss->ssid_len;
867
868 netif_carrier_on(priv->dev);
869 if (!priv->tx_pending_len)
870 netif_wake_queue(priv->dev);
871
872 memset(&wrqu, 0, sizeof(wrqu));
873 memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid, ETH_ALEN);
874 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
875 wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
876
877 lbs_deb_join("ADHOC_RESP: Joined/started '%s', BSSID %pM, channel %d\n",
878 print_ssid(ssid, bss->ssid, bss->ssid_len),
879 priv->curbssparams.bssid,
880 priv->channel);
881
882 done:
883 lbs_deb_leave_args(LBS_DEB_JOIN, "ret %d", ret);
884 return ret;
885 }
886
887 /**
888 * @brief Join an adhoc network found in a previous scan
889 *
890 * @param priv A pointer to struct lbs_private structure
891 * @param assoc_req The association request describing the BSS to join
892 *
893 * @return 0 on success, error on failure
894 */
895 static int lbs_adhoc_join(struct lbs_private *priv,
896 struct assoc_request *assoc_req)
897 {
898 struct cmd_ds_802_11_ad_hoc_join cmd;
899 struct bss_descriptor *bss = &assoc_req->bss;
900 u8 preamble = RADIO_PREAMBLE_LONG;
901 DECLARE_SSID_BUF(ssid);
902 u16 ratesize = 0;
903 int ret = 0;
904
905 lbs_deb_enter(LBS_DEB_ASSOC);
906
907 lbs_deb_join("current SSID '%s', ssid length %u\n",
908 print_ssid(ssid, priv->curbssparams.ssid,
909 priv->curbssparams.ssid_len),
910 priv->curbssparams.ssid_len);
911 lbs_deb_join("requested ssid '%s', ssid length %u\n",
912 print_ssid(ssid, bss->ssid, bss->ssid_len),
913 bss->ssid_len);
914
915 /* check if the requested SSID is already joined */
916 if (priv->curbssparams.ssid_len &&
917 !lbs_ssid_cmp(priv->curbssparams.ssid,
918 priv->curbssparams.ssid_len,
919 bss->ssid, bss->ssid_len) &&
920 (priv->mode == IW_MODE_ADHOC) &&
921 (priv->connect_status == LBS_CONNECTED)) {
922 union iwreq_data wrqu;
923
924 lbs_deb_join("ADHOC_J_CMD: New ad-hoc SSID is the same as "
925 "current, not attempting to re-join");
926
927 /* Send the re-association event though, because the association
928 * request really was successful, even if just a null-op.
929 */
930 memset(&wrqu, 0, sizeof(wrqu));
931 memcpy(wrqu.ap_addr.sa_data, priv->curbssparams.bssid,
932 ETH_ALEN);
933 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
934 wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
935 goto out;
936 }
937
938 /* Use short preamble only when both the BSS and firmware support it */
939 if (bss->capability & WLAN_CAPABILITY_SHORT_PREAMBLE) {
940 lbs_deb_join("AdhocJoin: Short preamble\n");
941 preamble = RADIO_PREAMBLE_SHORT;
942 }
943
944 ret = lbs_set_radio(priv, preamble, 1);
945 if (ret)
946 goto out;
947
948 lbs_deb_join("AdhocJoin: channel = %d\n", assoc_req->channel);
949 lbs_deb_join("AdhocJoin: band = %c\n", assoc_req->band);
950
951 priv->adhoccreate = 0;
952 priv->channel = bss->channel;
953
954 /* Build the join command */
955 memset(&cmd, 0, sizeof(cmd));
956 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
957
958 cmd.bss.type = CMD_BSS_TYPE_IBSS;
959 cmd.bss.beaconperiod = cpu_to_le16(bss->beaconperiod);
960
961 memcpy(&cmd.bss.bssid, &bss->bssid, ETH_ALEN);
962 memcpy(&cmd.bss.ssid, &bss->ssid, bss->ssid_len);
963
964 memcpy(&cmd.bss.ds, &bss->phy.ds, sizeof(struct ieee_ie_ds_param_set));
965
966 memcpy(&cmd.bss.ibss, &bss->ss.ibss,
967 sizeof(struct ieee_ie_ibss_param_set));
968
969 cmd.bss.capability = cpu_to_le16(bss->capability & CAPINFO_MASK);
970 lbs_deb_join("ADHOC_J_CMD: tmpcap=%4X CAPINFO_MASK=%4X\n",
971 bss->capability, CAPINFO_MASK);
972
973 /* information on BSSID descriptor passed to FW */
974 lbs_deb_join("ADHOC_J_CMD: BSSID = %pM, SSID = '%s'\n",
975 cmd.bss.bssid, cmd.bss.ssid);
976
977 /* Only v8 and below support setting these */
978 if (priv->fwrelease < 0x09000000) {
979 /* failtimeout */
980 cmd.failtimeout = cpu_to_le16(MRVDRV_ASSOCIATION_TIME_OUT);
981 /* probedelay */
982 cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
983 }
984
985 /* Copy Data rates from the rates recorded in scan response */
986 memset(cmd.bss.rates, 0, sizeof(cmd.bss.rates));
987 ratesize = min_t(u16, ARRAY_SIZE(cmd.bss.rates), ARRAY_SIZE (bss->rates));
988 memcpy(cmd.bss.rates, bss->rates, ratesize);
989 if (get_common_rates(priv, cmd.bss.rates, &ratesize)) {
990 lbs_deb_join("ADHOC_JOIN: get_common_rates returned error.\n");
991 ret = -1;
992 goto out;
993 }
994
995 /* Copy the ad-hoc creation rates into Current BSS state structure */
996 memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates));
997 memcpy(&priv->curbssparams.rates, cmd.bss.rates, ratesize);
998
999 /* Set MSB on basic rates as the firmware requires, but _after_
1000 * copying to current bss rates.
1001 */
1002 lbs_set_basic_rate_flags(cmd.bss.rates, ratesize);
1003
1004 cmd.bss.ibss.atimwindow = bss->atimwindow;
1005
1006 if (assoc_req->secinfo.wep_enabled) {
1007 u16 tmp = le16_to_cpu(cmd.bss.capability);
1008 tmp |= WLAN_CAPABILITY_PRIVACY;
1009 cmd.bss.capability = cpu_to_le16(tmp);
1010 }
1011
1012 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1013 __le32 local_ps_mode = cpu_to_le32(LBS802_11POWERMODECAM);
1014
1015 /* wake up first */
1016 ret = lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1017 CMD_ACT_SET, 0, 0,
1018 &local_ps_mode);
1019 if (ret) {
1020 ret = -1;
1021 goto out;
1022 }
1023 }
1024
1025 ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_JOIN, &cmd);
1026 if (ret == 0) {
1027 ret = lbs_adhoc_post(priv,
1028 (struct cmd_ds_802_11_ad_hoc_result *)&cmd);
1029 }
1030
1031 out:
1032 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1033 return ret;
1034 }
1035
1036 /**
1037 * @brief Start an Adhoc Network
1038 *
1039 * @param priv A pointer to struct lbs_private structure
1040 * @param assoc_req The association request describing the BSS to start
1041 *
1042 * @return 0 on success, error on failure
1043 */
1044 static int lbs_adhoc_start(struct lbs_private *priv,
1045 struct assoc_request *assoc_req)
1046 {
1047 struct cmd_ds_802_11_ad_hoc_start cmd;
1048 u8 preamble = RADIO_PREAMBLE_SHORT;
1049 size_t ratesize = 0;
1050 u16 tmpcap = 0;
1051 int ret = 0;
1052 DECLARE_SSID_BUF(ssid);
1053
1054 lbs_deb_enter(LBS_DEB_ASSOC);
1055
1056 ret = lbs_set_radio(priv, preamble, 1);
1057 if (ret)
1058 goto out;
1059
1060 /* Build the start command */
1061 memset(&cmd, 0, sizeof(cmd));
1062 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1063
1064 memcpy(cmd.ssid, assoc_req->ssid, assoc_req->ssid_len);
1065
1066 lbs_deb_join("ADHOC_START: SSID '%s', ssid length %u\n",
1067 print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len),
1068 assoc_req->ssid_len);
1069
1070 cmd.bsstype = CMD_BSS_TYPE_IBSS;
1071
1072 if (priv->beacon_period == 0)
1073 priv->beacon_period = MRVDRV_BEACON_INTERVAL;
1074 cmd.beaconperiod = cpu_to_le16(priv->beacon_period);
1075
1076 WARN_ON(!assoc_req->channel);
1077
1078 /* set Physical parameter set */
1079 cmd.ds.header.id = WLAN_EID_DS_PARAMS;
1080 cmd.ds.header.len = 1;
1081 cmd.ds.channel = assoc_req->channel;
1082
1083 /* set IBSS parameter set */
1084 cmd.ibss.header.id = WLAN_EID_IBSS_PARAMS;
1085 cmd.ibss.header.len = 2;
1086 cmd.ibss.atimwindow = cpu_to_le16(0);
1087
1088 /* set capability info */
1089 tmpcap = WLAN_CAPABILITY_IBSS;
1090 if (assoc_req->secinfo.wep_enabled ||
1091 assoc_req->secinfo.WPAenabled ||
1092 assoc_req->secinfo.WPA2enabled) {
1093 lbs_deb_join("ADHOC_START: WEP/WPA enabled, privacy on\n");
1094 tmpcap |= WLAN_CAPABILITY_PRIVACY;
1095 } else
1096 lbs_deb_join("ADHOC_START: WEP disabled, privacy off\n");
1097
1098 cmd.capability = cpu_to_le16(tmpcap);
1099
1100 /* Only v8 and below support setting probe delay */
1101 if (priv->fwrelease < 0x09000000)
1102 cmd.probedelay = cpu_to_le16(CMD_SCAN_PROBE_DELAY_TIME);
1103
1104 ratesize = min(sizeof(cmd.rates), sizeof(lbs_bg_rates));
1105 memcpy(cmd.rates, lbs_bg_rates, ratesize);
1106
1107 /* Copy the ad-hoc creating rates into Current BSS state structure */
1108 memset(&priv->curbssparams.rates, 0, sizeof(priv->curbssparams.rates));
1109 memcpy(&priv->curbssparams.rates, &cmd.rates, ratesize);
1110
1111 /* Set MSB on basic rates as the firmware requires, but _after_
1112 * copying to current bss rates.
1113 */
1114 lbs_set_basic_rate_flags(cmd.rates, ratesize);
1115
1116 lbs_deb_join("ADHOC_START: rates=%02x %02x %02x %02x\n",
1117 cmd.rates[0], cmd.rates[1], cmd.rates[2], cmd.rates[3]);
1118
1119 lbs_deb_join("ADHOC_START: Starting Ad-Hoc BSS on channel %d, band %d\n",
1120 assoc_req->channel, assoc_req->band);
1121
1122 priv->adhoccreate = 1;
1123 priv->mode = IW_MODE_ADHOC;
1124
1125 ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_START, &cmd);
1126 if (ret == 0)
1127 ret = lbs_adhoc_post(priv,
1128 (struct cmd_ds_802_11_ad_hoc_result *)&cmd);
1129
1130 out:
1131 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1132 return ret;
1133 }
1134
1135 /**
1136 * @brief Stop and Ad-Hoc network and exit Ad-Hoc mode
1137 *
1138 * @param priv A pointer to struct lbs_private structure
1139 * @return 0 on success, or an error
1140 */
1141 int lbs_adhoc_stop(struct lbs_private *priv)
1142 {
1143 struct cmd_ds_802_11_ad_hoc_stop cmd;
1144 int ret;
1145
1146 lbs_deb_enter(LBS_DEB_JOIN);
1147
1148 memset(&cmd, 0, sizeof (cmd));
1149 cmd.hdr.size = cpu_to_le16 (sizeof (cmd));
1150
1151 ret = lbs_cmd_with_response(priv, CMD_802_11_AD_HOC_STOP, &cmd);
1152
1153 /* Clean up everything even if there was an error */
1154 lbs_mac_event_disconnected(priv);
1155
1156 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1157 return ret;
1158 }
1159
1160 static inline int match_bss_no_security(struct lbs_802_11_security *secinfo,
1161 struct bss_descriptor *match_bss)
1162 {
1163 if (!secinfo->wep_enabled && !secinfo->WPAenabled
1164 && !secinfo->WPA2enabled
1165 && match_bss->wpa_ie[0] != WLAN_EID_GENERIC
1166 && match_bss->rsn_ie[0] != WLAN_EID_RSN
1167 && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY))
1168 return 1;
1169 else
1170 return 0;
1171 }
1172
1173 static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo,
1174 struct bss_descriptor *match_bss)
1175 {
1176 if (secinfo->wep_enabled && !secinfo->WPAenabled
1177 && !secinfo->WPA2enabled
1178 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
1179 return 1;
1180 else
1181 return 0;
1182 }
1183
1184 static inline int match_bss_wpa(struct lbs_802_11_security *secinfo,
1185 struct bss_descriptor *match_bss)
1186 {
1187 if (!secinfo->wep_enabled && secinfo->WPAenabled
1188 && (match_bss->wpa_ie[0] == WLAN_EID_GENERIC)
1189 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
1190 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
1191 )
1192 return 1;
1193 else
1194 return 0;
1195 }
1196
1197 static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo,
1198 struct bss_descriptor *match_bss)
1199 {
1200 if (!secinfo->wep_enabled && secinfo->WPA2enabled &&
1201 (match_bss->rsn_ie[0] == WLAN_EID_RSN)
1202 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
1203 (match_bss->capability & WLAN_CAPABILITY_PRIVACY) */
1204 )
1205 return 1;
1206 else
1207 return 0;
1208 }
1209
1210 static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo,
1211 struct bss_descriptor *match_bss)
1212 {
1213 if (!secinfo->wep_enabled && !secinfo->WPAenabled
1214 && !secinfo->WPA2enabled
1215 && (match_bss->wpa_ie[0] != WLAN_EID_GENERIC)
1216 && (match_bss->rsn_ie[0] != WLAN_EID_RSN)
1217 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY))
1218 return 1;
1219 else
1220 return 0;
1221 }
1222
1223 /**
1224 * @brief Check if a scanned network compatible with the driver settings
1225 *
1226 * WEP WPA WPA2 ad-hoc encrypt Network
1227 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
1228 * 0 0 0 0 NONE 0 0 0 yes No security
1229 * 1 0 0 0 NONE 1 0 0 yes Static WEP
1230 * 0 1 0 0 x 1x 1 x yes WPA
1231 * 0 0 1 0 x 1x x 1 yes WPA2
1232 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
1233 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
1234 *
1235 *
1236 * @param priv A pointer to struct lbs_private
1237 * @param index Index in scantable to check against current driver settings
1238 * @param mode Network mode: Infrastructure or IBSS
1239 *
1240 * @return Index in scantable, or error code if negative
1241 */
1242 static int is_network_compatible(struct lbs_private *priv,
1243 struct bss_descriptor *bss, uint8_t mode)
1244 {
1245 int matched = 0;
1246
1247 lbs_deb_enter(LBS_DEB_SCAN);
1248
1249 if (bss->mode != mode)
1250 goto done;
1251
1252 matched = match_bss_no_security(&priv->secinfo, bss);
1253 if (matched)
1254 goto done;
1255 matched = match_bss_static_wep(&priv->secinfo, bss);
1256 if (matched)
1257 goto done;
1258 matched = match_bss_wpa(&priv->secinfo, bss);
1259 if (matched) {
1260 lbs_deb_scan("is_network_compatible() WPA: wpa_ie 0x%x "
1261 "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
1262 "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
1263 priv->secinfo.wep_enabled ? "e" : "d",
1264 priv->secinfo.WPAenabled ? "e" : "d",
1265 priv->secinfo.WPA2enabled ? "e" : "d",
1266 (bss->capability & WLAN_CAPABILITY_PRIVACY));
1267 goto done;
1268 }
1269 matched = match_bss_wpa2(&priv->secinfo, bss);
1270 if (matched) {
1271 lbs_deb_scan("is_network_compatible() WPA2: wpa_ie 0x%x "
1272 "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
1273 "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
1274 priv->secinfo.wep_enabled ? "e" : "d",
1275 priv->secinfo.WPAenabled ? "e" : "d",
1276 priv->secinfo.WPA2enabled ? "e" : "d",
1277 (bss->capability & WLAN_CAPABILITY_PRIVACY));
1278 goto done;
1279 }
1280 matched = match_bss_dynamic_wep(&priv->secinfo, bss);
1281 if (matched) {
1282 lbs_deb_scan("is_network_compatible() dynamic WEP: "
1283 "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n",
1284 bss->wpa_ie[0], bss->rsn_ie[0],
1285 (bss->capability & WLAN_CAPABILITY_PRIVACY));
1286 goto done;
1287 }
1288
1289 /* bss security settings don't match those configured on card */
1290 lbs_deb_scan("is_network_compatible() FAILED: wpa_ie 0x%x "
1291 "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n",
1292 bss->wpa_ie[0], bss->rsn_ie[0],
1293 priv->secinfo.wep_enabled ? "e" : "d",
1294 priv->secinfo.WPAenabled ? "e" : "d",
1295 priv->secinfo.WPA2enabled ? "e" : "d",
1296 (bss->capability & WLAN_CAPABILITY_PRIVACY));
1297
1298 done:
1299 lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched);
1300 return matched;
1301 }
1302
1303 /**
1304 * @brief This function finds a specific compatible BSSID in the scan list
1305 *
1306 * Used in association code
1307 *
1308 * @param priv A pointer to struct lbs_private
1309 * @param bssid BSSID to find in the scan list
1310 * @param mode Network mode: Infrastructure or IBSS
1311 *
1312 * @return index in BSSID list, or error return code (< 0)
1313 */
1314 static struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv,
1315 uint8_t *bssid, uint8_t mode)
1316 {
1317 struct bss_descriptor *iter_bss;
1318 struct bss_descriptor *found_bss = NULL;
1319
1320 lbs_deb_enter(LBS_DEB_SCAN);
1321
1322 if (!bssid)
1323 goto out;
1324
1325 lbs_deb_hex(LBS_DEB_SCAN, "looking for", bssid, ETH_ALEN);
1326
1327 /* Look through the scan table for a compatible match. The loop will
1328 * continue past a matched bssid that is not compatible in case there
1329 * is an AP with multiple SSIDs assigned to the same BSSID
1330 */
1331 mutex_lock(&priv->lock);
1332 list_for_each_entry(iter_bss, &priv->network_list, list) {
1333 if (compare_ether_addr(iter_bss->bssid, bssid))
1334 continue; /* bssid doesn't match */
1335 switch (mode) {
1336 case IW_MODE_INFRA:
1337 case IW_MODE_ADHOC:
1338 if (!is_network_compatible(priv, iter_bss, mode))
1339 break;
1340 found_bss = iter_bss;
1341 break;
1342 default:
1343 found_bss = iter_bss;
1344 break;
1345 }
1346 }
1347 mutex_unlock(&priv->lock);
1348
1349 out:
1350 lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
1351 return found_bss;
1352 }
1353
1354 /**
1355 * @brief This function finds ssid in ssid list.
1356 *
1357 * Used in association code
1358 *
1359 * @param priv A pointer to struct lbs_private
1360 * @param ssid SSID to find in the list
1361 * @param bssid BSSID to qualify the SSID selection (if provided)
1362 * @param mode Network mode: Infrastructure or IBSS
1363 *
1364 * @return index in BSSID list
1365 */
1366 static struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv,
1367 uint8_t *ssid, uint8_t ssid_len,
1368 uint8_t *bssid, uint8_t mode,
1369 int channel)
1370 {
1371 u32 bestrssi = 0;
1372 struct bss_descriptor *iter_bss = NULL;
1373 struct bss_descriptor *found_bss = NULL;
1374 struct bss_descriptor *tmp_oldest = NULL;
1375
1376 lbs_deb_enter(LBS_DEB_SCAN);
1377
1378 mutex_lock(&priv->lock);
1379
1380 list_for_each_entry(iter_bss, &priv->network_list, list) {
1381 if (!tmp_oldest ||
1382 (iter_bss->last_scanned < tmp_oldest->last_scanned))
1383 tmp_oldest = iter_bss;
1384
1385 if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len,
1386 ssid, ssid_len) != 0)
1387 continue; /* ssid doesn't match */
1388 if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0)
1389 continue; /* bssid doesn't match */
1390 if ((channel > 0) && (iter_bss->channel != channel))
1391 continue; /* channel doesn't match */
1392
1393 switch (mode) {
1394 case IW_MODE_INFRA:
1395 case IW_MODE_ADHOC:
1396 if (!is_network_compatible(priv, iter_bss, mode))
1397 break;
1398
1399 if (bssid) {
1400 /* Found requested BSSID */
1401 found_bss = iter_bss;
1402 goto out;
1403 }
1404
1405 if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
1406 bestrssi = SCAN_RSSI(iter_bss->rssi);
1407 found_bss = iter_bss;
1408 }
1409 break;
1410 case IW_MODE_AUTO:
1411 default:
1412 if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
1413 bestrssi = SCAN_RSSI(iter_bss->rssi);
1414 found_bss = iter_bss;
1415 }
1416 break;
1417 }
1418 }
1419
1420 out:
1421 mutex_unlock(&priv->lock);
1422 lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
1423 return found_bss;
1424 }
1425
1426 static int assoc_helper_essid(struct lbs_private *priv,
1427 struct assoc_request * assoc_req)
1428 {
1429 int ret = 0;
1430 struct bss_descriptor * bss;
1431 int channel = -1;
1432 DECLARE_SSID_BUF(ssid);
1433
1434 lbs_deb_enter(LBS_DEB_ASSOC);
1435
1436 /* FIXME: take channel into account when picking SSIDs if a channel
1437 * is set.
1438 */
1439
1440 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
1441 channel = assoc_req->channel;
1442
1443 lbs_deb_assoc("SSID '%s' requested\n",
1444 print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len));
1445 if (assoc_req->mode == IW_MODE_INFRA) {
1446 lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
1447 assoc_req->ssid_len);
1448
1449 bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
1450 assoc_req->ssid_len, NULL, IW_MODE_INFRA, channel);
1451 if (bss != NULL) {
1452 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
1453 ret = lbs_try_associate(priv, assoc_req);
1454 } else {
1455 lbs_deb_assoc("SSID not found; cannot associate\n");
1456 }
1457 } else if (assoc_req->mode == IW_MODE_ADHOC) {
1458 /* Scan for the network, do not save previous results. Stale
1459 * scan data will cause us to join a non-existant adhoc network
1460 */
1461 lbs_send_specific_ssid_scan(priv, assoc_req->ssid,
1462 assoc_req->ssid_len);
1463
1464 /* Search for the requested SSID in the scan table */
1465 bss = lbs_find_ssid_in_list(priv, assoc_req->ssid,
1466 assoc_req->ssid_len, NULL, IW_MODE_ADHOC, channel);
1467 if (bss != NULL) {
1468 lbs_deb_assoc("SSID found, will join\n");
1469 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
1470 lbs_adhoc_join(priv, assoc_req);
1471 } else {
1472 /* else send START command */
1473 lbs_deb_assoc("SSID not found, creating adhoc network\n");
1474 memcpy(&assoc_req->bss.ssid, &assoc_req->ssid,
1475 IEEE80211_MAX_SSID_LEN);
1476 assoc_req->bss.ssid_len = assoc_req->ssid_len;
1477 lbs_adhoc_start(priv, assoc_req);
1478 }
1479 }
1480
1481 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1482 return ret;
1483 }
1484
1485
1486 static int assoc_helper_bssid(struct lbs_private *priv,
1487 struct assoc_request * assoc_req)
1488 {
1489 int ret = 0;
1490 struct bss_descriptor * bss;
1491
1492 lbs_deb_enter_args(LBS_DEB_ASSOC, "BSSID %pM", assoc_req->bssid);
1493
1494 /* Search for index position in list for requested MAC */
1495 bss = lbs_find_bssid_in_list(priv, assoc_req->bssid,
1496 assoc_req->mode);
1497 if (bss == NULL) {
1498 lbs_deb_assoc("ASSOC: WAP: BSSID %pM not found, "
1499 "cannot associate.\n", assoc_req->bssid);
1500 goto out;
1501 }
1502
1503 memcpy(&assoc_req->bss, bss, sizeof(struct bss_descriptor));
1504 if (assoc_req->mode == IW_MODE_INFRA) {
1505 ret = lbs_try_associate(priv, assoc_req);
1506 lbs_deb_assoc("ASSOC: lbs_try_associate(bssid) returned %d\n",
1507 ret);
1508 } else if (assoc_req->mode == IW_MODE_ADHOC) {
1509 lbs_adhoc_join(priv, assoc_req);
1510 }
1511
1512 out:
1513 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1514 return ret;
1515 }
1516
1517
1518 static int assoc_helper_associate(struct lbs_private *priv,
1519 struct assoc_request * assoc_req)
1520 {
1521 int ret = 0, done = 0;
1522
1523 lbs_deb_enter(LBS_DEB_ASSOC);
1524
1525 /* If we're given and 'any' BSSID, try associating based on SSID */
1526
1527 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
1528 if (compare_ether_addr(bssid_any, assoc_req->bssid)
1529 && compare_ether_addr(bssid_off, assoc_req->bssid)) {
1530 ret = assoc_helper_bssid(priv, assoc_req);
1531 done = 1;
1532 }
1533 }
1534
1535 if (!done && test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
1536 ret = assoc_helper_essid(priv, assoc_req);
1537 }
1538
1539 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1540 return ret;
1541 }
1542
1543
1544 static int assoc_helper_mode(struct lbs_private *priv,
1545 struct assoc_request * assoc_req)
1546 {
1547 int ret = 0;
1548
1549 lbs_deb_enter(LBS_DEB_ASSOC);
1550
1551 if (assoc_req->mode == priv->mode)
1552 goto done;
1553
1554 if (assoc_req->mode == IW_MODE_INFRA) {
1555 if (priv->psstate != PS_STATE_FULL_POWER)
1556 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
1557 priv->psmode = LBS802_11POWERMODECAM;
1558 }
1559
1560 priv->mode = assoc_req->mode;
1561 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE,
1562 assoc_req->mode == IW_MODE_ADHOC ? 2 : 1);
1563
1564 done:
1565 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1566 return ret;
1567 }
1568
1569 static int assoc_helper_channel(struct lbs_private *priv,
1570 struct assoc_request * assoc_req)
1571 {
1572 int ret = 0;
1573
1574 lbs_deb_enter(LBS_DEB_ASSOC);
1575
1576 ret = lbs_update_channel(priv);
1577 if (ret) {
1578 lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
1579 goto done;
1580 }
1581
1582 if (assoc_req->channel == priv->channel)
1583 goto done;
1584
1585 if (priv->mesh_dev) {
1586 /* Change mesh channel first; 21.p21 firmware won't let
1587 you change channel otherwise (even though it'll return
1588 an error to this */
1589 lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP,
1590 assoc_req->channel);
1591 }
1592
1593 lbs_deb_assoc("ASSOC: channel: %d -> %d\n",
1594 priv->channel, assoc_req->channel);
1595
1596 ret = lbs_set_channel(priv, assoc_req->channel);
1597 if (ret < 0)
1598 lbs_deb_assoc("ASSOC: channel: error setting channel.\n");
1599
1600 /* FIXME: shouldn't need to grab the channel _again_ after setting
1601 * it since the firmware is supposed to return the new channel, but
1602 * whatever... */
1603 ret = lbs_update_channel(priv);
1604 if (ret) {
1605 lbs_deb_assoc("ASSOC: channel: error getting channel.\n");
1606 goto done;
1607 }
1608
1609 if (assoc_req->channel != priv->channel) {
1610 lbs_deb_assoc("ASSOC: channel: failed to update channel to %d\n",
1611 assoc_req->channel);
1612 goto restore_mesh;
1613 }
1614
1615 if ( assoc_req->secinfo.wep_enabled
1616 && (assoc_req->wep_keys[0].len
1617 || assoc_req->wep_keys[1].len
1618 || assoc_req->wep_keys[2].len
1619 || assoc_req->wep_keys[3].len)) {
1620 /* Make sure WEP keys are re-sent to firmware */
1621 set_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags);
1622 }
1623
1624 /* Must restart/rejoin adhoc networks after channel change */
1625 set_bit(ASSOC_FLAG_SSID, &assoc_req->flags);
1626
1627 restore_mesh:
1628 if (priv->mesh_dev)
1629 lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_START,
1630 priv->channel);
1631
1632 done:
1633 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1634 return ret;
1635 }
1636
1637
1638 static int assoc_helper_wep_keys(struct lbs_private *priv,
1639 struct assoc_request *assoc_req)
1640 {
1641 int i;
1642 int ret = 0;
1643
1644 lbs_deb_enter(LBS_DEB_ASSOC);
1645
1646 /* Set or remove WEP keys */
1647 if (assoc_req->wep_keys[0].len || assoc_req->wep_keys[1].len ||
1648 assoc_req->wep_keys[2].len || assoc_req->wep_keys[3].len)
1649 ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_ADD, assoc_req);
1650 else
1651 ret = lbs_cmd_802_11_set_wep(priv, CMD_ACT_REMOVE, assoc_req);
1652
1653 if (ret)
1654 goto out;
1655
1656 /* enable/disable the MAC's WEP packet filter */
1657 if (assoc_req->secinfo.wep_enabled)
1658 priv->mac_control |= CMD_ACT_MAC_WEP_ENABLE;
1659 else
1660 priv->mac_control &= ~CMD_ACT_MAC_WEP_ENABLE;
1661
1662 lbs_set_mac_control(priv);
1663
1664 mutex_lock(&priv->lock);
1665
1666 /* Copy WEP keys into priv wep key fields */
1667 for (i = 0; i < 4; i++) {
1668 memcpy(&priv->wep_keys[i], &assoc_req->wep_keys[i],
1669 sizeof(struct enc_key));
1670 }
1671 priv->wep_tx_keyidx = assoc_req->wep_tx_keyidx;
1672
1673 mutex_unlock(&priv->lock);
1674
1675 out:
1676 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1677 return ret;
1678 }
1679
1680 static int assoc_helper_secinfo(struct lbs_private *priv,
1681 struct assoc_request * assoc_req)
1682 {
1683 int ret = 0;
1684 uint16_t do_wpa;
1685 uint16_t rsn = 0;
1686
1687 lbs_deb_enter(LBS_DEB_ASSOC);
1688
1689 memcpy(&priv->secinfo, &assoc_req->secinfo,
1690 sizeof(struct lbs_802_11_security));
1691
1692 lbs_set_mac_control(priv);
1693
1694 /* If RSN is already enabled, don't try to enable it again, since
1695 * ENABLE_RSN resets internal state machines and will clobber the
1696 * 4-way WPA handshake.
1697 */
1698
1699 /* Get RSN enabled/disabled */
1700 ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_GET, &rsn);
1701 if (ret) {
1702 lbs_deb_assoc("Failed to get RSN status: %d\n", ret);
1703 goto out;
1704 }
1705
1706 /* Don't re-enable RSN if it's already enabled */
1707 do_wpa = assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled;
1708 if (do_wpa == rsn)
1709 goto out;
1710
1711 /* Set RSN enabled/disabled */
1712 ret = lbs_cmd_802_11_enable_rsn(priv, CMD_ACT_SET, &do_wpa);
1713
1714 out:
1715 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1716 return ret;
1717 }
1718
1719
1720 static int assoc_helper_wpa_keys(struct lbs_private *priv,
1721 struct assoc_request * assoc_req)
1722 {
1723 int ret = 0;
1724 unsigned int flags = assoc_req->flags;
1725
1726 lbs_deb_enter(LBS_DEB_ASSOC);
1727
1728 /* Work around older firmware bug where WPA unicast and multicast
1729 * keys must be set independently. Seen in SDIO parts with firmware
1730 * version 5.0.11p0.
1731 */
1732
1733 if (test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
1734 clear_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags);
1735 ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req);
1736 assoc_req->flags = flags;
1737 }
1738
1739 if (ret)
1740 goto out;
1741
1742 memcpy(&priv->wpa_unicast_key, &assoc_req->wpa_unicast_key,
1743 sizeof(struct enc_key));
1744
1745 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
1746 clear_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags);
1747
1748 ret = lbs_cmd_802_11_key_material(priv, CMD_ACT_SET, assoc_req);
1749 assoc_req->flags = flags;
1750
1751 memcpy(&priv->wpa_mcast_key, &assoc_req->wpa_mcast_key,
1752 sizeof(struct enc_key));
1753 }
1754
1755 out:
1756 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1757 return ret;
1758 }
1759
1760
1761 static int assoc_helper_wpa_ie(struct lbs_private *priv,
1762 struct assoc_request * assoc_req)
1763 {
1764 int ret = 0;
1765
1766 lbs_deb_enter(LBS_DEB_ASSOC);
1767
1768 if (assoc_req->secinfo.WPAenabled || assoc_req->secinfo.WPA2enabled) {
1769 memcpy(&priv->wpa_ie, &assoc_req->wpa_ie, assoc_req->wpa_ie_len);
1770 priv->wpa_ie_len = assoc_req->wpa_ie_len;
1771 } else {
1772 memset(&priv->wpa_ie, 0, MAX_WPA_IE_LEN);
1773 priv->wpa_ie_len = 0;
1774 }
1775
1776 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1777 return ret;
1778 }
1779
1780
1781 static int should_deauth_infrastructure(struct lbs_private *priv,
1782 struct assoc_request * assoc_req)
1783 {
1784 int ret = 0;
1785
1786 if (priv->connect_status != LBS_CONNECTED)
1787 return 0;
1788
1789 lbs_deb_enter(LBS_DEB_ASSOC);
1790 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
1791 lbs_deb_assoc("Deauthenticating due to new SSID\n");
1792 ret = 1;
1793 goto out;
1794 }
1795
1796 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
1797 if (priv->secinfo.auth_mode != assoc_req->secinfo.auth_mode) {
1798 lbs_deb_assoc("Deauthenticating due to new security\n");
1799 ret = 1;
1800 goto out;
1801 }
1802 }
1803
1804 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
1805 lbs_deb_assoc("Deauthenticating due to new BSSID\n");
1806 ret = 1;
1807 goto out;
1808 }
1809
1810 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
1811 lbs_deb_assoc("Deauthenticating due to channel switch\n");
1812 ret = 1;
1813 goto out;
1814 }
1815
1816 /* FIXME: deal with 'auto' mode somehow */
1817 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
1818 if (assoc_req->mode != IW_MODE_INFRA) {
1819 lbs_deb_assoc("Deauthenticating due to leaving "
1820 "infra mode\n");
1821 ret = 1;
1822 goto out;
1823 }
1824 }
1825
1826 out:
1827 lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
1828 return ret;
1829 }
1830
1831
1832 static int should_stop_adhoc(struct lbs_private *priv,
1833 struct assoc_request * assoc_req)
1834 {
1835 lbs_deb_enter(LBS_DEB_ASSOC);
1836
1837 if (priv->connect_status != LBS_CONNECTED)
1838 return 0;
1839
1840 if (lbs_ssid_cmp(priv->curbssparams.ssid,
1841 priv->curbssparams.ssid_len,
1842 assoc_req->ssid, assoc_req->ssid_len) != 0)
1843 return 1;
1844
1845 /* FIXME: deal with 'auto' mode somehow */
1846 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
1847 if (assoc_req->mode != IW_MODE_ADHOC)
1848 return 1;
1849 }
1850
1851 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
1852 if (assoc_req->channel != priv->channel)
1853 return 1;
1854 }
1855
1856 lbs_deb_leave(LBS_DEB_ASSOC);
1857 return 0;
1858 }
1859
1860
1861 /**
1862 * @brief This function finds the best SSID in the Scan List
1863 *
1864 * Search the scan table for the best SSID that also matches the current
1865 * adapter network preference (infrastructure or adhoc)
1866 *
1867 * @param priv A pointer to struct lbs_private
1868 *
1869 * @return index in BSSID list
1870 */
1871 static struct bss_descriptor *lbs_find_best_ssid_in_list(
1872 struct lbs_private *priv, uint8_t mode)
1873 {
1874 uint8_t bestrssi = 0;
1875 struct bss_descriptor *iter_bss;
1876 struct bss_descriptor *best_bss = NULL;
1877
1878 lbs_deb_enter(LBS_DEB_SCAN);
1879
1880 mutex_lock(&priv->lock);
1881
1882 list_for_each_entry(iter_bss, &priv->network_list, list) {
1883 switch (mode) {
1884 case IW_MODE_INFRA:
1885 case IW_MODE_ADHOC:
1886 if (!is_network_compatible(priv, iter_bss, mode))
1887 break;
1888 if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
1889 break;
1890 bestrssi = SCAN_RSSI(iter_bss->rssi);
1891 best_bss = iter_bss;
1892 break;
1893 case IW_MODE_AUTO:
1894 default:
1895 if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
1896 break;
1897 bestrssi = SCAN_RSSI(iter_bss->rssi);
1898 best_bss = iter_bss;
1899 break;
1900 }
1901 }
1902
1903 mutex_unlock(&priv->lock);
1904 lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss);
1905 return best_bss;
1906 }
1907
1908 /**
1909 * @brief Find the best AP
1910 *
1911 * Used from association worker.
1912 *
1913 * @param priv A pointer to struct lbs_private structure
1914 * @param pSSID A pointer to AP's ssid
1915 *
1916 * @return 0--success, otherwise--fail
1917 */
1918 static int lbs_find_best_network_ssid(struct lbs_private *priv,
1919 uint8_t *out_ssid, uint8_t *out_ssid_len, uint8_t preferred_mode,
1920 uint8_t *out_mode)
1921 {
1922 int ret = -1;
1923 struct bss_descriptor *found;
1924
1925 lbs_deb_enter(LBS_DEB_SCAN);
1926
1927 priv->scan_ssid_len = 0;
1928 lbs_scan_networks(priv, 1);
1929 if (priv->surpriseremoved)
1930 goto out;
1931
1932 found = lbs_find_best_ssid_in_list(priv, preferred_mode);
1933 if (found && (found->ssid_len > 0)) {
1934 memcpy(out_ssid, &found->ssid, IEEE80211_MAX_SSID_LEN);
1935 *out_ssid_len = found->ssid_len;
1936 *out_mode = found->mode;
1937 ret = 0;
1938 }
1939
1940 out:
1941 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1942 return ret;
1943 }
1944
1945
1946 void lbs_association_worker(struct work_struct *work)
1947 {
1948 struct lbs_private *priv = container_of(work, struct lbs_private,
1949 assoc_work.work);
1950 struct assoc_request * assoc_req = NULL;
1951 int ret = 0;
1952 int find_any_ssid = 0;
1953 DECLARE_SSID_BUF(ssid);
1954
1955 lbs_deb_enter(LBS_DEB_ASSOC);
1956
1957 mutex_lock(&priv->lock);
1958 assoc_req = priv->pending_assoc_req;
1959 priv->pending_assoc_req = NULL;
1960 priv->in_progress_assoc_req = assoc_req;
1961 mutex_unlock(&priv->lock);
1962
1963 if (!assoc_req)
1964 goto done;
1965
1966 lbs_deb_assoc(
1967 "Association Request:\n"
1968 " flags: 0x%08lx\n"
1969 " SSID: '%s'\n"
1970 " chann: %d\n"
1971 " band: %d\n"
1972 " mode: %d\n"
1973 " BSSID: %pM\n"
1974 " secinfo: %s%s%s\n"
1975 " auth_mode: %d\n",
1976 assoc_req->flags,
1977 print_ssid(ssid, assoc_req->ssid, assoc_req->ssid_len),
1978 assoc_req->channel, assoc_req->band, assoc_req->mode,
1979 assoc_req->bssid,
1980 assoc_req->secinfo.WPAenabled ? " WPA" : "",
1981 assoc_req->secinfo.WPA2enabled ? " WPA2" : "",
1982 assoc_req->secinfo.wep_enabled ? " WEP" : "",
1983 assoc_req->secinfo.auth_mode);
1984
1985 /* If 'any' SSID was specified, find an SSID to associate with */
1986 if (test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)
1987 && !assoc_req->ssid_len)
1988 find_any_ssid = 1;
1989
1990 /* But don't use 'any' SSID if there's a valid locked BSSID to use */
1991 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
1992 if (compare_ether_addr(assoc_req->bssid, bssid_any)
1993 && compare_ether_addr(assoc_req->bssid, bssid_off))
1994 find_any_ssid = 0;
1995 }
1996
1997 if (find_any_ssid) {
1998 u8 new_mode = assoc_req->mode;
1999
2000 ret = lbs_find_best_network_ssid(priv, assoc_req->ssid,
2001 &assoc_req->ssid_len, assoc_req->mode, &new_mode);
2002 if (ret) {
2003 lbs_deb_assoc("Could not find best network\n");
2004 ret = -ENETUNREACH;
2005 goto out;
2006 }
2007
2008 /* Ensure we switch to the mode of the AP */
2009 if (assoc_req->mode == IW_MODE_AUTO) {
2010 set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
2011 assoc_req->mode = new_mode;
2012 }
2013 }
2014
2015 /*
2016 * Check if the attributes being changing require deauthentication
2017 * from the currently associated infrastructure access point.
2018 */
2019 if (priv->mode == IW_MODE_INFRA) {
2020 if (should_deauth_infrastructure(priv, assoc_req)) {
2021 ret = lbs_cmd_80211_deauthenticate(priv,
2022 priv->curbssparams.bssid,
2023 WLAN_REASON_DEAUTH_LEAVING);
2024 if (ret) {
2025 lbs_deb_assoc("Deauthentication due to new "
2026 "configuration request failed: %d\n",
2027 ret);
2028 }
2029 }
2030 } else if (priv->mode == IW_MODE_ADHOC) {
2031 if (should_stop_adhoc(priv, assoc_req)) {
2032 ret = lbs_adhoc_stop(priv);
2033 if (ret) {
2034 lbs_deb_assoc("Teardown of AdHoc network due to "
2035 "new configuration request failed: %d\n",
2036 ret);
2037 }
2038
2039 }
2040 }
2041
2042 /* Send the various configuration bits to the firmware */
2043 if (test_bit(ASSOC_FLAG_MODE, &assoc_req->flags)) {
2044 ret = assoc_helper_mode(priv, assoc_req);
2045 if (ret)
2046 goto out;
2047 }
2048
2049 if (test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags)) {
2050 ret = assoc_helper_channel(priv, assoc_req);
2051 if (ret)
2052 goto out;
2053 }
2054
2055 if (test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
2056 ret = assoc_helper_secinfo(priv, assoc_req);
2057 if (ret)
2058 goto out;
2059 }
2060
2061 if (test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
2062 ret = assoc_helper_wpa_ie(priv, assoc_req);
2063 if (ret)
2064 goto out;
2065 }
2066
2067 if (test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)
2068 || test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
2069 ret = assoc_helper_wpa_keys(priv, assoc_req);
2070 if (ret)
2071 goto out;
2072 }
2073
2074 if ( test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)
2075 || test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags)) {
2076 ret = assoc_helper_wep_keys(priv, assoc_req);
2077 if (ret)
2078 goto out;
2079 }
2080
2081
2082 /* SSID/BSSID should be the _last_ config option set, because they
2083 * trigger the association attempt.
2084 */
2085 if (test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)
2086 || test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
2087 int success = 1;
2088
2089 ret = assoc_helper_associate(priv, assoc_req);
2090 if (ret) {
2091 lbs_deb_assoc("ASSOC: association unsuccessful: %d\n",
2092 ret);
2093 success = 0;
2094 }
2095
2096 if (priv->connect_status != LBS_CONNECTED) {
2097 lbs_deb_assoc("ASSOC: association unsuccessful, "
2098 "not connected\n");
2099 success = 0;
2100 }
2101
2102 if (success) {
2103 lbs_deb_assoc("associated to %pM\n",
2104 priv->curbssparams.bssid);
2105 lbs_prepare_and_send_command(priv,
2106 CMD_802_11_RSSI,
2107 0, CMD_OPTION_WAITFORRSP, 0, NULL);
2108 } else {
2109 ret = -1;
2110 }
2111 }
2112
2113 out:
2114 if (ret) {
2115 lbs_deb_assoc("ASSOC: reconfiguration attempt unsuccessful: %d\n",
2116 ret);
2117 }
2118
2119 mutex_lock(&priv->lock);
2120 priv->in_progress_assoc_req = NULL;
2121 mutex_unlock(&priv->lock);
2122 kfree(assoc_req);
2123
2124 done:
2125 lbs_deb_leave(LBS_DEB_ASSOC);
2126 }
2127
2128
2129 /*
2130 * Caller MUST hold any necessary locks
2131 */
2132 struct assoc_request *lbs_get_association_request(struct lbs_private *priv)
2133 {
2134 struct assoc_request * assoc_req;
2135
2136 lbs_deb_enter(LBS_DEB_ASSOC);
2137 if (!priv->pending_assoc_req) {
2138 priv->pending_assoc_req = kzalloc(sizeof(struct assoc_request),
2139 GFP_KERNEL);
2140 if (!priv->pending_assoc_req) {
2141 lbs_pr_info("Not enough memory to allocate association"
2142 " request!\n");
2143 return NULL;
2144 }
2145 }
2146
2147 /* Copy current configuration attributes to the association request,
2148 * but don't overwrite any that are already set.
2149 */
2150 assoc_req = priv->pending_assoc_req;
2151 if (!test_bit(ASSOC_FLAG_SSID, &assoc_req->flags)) {
2152 memcpy(&assoc_req->ssid, &priv->curbssparams.ssid,
2153 IEEE80211_MAX_SSID_LEN);
2154 assoc_req->ssid_len = priv->curbssparams.ssid_len;
2155 }
2156
2157 if (!test_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags))
2158 assoc_req->channel = priv->channel;
2159
2160 if (!test_bit(ASSOC_FLAG_BAND, &assoc_req->flags))
2161 assoc_req->band = priv->curbssparams.band;
2162
2163 if (!test_bit(ASSOC_FLAG_MODE, &assoc_req->flags))
2164 assoc_req->mode = priv->mode;
2165
2166 if (!test_bit(ASSOC_FLAG_BSSID, &assoc_req->flags)) {
2167 memcpy(&assoc_req->bssid, priv->curbssparams.bssid,
2168 ETH_ALEN);
2169 }
2170
2171 if (!test_bit(ASSOC_FLAG_WEP_KEYS, &assoc_req->flags)) {
2172 int i;
2173 for (i = 0; i < 4; i++) {
2174 memcpy(&assoc_req->wep_keys[i], &priv->wep_keys[i],
2175 sizeof(struct enc_key));
2176 }
2177 }
2178
2179 if (!test_bit(ASSOC_FLAG_WEP_TX_KEYIDX, &assoc_req->flags))
2180 assoc_req->wep_tx_keyidx = priv->wep_tx_keyidx;
2181
2182 if (!test_bit(ASSOC_FLAG_WPA_MCAST_KEY, &assoc_req->flags)) {
2183 memcpy(&assoc_req->wpa_mcast_key, &priv->wpa_mcast_key,
2184 sizeof(struct enc_key));
2185 }
2186
2187 if (!test_bit(ASSOC_FLAG_WPA_UCAST_KEY, &assoc_req->flags)) {
2188 memcpy(&assoc_req->wpa_unicast_key, &priv->wpa_unicast_key,
2189 sizeof(struct enc_key));
2190 }
2191
2192 if (!test_bit(ASSOC_FLAG_SECINFO, &assoc_req->flags)) {
2193 memcpy(&assoc_req->secinfo, &priv->secinfo,
2194 sizeof(struct lbs_802_11_security));
2195 }
2196
2197 if (!test_bit(ASSOC_FLAG_WPA_IE, &assoc_req->flags)) {
2198 memcpy(&assoc_req->wpa_ie, &priv->wpa_ie,
2199 MAX_WPA_IE_LEN);
2200 assoc_req->wpa_ie_len = priv->wpa_ie_len;
2201 }
2202
2203 lbs_deb_leave(LBS_DEB_ASSOC);
2204 return assoc_req;
2205 }
2206
2207
2208 /**
2209 * @brief Deauthenticate from a specific BSS
2210 *
2211 * @param priv A pointer to struct lbs_private structure
2212 * @param bssid The specific BSS to deauthenticate from
2213 * @param reason The 802.11 sec. 7.3.1.7 Reason Code for deauthenticating
2214 *
2215 * @return 0 on success, error on failure
2216 */
2217 int lbs_cmd_80211_deauthenticate(struct lbs_private *priv, u8 bssid[ETH_ALEN],
2218 u16 reason)
2219 {
2220 struct cmd_ds_802_11_deauthenticate cmd;
2221 int ret;
2222
2223 lbs_deb_enter(LBS_DEB_JOIN);
2224
2225 memset(&cmd, 0, sizeof(cmd));
2226 cmd.hdr.size = cpu_to_le16(sizeof(cmd));
2227 memcpy(cmd.macaddr, &bssid[0], ETH_ALEN);
2228 cmd.reasoncode = cpu_to_le16(reason);
2229
2230 ret = lbs_cmd_with_response(priv, CMD_802_11_DEAUTHENTICATE, &cmd);
2231
2232 /* Clean up everything even if there was an error; can't assume that
2233 * we're still authenticated to the AP after trying to deauth.
2234 */
2235 lbs_mac_event_disconnected(priv);
2236
2237 lbs_deb_leave(LBS_DEB_JOIN);
2238 return ret;
2239 }
2240
Linux kernel - Deliverables
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