Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/net/wireless/rndis_wlan.c

  1 /*
  2  * Driver for RNDIS based wireless USB devices.
  3  *
  4  * Copyright (C) 2007 by Bjorge Dijkstra <bjd@jooz.net>
  5  * Copyright (C) 2008-2009 by Jussi Kivilinna <jussi.kivilinna@iki.fi>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License as published by
  9  * the Free Software Foundation; either version 2 of the License, or
 10  * (at your option) any later version.
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  *
 17  * You should have received a copy of the GNU General Public License
 18  * along with this program; if not, see <http://www.gnu.org/licenses/>.
 19  *
 20  *  Portions of this file are based on NDISwrapper project,
 21  *  Copyright (C) 2003-2005 Pontus Fuchs, Giridhar Pemmasani
 22  *  http://ndiswrapper.sourceforge.net/
 23  */
 24 
 25 // #define      DEBUG                   // error path messages, extra info
 26 // #define      VERBOSE                 // more; success messages
 27 
 28 #include <linux/module.h>
 29 #include <linux/netdevice.h>
 30 #include <linux/etherdevice.h>
 31 #include <linux/ethtool.h>
 32 #include <linux/workqueue.h>
 33 #include <linux/mutex.h>
 34 #include <linux/mii.h>
 35 #include <linux/usb.h>
 36 #include <linux/usb/cdc.h>
 37 #include <linux/ieee80211.h>
 38 #include <linux/if_arp.h>
 39 #include <linux/ctype.h>
 40 #include <linux/spinlock.h>
 41 #include <linux/slab.h>
 42 #include <net/cfg80211.h>
 43 #include <linux/usb/usbnet.h>
 44 #include <linux/usb/rndis_host.h>
 45 
 46 
 47 /* NOTE: All these are settings for Broadcom chipset */
 48 static char modparam_country[4] = "EU";
 49 module_param_string(country, modparam_country, 4, 0444);
 50 MODULE_PARM_DESC(country, "Country code (ISO 3166-1 alpha-2), default: EU");
 51 
 52 static int modparam_frameburst = 1;
 53 module_param_named(frameburst, modparam_frameburst, int, 0444);
 54 MODULE_PARM_DESC(frameburst, "enable frame bursting (default: on)");
 55 
 56 static int modparam_afterburner = 0;
 57 module_param_named(afterburner, modparam_afterburner, int, 0444);
 58 MODULE_PARM_DESC(afterburner,
 59         "enable afterburner aka '125 High Speed Mode' (default: off)");
 60 
 61 static int modparam_power_save = 0;
 62 module_param_named(power_save, modparam_power_save, int, 0444);
 63 MODULE_PARM_DESC(power_save,
 64         "set power save mode: 0=off, 1=on, 2=fast (default: off)");
 65 
 66 static int modparam_power_output = 3;
 67 module_param_named(power_output, modparam_power_output, int, 0444);
 68 MODULE_PARM_DESC(power_output,
 69         "set power output: 0=25%, 1=50%, 2=75%, 3=100% (default: 100%)");
 70 
 71 static int modparam_roamtrigger = -70;
 72 module_param_named(roamtrigger, modparam_roamtrigger, int, 0444);
 73 MODULE_PARM_DESC(roamtrigger,
 74         "set roaming dBm trigger: -80=optimize for distance, "
 75                                 "-60=bandwidth (default: -70)");
 76 
 77 static int modparam_roamdelta = 1;
 78 module_param_named(roamdelta, modparam_roamdelta, int, 0444);
 79 MODULE_PARM_DESC(roamdelta,
 80         "set roaming tendency: 0=aggressive, 1=moderate, "
 81                                 "2=conservative (default: moderate)");
 82 
 83 static int modparam_workaround_interval;
 84 module_param_named(workaround_interval, modparam_workaround_interval,
 85                                                         int, 0444);
 86 MODULE_PARM_DESC(workaround_interval,
 87         "set stall workaround interval in msecs (0=disabled) (default: 0)");
 88 
 89 /* Typical noise/maximum signal level values taken from ndiswrapper iw_ndis.h */
 90 #define WL_NOISE        -96     /* typical noise level in dBm */
 91 #define WL_SIGMAX       -32     /* typical maximum signal level in dBm */
 92 
 93 
 94 /* Assume that Broadcom 4320 (only chipset at time of writing known to be
 95  * based on wireless rndis) has default txpower of 13dBm.
 96  * This value is from Linksys WUSB54GSC User Guide, Appendix F: Specifications.
 97  *  100% : 20 mW ~ 13dBm
 98  *   75% : 15 mW ~ 12dBm
 99  *   50% : 10 mW ~ 10dBm
100  *   25% :  5 mW ~  7dBm
101  */
102 #define BCM4320_DEFAULT_TXPOWER_DBM_100 13
103 #define BCM4320_DEFAULT_TXPOWER_DBM_75  12
104 #define BCM4320_DEFAULT_TXPOWER_DBM_50  10
105 #define BCM4320_DEFAULT_TXPOWER_DBM_25  7
106 
107 /* Known device types */
108 #define RNDIS_UNKNOWN   0
109 #define RNDIS_BCM4320A  1
110 #define RNDIS_BCM4320B  2
111 
112 
113 /* NDIS data structures. Taken from wpa_supplicant driver_ndis.c
114  * slightly modified for datatype endianess, etc
115  */
116 #define NDIS_802_11_LENGTH_SSID 32
117 #define NDIS_802_11_LENGTH_RATES 8
118 #define NDIS_802_11_LENGTH_RATES_EX 16
119 
120 enum ndis_80211_net_type {
121         NDIS_80211_TYPE_FREQ_HOP,
122         NDIS_80211_TYPE_DIRECT_SEQ,
123         NDIS_80211_TYPE_OFDM_A,
124         NDIS_80211_TYPE_OFDM_G
125 };
126 
127 enum ndis_80211_net_infra {
128         NDIS_80211_INFRA_ADHOC,
129         NDIS_80211_INFRA_INFRA,
130         NDIS_80211_INFRA_AUTO_UNKNOWN
131 };
132 
133 enum ndis_80211_auth_mode {
134         NDIS_80211_AUTH_OPEN,
135         NDIS_80211_AUTH_SHARED,
136         NDIS_80211_AUTH_AUTO_SWITCH,
137         NDIS_80211_AUTH_WPA,
138         NDIS_80211_AUTH_WPA_PSK,
139         NDIS_80211_AUTH_WPA_NONE,
140         NDIS_80211_AUTH_WPA2,
141         NDIS_80211_AUTH_WPA2_PSK
142 };
143 
144 enum ndis_80211_encr_status {
145         NDIS_80211_ENCR_WEP_ENABLED,
146         NDIS_80211_ENCR_DISABLED,
147         NDIS_80211_ENCR_WEP_KEY_ABSENT,
148         NDIS_80211_ENCR_NOT_SUPPORTED,
149         NDIS_80211_ENCR_TKIP_ENABLED,
150         NDIS_80211_ENCR_TKIP_KEY_ABSENT,
151         NDIS_80211_ENCR_CCMP_ENABLED,
152         NDIS_80211_ENCR_CCMP_KEY_ABSENT
153 };
154 
155 enum ndis_80211_priv_filter {
156         NDIS_80211_PRIV_ACCEPT_ALL,
157         NDIS_80211_PRIV_8021X_WEP
158 };
159 
160 enum ndis_80211_status_type {
161         NDIS_80211_STATUSTYPE_AUTHENTICATION,
162         NDIS_80211_STATUSTYPE_MEDIASTREAMMODE,
163         NDIS_80211_STATUSTYPE_PMKID_CANDIDATELIST,
164         NDIS_80211_STATUSTYPE_RADIOSTATE,
165 };
166 
167 enum ndis_80211_media_stream_mode {
168         NDIS_80211_MEDIA_STREAM_OFF,
169         NDIS_80211_MEDIA_STREAM_ON
170 };
171 
172 enum ndis_80211_radio_status {
173         NDIS_80211_RADIO_STATUS_ON,
174         NDIS_80211_RADIO_STATUS_HARDWARE_OFF,
175         NDIS_80211_RADIO_STATUS_SOFTWARE_OFF,
176 };
177 
178 enum ndis_80211_addkey_bits {
179         NDIS_80211_ADDKEY_8021X_AUTH = cpu_to_le32(1 << 28),
180         NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ = cpu_to_le32(1 << 29),
181         NDIS_80211_ADDKEY_PAIRWISE_KEY = cpu_to_le32(1 << 30),
182         NDIS_80211_ADDKEY_TRANSMIT_KEY = cpu_to_le32(1 << 31)
183 };
184 
185 enum ndis_80211_addwep_bits {
186         NDIS_80211_ADDWEP_PERCLIENT_KEY = cpu_to_le32(1 << 30),
187         NDIS_80211_ADDWEP_TRANSMIT_KEY = cpu_to_le32(1 << 31)
188 };
189 
190 enum ndis_80211_power_mode {
191         NDIS_80211_POWER_MODE_CAM,
192         NDIS_80211_POWER_MODE_MAX_PSP,
193         NDIS_80211_POWER_MODE_FAST_PSP,
194 };
195 
196 enum ndis_80211_pmkid_cand_list_flag_bits {
197         NDIS_80211_PMKID_CAND_PREAUTH = cpu_to_le32(1 << 0)
198 };
199 
200 struct ndis_80211_auth_request {
201         __le32 length;
202         u8 bssid[6];
203         u8 padding[2];
204         __le32 flags;
205 } __packed;
206 
207 struct ndis_80211_pmkid_candidate {
208         u8 bssid[6];
209         u8 padding[2];
210         __le32 flags;
211 } __packed;
212 
213 struct ndis_80211_pmkid_cand_list {
214         __le32 version;
215         __le32 num_candidates;
216         struct ndis_80211_pmkid_candidate candidate_list[0];
217 } __packed;
218 
219 struct ndis_80211_status_indication {
220         __le32 status_type;
221         union {
222                 __le32                                  media_stream_mode;
223                 __le32                                  radio_status;
224                 struct ndis_80211_auth_request          auth_request[0];
225                 struct ndis_80211_pmkid_cand_list       cand_list;
226         } u;
227 } __packed;
228 
229 struct ndis_80211_ssid {
230         __le32 length;
231         u8 essid[NDIS_802_11_LENGTH_SSID];
232 } __packed;
233 
234 struct ndis_80211_conf_freq_hop {
235         __le32 length;
236         __le32 hop_pattern;
237         __le32 hop_set;
238         __le32 dwell_time;
239 } __packed;
240 
241 struct ndis_80211_conf {
242         __le32 length;
243         __le32 beacon_period;
244         __le32 atim_window;
245         __le32 ds_config;
246         struct ndis_80211_conf_freq_hop fh_config;
247 } __packed;
248 
249 struct ndis_80211_bssid_ex {
250         __le32 length;
251         u8 mac[6];
252         u8 padding[2];
253         struct ndis_80211_ssid ssid;
254         __le32 privacy;
255         __le32 rssi;
256         __le32 net_type;
257         struct ndis_80211_conf config;
258         __le32 net_infra;
259         u8 rates[NDIS_802_11_LENGTH_RATES_EX];
260         __le32 ie_length;
261         u8 ies[0];
262 } __packed;
263 
264 struct ndis_80211_bssid_list_ex {
265         __le32 num_items;
266         struct ndis_80211_bssid_ex bssid[0];
267 } __packed;
268 
269 struct ndis_80211_fixed_ies {
270         u8 timestamp[8];
271         __le16 beacon_interval;
272         __le16 capabilities;
273 } __packed;
274 
275 struct ndis_80211_wep_key {
276         __le32 size;
277         __le32 index;
278         __le32 length;
279         u8 material[32];
280 } __packed;
281 
282 struct ndis_80211_key {
283         __le32 size;
284         __le32 index;
285         __le32 length;
286         u8 bssid[6];
287         u8 padding[6];
288         u8 rsc[8];
289         u8 material[32];
290 } __packed;
291 
292 struct ndis_80211_remove_key {
293         __le32 size;
294         __le32 index;
295         u8 bssid[6];
296         u8 padding[2];
297 } __packed;
298 
299 struct ndis_config_param {
300         __le32 name_offs;
301         __le32 name_length;
302         __le32 type;
303         __le32 value_offs;
304         __le32 value_length;
305 } __packed;
306 
307 struct ndis_80211_assoc_info {
308         __le32 length;
309         __le16 req_ies;
310         struct req_ie {
311                 __le16 capa;
312                 __le16 listen_interval;
313                 u8 cur_ap_address[6];
314         } req_ie;
315         __le32 req_ie_length;
316         __le32 offset_req_ies;
317         __le16 resp_ies;
318         struct resp_ie {
319                 __le16 capa;
320                 __le16 status_code;
321                 __le16 assoc_id;
322         } resp_ie;
323         __le32 resp_ie_length;
324         __le32 offset_resp_ies;
325 } __packed;
326 
327 struct ndis_80211_auth_encr_pair {
328         __le32 auth_mode;
329         __le32 encr_mode;
330 } __packed;
331 
332 struct ndis_80211_capability {
333         __le32 length;
334         __le32 version;
335         __le32 num_pmkids;
336         __le32 num_auth_encr_pair;
337         struct ndis_80211_auth_encr_pair auth_encr_pair[0];
338 } __packed;
339 
340 struct ndis_80211_bssid_info {
341         u8 bssid[6];
342         u8 pmkid[16];
343 } __packed;
344 
345 struct ndis_80211_pmkid {
346         __le32 length;
347         __le32 bssid_info_count;
348         struct ndis_80211_bssid_info bssid_info[0];
349 } __packed;
350 
351 /*
352  *  private data
353  */
354 #define CAP_MODE_80211A         1
355 #define CAP_MODE_80211B         2
356 #define CAP_MODE_80211G         4
357 #define CAP_MODE_MASK           7
358 
359 #define WORK_LINK_UP            (1<<0)
360 #define WORK_LINK_DOWN          (1<<1)
361 #define WORK_SET_MULTICAST_LIST (1<<2)
362 
363 #define RNDIS_WLAN_ALG_NONE     0
364 #define RNDIS_WLAN_ALG_WEP      (1<<0)
365 #define RNDIS_WLAN_ALG_TKIP     (1<<1)
366 #define RNDIS_WLAN_ALG_CCMP     (1<<2)
367 
368 #define RNDIS_WLAN_NUM_KEYS             4
369 #define RNDIS_WLAN_KEY_MGMT_NONE        0
370 #define RNDIS_WLAN_KEY_MGMT_802_1X      (1<<0)
371 #define RNDIS_WLAN_KEY_MGMT_PSK         (1<<1)
372 
373 #define COMMAND_BUFFER_SIZE     (CONTROL_BUFFER_SIZE + sizeof(struct rndis_set))
374 
375 static const struct ieee80211_channel rndis_channels[] = {
376         { .center_freq = 2412 },
377         { .center_freq = 2417 },
378         { .center_freq = 2422 },
379         { .center_freq = 2427 },
380         { .center_freq = 2432 },
381         { .center_freq = 2437 },
382         { .center_freq = 2442 },
383         { .center_freq = 2447 },
384         { .center_freq = 2452 },
385         { .center_freq = 2457 },
386         { .center_freq = 2462 },
387         { .center_freq = 2467 },
388         { .center_freq = 2472 },
389         { .center_freq = 2484 },
390 };
391 
392 static const struct ieee80211_rate rndis_rates[] = {
393         { .bitrate = 10 },
394         { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
395         { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
396         { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
397         { .bitrate = 60 },
398         { .bitrate = 90 },
399         { .bitrate = 120 },
400         { .bitrate = 180 },
401         { .bitrate = 240 },
402         { .bitrate = 360 },
403         { .bitrate = 480 },
404         { .bitrate = 540 }
405 };
406 
407 static const u32 rndis_cipher_suites[] = {
408         WLAN_CIPHER_SUITE_WEP40,
409         WLAN_CIPHER_SUITE_WEP104,
410         WLAN_CIPHER_SUITE_TKIP,
411         WLAN_CIPHER_SUITE_CCMP,
412 };
413 
414 struct rndis_wlan_encr_key {
415         int len;
416         u32 cipher;
417         u8 material[32];
418         u8 bssid[ETH_ALEN];
419         bool pairwise;
420         bool tx_key;
421 };
422 
423 /* RNDIS device private data */
424 struct rndis_wlan_private {
425         struct usbnet *usbdev;
426 
427         struct wireless_dev wdev;
428 
429         struct cfg80211_scan_request *scan_request;
430 
431         struct workqueue_struct *workqueue;
432         struct delayed_work dev_poller_work;
433         struct delayed_work scan_work;
434         struct work_struct work;
435         struct mutex command_lock;
436         unsigned long work_pending;
437         int last_qual;
438         s32 cqm_rssi_thold;
439         u32 cqm_rssi_hyst;
440         int last_cqm_event_rssi;
441 
442         struct ieee80211_supported_band band;
443         struct ieee80211_channel channels[ARRAY_SIZE(rndis_channels)];
444         struct ieee80211_rate rates[ARRAY_SIZE(rndis_rates)];
445         u32 cipher_suites[ARRAY_SIZE(rndis_cipher_suites)];
446 
447         int device_type;
448         int caps;
449         int multicast_size;
450 
451         /* module parameters */
452         char param_country[4];
453         int  param_frameburst;
454         int  param_afterburner;
455         int  param_power_save;
456         int  param_power_output;
457         int  param_roamtrigger;
458         int  param_roamdelta;
459         u32  param_workaround_interval;
460 
461         /* hardware state */
462         bool radio_on;
463         int power_mode;
464         int infra_mode;
465         bool connected;
466         u8 bssid[ETH_ALEN];
467         u32 current_command_oid;
468 
469         /* encryption stuff */
470         u8 encr_tx_key_index;
471         struct rndis_wlan_encr_key encr_keys[RNDIS_WLAN_NUM_KEYS];
472         int  wpa_version;
473 
474         u8 command_buffer[COMMAND_BUFFER_SIZE];
475 };
476 
477 /*
478  * cfg80211 ops
479  */
480 static int rndis_change_virtual_intf(struct wiphy *wiphy,
481                                         struct net_device *dev,
482                                         enum nl80211_iftype type, u32 *flags,
483                                         struct vif_params *params);
484 
485 static int rndis_scan(struct wiphy *wiphy,
486                         struct cfg80211_scan_request *request);
487 
488 static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed);
489 
490 static int rndis_set_tx_power(struct wiphy *wiphy,
491                               struct wireless_dev *wdev,
492                               enum nl80211_tx_power_setting type,
493                               int mbm);
494 static int rndis_get_tx_power(struct wiphy *wiphy,
495                               struct wireless_dev *wdev,
496                               int *dbm);
497 
498 static int rndis_connect(struct wiphy *wiphy, struct net_device *dev,
499                                 struct cfg80211_connect_params *sme);
500 
501 static int rndis_disconnect(struct wiphy *wiphy, struct net_device *dev,
502                                 u16 reason_code);
503 
504 static int rndis_join_ibss(struct wiphy *wiphy, struct net_device *dev,
505                                         struct cfg80211_ibss_params *params);
506 
507 static int rndis_leave_ibss(struct wiphy *wiphy, struct net_device *dev);
508 
509 static int rndis_add_key(struct wiphy *wiphy, struct net_device *netdev,
510                          u8 key_index, bool pairwise, const u8 *mac_addr,
511                          struct key_params *params);
512 
513 static int rndis_del_key(struct wiphy *wiphy, struct net_device *netdev,
514                          u8 key_index, bool pairwise, const u8 *mac_addr);
515 
516 static int rndis_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
517                                  u8 key_index, bool unicast, bool multicast);
518 
519 static int rndis_get_station(struct wiphy *wiphy, struct net_device *dev,
520                              const u8 *mac, struct station_info *sinfo);
521 
522 static int rndis_dump_station(struct wiphy *wiphy, struct net_device *dev,
523                                int idx, u8 *mac, struct station_info *sinfo);
524 
525 static int rndis_set_pmksa(struct wiphy *wiphy, struct net_device *netdev,
526                                 struct cfg80211_pmksa *pmksa);
527 
528 static int rndis_del_pmksa(struct wiphy *wiphy, struct net_device *netdev,
529                                 struct cfg80211_pmksa *pmksa);
530 
531 static int rndis_flush_pmksa(struct wiphy *wiphy, struct net_device *netdev);
532 
533 static int rndis_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
534                                 bool enabled, int timeout);
535 
536 static int rndis_set_cqm_rssi_config(struct wiphy *wiphy,
537                                         struct net_device *dev,
538                                         s32 rssi_thold, u32 rssi_hyst);
539 
540 static const struct cfg80211_ops rndis_config_ops = {
541         .change_virtual_intf = rndis_change_virtual_intf,
542         .scan = rndis_scan,
543         .set_wiphy_params = rndis_set_wiphy_params,
544         .set_tx_power = rndis_set_tx_power,
545         .get_tx_power = rndis_get_tx_power,
546         .connect = rndis_connect,
547         .disconnect = rndis_disconnect,
548         .join_ibss = rndis_join_ibss,
549         .leave_ibss = rndis_leave_ibss,
550         .add_key = rndis_add_key,
551         .del_key = rndis_del_key,
552         .set_default_key = rndis_set_default_key,
553         .get_station = rndis_get_station,
554         .dump_station = rndis_dump_station,
555         .set_pmksa = rndis_set_pmksa,
556         .del_pmksa = rndis_del_pmksa,
557         .flush_pmksa = rndis_flush_pmksa,
558         .set_power_mgmt = rndis_set_power_mgmt,
559         .set_cqm_rssi_config = rndis_set_cqm_rssi_config,
560 };
561 
562 static void *rndis_wiphy_privid = &rndis_wiphy_privid;
563 
564 
565 static struct rndis_wlan_private *get_rndis_wlan_priv(struct usbnet *dev)
566 {
567         return (struct rndis_wlan_private *)dev->driver_priv;
568 }
569 
570 static u32 get_bcm4320_power_dbm(struct rndis_wlan_private *priv)
571 {
572         switch (priv->param_power_output) {
573         default:
574         case 3:
575                 return BCM4320_DEFAULT_TXPOWER_DBM_100;
576         case 2:
577                 return BCM4320_DEFAULT_TXPOWER_DBM_75;
578         case 1:
579                 return BCM4320_DEFAULT_TXPOWER_DBM_50;
580         case 0:
581                 return BCM4320_DEFAULT_TXPOWER_DBM_25;
582         }
583 }
584 
585 static bool is_wpa_key(struct rndis_wlan_private *priv, u8 idx)
586 {
587         int cipher = priv->encr_keys[idx].cipher;
588 
589         return (cipher == WLAN_CIPHER_SUITE_CCMP ||
590                 cipher == WLAN_CIPHER_SUITE_TKIP);
591 }
592 
593 static int rndis_cipher_to_alg(u32 cipher)
594 {
595         switch (cipher) {
596         default:
597                 return RNDIS_WLAN_ALG_NONE;
598         case WLAN_CIPHER_SUITE_WEP40:
599         case WLAN_CIPHER_SUITE_WEP104:
600                 return RNDIS_WLAN_ALG_WEP;
601         case WLAN_CIPHER_SUITE_TKIP:
602                 return RNDIS_WLAN_ALG_TKIP;
603         case WLAN_CIPHER_SUITE_CCMP:
604                 return RNDIS_WLAN_ALG_CCMP;
605         }
606 }
607 
608 static int rndis_akm_suite_to_key_mgmt(u32 akm_suite)
609 {
610         switch (akm_suite) {
611         default:
612                 return RNDIS_WLAN_KEY_MGMT_NONE;
613         case WLAN_AKM_SUITE_8021X:
614                 return RNDIS_WLAN_KEY_MGMT_802_1X;
615         case WLAN_AKM_SUITE_PSK:
616                 return RNDIS_WLAN_KEY_MGMT_PSK;
617         }
618 }
619 
620 #ifdef DEBUG
621 static const char *oid_to_string(u32 oid)
622 {
623         switch (oid) {
624 #define OID_STR(oid) case oid: return(#oid)
625                 /* from rndis_host.h */
626                 OID_STR(RNDIS_OID_802_3_PERMANENT_ADDRESS);
627                 OID_STR(RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE);
628                 OID_STR(RNDIS_OID_GEN_CURRENT_PACKET_FILTER);
629                 OID_STR(RNDIS_OID_GEN_PHYSICAL_MEDIUM);
630 
631                 /* from rndis_wlan.c */
632                 OID_STR(RNDIS_OID_GEN_LINK_SPEED);
633                 OID_STR(RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER);
634 
635                 OID_STR(RNDIS_OID_GEN_XMIT_OK);
636                 OID_STR(RNDIS_OID_GEN_RCV_OK);
637                 OID_STR(RNDIS_OID_GEN_XMIT_ERROR);
638                 OID_STR(RNDIS_OID_GEN_RCV_ERROR);
639                 OID_STR(RNDIS_OID_GEN_RCV_NO_BUFFER);
640 
641                 OID_STR(RNDIS_OID_802_3_CURRENT_ADDRESS);
642                 OID_STR(RNDIS_OID_802_3_MULTICAST_LIST);
643                 OID_STR(RNDIS_OID_802_3_MAXIMUM_LIST_SIZE);
644 
645                 OID_STR(RNDIS_OID_802_11_BSSID);
646                 OID_STR(RNDIS_OID_802_11_SSID);
647                 OID_STR(RNDIS_OID_802_11_INFRASTRUCTURE_MODE);
648                 OID_STR(RNDIS_OID_802_11_ADD_WEP);
649                 OID_STR(RNDIS_OID_802_11_REMOVE_WEP);
650                 OID_STR(RNDIS_OID_802_11_DISASSOCIATE);
651                 OID_STR(RNDIS_OID_802_11_AUTHENTICATION_MODE);
652                 OID_STR(RNDIS_OID_802_11_PRIVACY_FILTER);
653                 OID_STR(RNDIS_OID_802_11_BSSID_LIST_SCAN);
654                 OID_STR(RNDIS_OID_802_11_ENCRYPTION_STATUS);
655                 OID_STR(RNDIS_OID_802_11_ADD_KEY);
656                 OID_STR(RNDIS_OID_802_11_REMOVE_KEY);
657                 OID_STR(RNDIS_OID_802_11_ASSOCIATION_INFORMATION);
658                 OID_STR(RNDIS_OID_802_11_CAPABILITY);
659                 OID_STR(RNDIS_OID_802_11_PMKID);
660                 OID_STR(RNDIS_OID_802_11_NETWORK_TYPES_SUPPORTED);
661                 OID_STR(RNDIS_OID_802_11_NETWORK_TYPE_IN_USE);
662                 OID_STR(RNDIS_OID_802_11_TX_POWER_LEVEL);
663                 OID_STR(RNDIS_OID_802_11_RSSI);
664                 OID_STR(RNDIS_OID_802_11_RSSI_TRIGGER);
665                 OID_STR(RNDIS_OID_802_11_FRAGMENTATION_THRESHOLD);
666                 OID_STR(RNDIS_OID_802_11_RTS_THRESHOLD);
667                 OID_STR(RNDIS_OID_802_11_SUPPORTED_RATES);
668                 OID_STR(RNDIS_OID_802_11_CONFIGURATION);
669                 OID_STR(RNDIS_OID_802_11_POWER_MODE);
670                 OID_STR(RNDIS_OID_802_11_BSSID_LIST);
671 #undef OID_STR
672         }
673 
674         return "?";
675 }
676 #else
677 static const char *oid_to_string(u32 oid)
678 {
679         return "?";
680 }
681 #endif
682 
683 /* translate error code */
684 static int rndis_error_status(__le32 rndis_status)
685 {
686         int ret = -EINVAL;
687         switch (le32_to_cpu(rndis_status)) {
688         case RNDIS_STATUS_SUCCESS:
689                 ret = 0;
690                 break;
691         case RNDIS_STATUS_FAILURE:
692         case RNDIS_STATUS_INVALID_DATA:
693                 ret = -EINVAL;
694                 break;
695         case RNDIS_STATUS_NOT_SUPPORTED:
696                 ret = -EOPNOTSUPP;
697                 break;
698         case RNDIS_STATUS_ADAPTER_NOT_READY:
699         case RNDIS_STATUS_ADAPTER_NOT_OPEN:
700                 ret = -EBUSY;
701                 break;
702         }
703         return ret;
704 }
705 
706 static int rndis_query_oid(struct usbnet *dev, u32 oid, void *data, int *len)
707 {
708         struct rndis_wlan_private *priv = get_rndis_wlan_priv(dev);
709         union {
710                 void                    *buf;
711                 struct rndis_msg_hdr    *header;
712                 struct rndis_query      *get;
713                 struct rndis_query_c    *get_c;
714         } u;
715         int ret, buflen;
716         int resplen, respoffs, copylen;
717 
718         buflen = *len + sizeof(*u.get);
719         if (buflen < CONTROL_BUFFER_SIZE)
720                 buflen = CONTROL_BUFFER_SIZE;
721 
722         if (buflen > COMMAND_BUFFER_SIZE) {
723                 u.buf = kmalloc(buflen, GFP_KERNEL);
724                 if (!u.buf)
725                         return -ENOMEM;
726         } else {
727                 u.buf = priv->command_buffer;
728         }
729 
730         mutex_lock(&priv->command_lock);
731 
732         memset(u.get, 0, sizeof *u.get);
733         u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY);
734         u.get->msg_len = cpu_to_le32(sizeof *u.get);
735         u.get->oid = cpu_to_le32(oid);
736 
737         priv->current_command_oid = oid;
738         ret = rndis_command(dev, u.header, buflen);
739         priv->current_command_oid = 0;
740         if (ret < 0)
741                 netdev_dbg(dev->net, "%s(%s): rndis_command() failed, %d (%08x)\n",
742                            __func__, oid_to_string(oid), ret,
743                            le32_to_cpu(u.get_c->status));
744 
745         if (ret == 0) {
746                 resplen = le32_to_cpu(u.get_c->len);
747                 respoffs = le32_to_cpu(u.get_c->offset) + 8;
748 
749                 if (respoffs > buflen) {
750                         /* Device returned data offset outside buffer, error. */
751                         netdev_dbg(dev->net, "%s(%s): received invalid "
752                                 "data offset: %d > %d\n", __func__,
753                                 oid_to_string(oid), respoffs, buflen);
754 
755                         ret = -EINVAL;
756                         goto exit_unlock;
757                 }
758 
759                 if ((resplen + respoffs) > buflen) {
760                         /* Device would have returned more data if buffer would
761                          * have been big enough. Copy just the bits that we got.
762                          */
763                         copylen = buflen - respoffs;
764                 } else {
765                         copylen = resplen;
766                 }
767 
768                 if (copylen > *len)
769                         copylen = *len;
770 
771                 memcpy(data, u.buf + respoffs, copylen);
772 
773                 *len = resplen;
774 
775                 ret = rndis_error_status(u.get_c->status);
776                 if (ret < 0)
777                         netdev_dbg(dev->net, "%s(%s): device returned error,  0x%08x (%d)\n",
778                                    __func__, oid_to_string(oid),
779                                    le32_to_cpu(u.get_c->status), ret);
780         }
781 
782 exit_unlock:
783         mutex_unlock(&priv->command_lock);
784 
785         if (u.buf != priv->command_buffer)
786                 kfree(u.buf);
787         return ret;
788 }
789 
790 static int rndis_set_oid(struct usbnet *dev, u32 oid, const void *data,
791                          int len)
792 {
793         struct rndis_wlan_private *priv = get_rndis_wlan_priv(dev);
794         union {
795                 void                    *buf;
796                 struct rndis_msg_hdr    *header;
797                 struct rndis_set        *set;
798                 struct rndis_set_c      *set_c;
799         } u;
800         int ret, buflen;
801 
802         buflen = len + sizeof(*u.set);
803         if (buflen < CONTROL_BUFFER_SIZE)
804                 buflen = CONTROL_BUFFER_SIZE;
805 
806         if (buflen > COMMAND_BUFFER_SIZE) {
807                 u.buf = kmalloc(buflen, GFP_KERNEL);
808                 if (!u.buf)
809                         return -ENOMEM;
810         } else {
811                 u.buf = priv->command_buffer;
812         }
813 
814         mutex_lock(&priv->command_lock);
815 
816         memset(u.set, 0, sizeof *u.set);
817         u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET);
818         u.set->msg_len = cpu_to_le32(sizeof(*u.set) + len);
819         u.set->oid = cpu_to_le32(oid);
820         u.set->len = cpu_to_le32(len);
821         u.set->offset = cpu_to_le32(sizeof(*u.set) - 8);
822         u.set->handle = cpu_to_le32(0);
823         memcpy(u.buf + sizeof(*u.set), data, len);
824 
825         priv->current_command_oid = oid;
826         ret = rndis_command(dev, u.header, buflen);
827         priv->current_command_oid = 0;
828         if (ret < 0)
829                 netdev_dbg(dev->net, "%s(%s): rndis_command() failed, %d (%08x)\n",
830                            __func__, oid_to_string(oid), ret,
831                            le32_to_cpu(u.set_c->status));
832 
833         if (ret == 0) {
834                 ret = rndis_error_status(u.set_c->status);
835 
836                 if (ret < 0)
837                         netdev_dbg(dev->net, "%s(%s): device returned error, 0x%08x (%d)\n",
838                                    __func__, oid_to_string(oid),
839                                    le32_to_cpu(u.set_c->status), ret);
840         }
841 
842         mutex_unlock(&priv->command_lock);
843 
844         if (u.buf != priv->command_buffer)
845                 kfree(u.buf);
846         return ret;
847 }
848 
849 static int rndis_reset(struct usbnet *usbdev)
850 {
851         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
852         struct rndis_reset *reset;
853         int ret;
854 
855         mutex_lock(&priv->command_lock);
856 
857         reset = (void *)priv->command_buffer;
858         memset(reset, 0, sizeof(*reset));
859         reset->msg_type = cpu_to_le32(RNDIS_MSG_RESET);
860         reset->msg_len = cpu_to_le32(sizeof(*reset));
861         priv->current_command_oid = 0;
862         ret = rndis_command(usbdev, (void *)reset, CONTROL_BUFFER_SIZE);
863 
864         mutex_unlock(&priv->command_lock);
865 
866         if (ret < 0)
867                 return ret;
868         return 0;
869 }
870 
871 /*
872  * Specs say that we can only set config parameters only soon after device
873  * initialization.
874  *   value_type: 0 = u32, 2 = unicode string
875  */
876 static int rndis_set_config_parameter(struct usbnet *dev, char *param,
877                                                 int value_type, void *value)
878 {
879         struct ndis_config_param *infobuf;
880         int value_len, info_len, param_len, ret, i;
881         __le16 *unibuf;
882         __le32 *dst_value;
883 
884         if (value_type == 0)
885                 value_len = sizeof(__le32);
886         else if (value_type == 2)
887                 value_len = strlen(value) * sizeof(__le16);
888         else
889                 return -EINVAL;
890 
891         param_len = strlen(param) * sizeof(__le16);
892         info_len = sizeof(*infobuf) + param_len + value_len;
893 
894 #ifdef DEBUG
895         info_len += 12;
896 #endif
897         infobuf = kmalloc(info_len, GFP_KERNEL);
898         if (!infobuf)
899                 return -ENOMEM;
900 
901 #ifdef DEBUG
902         info_len -= 12;
903         /* extra 12 bytes are for padding (debug output) */
904         memset(infobuf, 0xCC, info_len + 12);
905 #endif
906 
907         if (value_type == 2)
908                 netdev_dbg(dev->net, "setting config parameter: %s, value: %s\n",
909                            param, (u8 *)value);
910         else
911                 netdev_dbg(dev->net, "setting config parameter: %s, value: %d\n",
912                            param, *(u32 *)value);
913 
914         infobuf->name_offs = cpu_to_le32(sizeof(*infobuf));
915         infobuf->name_length = cpu_to_le32(param_len);
916         infobuf->type = cpu_to_le32(value_type);
917         infobuf->value_offs = cpu_to_le32(sizeof(*infobuf) + param_len);
918         infobuf->value_length = cpu_to_le32(value_len);
919 
920         /* simple string to unicode string conversion */
921         unibuf = (void *)infobuf + sizeof(*infobuf);
922         for (i = 0; i < param_len / sizeof(__le16); i++)
923                 unibuf[i] = cpu_to_le16(param[i]);
924 
925         if (value_type == 2) {
926                 unibuf = (void *)infobuf + sizeof(*infobuf) + param_len;
927                 for (i = 0; i < value_len / sizeof(__le16); i++)
928                         unibuf[i] = cpu_to_le16(((u8 *)value)[i]);
929         } else {
930                 dst_value = (void *)infobuf + sizeof(*infobuf) + param_len;
931                 *dst_value = cpu_to_le32(*(u32 *)value);
932         }
933 
934 #ifdef DEBUG
935         netdev_dbg(dev->net, "info buffer (len: %d)\n", info_len);
936         for (i = 0; i < info_len; i += 12) {
937                 u32 *tmp = (u32 *)((u8 *)infobuf + i);
938                 netdev_dbg(dev->net, "%08X:%08X:%08X\n",
939                            cpu_to_be32(tmp[0]),
940                            cpu_to_be32(tmp[1]),
941                            cpu_to_be32(tmp[2]));
942         }
943 #endif
944 
945         ret = rndis_set_oid(dev, RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER,
946                                                         infobuf, info_len);
947         if (ret != 0)
948                 netdev_dbg(dev->net, "setting rndis config parameter failed, %d\n",
949                            ret);
950 
951         kfree(infobuf);
952         return ret;
953 }
954 
955 static int rndis_set_config_parameter_str(struct usbnet *dev,
956                                                 char *param, char *value)
957 {
958         return rndis_set_config_parameter(dev, param, 2, value);
959 }
960 
961 /*
962  * data conversion functions
963  */
964 static int level_to_qual(int level)
965 {
966         int qual = 100 * (level - WL_NOISE) / (WL_SIGMAX - WL_NOISE);
967         return qual >= 0 ? (qual <= 100 ? qual : 100) : 0;
968 }
969 
970 /*
971  * common functions
972  */
973 static int set_infra_mode(struct usbnet *usbdev, int mode);
974 static void restore_keys(struct usbnet *usbdev);
975 static int rndis_check_bssid_list(struct usbnet *usbdev, u8 *match_bssid,
976                                         bool *matched);
977 
978 static int rndis_start_bssid_list_scan(struct usbnet *usbdev)
979 {
980         __le32 tmp;
981 
982         /* Note: RNDIS_OID_802_11_BSSID_LIST_SCAN clears internal BSS list. */
983         tmp = cpu_to_le32(1);
984         return rndis_set_oid(usbdev, RNDIS_OID_802_11_BSSID_LIST_SCAN, &tmp,
985                                                         sizeof(tmp));
986 }
987 
988 static int set_essid(struct usbnet *usbdev, struct ndis_80211_ssid *ssid)
989 {
990         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
991         int ret;
992 
993         ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_SSID,
994                             ssid, sizeof(*ssid));
995         if (ret < 0) {
996                 netdev_warn(usbdev->net, "setting SSID failed (%08X)\n", ret);
997                 return ret;
998         }
999         if (ret == 0) {
1000                 priv->radio_on = true;
1001                 netdev_dbg(usbdev->net, "%s(): radio_on = true\n", __func__);
1002         }
1003 
1004         return ret;
1005 }
1006 
1007 static int set_bssid(struct usbnet *usbdev, const u8 *bssid)
1008 {
1009         int ret;
1010 
1011         ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_BSSID,
1012                             bssid, ETH_ALEN);
1013         if (ret < 0) {
1014                 netdev_warn(usbdev->net, "setting BSSID[%pM] failed (%08X)\n",
1015                             bssid, ret);
1016                 return ret;
1017         }
1018 
1019         return ret;
1020 }
1021 
1022 static int clear_bssid(struct usbnet *usbdev)
1023 {
1024         static const u8 broadcast_mac[ETH_ALEN] = {
1025                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
1026         };
1027 
1028         return set_bssid(usbdev, broadcast_mac);
1029 }
1030 
1031 static int get_bssid(struct usbnet *usbdev, u8 bssid[ETH_ALEN])
1032 {
1033         int ret, len;
1034 
1035         len = ETH_ALEN;
1036         ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_BSSID,
1037                               bssid, &len);
1038 
1039         if (ret != 0)
1040                 memset(bssid, 0, ETH_ALEN);
1041 
1042         return ret;
1043 }
1044 
1045 static int get_association_info(struct usbnet *usbdev,
1046                         struct ndis_80211_assoc_info *info, int len)
1047 {
1048         return rndis_query_oid(usbdev,
1049                         RNDIS_OID_802_11_ASSOCIATION_INFORMATION,
1050                         info, &len);
1051 }
1052 
1053 static bool is_associated(struct usbnet *usbdev)
1054 {
1055         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1056         u8 bssid[ETH_ALEN];
1057         int ret;
1058 
1059         if (!priv->radio_on)
1060                 return false;
1061 
1062         ret = get_bssid(usbdev, bssid);
1063 
1064         return (ret == 0 && !is_zero_ether_addr(bssid));
1065 }
1066 
1067 static int disassociate(struct usbnet *usbdev, bool reset_ssid)
1068 {
1069         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1070         struct ndis_80211_ssid ssid;
1071         int i, ret = 0;
1072 
1073         if (priv->radio_on) {
1074                 ret = rndis_set_oid(usbdev,
1075                                 RNDIS_OID_802_11_DISASSOCIATE,
1076                                 NULL, 0);
1077                 if (ret == 0) {
1078                         priv->radio_on = false;
1079                         netdev_dbg(usbdev->net, "%s(): radio_on = false\n",
1080                                    __func__);
1081 
1082                         if (reset_ssid)
1083                                 msleep(100);
1084                 }
1085         }
1086 
1087         /* disassociate causes radio to be turned off; if reset_ssid
1088          * is given, set random ssid to enable radio */
1089         if (reset_ssid) {
1090                 /* Set device to infrastructure mode so we don't get ad-hoc
1091                  * 'media connect' indications with the random ssid.
1092                  */
1093                 set_infra_mode(usbdev, NDIS_80211_INFRA_INFRA);
1094 
1095                 ssid.length = cpu_to_le32(sizeof(ssid.essid));
1096                 get_random_bytes(&ssid.essid[2], sizeof(ssid.essid)-2);
1097                 ssid.essid[0] = 0x1;
1098                 ssid.essid[1] = 0xff;
1099                 for (i = 2; i < sizeof(ssid.essid); i++)
1100                         ssid.essid[i] = 0x1 + (ssid.essid[i] * 0xfe / 0xff);
1101                 ret = set_essid(usbdev, &ssid);
1102         }
1103         return ret;
1104 }
1105 
1106 static int set_auth_mode(struct usbnet *usbdev, u32 wpa_version,
1107                                 enum nl80211_auth_type auth_type, int keymgmt)
1108 {
1109         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1110         __le32 tmp;
1111         int auth_mode, ret;
1112 
1113         netdev_dbg(usbdev->net, "%s(): wpa_version=0x%x authalg=0x%x keymgmt=0x%x\n",
1114                    __func__, wpa_version, auth_type, keymgmt);
1115 
1116         if (wpa_version & NL80211_WPA_VERSION_2) {
1117                 if (keymgmt & RNDIS_WLAN_KEY_MGMT_802_1X)
1118                         auth_mode = NDIS_80211_AUTH_WPA2;
1119                 else
1120                         auth_mode = NDIS_80211_AUTH_WPA2_PSK;
1121         } else if (wpa_version & NL80211_WPA_VERSION_1) {
1122                 if (keymgmt & RNDIS_WLAN_KEY_MGMT_802_1X)
1123                         auth_mode = NDIS_80211_AUTH_WPA;
1124                 else if (keymgmt & RNDIS_WLAN_KEY_MGMT_PSK)
1125                         auth_mode = NDIS_80211_AUTH_WPA_PSK;
1126                 else
1127                         auth_mode = NDIS_80211_AUTH_WPA_NONE;
1128         } else if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
1129                 auth_mode = NDIS_80211_AUTH_SHARED;
1130         else if (auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM)
1131                 auth_mode = NDIS_80211_AUTH_OPEN;
1132         else if (auth_type == NL80211_AUTHTYPE_AUTOMATIC)
1133                 auth_mode = NDIS_80211_AUTH_AUTO_SWITCH;
1134         else
1135                 return -ENOTSUPP;
1136 
1137         tmp = cpu_to_le32(auth_mode);
1138         ret = rndis_set_oid(usbdev,
1139                             RNDIS_OID_802_11_AUTHENTICATION_MODE,
1140                             &tmp, sizeof(tmp));
1141         if (ret != 0) {
1142                 netdev_warn(usbdev->net, "setting auth mode failed (%08X)\n",
1143                             ret);
1144                 return ret;
1145         }
1146 
1147         priv->wpa_version = wpa_version;
1148 
1149         return 0;
1150 }
1151 
1152 static int set_priv_filter(struct usbnet *usbdev)
1153 {
1154         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1155         __le32 tmp;
1156 
1157         netdev_dbg(usbdev->net, "%s(): wpa_version=0x%x\n",
1158                    __func__, priv->wpa_version);
1159 
1160         if (priv->wpa_version & NL80211_WPA_VERSION_2 ||
1161             priv->wpa_version & NL80211_WPA_VERSION_1)
1162                 tmp = cpu_to_le32(NDIS_80211_PRIV_8021X_WEP);
1163         else
1164                 tmp = cpu_to_le32(NDIS_80211_PRIV_ACCEPT_ALL);
1165 
1166         return rndis_set_oid(usbdev,
1167                              RNDIS_OID_802_11_PRIVACY_FILTER, &tmp,
1168                              sizeof(tmp));
1169 }
1170 
1171 static int set_encr_mode(struct usbnet *usbdev, int pairwise, int groupwise)
1172 {
1173         __le32 tmp;
1174         int encr_mode, ret;
1175 
1176         netdev_dbg(usbdev->net, "%s(): cipher_pair=0x%x cipher_group=0x%x\n",
1177                    __func__, pairwise, groupwise);
1178 
1179         if (pairwise & RNDIS_WLAN_ALG_CCMP)
1180                 encr_mode = NDIS_80211_ENCR_CCMP_ENABLED;
1181         else if (pairwise & RNDIS_WLAN_ALG_TKIP)
1182                 encr_mode = NDIS_80211_ENCR_TKIP_ENABLED;
1183         else if (pairwise & RNDIS_WLAN_ALG_WEP)
1184                 encr_mode = NDIS_80211_ENCR_WEP_ENABLED;
1185         else if (groupwise & RNDIS_WLAN_ALG_CCMP)
1186                 encr_mode = NDIS_80211_ENCR_CCMP_ENABLED;
1187         else if (groupwise & RNDIS_WLAN_ALG_TKIP)
1188                 encr_mode = NDIS_80211_ENCR_TKIP_ENABLED;
1189         else
1190                 encr_mode = NDIS_80211_ENCR_DISABLED;
1191 
1192         tmp = cpu_to_le32(encr_mode);
1193         ret = rndis_set_oid(usbdev,
1194                         RNDIS_OID_802_11_ENCRYPTION_STATUS, &tmp,
1195                         sizeof(tmp));
1196         if (ret != 0) {
1197                 netdev_warn(usbdev->net, "setting encr mode failed (%08X)\n",
1198                             ret);
1199                 return ret;
1200         }
1201 
1202         return 0;
1203 }
1204 
1205 static int set_infra_mode(struct usbnet *usbdev, int mode)
1206 {
1207         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1208         __le32 tmp;
1209         int ret;
1210 
1211         netdev_dbg(usbdev->net, "%s(): infra_mode=0x%x\n",
1212                    __func__, priv->infra_mode);
1213 
1214         tmp = cpu_to_le32(mode);
1215         ret = rndis_set_oid(usbdev,
1216                             RNDIS_OID_802_11_INFRASTRUCTURE_MODE,
1217                             &tmp, sizeof(tmp));
1218         if (ret != 0) {
1219                 netdev_warn(usbdev->net, "setting infra mode failed (%08X)\n",
1220                             ret);
1221                 return ret;
1222         }
1223 
1224         /* NDIS drivers clear keys when infrastructure mode is
1225          * changed. But Linux tools assume otherwise. So set the
1226          * keys */
1227         restore_keys(usbdev);
1228 
1229         priv->infra_mode = mode;
1230         return 0;
1231 }
1232 
1233 static int set_rts_threshold(struct usbnet *usbdev, u32 rts_threshold)
1234 {
1235         __le32 tmp;
1236 
1237         netdev_dbg(usbdev->net, "%s(): %i\n", __func__, rts_threshold);
1238 
1239         if (rts_threshold < 0 || rts_threshold > 2347)
1240                 rts_threshold = 2347;
1241 
1242         tmp = cpu_to_le32(rts_threshold);
1243         return rndis_set_oid(usbdev,
1244                              RNDIS_OID_802_11_RTS_THRESHOLD,
1245                              &tmp, sizeof(tmp));
1246 }
1247 
1248 static int set_frag_threshold(struct usbnet *usbdev, u32 frag_threshold)
1249 {
1250         __le32 tmp;
1251 
1252         netdev_dbg(usbdev->net, "%s(): %i\n", __func__, frag_threshold);
1253 
1254         if (frag_threshold < 256 || frag_threshold > 2346)
1255                 frag_threshold = 2346;
1256 
1257         tmp = cpu_to_le32(frag_threshold);
1258         return rndis_set_oid(usbdev,
1259                         RNDIS_OID_802_11_FRAGMENTATION_THRESHOLD,
1260                         &tmp, sizeof(tmp));
1261 }
1262 
1263 static void set_default_iw_params(struct usbnet *usbdev)
1264 {
1265         set_infra_mode(usbdev, NDIS_80211_INFRA_INFRA);
1266         set_auth_mode(usbdev, 0, NL80211_AUTHTYPE_OPEN_SYSTEM,
1267                                                 RNDIS_WLAN_KEY_MGMT_NONE);
1268         set_priv_filter(usbdev);
1269         set_encr_mode(usbdev, RNDIS_WLAN_ALG_NONE, RNDIS_WLAN_ALG_NONE);
1270 }
1271 
1272 static int deauthenticate(struct usbnet *usbdev)
1273 {
1274         int ret;
1275 
1276         ret = disassociate(usbdev, true);
1277         set_default_iw_params(usbdev);
1278         return ret;
1279 }
1280 
1281 static int set_channel(struct usbnet *usbdev, int channel)
1282 {
1283         struct ndis_80211_conf config;
1284         unsigned int dsconfig;
1285         int len, ret;
1286 
1287         netdev_dbg(usbdev->net, "%s(%d)\n", __func__, channel);
1288 
1289         /* this OID is valid only when not associated */
1290         if (is_associated(usbdev))
1291                 return 0;
1292 
1293         dsconfig = 1000 *
1294                 ieee80211_channel_to_frequency(channel, IEEE80211_BAND_2GHZ);
1295 
1296         len = sizeof(config);
1297         ret = rndis_query_oid(usbdev,
1298                         RNDIS_OID_802_11_CONFIGURATION,
1299                         &config, &len);
1300         if (ret < 0) {
1301                 netdev_dbg(usbdev->net, "%s(): querying configuration failed\n",
1302                            __func__);
1303                 return ret;
1304         }
1305 
1306         config.ds_config = cpu_to_le32(dsconfig);
1307         ret = rndis_set_oid(usbdev,
1308                         RNDIS_OID_802_11_CONFIGURATION,
1309                         &config, sizeof(config));
1310 
1311         netdev_dbg(usbdev->net, "%s(): %d -> %d\n", __func__, channel, ret);
1312 
1313         return ret;
1314 }
1315 
1316 static struct ieee80211_channel *get_current_channel(struct usbnet *usbdev,
1317                                                      u32 *beacon_period)
1318 {
1319         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1320         struct ieee80211_channel *channel;
1321         struct ndis_80211_conf config;
1322         int len, ret;
1323 
1324         /* Get channel and beacon interval */
1325         len = sizeof(config);
1326         ret = rndis_query_oid(usbdev,
1327                         RNDIS_OID_802_11_CONFIGURATION,
1328                         &config, &len);
1329         netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_CONFIGURATION -> %d\n",
1330                                 __func__, ret);
1331         if (ret < 0)
1332                 return NULL;
1333 
1334         channel = ieee80211_get_channel(priv->wdev.wiphy,
1335                                 KHZ_TO_MHZ(le32_to_cpu(config.ds_config)));
1336         if (!channel)
1337                 return NULL;
1338 
1339         if (beacon_period)
1340                 *beacon_period = le32_to_cpu(config.beacon_period);
1341         return channel;
1342 }
1343 
1344 /* index must be 0 - N, as per NDIS  */
1345 static int add_wep_key(struct usbnet *usbdev, const u8 *key, int key_len,
1346                                                                 u8 index)
1347 {
1348         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1349         struct ndis_80211_wep_key ndis_key;
1350         u32 cipher;
1351         int ret;
1352 
1353         netdev_dbg(usbdev->net, "%s(idx: %d, len: %d)\n",
1354                    __func__, index, key_len);
1355 
1356         if (index >= RNDIS_WLAN_NUM_KEYS)
1357                 return -EINVAL;
1358 
1359         if (key_len == 5)
1360                 cipher = WLAN_CIPHER_SUITE_WEP40;
1361         else if (key_len == 13)
1362                 cipher = WLAN_CIPHER_SUITE_WEP104;
1363         else
1364                 return -EINVAL;
1365 
1366         memset(&ndis_key, 0, sizeof(ndis_key));
1367 
1368         ndis_key.size = cpu_to_le32(sizeof(ndis_key));
1369         ndis_key.length = cpu_to_le32(key_len);
1370         ndis_key.index = cpu_to_le32(index);
1371         memcpy(&ndis_key.material, key, key_len);
1372 
1373         if (index == priv->encr_tx_key_index) {
1374                 ndis_key.index |= NDIS_80211_ADDWEP_TRANSMIT_KEY;
1375                 ret = set_encr_mode(usbdev, RNDIS_WLAN_ALG_WEP,
1376                                                         RNDIS_WLAN_ALG_NONE);
1377                 if (ret)
1378                         netdev_warn(usbdev->net, "encryption couldn't be enabled (%08X)\n",
1379                                     ret);
1380         }
1381 
1382         ret = rndis_set_oid(usbdev,
1383                         RNDIS_OID_802_11_ADD_WEP, &ndis_key,
1384                         sizeof(ndis_key));
1385         if (ret != 0) {
1386                 netdev_warn(usbdev->net, "adding encryption key %d failed (%08X)\n",
1387                             index + 1, ret);
1388                 return ret;
1389         }
1390 
1391         priv->encr_keys[index].len = key_len;
1392         priv->encr_keys[index].cipher = cipher;
1393         memcpy(&priv->encr_keys[index].material, key, key_len);
1394         memset(&priv->encr_keys[index].bssid, 0xff, ETH_ALEN);
1395 
1396         return 0;
1397 }
1398 
1399 static int add_wpa_key(struct usbnet *usbdev, const u8 *key, int key_len,
1400                         u8 index, const u8 *addr, const u8 *rx_seq,
1401                         int seq_len, u32 cipher, __le32 flags)
1402 {
1403         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1404         struct ndis_80211_key ndis_key;
1405         bool is_addr_ok;
1406         int ret;
1407 
1408         if (index >= RNDIS_WLAN_NUM_KEYS) {
1409                 netdev_dbg(usbdev->net, "%s(): index out of range (%i)\n",
1410                            __func__, index);
1411                 return -EINVAL;
1412         }
1413         if (key_len > sizeof(ndis_key.material) || key_len < 0) {
1414                 netdev_dbg(usbdev->net, "%s(): key length out of range (%i)\n",
1415                            __func__, key_len);
1416                 return -EINVAL;
1417         }
1418         if (flags & NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ) {
1419                 if (!rx_seq || seq_len <= 0) {
1420                         netdev_dbg(usbdev->net, "%s(): recv seq flag without buffer\n",
1421                                    __func__);
1422                         return -EINVAL;
1423                 }
1424                 if (rx_seq && seq_len > sizeof(ndis_key.rsc)) {
1425                         netdev_dbg(usbdev->net, "%s(): too big recv seq buffer\n", __func__);
1426                         return -EINVAL;
1427                 }
1428         }
1429 
1430         is_addr_ok = addr && !is_zero_ether_addr(addr) &&
1431                                         !is_broadcast_ether_addr(addr);
1432         if ((flags & NDIS_80211_ADDKEY_PAIRWISE_KEY) && !is_addr_ok) {
1433                 netdev_dbg(usbdev->net, "%s(): pairwise but bssid invalid (%pM)\n",
1434                            __func__, addr);
1435                 return -EINVAL;
1436         }
1437 
1438         netdev_dbg(usbdev->net, "%s(%i): flags:%i%i%i\n",
1439                    __func__, index,
1440                    !!(flags & NDIS_80211_ADDKEY_TRANSMIT_KEY),
1441                    !!(flags & NDIS_80211_ADDKEY_PAIRWISE_KEY),
1442                    !!(flags & NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ));
1443 
1444         memset(&ndis_key, 0, sizeof(ndis_key));
1445 
1446         ndis_key.size = cpu_to_le32(sizeof(ndis_key) -
1447                                 sizeof(ndis_key.material) + key_len);
1448         ndis_key.length = cpu_to_le32(key_len);
1449         ndis_key.index = cpu_to_le32(index) | flags;
1450 
1451         if (cipher == WLAN_CIPHER_SUITE_TKIP && key_len == 32) {
1452                 /* wpa_supplicant gives us the Michael MIC RX/TX keys in
1453                  * different order than NDIS spec, so swap the order here. */
1454                 memcpy(ndis_key.material, key, 16);
1455                 memcpy(ndis_key.material + 16, key + 24, 8);
1456                 memcpy(ndis_key.material + 24, key + 16, 8);
1457         } else
1458                 memcpy(ndis_key.material, key, key_len);
1459 
1460         if (flags & NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ)
1461                 memcpy(ndis_key.rsc, rx_seq, seq_len);
1462 
1463         if (flags & NDIS_80211_ADDKEY_PAIRWISE_KEY) {
1464                 /* pairwise key */
1465                 memcpy(ndis_key.bssid, addr, ETH_ALEN);
1466         } else {
1467                 /* group key */
1468                 if (priv->infra_mode == NDIS_80211_INFRA_ADHOC)
1469                         memset(ndis_key.bssid, 0xff, ETH_ALEN);
1470                 else
1471                         get_bssid(usbdev, ndis_key.bssid);
1472         }
1473 
1474         ret = rndis_set_oid(usbdev,
1475                         RNDIS_OID_802_11_ADD_KEY, &ndis_key,
1476                         le32_to_cpu(ndis_key.size));
1477         netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_ADD_KEY -> %08X\n",
1478                    __func__, ret);
1479         if (ret != 0)
1480                 return ret;
1481 
1482         memset(&priv->encr_keys[index], 0, sizeof(priv->encr_keys[index]));
1483         priv->encr_keys[index].len = key_len;
1484         priv->encr_keys[index].cipher = cipher;
1485         memcpy(&priv->encr_keys[index].material, key, key_len);
1486         if (flags & NDIS_80211_ADDKEY_PAIRWISE_KEY)
1487                 memcpy(&priv->encr_keys[index].bssid, ndis_key.bssid, ETH_ALEN);
1488         else
1489                 memset(&priv->encr_keys[index].bssid, 0xff, ETH_ALEN);
1490 
1491         if (flags & NDIS_80211_ADDKEY_TRANSMIT_KEY)
1492                 priv->encr_tx_key_index = index;
1493 
1494         return 0;
1495 }
1496 
1497 static int restore_key(struct usbnet *usbdev, u8 key_idx)
1498 {
1499         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1500         struct rndis_wlan_encr_key key;
1501 
1502         if (is_wpa_key(priv, key_idx))
1503                 return 0;
1504 
1505         key = priv->encr_keys[key_idx];
1506 
1507         netdev_dbg(usbdev->net, "%s(): %i:%i\n", __func__, key_idx, key.len);
1508 
1509         if (key.len == 0)
1510                 return 0;
1511 
1512         return add_wep_key(usbdev, key.material, key.len, key_idx);
1513 }
1514 
1515 static void restore_keys(struct usbnet *usbdev)
1516 {
1517         int i;
1518 
1519         for (i = 0; i < 4; i++)
1520                 restore_key(usbdev, i);
1521 }
1522 
1523 static void clear_key(struct rndis_wlan_private *priv, u8 idx)
1524 {
1525         memset(&priv->encr_keys[idx], 0, sizeof(priv->encr_keys[idx]));
1526 }
1527 
1528 /* remove_key is for both wep and wpa */
1529 static int remove_key(struct usbnet *usbdev, u8 index, const u8 *bssid)
1530 {
1531         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1532         struct ndis_80211_remove_key remove_key;
1533         __le32 keyindex;
1534         bool is_wpa;
1535         int ret;
1536 
1537         if (index >= RNDIS_WLAN_NUM_KEYS)
1538                 return -ENOENT;
1539 
1540         if (priv->encr_keys[index].len == 0)
1541                 return 0;
1542 
1543         is_wpa = is_wpa_key(priv, index);
1544 
1545         netdev_dbg(usbdev->net, "%s(): %i:%s:%i\n",
1546                    __func__, index, is_wpa ? "wpa" : "wep",
1547                    priv->encr_keys[index].len);
1548 
1549         clear_key(priv, index);
1550 
1551         if (is_wpa) {
1552                 remove_key.size = cpu_to_le32(sizeof(remove_key));
1553                 remove_key.index = cpu_to_le32(index);
1554                 if (bssid) {
1555                         /* pairwise key */
1556                         if (!is_broadcast_ether_addr(bssid))
1557                                 remove_key.index |=
1558                                         NDIS_80211_ADDKEY_PAIRWISE_KEY;
1559                         memcpy(remove_key.bssid, bssid,
1560                                         sizeof(remove_key.bssid));
1561                 } else
1562                         memset(remove_key.bssid, 0xff,
1563                                                 sizeof(remove_key.bssid));
1564 
1565                 ret = rndis_set_oid(usbdev,
1566                                 RNDIS_OID_802_11_REMOVE_KEY,
1567                                 &remove_key, sizeof(remove_key));
1568                 if (ret != 0)
1569                         return ret;
1570         } else {
1571                 keyindex = cpu_to_le32(index);
1572                 ret = rndis_set_oid(usbdev,
1573                                 RNDIS_OID_802_11_REMOVE_WEP,
1574                                 &keyindex, sizeof(keyindex));
1575                 if (ret != 0) {
1576                         netdev_warn(usbdev->net,
1577                                     "removing encryption key %d failed (%08X)\n",
1578                                     index, ret);
1579                         return ret;
1580                 }
1581         }
1582 
1583         /* if it is transmit key, disable encryption */
1584         if (index == priv->encr_tx_key_index)
1585                 set_encr_mode(usbdev, RNDIS_WLAN_ALG_NONE, RNDIS_WLAN_ALG_NONE);
1586 
1587         return 0;
1588 }
1589 
1590 static void set_multicast_list(struct usbnet *usbdev)
1591 {
1592         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1593         struct netdev_hw_addr *ha;
1594         __le32 filter, basefilter;
1595         int ret;
1596         char *mc_addrs = NULL;
1597         int mc_count;
1598 
1599         basefilter = filter = cpu_to_le32(RNDIS_PACKET_TYPE_DIRECTED |
1600                                           RNDIS_PACKET_TYPE_BROADCAST);
1601 
1602         if (usbdev->net->flags & IFF_PROMISC) {
1603                 filter |= cpu_to_le32(RNDIS_PACKET_TYPE_PROMISCUOUS |
1604                                       RNDIS_PACKET_TYPE_ALL_LOCAL);
1605         } else if (usbdev->net->flags & IFF_ALLMULTI) {
1606                 filter |= cpu_to_le32(RNDIS_PACKET_TYPE_ALL_MULTICAST);
1607         }
1608 
1609         if (filter != basefilter)
1610                 goto set_filter;
1611 
1612         /*
1613          * mc_list should be accessed holding the lock, so copy addresses to
1614          * local buffer first.
1615          */
1616         netif_addr_lock_bh(usbdev->net);
1617         mc_count = netdev_mc_count(usbdev->net);
1618         if (mc_count > priv->multicast_size) {
1619                 filter |= cpu_to_le32(RNDIS_PACKET_TYPE_ALL_MULTICAST);
1620         } else if (mc_count) {
1621                 int i = 0;
1622 
1623                 mc_addrs = kmalloc_array(mc_count, ETH_ALEN, GFP_ATOMIC);
1624                 if (!mc_addrs) {
1625                         netif_addr_unlock_bh(usbdev->net);
1626                         return;
1627                 }
1628 
1629                 netdev_for_each_mc_addr(ha, usbdev->net)
1630                         memcpy(mc_addrs + i++ * ETH_ALEN,
1631                                ha->addr, ETH_ALEN);
1632         }
1633         netif_addr_unlock_bh(usbdev->net);
1634 
1635         if (filter != basefilter)
1636                 goto set_filter;
1637 
1638         if (mc_count) {
1639                 ret = rndis_set_oid(usbdev,
1640                                 RNDIS_OID_802_3_MULTICAST_LIST,
1641                                 mc_addrs, mc_count * ETH_ALEN);
1642                 kfree(mc_addrs);
1643                 if (ret == 0)
1644                         filter |= cpu_to_le32(RNDIS_PACKET_TYPE_MULTICAST);
1645                 else
1646                         filter |= cpu_to_le32(RNDIS_PACKET_TYPE_ALL_MULTICAST);
1647 
1648                 netdev_dbg(usbdev->net, "RNDIS_OID_802_3_MULTICAST_LIST(%d, max: %d) -> %d\n",
1649                            mc_count, priv->multicast_size, ret);
1650         }
1651 
1652 set_filter:
1653         ret = rndis_set_oid(usbdev, RNDIS_OID_GEN_CURRENT_PACKET_FILTER, &filter,
1654                                                         sizeof(filter));
1655         if (ret < 0) {
1656                 netdev_warn(usbdev->net, "couldn't set packet filter: %08x\n",
1657                             le32_to_cpu(filter));
1658         }
1659 
1660         netdev_dbg(usbdev->net, "RNDIS_OID_GEN_CURRENT_PACKET_FILTER(%08x) -> %d\n",
1661                    le32_to_cpu(filter), ret);
1662 }
1663 
1664 #ifdef DEBUG
1665 static void debug_print_pmkids(struct usbnet *usbdev,
1666                                 struct ndis_80211_pmkid *pmkids,
1667                                 const char *func_str)
1668 {
1669         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1670         int i, len, count, max_pmkids, entry_len;
1671 
1672         max_pmkids = priv->wdev.wiphy->max_num_pmkids;
1673         len = le32_to_cpu(pmkids->length);
1674         count = le32_to_cpu(pmkids->bssid_info_count);
1675 
1676         entry_len = (count > 0) ? (len - sizeof(*pmkids)) / count : -1;
1677 
1678         netdev_dbg(usbdev->net, "%s(): %d PMKIDs (data len: %d, entry len: "
1679                                 "%d)\n", func_str, count, len, entry_len);
1680 
1681         if (count > max_pmkids)
1682                 count = max_pmkids;
1683 
1684         for (i = 0; i < count; i++) {
1685                 u32 *tmp = (u32 *)pmkids->bssid_info[i].pmkid;
1686 
1687                 netdev_dbg(usbdev->net, "%s():  bssid: %pM, "
1688                                 "pmkid: %08X:%08X:%08X:%08X\n",
1689                                 func_str, pmkids->bssid_info[i].bssid,
1690                                 cpu_to_be32(tmp[0]), cpu_to_be32(tmp[1]),
1691                                 cpu_to_be32(tmp[2]), cpu_to_be32(tmp[3]));
1692         }
1693 }
1694 #else
1695 static void debug_print_pmkids(struct usbnet *usbdev,
1696                                 struct ndis_80211_pmkid *pmkids,
1697                                 const char *func_str)
1698 {
1699         return;
1700 }
1701 #endif
1702 
1703 static struct ndis_80211_pmkid *get_device_pmkids(struct usbnet *usbdev)
1704 {
1705         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1706         struct ndis_80211_pmkid *pmkids;
1707         int len, ret, max_pmkids;
1708 
1709         max_pmkids = priv->wdev.wiphy->max_num_pmkids;
1710         len = sizeof(*pmkids) + max_pmkids * sizeof(pmkids->bssid_info[0]);
1711 
1712         pmkids = kzalloc(len, GFP_KERNEL);
1713         if (!pmkids)
1714                 return ERR_PTR(-ENOMEM);
1715 
1716         pmkids->length = cpu_to_le32(len);
1717         pmkids->bssid_info_count = cpu_to_le32(max_pmkids);
1718 
1719         ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_PMKID,
1720                         pmkids, &len);
1721         if (ret < 0) {
1722                 netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_PMKID(%d, %d)"
1723                                 " -> %d\n", __func__, len, max_pmkids, ret);
1724 
1725                 kfree(pmkids);
1726                 return ERR_PTR(ret);
1727         }
1728 
1729         if (le32_to_cpu(pmkids->bssid_info_count) > max_pmkids)
1730                 pmkids->bssid_info_count = cpu_to_le32(max_pmkids);
1731 
1732         debug_print_pmkids(usbdev, pmkids, __func__);
1733 
1734         return pmkids;
1735 }
1736 
1737 static int set_device_pmkids(struct usbnet *usbdev,
1738                                 struct ndis_80211_pmkid *pmkids)
1739 {
1740         int ret, len, num_pmkids;
1741 
1742         num_pmkids = le32_to_cpu(pmkids->bssid_info_count);
1743         len = sizeof(*pmkids) + num_pmkids * sizeof(pmkids->bssid_info[0]);
1744         pmkids->length = cpu_to_le32(len);
1745 
1746         debug_print_pmkids(usbdev, pmkids, __func__);
1747 
1748         ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_PMKID, pmkids,
1749                             le32_to_cpu(pmkids->length));
1750         if (ret < 0) {
1751                 netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_PMKID(%d, %d) -> %d"
1752                                 "\n", __func__, len, num_pmkids, ret);
1753         }
1754 
1755         kfree(pmkids);
1756         return ret;
1757 }
1758 
1759 static struct ndis_80211_pmkid *remove_pmkid(struct usbnet *usbdev,
1760                                                 struct ndis_80211_pmkid *pmkids,
1761                                                 struct cfg80211_pmksa *pmksa,
1762                                                 int max_pmkids)
1763 {
1764         int i, newlen, err;
1765         unsigned int count;
1766 
1767         count = le32_to_cpu(pmkids->bssid_info_count);
1768 
1769         if (count > max_pmkids)
1770                 count = max_pmkids;
1771 
1772         for (i = 0; i < count; i++)
1773                 if (ether_addr_equal(pmkids->bssid_info[i].bssid,
1774                                      pmksa->bssid))
1775                         break;
1776 
1777         /* pmkid not found */
1778         if (i == count) {
1779                 netdev_dbg(usbdev->net, "%s(): bssid not found (%pM)\n",
1780                                         __func__, pmksa->bssid);
1781                 err = -ENOENT;
1782                 goto error;
1783         }
1784 
1785         for (; i + 1 < count; i++)
1786                 pmkids->bssid_info[i] = pmkids->bssid_info[i + 1];
1787 
1788         count--;
1789         newlen = sizeof(*pmkids) + count * sizeof(pmkids->bssid_info[0]);
1790 
1791         pmkids->length = cpu_to_le32(newlen);
1792         pmkids->bssid_info_count = cpu_to_le32(count);
1793 
1794         return pmkids;
1795 error:
1796         kfree(pmkids);
1797         return ERR_PTR(err);
1798 }
1799 
1800 static struct ndis_80211_pmkid *update_pmkid(struct usbnet *usbdev,
1801                                                 struct ndis_80211_pmkid *pmkids,
1802                                                 struct cfg80211_pmksa *pmksa,
1803                                                 int max_pmkids)
1804 {
1805         struct ndis_80211_pmkid *new_pmkids;
1806         int i, err, newlen;
1807         unsigned int count;
1808 
1809         count = le32_to_cpu(pmkids->bssid_info_count);
1810 
1811         if (count > max_pmkids)
1812                 count = max_pmkids;
1813 
1814         /* update with new pmkid */
1815         for (i = 0; i < count; i++) {
1816                 if (!ether_addr_equal(pmkids->bssid_info[i].bssid,
1817                                       pmksa->bssid))
1818                         continue;
1819 
1820                 memcpy(pmkids->bssid_info[i].pmkid, pmksa->pmkid,
1821                                                                 WLAN_PMKID_LEN);
1822 
1823                 return pmkids;
1824         }
1825 
1826         /* out of space, return error */
1827         if (i == max_pmkids) {
1828                 netdev_dbg(usbdev->net, "%s(): out of space\n", __func__);
1829                 err = -ENOSPC;
1830                 goto error;
1831         }
1832 
1833         /* add new pmkid */
1834         newlen = sizeof(*pmkids) + (count + 1) * sizeof(pmkids->bssid_info[0]);
1835 
1836         new_pmkids = krealloc(pmkids, newlen, GFP_KERNEL);
1837         if (!new_pmkids) {
1838                 err = -ENOMEM;
1839                 goto error;
1840         }
1841         pmkids = new_pmkids;
1842 
1843         pmkids->length = cpu_to_le32(newlen);
1844         pmkids->bssid_info_count = cpu_to_le32(count + 1);
1845 
1846         memcpy(pmkids->bssid_info[count].bssid, pmksa->bssid, ETH_ALEN);
1847         memcpy(pmkids->bssid_info[count].pmkid, pmksa->pmkid, WLAN_PMKID_LEN);
1848 
1849         return pmkids;
1850 error:
1851         kfree(pmkids);
1852         return ERR_PTR(err);
1853 }
1854 
1855 /*
1856  * cfg80211 ops
1857  */
1858 static int rndis_change_virtual_intf(struct wiphy *wiphy,
1859                                         struct net_device *dev,
1860                                         enum nl80211_iftype type, u32 *flags,
1861                                         struct vif_params *params)
1862 {
1863         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1864         struct usbnet *usbdev = priv->usbdev;
1865         int mode;
1866 
1867         switch (type) {
1868         case NL80211_IFTYPE_ADHOC:
1869                 mode = NDIS_80211_INFRA_ADHOC;
1870                 break;
1871         case NL80211_IFTYPE_STATION:
1872                 mode = NDIS_80211_INFRA_INFRA;
1873                 break;
1874         default:
1875                 return -EINVAL;
1876         }
1877 
1878         priv->wdev.iftype = type;
1879 
1880         return set_infra_mode(usbdev, mode);
1881 }
1882 
1883 static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed)
1884 {
1885         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1886         struct usbnet *usbdev = priv->usbdev;
1887         int err;
1888 
1889         if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
1890                 err = set_frag_threshold(usbdev, wiphy->frag_threshold);
1891                 if (err < 0)
1892                         return err;
1893         }
1894 
1895         if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
1896                 err = set_rts_threshold(usbdev, wiphy->rts_threshold);
1897                 if (err < 0)
1898                         return err;
1899         }
1900 
1901         return 0;
1902 }
1903 
1904 static int rndis_set_tx_power(struct wiphy *wiphy,
1905                               struct wireless_dev *wdev,
1906                               enum nl80211_tx_power_setting type,
1907                               int mbm)
1908 {
1909         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1910         struct usbnet *usbdev = priv->usbdev;
1911 
1912         netdev_dbg(usbdev->net, "%s(): type:0x%x mbm:%i\n",
1913                    __func__, type, mbm);
1914 
1915         if (mbm < 0 || (mbm % 100))
1916                 return -ENOTSUPP;
1917 
1918         /* Device doesn't support changing txpower after initialization, only
1919          * turn off/on radio. Support 'auto' mode and setting same dBm that is
1920          * currently used.
1921          */
1922         if (type == NL80211_TX_POWER_AUTOMATIC ||
1923             MBM_TO_DBM(mbm) == get_bcm4320_power_dbm(priv)) {
1924                 if (!priv->radio_on)
1925                         disassociate(usbdev, true); /* turn on radio */
1926 
1927                 return 0;
1928         }
1929 
1930         return -ENOTSUPP;
1931 }
1932 
1933 static int rndis_get_tx_power(struct wiphy *wiphy,
1934                               struct wireless_dev *wdev,
1935                               int *dbm)
1936 {
1937         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1938         struct usbnet *usbdev = priv->usbdev;
1939 
1940         *dbm = get_bcm4320_power_dbm(priv);
1941 
1942         netdev_dbg(usbdev->net, "%s(): dbm:%i\n", __func__, *dbm);
1943 
1944         return 0;
1945 }
1946 
1947 #define SCAN_DELAY_JIFFIES (6 * HZ)
1948 static int rndis_scan(struct wiphy *wiphy,
1949                         struct cfg80211_scan_request *request)
1950 {
1951         struct net_device *dev = request->wdev->netdev;
1952         struct usbnet *usbdev = netdev_priv(dev);
1953         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1954         int ret;
1955         int delay = SCAN_DELAY_JIFFIES;
1956 
1957         netdev_dbg(usbdev->net, "cfg80211.scan\n");
1958 
1959         /* Get current bssid list from device before new scan, as new scan
1960          * clears internal bssid list.
1961          */
1962         rndis_check_bssid_list(usbdev, NULL, NULL);
1963 
1964         if (priv->scan_request && priv->scan_request != request)
1965                 return -EBUSY;
1966 
1967         priv->scan_request = request;
1968 
1969         ret = rndis_start_bssid_list_scan(usbdev);
1970         if (ret == 0) {
1971                 if (priv->device_type == RNDIS_BCM4320A)
1972                         delay = HZ;
1973 
1974                 /* Wait before retrieving scan results from device */
1975                 queue_delayed_work(priv->workqueue, &priv->scan_work, delay);
1976         }
1977 
1978         return ret;
1979 }
1980 
1981 static bool rndis_bss_info_update(struct usbnet *usbdev,
1982                                   struct ndis_80211_bssid_ex *bssid)
1983 {
1984         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1985         struct ieee80211_channel *channel;
1986         struct cfg80211_bss *bss;
1987         s32 signal;
1988         u64 timestamp;
1989         u16 capability;
1990         u16 beacon_interval;
1991         struct ndis_80211_fixed_ies *fixed;
1992         int ie_len, bssid_len;
1993         u8 *ie;
1994 
1995         netdev_dbg(usbdev->net, " found bssid: '%.32s' [%pM], len: %d\n",
1996                    bssid->ssid.essid, bssid->mac, le32_to_cpu(bssid->length));
1997 
1998         /* parse bssid structure */
1999         bssid_len = le32_to_cpu(bssid->length);
2000 
2001         if (bssid_len < sizeof(struct ndis_80211_bssid_ex) +
2002                         sizeof(struct ndis_80211_fixed_ies))
2003                 return NULL;
2004 
2005         fixed = (struct ndis_80211_fixed_ies *)bssid->ies;
2006 
2007         ie = (void *)(bssid->ies + sizeof(struct ndis_80211_fixed_ies));
2008         ie_len = min(bssid_len - (int)sizeof(*bssid),
2009                                         (int)le32_to_cpu(bssid->ie_length));
2010         ie_len -= sizeof(struct ndis_80211_fixed_ies);
2011         if (ie_len < 0)
2012                 return NULL;
2013 
2014         /* extract data for cfg80211_inform_bss */
2015         channel = ieee80211_get_channel(priv->wdev.wiphy,
2016                         KHZ_TO_MHZ(le32_to_cpu(bssid->config.ds_config)));
2017         if (!channel)
2018                 return NULL;
2019 
2020         signal = level_to_qual(le32_to_cpu(bssid->rssi));
2021         timestamp = le64_to_cpu(*(__le64 *)fixed->timestamp);
2022         capability = le16_to_cpu(fixed->capabilities);
2023         beacon_interval = le16_to_cpu(fixed->beacon_interval);
2024 
2025         bss = cfg80211_inform_bss(priv->wdev.wiphy, channel, bssid->mac,
2026                 timestamp, capability, beacon_interval, ie, ie_len, signal,
2027                 GFP_KERNEL);
2028         cfg80211_put_bss(priv->wdev.wiphy, bss);
2029 
2030         return (bss != NULL);
2031 }
2032 
2033 static struct ndis_80211_bssid_ex *next_bssid_list_item(
2034                                         struct ndis_80211_bssid_ex *bssid,
2035                                         int *bssid_len, void *buf, int len)
2036 {
2037         void *buf_end, *bssid_end;
2038 
2039         buf_end = (char *)buf + len;
2040         bssid_end = (char *)bssid + *bssid_len;
2041 
2042         if ((int)(buf_end - bssid_end) < sizeof(bssid->length)) {
2043                 *bssid_len = 0;
2044                 return NULL;
2045         } else {
2046                 bssid = (void *)((char *)bssid + *bssid_len);
2047                 *bssid_len = le32_to_cpu(bssid->length);
2048                 return bssid;
2049         }
2050 }
2051 
2052 static bool check_bssid_list_item(struct ndis_80211_bssid_ex *bssid,
2053                                   int bssid_len, void *buf, int len)
2054 {
2055         void *buf_end, *bssid_end;
2056 
2057         if (!bssid || bssid_len <= 0 || bssid_len > len)
2058                 return false;
2059 
2060         buf_end = (char *)buf + len;
2061         bssid_end = (char *)bssid + bssid_len;
2062 
2063         return (int)(buf_end - bssid_end) >= 0 && (int)(bssid_end - buf) >= 0;
2064 }
2065 
2066 static int rndis_check_bssid_list(struct usbnet *usbdev, u8 *match_bssid,
2067                                         bool *matched)
2068 {
2069         void *buf = NULL;
2070         struct ndis_80211_bssid_list_ex *bssid_list;
2071         struct ndis_80211_bssid_ex *bssid;
2072         int ret = -EINVAL, len, count, bssid_len, real_count, new_len;
2073 
2074         netdev_dbg(usbdev->net, "%s()\n", __func__);
2075 
2076         len = CONTROL_BUFFER_SIZE;
2077 resize_buf:
2078         buf = kzalloc(len, GFP_KERNEL);
2079         if (!buf) {
2080                 ret = -ENOMEM;
2081                 goto out;
2082         }
2083 
2084         /* BSSID-list might have got bigger last time we checked, keep
2085          * resizing until it won't get any bigger.
2086          */
2087         new_len = len;
2088         ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_BSSID_LIST,
2089                               buf, &new_len);
2090         if (ret != 0 || new_len < sizeof(struct ndis_80211_bssid_list_ex))
2091                 goto out;
2092 
2093         if (new_len > len) {
2094                 len = new_len;
2095                 kfree(buf);
2096                 goto resize_buf;
2097         }
2098 
2099         len = new_len;
2100 
2101         bssid_list = buf;
2102         count = le32_to_cpu(bssid_list->num_items);
2103         real_count = 0;
2104         netdev_dbg(usbdev->net, "%s(): buflen: %d\n", __func__, len);
2105 
2106         bssid_len = 0;
2107         bssid = next_bssid_list_item(bssid_list->bssid, &bssid_len, buf, len);
2108 
2109         /* Device returns incorrect 'num_items'. Workaround by ignoring the
2110          * received 'num_items' and walking through full bssid buffer instead.
2111          */
2112         while (check_bssid_list_item(bssid, bssid_len, buf, len)) {
2113                 if (rndis_bss_info_update(usbdev, bssid) && match_bssid &&
2114                     matched) {
2115                         if (ether_addr_equal(bssid->mac, match_bssid))
2116                                 *matched = true;
2117                 }
2118 
2119                 real_count++;
2120                 bssid = next_bssid_list_item(bssid, &bssid_len, buf, len);
2121         }
2122 
2123         netdev_dbg(usbdev->net, "%s(): num_items from device: %d, really found:"
2124                                 " %d\n", __func__, count, real_count);
2125 
2126 out:
2127         kfree(buf);
2128         return ret;
2129 }
2130 
2131 static void rndis_get_scan_results(struct work_struct *work)
2132 {
2133         struct rndis_wlan_private *priv =
2134                 container_of(work, struct rndis_wlan_private, scan_work.work);
2135         struct usbnet *usbdev = priv->usbdev;
2136         int ret;
2137 
2138         netdev_dbg(usbdev->net, "get_scan_results\n");
2139 
2140         if (!priv->scan_request)
2141                 return;
2142 
2143         ret = rndis_check_bssid_list(usbdev, NULL, NULL);
2144 
2145         cfg80211_scan_done(priv->scan_request, ret < 0);
2146 
2147         priv->scan_request = NULL;
2148 }
2149 
2150 static int rndis_connect(struct wiphy *wiphy, struct net_device *dev,
2151                                         struct cfg80211_connect_params *sme)
2152 {
2153         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2154         struct usbnet *usbdev = priv->usbdev;
2155         struct ieee80211_channel *channel = sme->channel;
2156         struct ndis_80211_ssid ssid;
2157         int pairwise = RNDIS_WLAN_ALG_NONE;
2158         int groupwise = RNDIS_WLAN_ALG_NONE;
2159         int keymgmt = RNDIS_WLAN_KEY_MGMT_NONE;
2160         int length, i, ret, chan = -1;
2161 
2162         if (channel)
2163                 chan = ieee80211_frequency_to_channel(channel->center_freq);
2164 
2165         groupwise = rndis_cipher_to_alg(sme->crypto.cipher_group);
2166         for (i = 0; i < sme->crypto.n_ciphers_pairwise; i++)
2167                 pairwise |=
2168                         rndis_cipher_to_alg(sme->crypto.ciphers_pairwise[i]);
2169 
2170         if (sme->crypto.n_ciphers_pairwise > 0 &&
2171                         pairwise == RNDIS_WLAN_ALG_NONE) {
2172                 netdev_err(usbdev->net, "Unsupported pairwise cipher\n");
2173                 return -ENOTSUPP;
2174         }
2175 
2176         for (i = 0; i < sme->crypto.n_akm_suites; i++)
2177                 keymgmt |=
2178                         rndis_akm_suite_to_key_mgmt(sme->crypto.akm_suites[i]);
2179 
2180         if (sme->crypto.n_akm_suites > 0 &&
2181                         keymgmt == RNDIS_WLAN_KEY_MGMT_NONE) {
2182                 netdev_err(usbdev->net, "Invalid keymgmt\n");
2183                 return -ENOTSUPP;
2184         }
2185 
2186         netdev_dbg(usbdev->net, "cfg80211.connect('%.32s':[%pM]:%d:[%d,0x%x:0x%x]:[0x%x:0x%x]:0x%x)\n",
2187                    sme->ssid, sme->bssid, chan,
2188                    sme->privacy, sme->crypto.wpa_versions, sme->auth_type,
2189                    groupwise, pairwise, keymgmt);
2190 
2191         if (is_associated(usbdev))
2192                 disassociate(usbdev, false);
2193 
2194         ret = set_infra_mode(usbdev, NDIS_80211_INFRA_INFRA);
2195         if (ret < 0) {
2196                 netdev_dbg(usbdev->net, "connect: set_infra_mode failed, %d\n",
2197                            ret);
2198                 goto err_turn_radio_on;
2199         }
2200 
2201         ret = set_auth_mode(usbdev, sme->crypto.wpa_versions, sme->auth_type,
2202                                                                 keymgmt);
2203         if (ret < 0) {
2204                 netdev_dbg(usbdev->net, "connect: set_auth_mode failed, %d\n",
2205                            ret);
2206                 goto err_turn_radio_on;
2207         }
2208 
2209         set_priv_filter(usbdev);
2210 
2211         ret = set_encr_mode(usbdev, pairwise, groupwise);
2212         if (ret < 0) {
2213                 netdev_dbg(usbdev->net, "connect: set_encr_mode failed, %d\n",
2214                            ret);
2215                 goto err_turn_radio_on;
2216         }
2217 
2218         if (channel) {
2219                 ret = set_channel(usbdev, chan);
2220                 if (ret < 0) {
2221                         netdev_dbg(usbdev->net, "connect: set_channel failed, %d\n",
2222                                    ret);
2223                         goto err_turn_radio_on;
2224                 }
2225         }
2226 
2227         if (sme->key && ((groupwise | pairwise) & RNDIS_WLAN_ALG_WEP)) {
2228                 priv->encr_tx_key_index = sme->key_idx;
2229                 ret = add_wep_key(usbdev, sme->key, sme->key_len, sme->key_idx);
2230                 if (ret < 0) {
2231                         netdev_dbg(usbdev->net, "connect: add_wep_key failed, %d (%d, %d)\n",
2232                                    ret, sme->key_len, sme->key_idx);
2233                         goto err_turn_radio_on;
2234                 }
2235         }
2236 
2237         if (sme->bssid && !is_zero_ether_addr(sme->bssid) &&
2238                                 !is_broadcast_ether_addr(sme->bssid)) {
2239                 ret = set_bssid(usbdev, sme->bssid);
2240                 if (ret < 0) {
2241                         netdev_dbg(usbdev->net, "connect: set_bssid failed, %d\n",
2242                                    ret);
2243                         goto err_turn_radio_on;
2244                 }
2245         } else
2246                 clear_bssid(usbdev);
2247 
2248         length = sme->ssid_len;
2249         if (length > NDIS_802_11_LENGTH_SSID)
2250                 length = NDIS_802_11_LENGTH_SSID;
2251 
2252         memset(&ssid, 0, sizeof(ssid));
2253         ssid.length = cpu_to_le32(length);
2254         memcpy(ssid.essid, sme->ssid, length);
2255 
2256         /* Pause and purge rx queue, so we don't pass packets before
2257          * 'media connect'-indication.
2258          */
2259         usbnet_pause_rx(usbdev);
2260         usbnet_purge_paused_rxq(usbdev);
2261 
2262         ret = set_essid(usbdev, &ssid);
2263         if (ret < 0)
2264                 netdev_dbg(usbdev->net, "connect: set_essid failed, %d\n", ret);
2265         return ret;
2266 
2267 err_turn_radio_on:
2268         disassociate(usbdev, true);
2269 
2270         return ret;
2271 }
2272 
2273 static int rndis_disconnect(struct wiphy *wiphy, struct net_device *dev,
2274                                                                 u16 reason_code)
2275 {
2276         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2277         struct usbnet *usbdev = priv->usbdev;
2278 
2279         netdev_dbg(usbdev->net, "cfg80211.disconnect(%d)\n", reason_code);
2280 
2281         priv->connected = false;
2282         memset(priv->bssid, 0, ETH_ALEN);
2283 
2284         return deauthenticate(usbdev);
2285 }
2286 
2287 static int rndis_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2288                                         struct cfg80211_ibss_params *params)
2289 {
2290         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2291         struct usbnet *usbdev = priv->usbdev;
2292         struct ieee80211_channel *channel = params->chandef.chan;
2293         struct ndis_80211_ssid ssid;
2294         enum nl80211_auth_type auth_type;
2295         int ret, alg, length, chan = -1;
2296 
2297         if (channel)
2298                 chan = ieee80211_frequency_to_channel(channel->center_freq);
2299 
2300         /* TODO: How to handle ad-hoc encryption?
2301          * connect() has *key, join_ibss() doesn't. RNDIS requires key to be
2302          * pre-shared for encryption (open/shared/wpa), is key set before
2303          * join_ibss? Which auth_type to use (not in params)? What about WPA?
2304          */
2305         if (params->privacy) {
2306                 auth_type = NL80211_AUTHTYPE_SHARED_KEY;
2307                 alg = RNDIS_WLAN_ALG_WEP;
2308         } else {
2309                 auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2310                 alg = RNDIS_WLAN_ALG_NONE;
2311         }
2312 
2313         netdev_dbg(usbdev->net, "cfg80211.join_ibss('%.32s':[%pM]:%d:%d)\n",
2314                    params->ssid, params->bssid, chan, params->privacy);
2315 
2316         if (is_associated(usbdev))
2317                 disassociate(usbdev, false);
2318 
2319         ret = set_infra_mode(usbdev, NDIS_80211_INFRA_ADHOC);
2320         if (ret < 0) {
2321                 netdev_dbg(usbdev->net, "join_ibss: set_infra_mode failed, %d\n",
2322                            ret);
2323                 goto err_turn_radio_on;
2324         }
2325 
2326         ret = set_auth_mode(usbdev, 0, auth_type, RNDIS_WLAN_KEY_MGMT_NONE);
2327         if (ret < 0) {
2328                 netdev_dbg(usbdev->net, "join_ibss: set_auth_mode failed, %d\n",
2329                            ret);
2330                 goto err_turn_radio_on;
2331         }
2332 
2333         set_priv_filter(usbdev);
2334 
2335         ret = set_encr_mode(usbdev, alg, RNDIS_WLAN_ALG_NONE);
2336         if (ret < 0) {
2337                 netdev_dbg(usbdev->net, "join_ibss: set_encr_mode failed, %d\n",
2338                            ret);
2339                 goto err_turn_radio_on;
2340         }
2341 
2342         if (channel) {
2343                 ret = set_channel(usbdev, chan);
2344                 if (ret < 0) {
2345                         netdev_dbg(usbdev->net, "join_ibss: set_channel failed, %d\n",
2346                                    ret);
2347                         goto err_turn_radio_on;
2348                 }
2349         }
2350 
2351         if (params->bssid && !is_zero_ether_addr(params->bssid) &&
2352                                 !is_broadcast_ether_addr(params->bssid)) {
2353                 ret = set_bssid(usbdev, params->bssid);
2354                 if (ret < 0) {
2355                         netdev_dbg(usbdev->net, "join_ibss: set_bssid failed, %d\n",
2356                                    ret);
2357                         goto err_turn_radio_on;
2358                 }
2359         } else
2360                 clear_bssid(usbdev);
2361 
2362         length = params->ssid_len;
2363         if (length > NDIS_802_11_LENGTH_SSID)
2364                 length = NDIS_802_11_LENGTH_SSID;
2365 
2366         memset(&ssid, 0, sizeof(ssid));
2367         ssid.length = cpu_to_le32(length);
2368         memcpy(ssid.essid, params->ssid, length);
2369 
2370         /* Don't need to pause rx queue for ad-hoc. */
2371         usbnet_purge_paused_rxq(usbdev);
2372         usbnet_resume_rx(usbdev);
2373 
2374         ret = set_essid(usbdev, &ssid);
2375         if (ret < 0)
2376                 netdev_dbg(usbdev->net, "join_ibss: set_essid failed, %d\n",
2377                            ret);
2378         return ret;
2379 
2380 err_turn_radio_on:
2381         disassociate(usbdev, true);
2382 
2383         return ret;
2384 }
2385 
2386 static int rndis_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2387 {
2388         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2389         struct usbnet *usbdev = priv->usbdev;
2390 
2391         netdev_dbg(usbdev->net, "cfg80211.leave_ibss()\n");
2392 
2393         priv->connected = false;
2394         memset(priv->bssid, 0, ETH_ALEN);
2395 
2396         return deauthenticate(usbdev);
2397 }
2398 
2399 static int rndis_add_key(struct wiphy *wiphy, struct net_device *netdev,
2400                          u8 key_index, bool pairwise, const u8 *mac_addr,
2401                          struct key_params *params)
2402 {
2403         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2404         struct usbnet *usbdev = priv->usbdev;
2405         __le32 flags;
2406 
2407         netdev_dbg(usbdev->net, "%s(%i, %pM, %08x)\n",
2408                    __func__, key_index, mac_addr, params->cipher);
2409 
2410         switch (params->cipher) {
2411         case WLAN_CIPHER_SUITE_WEP40:
2412         case WLAN_CIPHER_SUITE_WEP104:
2413                 return add_wep_key(usbdev, params->key, params->key_len,
2414                                                                 key_index);
2415         case WLAN_CIPHER_SUITE_TKIP:
2416         case WLAN_CIPHER_SUITE_CCMP:
2417                 flags = 0;
2418 
2419                 if (params->seq && params->seq_len > 0)
2420                         flags |= NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ;
2421                 if (mac_addr)
2422                         flags |= NDIS_80211_ADDKEY_PAIRWISE_KEY |
2423                                         NDIS_80211_ADDKEY_TRANSMIT_KEY;
2424 
2425                 return add_wpa_key(usbdev, params->key, params->key_len,
2426                                 key_index, mac_addr, params->seq,
2427                                 params->seq_len, params->cipher, flags);
2428         default:
2429                 netdev_dbg(usbdev->net, "%s(): unsupported cipher %08x\n",
2430                            __func__, params->cipher);
2431                 return -ENOTSUPP;
2432         }
2433 }
2434 
2435 static int rndis_del_key(struct wiphy *wiphy, struct net_device *netdev,
2436                          u8 key_index, bool pairwise, const u8 *mac_addr)
2437 {
2438         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2439         struct usbnet *usbdev = priv->usbdev;
2440 
2441         netdev_dbg(usbdev->net, "%s(%i, %pM)\n", __func__, key_index, mac_addr);
2442 
2443         return remove_key(usbdev, key_index, mac_addr);
2444 }
2445 
2446 static int rndis_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
2447                                  u8 key_index, bool unicast, bool multicast)
2448 {
2449         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2450         struct usbnet *usbdev = priv->usbdev;
2451         struct rndis_wlan_encr_key key;
2452 
2453         netdev_dbg(usbdev->net, "%s(%i)\n", __func__, key_index);
2454 
2455         if (key_index >= RNDIS_WLAN_NUM_KEYS)
2456                 return -ENOENT;
2457 
2458         priv->encr_tx_key_index = key_index;
2459 
2460         if (is_wpa_key(priv, key_index))
2461                 return 0;
2462 
2463         key = priv->encr_keys[key_index];
2464 
2465         return add_wep_key(usbdev, key.material, key.len, key_index);
2466 }
2467 
2468 static void rndis_fill_station_info(struct usbnet *usbdev,
2469                                                 struct station_info *sinfo)
2470 {
2471         __le32 linkspeed, rssi;
2472         int ret, len;
2473 
2474         memset(sinfo, 0, sizeof(*sinfo));
2475 
2476         len = sizeof(linkspeed);
2477         ret = rndis_query_oid(usbdev, RNDIS_OID_GEN_LINK_SPEED, &linkspeed, &len);
2478         if (ret == 0) {
2479                 sinfo->txrate.legacy = le32_to_cpu(linkspeed) / 1000;
2480                 sinfo->filled |= STATION_INFO_TX_BITRATE;
2481         }
2482 
2483         len = sizeof(rssi);
2484         ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_RSSI,
2485                               &rssi, &len);
2486         if (ret == 0) {
2487                 sinfo->signal = level_to_qual(le32_to_cpu(rssi));
2488                 sinfo->filled |= STATION_INFO_SIGNAL;
2489         }
2490 }
2491 
2492 static int rndis_get_station(struct wiphy *wiphy, struct net_device *dev,
2493                              const u8 *mac, struct station_info *sinfo)
2494 {
2495         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2496         struct usbnet *usbdev = priv->usbdev;
2497 
2498         if (!ether_addr_equal(priv->bssid, mac))
2499                 return -ENOENT;
2500 
2501         rndis_fill_station_info(usbdev, sinfo);
2502 
2503         return 0;
2504 }
2505 
2506 static int rndis_dump_station(struct wiphy *wiphy, struct net_device *dev,
2507                                int idx, u8 *mac, struct station_info *sinfo)
2508 {
2509         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2510         struct usbnet *usbdev = priv->usbdev;
2511 
2512         if (idx != 0)
2513                 return -ENOENT;
2514 
2515         memcpy(mac, priv->bssid, ETH_ALEN);
2516 
2517         rndis_fill_station_info(usbdev, sinfo);
2518 
2519         return 0;
2520 }
2521 
2522 static int rndis_set_pmksa(struct wiphy *wiphy, struct net_device *netdev,
2523                                 struct cfg80211_pmksa *pmksa)
2524 {
2525         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2526         struct usbnet *usbdev = priv->usbdev;
2527         struct ndis_80211_pmkid *pmkids;
2528         u32 *tmp = (u32 *)pmksa->pmkid;
2529 
2530         netdev_dbg(usbdev->net, "%s(%pM, %08X:%08X:%08X:%08X)\n", __func__,
2531                         pmksa->bssid,
2532                         cpu_to_be32(tmp[0]), cpu_to_be32(tmp[1]),
2533                         cpu_to_be32(tmp[2]), cpu_to_be32(tmp[3]));
2534 
2535         pmkids = get_device_pmkids(usbdev);
2536         if (IS_ERR(pmkids)) {
2537                 /* couldn't read PMKID cache from device */
2538                 return PTR_ERR(pmkids);
2539         }
2540 
2541         pmkids = update_pmkid(usbdev, pmkids, pmksa, wiphy->max_num_pmkids);
2542         if (IS_ERR(pmkids)) {
2543                 /* not found, list full, etc */
2544                 return PTR_ERR(pmkids);
2545         }
2546 
2547         return set_device_pmkids(usbdev, pmkids);
2548 }
2549 
2550 static int rndis_del_pmksa(struct wiphy *wiphy, struct net_device *netdev,
2551                                 struct cfg80211_pmksa *pmksa)
2552 {
2553         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2554         struct usbnet *usbdev = priv->usbdev;
2555         struct ndis_80211_pmkid *pmkids;
2556         u32 *tmp = (u32 *)pmksa->pmkid;
2557 
2558         netdev_dbg(usbdev->net, "%s(%pM, %08X:%08X:%08X:%08X)\n", __func__,
2559                         pmksa->bssid,
2560                         cpu_to_be32(tmp[0]), cpu_to_be32(tmp[1]),
2561                         cpu_to_be32(tmp[2]), cpu_to_be32(tmp[3]));
2562 
2563         pmkids = get_device_pmkids(usbdev);
2564         if (IS_ERR(pmkids)) {
2565                 /* Couldn't read PMKID cache from device */
2566                 return PTR_ERR(pmkids);
2567         }
2568 
2569         pmkids = remove_pmkid(usbdev, pmkids, pmksa, wiphy->max_num_pmkids);
2570         if (IS_ERR(pmkids)) {
2571                 /* not found, etc */
2572                 return PTR_ERR(pmkids);
2573         }
2574 
2575         return set_device_pmkids(usbdev, pmkids);
2576 }
2577 
2578 static int rndis_flush_pmksa(struct wiphy *wiphy, struct net_device *netdev)
2579 {
2580         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2581         struct usbnet *usbdev = priv->usbdev;
2582         struct ndis_80211_pmkid pmkid;
2583 
2584         netdev_dbg(usbdev->net, "%s()\n", __func__);
2585 
2586         memset(&pmkid, 0, sizeof(pmkid));
2587 
2588         pmkid.length = cpu_to_le32(sizeof(pmkid));
2589         pmkid.bssid_info_count = cpu_to_le32(0);
2590 
2591         return rndis_set_oid(usbdev, RNDIS_OID_802_11_PMKID,
2592                              &pmkid, sizeof(pmkid));
2593 }
2594 
2595 static int rndis_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2596                                 bool enabled, int timeout)
2597 {
2598         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2599         struct usbnet *usbdev = priv->usbdev;
2600         int power_mode;
2601         __le32 mode;
2602         int ret;
2603 
2604         if (priv->device_type != RNDIS_BCM4320B)
2605                 return -ENOTSUPP;
2606 
2607         netdev_dbg(usbdev->net, "%s(): %s, %d\n", __func__,
2608                                 enabled ? "enabled" : "disabled",
2609                                 timeout);
2610 
2611         if (enabled)
2612                 power_mode = NDIS_80211_POWER_MODE_FAST_PSP;
2613         else
2614                 power_mode = NDIS_80211_POWER_MODE_CAM;
2615 
2616         if (power_mode == priv->power_mode)
2617                 return 0;
2618 
2619         priv->power_mode = power_mode;
2620 
2621         mode = cpu_to_le32(power_mode);
2622         ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_POWER_MODE,
2623                             &mode, sizeof(mode));
2624 
2625         netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_POWER_MODE -> %d\n",
2626                                 __func__, ret);
2627 
2628         return ret;
2629 }
2630 
2631 static int rndis_set_cqm_rssi_config(struct wiphy *wiphy,
2632                                         struct net_device *dev,
2633                                         s32 rssi_thold, u32 rssi_hyst)
2634 {
2635         struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2636 
2637         priv->cqm_rssi_thold = rssi_thold;
2638         priv->cqm_rssi_hyst = rssi_hyst;
2639         priv->last_cqm_event_rssi = 0;
2640 
2641         return 0;
2642 }
2643 
2644 static void rndis_wlan_craft_connected_bss(struct usbnet *usbdev, u8 *bssid,
2645                                            struct ndis_80211_assoc_info *info)
2646 {
2647         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2648         struct ieee80211_channel *channel;
2649         struct ndis_80211_ssid ssid;
2650         struct cfg80211_bss *bss;
2651         s32 signal;
2652         u64 timestamp;
2653         u16 capability;
2654         u32 beacon_period = 0;
2655         __le32 rssi;
2656         u8 ie_buf[34];
2657         int len, ret, ie_len;
2658 
2659         /* Get signal quality, in case of error use rssi=0 and ignore error. */
2660         len = sizeof(rssi);
2661         rssi = 0;
2662         ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_RSSI,
2663                               &rssi, &len);
2664         signal = level_to_qual(le32_to_cpu(rssi));
2665 
2666         netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_RSSI -> %d, "
2667                    "rssi:%d, qual: %d\n", __func__, ret, le32_to_cpu(rssi),
2668                    level_to_qual(le32_to_cpu(rssi)));
2669 
2670         /* Get AP capabilities */
2671         if (info) {
2672                 capability = le16_to_cpu(info->resp_ie.capa);
2673         } else {
2674                 /* Set atleast ESS/IBSS capability */
2675                 capability = (priv->infra_mode == NDIS_80211_INFRA_INFRA) ?
2676                                 WLAN_CAPABILITY_ESS : WLAN_CAPABILITY_IBSS;
2677         }
2678 
2679         /* Get channel and beacon interval */
2680         channel = get_current_channel(usbdev, &beacon_period);
2681         if (!channel) {
2682                 netdev_warn(usbdev->net, "%s(): could not get channel.\n",
2683                                         __func__);
2684                 return;
2685         }
2686 
2687         /* Get SSID, in case of error, use zero length SSID and ignore error. */
2688         len = sizeof(ssid);
2689         memset(&ssid, 0, sizeof(ssid));
2690         ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_SSID,
2691                               &ssid, &len);
2692         netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_SSID -> %d, len: %d, ssid: "
2693                                 "'%.32s'\n", __func__, ret,
2694                                 le32_to_cpu(ssid.length), ssid.essid);
2695 
2696         if (le32_to_cpu(ssid.length) > 32)
2697                 ssid.length = cpu_to_le32(32);
2698 
2699         ie_buf[0] = WLAN_EID_SSID;
2700         ie_buf[1] = le32_to_cpu(ssid.length);
2701         memcpy(&ie_buf[2], ssid.essid, le32_to_cpu(ssid.length));
2702 
2703         ie_len = le32_to_cpu(ssid.length) + 2;
2704 
2705         /* no tsf */
2706         timestamp = 0;
2707 
2708         netdev_dbg(usbdev->net, "%s(): channel:%d(freq), bssid:[%pM], tsf:%d, "
2709                 "capa:%x, beacon int:%d, resp_ie(len:%d, essid:'%.32s'), "
2710                 "signal:%d\n", __func__, (channel ? channel->center_freq : -1),
2711                 bssid, (u32)timestamp, capability, beacon_period, ie_len,
2712                 ssid.essid, signal);
2713 
2714         bss = cfg80211_inform_bss(priv->wdev.wiphy, channel, bssid,
2715                 timestamp, capability, beacon_period, ie_buf, ie_len,
2716                 signal, GFP_KERNEL);
2717         cfg80211_put_bss(priv->wdev.wiphy, bss);
2718 }
2719 
2720 /*
2721  * workers, indication handlers, device poller
2722  */
2723 static void rndis_wlan_do_link_up_work(struct usbnet *usbdev)
2724 {
2725         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2726         struct ndis_80211_assoc_info *info = NULL;
2727         u8 bssid[ETH_ALEN];
2728         unsigned int resp_ie_len, req_ie_len;
2729         unsigned int offset;
2730         u8 *req_ie, *resp_ie;
2731         int ret;
2732         bool roamed = false;
2733         bool match_bss;
2734 
2735         if (priv->infra_mode == NDIS_80211_INFRA_INFRA && priv->connected) {
2736                 /* received media connect indication while connected, either
2737                  * device reassociated with same AP or roamed to new. */
2738                 roamed = true;
2739         }
2740 
2741         req_ie_len = 0;
2742         resp_ie_len = 0;
2743         req_ie = NULL;
2744         resp_ie = NULL;
2745 
2746         if (priv->infra_mode == NDIS_80211_INFRA_INFRA) {
2747                 info = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
2748                 if (!info) {
2749                         /* No memory? Try resume work later */
2750                         set_bit(WORK_LINK_UP, &priv->work_pending);
2751                         queue_work(priv->workqueue, &priv->work);
2752                         return;
2753                 }
2754 
2755                 /* Get association info IEs from device. */
2756                 ret = get_association_info(usbdev, info, CONTROL_BUFFER_SIZE);
2757                 if (!ret) {
2758                         req_ie_len = le32_to_cpu(info->req_ie_length);
2759                         if (req_ie_len > CONTROL_BUFFER_SIZE)
2760                                 req_ie_len = CONTROL_BUFFER_SIZE;
2761                         if (req_ie_len != 0) {
2762                                 offset = le32_to_cpu(info->offset_req_ies);
2763 
2764                                 if (offset > CONTROL_BUFFER_SIZE)
2765                                         offset = CONTROL_BUFFER_SIZE;
2766 
2767                                 req_ie = (u8 *)info + offset;
2768 
2769                                 if (offset + req_ie_len > CONTROL_BUFFER_SIZE)
2770                                         req_ie_len =
2771                                                 CONTROL_BUFFER_SIZE - offset;
2772                         }
2773 
2774                         resp_ie_len = le32_to_cpu(info->resp_ie_length);
2775                         if (resp_ie_len > CONTROL_BUFFER_SIZE)
2776                                 resp_ie_len = CONTROL_BUFFER_SIZE;
2777                         if (resp_ie_len != 0) {
2778                                 offset = le32_to_cpu(info->offset_resp_ies);
2779 
2780                                 if (offset > CONTROL_BUFFER_SIZE)
2781                                         offset = CONTROL_BUFFER_SIZE;
2782 
2783                                 resp_ie = (u8 *)info + offset;
2784 
2785                                 if (offset + resp_ie_len > CONTROL_BUFFER_SIZE)
2786                                         resp_ie_len =
2787                                                 CONTROL_BUFFER_SIZE - offset;
2788                         }
2789                 } else {
2790                         /* Since rndis_wlan_craft_connected_bss() might use info
2791                          * later and expects info to contain valid data if
2792                          * non-null, free info and set NULL here.
2793                          */
2794                         kfree(info);
2795                         info = NULL;
2796                 }
2797         } else if (WARN_ON(priv->infra_mode != NDIS_80211_INFRA_ADHOC))
2798                 return;
2799 
2800         ret = get_bssid(usbdev, bssid);
2801         if (ret < 0)
2802                 memset(bssid, 0, sizeof(bssid));
2803 
2804         netdev_dbg(usbdev->net, "link up work: [%pM]%s\n",
2805                    bssid, roamed ? " roamed" : "");
2806 
2807         /* Internal bss list in device should contain at least the currently
2808          * connected bss and we can get it to cfg80211 with
2809          * rndis_check_bssid_list().
2810          *
2811          * NDIS spec says: "If the device is associated, but the associated
2812          *  BSSID is not in its BSSID scan list, then the driver must add an
2813          *  entry for the BSSID at the end of the data that it returns in
2814          *  response to query of RNDIS_OID_802_11_BSSID_LIST."
2815          *
2816          * NOTE: Seems to be true for BCM4320b variant, but not BCM4320a.
2817          */
2818         match_bss = false;
2819         rndis_check_bssid_list(usbdev, bssid, &match_bss);
2820 
2821         if (!is_zero_ether_addr(bssid) && !match_bss) {
2822                 /* Couldn't get bss from device, we need to manually craft bss
2823                  * for cfg80211.
2824                  */
2825                 rndis_wlan_craft_connected_bss(usbdev, bssid, info);
2826         }
2827 
2828         if (priv->infra_mode == NDIS_80211_INFRA_INFRA) {
2829                 if (!roamed)
2830                         cfg80211_connect_result(usbdev->net, bssid, req_ie,
2831                                                 req_ie_len, resp_ie,
2832                                                 resp_ie_len, 0, GFP_KERNEL);
2833                 else
2834                         cfg80211_roamed(usbdev->net,
2835                                         get_current_channel(usbdev, NULL),
2836                                         bssid, req_ie, req_ie_len,
2837                                         resp_ie, resp_ie_len, GFP_KERNEL);
2838         } else if (priv->infra_mode == NDIS_80211_INFRA_ADHOC)
2839                 cfg80211_ibss_joined(usbdev->net, bssid,
2840                                      get_current_channel(usbdev, NULL),
2841                                      GFP_KERNEL);
2842 
2843         kfree(info);
2844 
2845         priv->connected = true;
2846         memcpy(priv->bssid, bssid, ETH_ALEN);
2847 
2848         usbnet_resume_rx(usbdev);
2849         netif_carrier_on(usbdev->net);
2850 }
2851 
2852 static void rndis_wlan_do_link_down_work(struct usbnet *usbdev)
2853 {
2854         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2855 
2856         if (priv->connected) {
2857                 priv->connected = false;
2858                 memset(priv->bssid, 0, ETH_ALEN);
2859 
2860                 deauthenticate(usbdev);
2861 
2862                 cfg80211_disconnected(usbdev->net, 0, NULL, 0, GFP_KERNEL);
2863         }
2864 
2865         netif_carrier_off(usbdev->net);
2866 }
2867 
2868 static void rndis_wlan_worker(struct work_struct *work)
2869 {
2870         struct rndis_wlan_private *priv =
2871                 container_of(work, struct rndis_wlan_private, work);
2872         struct usbnet *usbdev = priv->usbdev;
2873 
2874         if (test_and_clear_bit(WORK_LINK_UP, &priv->work_pending))
2875                 rndis_wlan_do_link_up_work(usbdev);
2876 
2877         if (test_and_clear_bit(WORK_LINK_DOWN, &priv->work_pending))
2878                 rndis_wlan_do_link_down_work(usbdev);
2879 
2880         if (test_and_clear_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending))
2881                 set_multicast_list(usbdev);
2882 }
2883 
2884 static void rndis_wlan_set_multicast_list(struct net_device *dev)
2885 {
2886         struct usbnet *usbdev = netdev_priv(dev);
2887         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2888 
2889         if (test_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending))
2890                 return;
2891 
2892         set_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending);
2893         queue_work(priv->workqueue, &priv->work);
2894 }
2895 
2896 static void rndis_wlan_auth_indication(struct usbnet *usbdev,
2897                                 struct ndis_80211_status_indication *indication,
2898                                 int len)
2899 {
2900         u8 *buf;
2901         const char *type;
2902         int flags, buflen, key_id;
2903         bool pairwise_error, group_error;
2904         struct ndis_80211_auth_request *auth_req;
2905         enum nl80211_key_type key_type;
2906 
2907         /* must have at least one array entry */
2908         if (len < offsetof(struct ndis_80211_status_indication, u) +
2909                                 sizeof(struct ndis_80211_auth_request)) {
2910                 netdev_info(usbdev->net, "authentication indication: too short message (%i)\n",
2911                             len);
2912                 return;
2913         }
2914 
2915         buf = (void *)&indication->u.auth_request[0];
2916         buflen = len - offsetof(struct ndis_80211_status_indication, u);
2917 
2918         while (buflen >= sizeof(*auth_req)) {
2919                 auth_req = (void *)buf;
2920                 type = "unknown";
2921                 flags = le32_to_cpu(auth_req->flags);
2922                 pairwise_error = false;
2923                 group_error = false;
2924 
2925                 if (flags & 0x1)
2926                         type = "reauth request";
2927                 if (flags & 0x2)
2928                         type = "key update request";
2929                 if (flags & 0x6) {
2930                         pairwise_error = true;
2931                         type = "pairwise_error";
2932                 }
2933                 if (flags & 0xe) {
2934                         group_error = true;
2935                         type = "group_error";
2936                 }
2937 
2938                 netdev_info(usbdev->net, "authentication indication: %s (0x%08x)\n",
2939                             type, le32_to_cpu(auth_req->flags));
2940 
2941                 if (pairwise_error) {
2942                         key_type = NL80211_KEYTYPE_PAIRWISE;
2943                         key_id = -1;
2944 
2945                         cfg80211_michael_mic_failure(usbdev->net,
2946                                                         auth_req->bssid,
2947                                                         key_type, key_id, NULL,
2948                                                         GFP_KERNEL);
2949                 }
2950 
2951                 if (group_error) {
2952                         key_type = NL80211_KEYTYPE_GROUP;
2953                         key_id = -1;
2954 
2955                         cfg80211_michael_mic_failure(usbdev->net,
2956                                                         auth_req->bssid,
2957                                                         key_type, key_id, NULL,
2958                                                         GFP_KERNEL);
2959                 }
2960 
2961                 buflen -= le32_to_cpu(auth_req->length);
2962                 buf += le32_to_cpu(auth_req->length);
2963         }
2964 }
2965 
2966 static void rndis_wlan_pmkid_cand_list_indication(struct usbnet *usbdev,
2967                                 struct ndis_80211_status_indication *indication,
2968                                 int len)
2969 {
2970         struct ndis_80211_pmkid_cand_list *cand_list;
2971         int list_len, expected_len, i;
2972 
2973         if (len < offsetof(struct ndis_80211_status_indication, u) +
2974                                 sizeof(struct ndis_80211_pmkid_cand_list)) {
2975                 netdev_info(usbdev->net, "pmkid candidate list indication: too short message (%i)\n",
2976                             len);
2977                 return;
2978         }
2979 
2980         list_len = le32_to_cpu(indication->u.cand_list.num_candidates) *
2981                         sizeof(struct ndis_80211_pmkid_candidate);
2982         expected_len = sizeof(struct ndis_80211_pmkid_cand_list) + list_len +
2983                         offsetof(struct ndis_80211_status_indication, u);
2984 
2985         if (len < expected_len) {
2986                 netdev_info(usbdev->net, "pmkid candidate list indication: list larger than buffer (%i < %i)\n",
2987                             len, expected_len);
2988                 return;
2989         }
2990 
2991         cand_list = &indication->u.cand_list;
2992 
2993         netdev_info(usbdev->net, "pmkid candidate list indication: version %i, candidates %i\n",
2994                     le32_to_cpu(cand_list->version),
2995                     le32_to_cpu(cand_list->num_candidates));
2996 
2997         if (le32_to_cpu(cand_list->version) != 1)
2998                 return;
2999 
3000         for (i = 0; i < le32_to_cpu(cand_list->num_candidates); i++) {
3001                 struct ndis_80211_pmkid_candidate *cand =
3002                                                 &cand_list->candidate_list[i];
3003                 bool preauth = !!(cand->flags & NDIS_80211_PMKID_CAND_PREAUTH);
3004 
3005                 netdev_dbg(usbdev->net, "cand[%i]: flags: 0x%08x, preauth: %d, bssid: %pM\n",
3006                            i, le32_to_cpu(cand->flags), preauth, cand->bssid);
3007 
3008                 cfg80211_pmksa_candidate_notify(usbdev->net, i, cand->bssid,
3009                                                 preauth, GFP_ATOMIC);
3010         }
3011 }
3012 
3013 static void rndis_wlan_media_specific_indication(struct usbnet *usbdev,
3014                         struct rndis_indicate *msg, int buflen)
3015 {
3016         struct ndis_80211_status_indication *indication;
3017         unsigned int len, offset;
3018 
3019         offset = offsetof(struct rndis_indicate, status) +
3020                         le32_to_cpu(msg->offset);
3021         len = le32_to_cpu(msg->length);
3022 
3023         if (len < 8) {
3024                 netdev_info(usbdev->net, "media specific indication, ignore too short message (%i < 8)\n",
3025                             len);
3026                 return;
3027         }
3028 
3029         if (len > buflen || offset > buflen || offset + len > buflen) {
3030                 netdev_info(usbdev->net, "media specific indication, too large to fit to buffer (%i > %i)\n",
3031                             offset + len, buflen);
3032                 return;
3033         }
3034 
3035         indication = (void *)((u8 *)msg + offset);
3036 
3037         switch (le32_to_cpu(indication->status_type)) {
3038         case NDIS_80211_STATUSTYPE_RADIOSTATE:
3039                 netdev_info(usbdev->net, "radio state indication: %i\n",
3040                             le32_to_cpu(indication->u.radio_status));
3041                 return;
3042 
3043         case NDIS_80211_STATUSTYPE_MEDIASTREAMMODE:
3044                 netdev_info(usbdev->net, "media stream mode indication: %i\n",
3045                             le32_to_cpu(indication->u.media_stream_mode));
3046                 return;
3047 
3048         case NDIS_80211_STATUSTYPE_AUTHENTICATION:
3049                 rndis_wlan_auth_indication(usbdev, indication, len);
3050                 return;
3051 
3052         case NDIS_80211_STATUSTYPE_PMKID_CANDIDATELIST:
3053                 rndis_wlan_pmkid_cand_list_indication(usbdev, indication, len);
3054                 return;
3055 
3056         default:
3057                 netdev_info(usbdev->net, "media specific indication: unknown status type 0x%08x\n",
3058                             le32_to_cpu(indication->status_type));
3059         }
3060 }
3061 
3062 static void rndis_wlan_indication(struct usbnet *usbdev, void *ind, int buflen)
3063 {
3064         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3065         struct rndis_indicate *msg = ind;
3066 
3067         switch (le32_to_cpu(msg->status)) {
3068         case RNDIS_STATUS_MEDIA_CONNECT:
3069                 if (priv->current_command_oid == RNDIS_OID_802_11_ADD_KEY) {
3070                         /* RNDIS_OID_802_11_ADD_KEY causes sometimes extra
3071                          * "media connect" indications which confuses driver
3072                          * and userspace to think that device is
3073                          * roaming/reassociating when it isn't.
3074                          */
3075                         netdev_dbg(usbdev->net, "ignored RNDIS_OID_802_11_ADD_KEY triggered 'media connect'\n");
3076                         return;
3077                 }
3078 
3079                 usbnet_pause_rx(usbdev);
3080 
3081                 netdev_info(usbdev->net, "media connect\n");
3082 
3083                 /* queue work to avoid recursive calls into rndis_command */
3084                 set_bit(WORK_LINK_UP, &priv->work_pending);
3085                 queue_work(priv->workqueue, &priv->work);
3086                 break;
3087 
3088         case RNDIS_STATUS_MEDIA_DISCONNECT:
3089                 netdev_info(usbdev->net, "media disconnect\n");
3090 
3091                 /* queue work to avoid recursive calls into rndis_command */
3092                 set_bit(WORK_LINK_DOWN, &priv->work_pending);
3093                 queue_work(priv->workqueue, &priv->work);
3094                 break;
3095 
3096         case RNDIS_STATUS_MEDIA_SPECIFIC_INDICATION:
3097                 rndis_wlan_media_specific_indication(usbdev, msg, buflen);
3098                 break;
3099 
3100         default:
3101                 netdev_info(usbdev->net, "indication: 0x%08x\n",
3102                             le32_to_cpu(msg->status));
3103                 break;
3104         }
3105 }
3106 
3107 static int rndis_wlan_get_caps(struct usbnet *usbdev, struct wiphy *wiphy)
3108 {
3109         struct {
3110                 __le32  num_items;
3111                 __le32  items[8];
3112         } networks_supported;
3113         struct ndis_80211_capability *caps;
3114         u8 caps_buf[sizeof(*caps) + sizeof(caps->auth_encr_pair) * 16];
3115         int len, retval, i, n;
3116         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3117 
3118         /* determine supported modes */
3119         len = sizeof(networks_supported);
3120         retval = rndis_query_oid(usbdev,
3121                                  RNDIS_OID_802_11_NETWORK_TYPES_SUPPORTED,
3122                                  &networks_supported, &len);
3123         if (retval >= 0) {
3124                 n = le32_to_cpu(networks_supported.num_items);
3125                 if (n > 8)
3126                         n = 8;
3127                 for (i = 0; i < n; i++) {
3128                         switch (le32_to_cpu(networks_supported.items[i])) {
3129                         case NDIS_80211_TYPE_FREQ_HOP:
3130                         case NDIS_80211_TYPE_DIRECT_SEQ:
3131                                 priv->caps |= CAP_MODE_80211B;
3132                                 break;
3133                         case NDIS_80211_TYPE_OFDM_A:
3134                                 priv->caps |= CAP_MODE_80211A;
3135                                 break;
3136                         case NDIS_80211_TYPE_OFDM_G:
3137                                 priv->caps |= CAP_MODE_80211G;
3138                                 break;
3139                         }
3140                 }
3141         }
3142 
3143         /* get device 802.11 capabilities, number of PMKIDs */
3144         caps = (struct ndis_80211_capability *)caps_buf;
3145         len = sizeof(caps_buf);
3146         retval = rndis_query_oid(usbdev,
3147                                  RNDIS_OID_802_11_CAPABILITY,
3148                                  caps, &len);
3149         if (retval >= 0) {
3150                 netdev_dbg(usbdev->net, "RNDIS_OID_802_11_CAPABILITY -> len %d, "
3151                                 "ver %d, pmkids %d, auth-encr-pairs %d\n",
3152                                 le32_to_cpu(caps->length),
3153                                 le32_to_cpu(caps->version),
3154                                 le32_to_cpu(caps->num_pmkids),
3155                                 le32_to_cpu(caps->num_auth_encr_pair));
3156                 wiphy->max_num_pmkids = le32_to_cpu(caps->num_pmkids);
3157         } else
3158                 wiphy->max_num_pmkids = 0;
3159 
3160         return retval;
3161 }
3162 
3163 static void rndis_do_cqm(struct usbnet *usbdev, s32 rssi)
3164 {
3165         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3166         enum nl80211_cqm_rssi_threshold_event event;
3167         int thold, hyst, last_event;
3168 
3169         if (priv->cqm_rssi_thold >= 0 || rssi >= 0)
3170                 return;
3171         if (priv->infra_mode != NDIS_80211_INFRA_INFRA)
3172                 return;
3173 
3174         last_event = priv->last_cqm_event_rssi;
3175         thold = priv->cqm_rssi_thold;
3176         hyst = priv->cqm_rssi_hyst;
3177 
3178         if (rssi < thold && (last_event == 0 || rssi < last_event - hyst))
3179                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
3180         else if (rssi > thold && (last_event == 0 || rssi > last_event + hyst))
3181                 event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
3182         else
3183                 return;
3184 
3185         priv->last_cqm_event_rssi = rssi;
3186         cfg80211_cqm_rssi_notify(usbdev->net, event, GFP_KERNEL);
3187 }
3188 
3189 #define DEVICE_POLLER_JIFFIES (HZ)
3190 static void rndis_device_poller(struct work_struct *work)
3191 {
3192         struct rndis_wlan_private *priv =
3193                 container_of(work, struct rndis_wlan_private,
3194                                                         dev_poller_work.work);
3195         struct usbnet *usbdev = priv->usbdev;
3196         __le32 rssi, tmp;
3197         int len, ret, j;
3198         int update_jiffies = DEVICE_POLLER_JIFFIES;
3199         void *buf;
3200 
3201         /* Only check/do workaround when connected. Calling is_associated()
3202          * also polls device with rndis_command() and catches for media link
3203          * indications.
3204          */
3205         if (!is_associated(usbdev)) {
3206                 /* Workaround bad scanning in BCM4320a devices with active
3207                  * background scanning when not associated.
3208                  */
3209                 if (priv->device_type == RNDIS_BCM4320A && priv->radio_on &&
3210                     !priv->scan_request) {
3211                         /* Get previous scan results */
3212                         rndis_check_bssid_list(usbdev, NULL, NULL);
3213 
3214                         /* Initiate new scan */
3215                         rndis_start_bssid_list_scan(usbdev);
3216                 }
3217 
3218                 goto end;
3219         }
3220 
3221         len = sizeof(rssi);
3222         ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_RSSI,
3223                               &rssi, &len);
3224         if (ret == 0) {
3225                 priv->last_qual = level_to_qual(le32_to_cpu(rssi));
3226                 rndis_do_cqm(usbdev, le32_to_cpu(rssi));
3227         }
3228 
3229         netdev_dbg(usbdev->net, "dev-poller: RNDIS_OID_802_11_RSSI -> %d, rssi:%d, qual: %d\n",
3230                    ret, le32_to_cpu(rssi), level_to_qual(le32_to_cpu(rssi)));
3231 
3232         /* Workaround transfer stalls on poor quality links.
3233          * TODO: find right way to fix these stalls (as stalls do not happen
3234          * with ndiswrapper/windows driver). */
3235         if (priv->param_workaround_interval > 0 && priv->last_qual <= 25) {
3236                 /* Decrease stats worker interval to catch stalls.
3237                  * faster. Faster than 400-500ms causes packet loss,
3238                  * Slower doesn't catch stalls fast enough.
3239                  */
3240                 j = msecs_to_jiffies(priv->param_workaround_interval);
3241                 if (j > DEVICE_POLLER_JIFFIES)
3242                         j = DEVICE_POLLER_JIFFIES;
3243                 else if (j <= 0)
3244                         j = 1;
3245                 update_jiffies = j;
3246 
3247                 /* Send scan OID. Use of both OIDs is required to get device
3248                  * working.
3249                  */
3250                 tmp = cpu_to_le32(1);
3251                 rndis_set_oid(usbdev,
3252                               RNDIS_OID_802_11_BSSID_LIST_SCAN,
3253                               &tmp, sizeof(tmp));
3254 
3255                 len = CONTROL_BUFFER_SIZE;
3256                 buf = kmalloc(len, GFP_KERNEL);
3257                 if (!buf)
3258                         goto end;
3259 
3260                 rndis_query_oid(usbdev,
3261                                 RNDIS_OID_802_11_BSSID_LIST,
3262                                 buf, &len);
3263                 kfree(buf);
3264         }
3265 
3266 end:
3267         if (update_jiffies >= HZ)
3268                 update_jiffies = round_jiffies_relative(update_jiffies);
3269         else {
3270                 j = round_jiffies_relative(update_jiffies);
3271                 if (abs(j - update_jiffies) <= 10)
3272                         update_jiffies = j;
3273         }
3274 
3275         queue_delayed_work(priv->workqueue, &priv->dev_poller_work,
3276                                                                 update_jiffies);
3277 }
3278 
3279 /*
3280  * driver/device initialization
3281  */
3282 static void rndis_copy_module_params(struct usbnet *usbdev, int device_type)
3283 {
3284         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3285 
3286         priv->device_type = device_type;
3287 
3288         priv->param_country[0] = modparam_country[0];
3289         priv->param_country[1] = modparam_country[1];
3290         priv->param_country[2] = 0;
3291         priv->param_frameburst   = modparam_frameburst;
3292         priv->param_afterburner  = modparam_afterburner;
3293         priv->param_power_save   = modparam_power_save;
3294         priv->param_power_output = modparam_power_output;
3295         priv->param_roamtrigger  = modparam_roamtrigger;
3296         priv->param_roamdelta    = modparam_roamdelta;
3297 
3298         priv->param_country[0] = toupper(priv->param_country[0]);
3299         priv->param_country[1] = toupper(priv->param_country[1]);
3300         /* doesn't support EU as country code, use FI instead */
3301         if (!strcmp(priv->param_country, "EU"))
3302                 strcpy(priv->param_country, "FI");
3303 
3304         if (priv->param_power_save < 0)
3305                 priv->param_power_save = 0;
3306         else if (priv->param_power_save > 2)
3307                 priv->param_power_save = 2;
3308 
3309         if (priv->param_power_output < 0)
3310                 priv->param_power_output = 0;
3311         else if (priv->param_power_output > 3)
3312                 priv->param_power_output = 3;
3313 
3314         if (priv->param_roamtrigger < -80)
3315                 priv->param_roamtrigger = -80;
3316         else if (priv->param_roamtrigger > -60)
3317                 priv->param_roamtrigger = -60;
3318 
3319         if (priv->param_roamdelta < 0)
3320                 priv->param_roamdelta = 0;
3321         else if (priv->param_roamdelta > 2)
3322                 priv->param_roamdelta = 2;
3323 
3324         if (modparam_workaround_interval < 0)
3325                 priv->param_workaround_interval = 500;
3326         else
3327                 priv->param_workaround_interval = modparam_workaround_interval;
3328 }
3329 
3330 static int unknown_early_init(struct usbnet *usbdev)
3331 {
3332         /* copy module parameters for unknown so that iwconfig reports txpower
3333          * and workaround parameter is copied to private structure correctly.
3334          */
3335         rndis_copy_module_params(usbdev, RNDIS_UNKNOWN);
3336 
3337         /* This is unknown device, so do not try set configuration parameters.
3338          */
3339 
3340         return 0;
3341 }
3342 
3343 static int bcm4320a_early_init(struct usbnet *usbdev)
3344 {
3345         /* copy module parameters for bcm4320a so that iwconfig reports txpower
3346          * and workaround parameter is copied to private structure correctly.
3347          */
3348         rndis_copy_module_params(usbdev, RNDIS_BCM4320A);
3349 
3350         /* bcm4320a doesn't handle configuration parameters well. Try
3351          * set any and you get partially zeroed mac and broken device.
3352          */
3353 
3354         return 0;
3355 }
3356 
3357 static int bcm4320b_early_init(struct usbnet *usbdev)
3358 {
3359         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3360         char buf[8];
3361 
3362         rndis_copy_module_params(usbdev, RNDIS_BCM4320B);
3363 
3364         /* Early initialization settings, setting these won't have effect
3365          * if called after generic_rndis_bind().
3366          */
3367 
3368         rndis_set_config_parameter_str(usbdev, "Country", priv->param_country);
3369         rndis_set_config_parameter_str(usbdev, "FrameBursting",
3370                                         priv->param_frameburst ? "1" : "");
3371         rndis_set_config_parameter_str(usbdev, "Afterburner",
3372                                         priv->param_afterburner ? "1" : "");
3373         sprintf(buf, "%d", priv->param_power_save);
3374         rndis_set_config_parameter_str(usbdev, "PowerSaveMode", buf);
3375         sprintf(buf, "%d", priv->param_power_output);
3376         rndis_set_config_parameter_str(usbdev, "PwrOut", buf);
3377         sprintf(buf, "%d", priv->param_roamtrigger);
3378         rndis_set_config_parameter_str(usbdev, "RoamTrigger", buf);
3379         sprintf(buf, "%d", priv->param_roamdelta);
3380         rndis_set_config_parameter_str(usbdev, "RoamDelta", buf);
3381 
3382         return 0;
3383 }
3384 
3385 /* same as rndis_netdev_ops but with local multicast handler */
3386 static const struct net_device_ops rndis_wlan_netdev_ops = {
3387         .ndo_open               = usbnet_open,
3388         .ndo_stop               = usbnet_stop,
3389         .ndo_start_xmit         = usbnet_start_xmit,
3390         .ndo_tx_timeout         = usbnet_tx_timeout,
3391         .ndo_set_mac_address    = eth_mac_addr,
3392         .ndo_validate_addr      = eth_validate_addr,
3393         .ndo_set_rx_mode        = rndis_wlan_set_multicast_list,
3394 };
3395 
3396 static int rndis_wlan_bind(struct usbnet *usbdev, struct usb_interface *intf)
3397 {
3398         struct wiphy *wiphy;
3399         struct rndis_wlan_private *priv;
3400         int retval, len;
3401         __le32 tmp;
3402 
3403         /* allocate wiphy and rndis private data
3404          * NOTE: We only support a single virtual interface, so wiphy
3405          * and wireless_dev are somewhat synonymous for this device.
3406          */
3407         wiphy = wiphy_new(&rndis_config_ops, sizeof(struct rndis_wlan_private));
3408         if (!wiphy)
3409                 return -ENOMEM;
3410 
3411         priv = wiphy_priv(wiphy);
3412         usbdev->net->ieee80211_ptr = &priv->wdev;
3413         priv->wdev.wiphy = wiphy;
3414         priv->wdev.iftype = NL80211_IFTYPE_STATION;
3415 
3416         /* These have to be initialized before calling generic_rndis_bind().
3417          * Otherwise we'll be in big trouble in rndis_wlan_early_init().
3418          */
3419         usbdev->driver_priv = priv;
3420         priv->usbdev = usbdev;
3421 
3422         mutex_init(&priv->command_lock);
3423 
3424         /* because rndis_command() sleeps we need to use workqueue */
3425         priv->workqueue = create_singlethread_workqueue("rndis_wlan");
3426         INIT_WORK(&priv->work, rndis_wlan_worker);
3427         INIT_DELAYED_WORK(&priv->dev_poller_work, rndis_device_poller);
3428         INIT_DELAYED_WORK(&priv->scan_work, rndis_get_scan_results);
3429 
3430         /* try bind rndis_host */
3431         retval = generic_rndis_bind(usbdev, intf, FLAG_RNDIS_PHYM_WIRELESS);
3432         if (retval < 0)
3433                 goto fail;
3434 
3435         /* generic_rndis_bind set packet filter to multicast_all+
3436          * promisc mode which doesn't work well for our devices (device
3437          * picks up rssi to closest station instead of to access point).
3438          *
3439          * rndis_host wants to avoid all OID as much as possible
3440          * so do promisc/multicast handling in rndis_wlan.
3441          */
3442         usbdev->net->netdev_ops = &rndis_wlan_netdev_ops;
3443 
3444         tmp = cpu_to_le32(RNDIS_PACKET_TYPE_DIRECTED | RNDIS_PACKET_TYPE_BROADCAST);
3445         retval = rndis_set_oid(usbdev,
3446                                RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
3447                                &tmp, sizeof(tmp));
3448 
3449         len = sizeof(tmp);
3450         retval = rndis_query_oid(usbdev,
3451                                  RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
3452                                  &tmp, &len);
3453         priv->multicast_size = le32_to_cpu(tmp);
3454         if (retval < 0 || priv->multicast_size < 0)
3455                 priv->multicast_size = 0;
3456         if (priv->multicast_size > 0)
3457                 usbdev->net->flags |= IFF_MULTICAST;
3458         else
3459                 usbdev->net->flags &= ~IFF_MULTICAST;
3460 
3461         /* fill-out wiphy structure and register w/ cfg80211 */
3462         memcpy(wiphy->perm_addr, usbdev->net->dev_addr, ETH_ALEN);
3463         wiphy->privid = rndis_wiphy_privid;
3464         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
3465                                         | BIT(NL80211_IFTYPE_ADHOC);
3466         wiphy->max_scan_ssids = 1;
3467 
3468         /* TODO: fill-out band/encr information based on priv->caps */
3469         rndis_wlan_get_caps(usbdev, wiphy);
3470 
3471         memcpy(priv->channels, rndis_channels, sizeof(rndis_channels));
3472         memcpy(priv->rates, rndis_rates, sizeof(rndis_rates));
3473         priv->band.channels = priv->channels;
3474         priv->band.n_channels = ARRAY_SIZE(rndis_channels);
3475         priv->band.bitrates = priv->rates;
3476         priv->band.n_bitrates = ARRAY_SIZE(rndis_rates);
3477         wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
3478         wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
3479 
3480         memcpy(priv->cipher_suites, rndis_cipher_suites,
3481                                                 sizeof(rndis_cipher_suites));
3482         wiphy->cipher_suites = priv->cipher_suites;
3483         wiphy->n_cipher_suites = ARRAY_SIZE(rndis_cipher_suites);
3484 
3485         set_wiphy_dev(wiphy, &usbdev->udev->dev);
3486 
3487         if (wiphy_register(wiphy)) {
3488                 retval = -ENODEV;
3489                 goto fail;
3490         }
3491 
3492         set_default_iw_params(usbdev);
3493 
3494         priv->power_mode = -1;
3495 
3496         /* set default rts/frag */
3497         rndis_set_wiphy_params(wiphy,
3498                         WIPHY_PARAM_FRAG_THRESHOLD | WIPHY_PARAM_RTS_THRESHOLD);
3499 
3500         /* turn radio off on init */
3501         priv->radio_on = false;
3502         disassociate(usbdev, false);
3503         netif_carrier_off(usbdev->net);
3504 
3505         return 0;
3506 
3507 fail:
3508         cancel_delayed_work_sync(&priv->dev_poller_work);
3509         cancel_delayed_work_sync(&priv->scan_work);
3510         cancel_work_sync(&priv->work);
3511         flush_workqueue(priv->workqueue);
3512         destroy_workqueue(priv->workqueue);
3513 
3514         wiphy_free(wiphy);
3515         return retval;
3516 }
3517 
3518 static void rndis_wlan_unbind(struct usbnet *usbdev, struct usb_interface *intf)
3519 {
3520         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3521 
3522         /* turn radio off */
3523         disassociate(usbdev, false);
3524 
3525         cancel_delayed_work_sync(&priv->dev_poller_work);
3526         cancel_delayed_work_sync(&priv->scan_work);
3527         cancel_work_sync(&priv->work);
3528         flush_workqueue(priv->workqueue);
3529         destroy_workqueue(priv->workqueue);
3530 
3531         rndis_unbind(usbdev, intf);
3532 
3533         wiphy_unregister(priv->wdev.wiphy);
3534         wiphy_free(priv->wdev.wiphy);
3535 }
3536 
3537 static int rndis_wlan_reset(struct usbnet *usbdev)
3538 {
3539         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3540         int retval;
3541 
3542         netdev_dbg(usbdev->net, "%s()\n", __func__);
3543 
3544         retval = rndis_reset(usbdev);
3545         if (retval)
3546                 netdev_warn(usbdev->net, "rndis_reset failed: %d\n", retval);
3547 
3548         /* rndis_reset cleared multicast list, so restore here.
3549            (set_multicast_list() also turns on current packet filter) */
3550         set_multicast_list(usbdev);
3551 
3552         queue_delayed_work(priv->workqueue, &priv->dev_poller_work,
3553                 round_jiffies_relative(DEVICE_POLLER_JIFFIES));
3554 
3555         return deauthenticate(usbdev);
3556 }
3557 
3558 static int rndis_wlan_stop(struct usbnet *usbdev)
3559 {
3560         struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3561         int retval;
3562         __le32 filter;
3563 
3564         netdev_dbg(usbdev->net, "%s()\n", __func__);
3565 
3566         retval = disassociate(usbdev, false);
3567 
3568         priv->work_pending = 0;
3569         cancel_delayed_work_sync(&priv->dev_poller_work);
3570         cancel_delayed_work_sync(&priv->scan_work);
3571         cancel_work_sync(&priv->work);
3572         flush_workqueue(priv->workqueue);
3573 
3574         if (priv->scan_request) {
3575                 cfg80211_scan_done(priv->scan_request, true);
3576                 priv->scan_request = NULL;
3577         }
3578 
3579         /* Set current packet filter zero to block receiving data packets from
3580            device. */
3581         filter = 0;
3582         rndis_set_oid(usbdev, RNDIS_OID_GEN_CURRENT_PACKET_FILTER, &filter,
3583                                                                 sizeof(filter));
3584 
3585         return retval;
3586 }
3587 
3588 static const struct driver_info bcm4320b_info = {
3589         .description =  "Wireless RNDIS device, BCM4320b based",
3590         .flags =        FLAG_WLAN | FLAG_FRAMING_RN | FLAG_NO_SETINT |
3591                                 FLAG_AVOID_UNLINK_URBS,
3592         .bind =         rndis_wlan_bind,
3593         .unbind =       rndis_wlan_unbind,
3594         .status =       rndis_status,
3595         .rx_fixup =     rndis_rx_fixup,
3596         .tx_fixup =     rndis_tx_fixup,
3597         .reset =        rndis_wlan_reset,
3598         .stop =         rndis_wlan_stop,
3599         .early_init =   bcm4320b_early_init,
3600         .indication =   rndis_wlan_indication,
3601 };
3602 
3603 static const struct driver_info bcm4320a_info = {
3604         .description =  "Wireless RNDIS device, BCM4320a based",
3605         .flags =        FLAG_WLAN | FLAG_FRAMING_RN | FLAG_NO_SETINT |
3606                                 FLAG_AVOID_UNLINK_URBS,
3607         .bind =         rndis_wlan_bind,
3608         .unbind =       rndis_wlan_unbind,
3609         .status =       rndis_status,
3610         .rx_fixup =     rndis_rx_fixup,
3611         .tx_fixup =     rndis_tx_fixup,
3612         .reset =        rndis_wlan_reset,
3613         .stop =         rndis_wlan_stop,
3614         .early_init =   bcm4320a_early_init,
3615         .indication =   rndis_wlan_indication,
3616 };
3617 
3618 static const struct driver_info rndis_wlan_info = {
3619         .description =  "Wireless RNDIS device",
3620         .flags =        FLAG_WLAN | FLAG_FRAMING_RN | FLAG_NO_SETINT |
3621                                 FLAG_AVOID_UNLINK_URBS,
3622         .bind =         rndis_wlan_bind,
3623         .unbind =       rndis_wlan_unbind,
3624         .status =       rndis_status,
3625         .rx_fixup =     rndis_rx_fixup,
3626         .tx_fixup =     rndis_tx_fixup,
3627         .reset =        rndis_wlan_reset,
3628         .stop =         rndis_wlan_stop,
3629         .early_init =   unknown_early_init,
3630         .indication =   rndis_wlan_indication,
3631 };
3632 
3633 /*-------------------------------------------------------------------------*/
3634 
3635 static const struct usb_device_id products [] = {
3636 #define RNDIS_MASTER_INTERFACE \
3637         .bInterfaceClass        = USB_CLASS_COMM, \
3638         .bInterfaceSubClass     = 2 /* ACM */, \
3639         .bInterfaceProtocol     = 0x0ff
3640 
3641 /* INF driver for these devices have DriverVer >= 4.xx.xx.xx and many custom
3642  * parameters available. Chipset marked as 'BCM4320SKFBG' in NDISwrapper-wiki.
3643  */
3644 {
3645         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3646                           | USB_DEVICE_ID_MATCH_DEVICE,
3647         .idVendor               = 0x0411,
3648         .idProduct              = 0x00bc,       /* Buffalo WLI-U2-KG125S */
3649         RNDIS_MASTER_INTERFACE,
3650         .driver_info            = (unsigned long) &bcm4320b_info,
3651 }, {
3652         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3653                           | USB_DEVICE_ID_MATCH_DEVICE,
3654         .idVendor               = 0x0baf,
3655         .idProduct              = 0x011b,       /* U.S. Robotics USR5421 */
3656         RNDIS_MASTER_INTERFACE,
3657         .driver_info            = (unsigned long) &bcm4320b_info,
3658 }, {
3659         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3660                           | USB_DEVICE_ID_MATCH_DEVICE,
3661         .idVendor               = 0x050d,
3662         .idProduct              = 0x011b,       /* Belkin F5D7051 */
3663         RNDIS_MASTER_INTERFACE,
3664         .driver_info            = (unsigned long) &bcm4320b_info,
3665 }, {
3666         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3667                           | USB_DEVICE_ID_MATCH_DEVICE,
3668         .idVendor               = 0x1799,       /* Belkin has two vendor ids */
3669         .idProduct              = 0x011b,       /* Belkin F5D7051 */
3670         RNDIS_MASTER_INTERFACE,
3671         .driver_info            = (unsigned long) &bcm4320b_info,
3672 }, {
3673         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3674                           | USB_DEVICE_ID_MATCH_DEVICE,
3675         .idVendor               = 0x13b1,
3676         .idProduct              = 0x0014,       /* Linksys WUSB54GSv2 */
3677         RNDIS_MASTER_INTERFACE,
3678         .driver_info            = (unsigned long) &bcm4320b_info,
3679 }, {
3680         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3681                           | USB_DEVICE_ID_MATCH_DEVICE,
3682         .idVendor               = 0x13b1,
3683         .idProduct              = 0x0026,       /* Linksys WUSB54GSC */
3684         RNDIS_MASTER_INTERFACE,
3685         .driver_info            = (unsigned long) &bcm4320b_info,
3686 }, {
3687         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3688                           | USB_DEVICE_ID_MATCH_DEVICE,
3689         .idVendor               = 0x0b05,
3690         .idProduct              = 0x1717,       /* Asus WL169gE */
3691         RNDIS_MASTER_INTERFACE,
3692         .driver_info            = (unsigned long) &bcm4320b_info,
3693 }, {
3694         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3695                           | USB_DEVICE_ID_MATCH_DEVICE,
3696         .idVendor               = 0x0a5c,
3697         .idProduct              = 0xd11b,       /* Eminent EM4045 */
3698         RNDIS_MASTER_INTERFACE,
3699         .driver_info            = (unsigned long) &bcm4320b_info,
3700 }, {
3701         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3702                           | USB_DEVICE_ID_MATCH_DEVICE,
3703         .idVendor               = 0x1690,
3704         .idProduct              = 0x0715,       /* BT Voyager 1055 */
3705         RNDIS_MASTER_INTERFACE,
3706         .driver_info            = (unsigned long) &bcm4320b_info,
3707 },
3708 /* These devices have DriverVer < 4.xx.xx.xx and do not have any custom
3709  * parameters available, hardware probably contain older firmware version with
3710  * no way of updating. Chipset marked as 'BCM4320????' in NDISwrapper-wiki.
3711  */
3712 {
3713         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3714                           | USB_DEVICE_ID_MATCH_DEVICE,
3715         .idVendor               = 0x13b1,
3716         .idProduct              = 0x000e,       /* Linksys WUSB54GSv1 */
3717         RNDIS_MASTER_INTERFACE,
3718         .driver_info            = (unsigned long) &bcm4320a_info,
3719 }, {
3720         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3721                           | USB_DEVICE_ID_MATCH_DEVICE,
3722         .idVendor               = 0x0baf,
3723         .idProduct              = 0x0111,       /* U.S. Robotics USR5420 */
3724         RNDIS_MASTER_INTERFACE,
3725         .driver_info            = (unsigned long) &bcm4320a_info,
3726 }, {
3727         .match_flags    =   USB_DEVICE_ID_MATCH_INT_INFO
3728                           | USB_DEVICE_ID_MATCH_DEVICE,
3729         .idVendor               = 0x0411,
3730         .idProduct              = 0x004b,       /* BUFFALO WLI-USB-G54 */
3731         RNDIS_MASTER_INTERFACE,
3732         .driver_info            = (unsigned long) &bcm4320a_info,
3733 },
3734 /* Generic Wireless RNDIS devices that we don't have exact
3735  * idVendor/idProduct/chip yet.
3736  */
3737 {
3738         /* RNDIS is MSFT's un-official variant of CDC ACM */
3739         USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
3740         .driver_info = (unsigned long) &rndis_wlan_info,
3741 }, {
3742         /* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */
3743         USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1),
3744         .driver_info = (unsigned long) &rndis_wlan_info,
3745 },
3746         { },            // END
3747 };
3748 MODULE_DEVICE_TABLE(usb, products);
3749 
3750 static struct usb_driver rndis_wlan_driver = {
3751         .name =         "rndis_wlan",
3752         .id_table =     products,
3753         .probe =        usbnet_probe,
3754         .disconnect =   usbnet_disconnect,
3755         .suspend =      usbnet_suspend,
3756         .resume =       usbnet_resume,
3757         .disable_hub_initiated_lpm = 1,
3758 };
3759 
3760 module_usb_driver(rndis_wlan_driver);
3761 
3762 MODULE_AUTHOR("Bjorge Dijkstra");
3763 MODULE_AUTHOR("Jussi Kivilinna");
3764 MODULE_DESCRIPTION("Driver for RNDIS based USB Wireless adapters");
3765 MODULE_LICENSE("GPL");
3766 
3767 

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