1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Driver for RNDIS based USB wireless devices.
4  *
5  * Copyright (C) 2007 by Bjorge Dijkstra <bjd@jooz.net>
6  * Copyright (C) 2008-2009 by Jussi Kivilinna <jussi.kivilinna@iki.fi>
7  *
8  *  Portions of this file are based on NDISwrapper project,
9  *  Copyright (C) 2003-2005 Pontus Fuchs, Giridhar Pemmasani
10  *  http://ndiswrapper.sourceforge.net/
11  */
12 
13 // #define	DEBUG			// error path messages, extra info
14 // #define	VERBOSE			// more; success messages
15 
16 #include <linux/module.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/ethtool.h>
20 #include <linux/workqueue.h>
21 #include <linux/mutex.h>
22 #include <linux/mii.h>
23 #include <linux/usb.h>
24 #include <linux/usb/cdc.h>
25 #include <linux/ieee80211.h>
26 #include <linux/if_arp.h>
27 #include <linux/ctype.h>
28 #include <linux/spinlock.h>
29 #include <linux/slab.h>
30 #include <net/cfg80211.h>
31 #include <linux/usb/usbnet.h>
32 #include <linux/usb/rndis_host.h>
33 
34 
35 /* NOTE: All these are settings for Broadcom chipset */
36 static char modparam_country[4] = "EU";
37 module_param_string(country, modparam_country, 4, 0444);
38 MODULE_PARM_DESC(country, "Country code (ISO 3166-1 alpha-2), default: EU");
39 
40 static int modparam_frameburst = 1;
41 module_param_named(frameburst, modparam_frameburst, int, 0444);
42 MODULE_PARM_DESC(frameburst, "enable frame bursting (default: on)");
43 
44 static int modparam_afterburner = 0;
45 module_param_named(afterburner, modparam_afterburner, int, 0444);
46 MODULE_PARM_DESC(afterburner,
47 	"enable afterburner aka '125 High Speed Mode' (default: off)");
48 
49 static int modparam_power_save = 0;
50 module_param_named(power_save, modparam_power_save, int, 0444);
51 MODULE_PARM_DESC(power_save,
52 	"set power save mode: 0=off, 1=on, 2=fast (default: off)");
53 
54 static int modparam_power_output = 3;
55 module_param_named(power_output, modparam_power_output, int, 0444);
56 MODULE_PARM_DESC(power_output,
57 	"set power output: 0=25%, 1=50%, 2=75%, 3=100% (default: 100%)");
58 
59 static int modparam_roamtrigger = -70;
60 module_param_named(roamtrigger, modparam_roamtrigger, int, 0444);
61 MODULE_PARM_DESC(roamtrigger,
62 	"set roaming dBm trigger: -80=optimize for distance, "
63 				"-60=bandwidth (default: -70)");
64 
65 static int modparam_roamdelta = 1;
66 module_param_named(roamdelta, modparam_roamdelta, int, 0444);
67 MODULE_PARM_DESC(roamdelta,
68 	"set roaming tendency: 0=aggressive, 1=moderate, "
69 				"2=conservative (default: moderate)");
70 
71 static int modparam_workaround_interval;
72 module_param_named(workaround_interval, modparam_workaround_interval,
73 							int, 0444);
74 MODULE_PARM_DESC(workaround_interval,
75 	"set stall workaround interval in msecs (0=disabled) (default: 0)");
76 
77 /* Typical noise/maximum signal level values taken from ndiswrapper iw_ndis.h */
78 #define	WL_NOISE	-96	/* typical noise level in dBm */
79 #define	WL_SIGMAX	-32	/* typical maximum signal level in dBm */
80 
81 
82 /* Assume that Broadcom 4320 (only chipset at time of writing known to be
83  * based on wireless rndis) has default txpower of 13dBm.
84  * This value is from Linksys WUSB54GSC User Guide, Appendix F: Specifications.
85  *  100% : 20 mW ~ 13dBm
86  *   75% : 15 mW ~ 12dBm
87  *   50% : 10 mW ~ 10dBm
88  *   25% :  5 mW ~  7dBm
89  */
90 #define BCM4320_DEFAULT_TXPOWER_DBM_100 13
91 #define BCM4320_DEFAULT_TXPOWER_DBM_75  12
92 #define BCM4320_DEFAULT_TXPOWER_DBM_50  10
93 #define BCM4320_DEFAULT_TXPOWER_DBM_25  7
94 
95 /* Known device types */
96 #define RNDIS_UNKNOWN	0
97 #define RNDIS_BCM4320A	1
98 #define RNDIS_BCM4320B	2
99 
100 
101 /* NDIS data structures. Taken from wpa_supplicant driver_ndis.c
102  * slightly modified for datatype endianess, etc
103  */
104 #define NDIS_802_11_LENGTH_SSID 32
105 #define NDIS_802_11_LENGTH_RATES 8
106 #define NDIS_802_11_LENGTH_RATES_EX 16
107 
108 enum ndis_80211_net_type {
109 	NDIS_80211_TYPE_FREQ_HOP,
110 	NDIS_80211_TYPE_DIRECT_SEQ,
111 	NDIS_80211_TYPE_OFDM_A,
112 	NDIS_80211_TYPE_OFDM_G
113 };
114 
115 enum ndis_80211_net_infra {
116 	NDIS_80211_INFRA_ADHOC,
117 	NDIS_80211_INFRA_INFRA,
118 	NDIS_80211_INFRA_AUTO_UNKNOWN
119 };
120 
121 enum ndis_80211_auth_mode {
122 	NDIS_80211_AUTH_OPEN,
123 	NDIS_80211_AUTH_SHARED,
124 	NDIS_80211_AUTH_AUTO_SWITCH,
125 	NDIS_80211_AUTH_WPA,
126 	NDIS_80211_AUTH_WPA_PSK,
127 	NDIS_80211_AUTH_WPA_NONE,
128 	NDIS_80211_AUTH_WPA2,
129 	NDIS_80211_AUTH_WPA2_PSK
130 };
131 
132 enum ndis_80211_encr_status {
133 	NDIS_80211_ENCR_WEP_ENABLED,
134 	NDIS_80211_ENCR_DISABLED,
135 	NDIS_80211_ENCR_WEP_KEY_ABSENT,
136 	NDIS_80211_ENCR_NOT_SUPPORTED,
137 	NDIS_80211_ENCR_TKIP_ENABLED,
138 	NDIS_80211_ENCR_TKIP_KEY_ABSENT,
139 	NDIS_80211_ENCR_CCMP_ENABLED,
140 	NDIS_80211_ENCR_CCMP_KEY_ABSENT
141 };
142 
143 enum ndis_80211_priv_filter {
144 	NDIS_80211_PRIV_ACCEPT_ALL,
145 	NDIS_80211_PRIV_8021X_WEP
146 };
147 
148 enum ndis_80211_status_type {
149 	NDIS_80211_STATUSTYPE_AUTHENTICATION,
150 	NDIS_80211_STATUSTYPE_MEDIASTREAMMODE,
151 	NDIS_80211_STATUSTYPE_PMKID_CANDIDATELIST,
152 	NDIS_80211_STATUSTYPE_RADIOSTATE,
153 };
154 
155 enum ndis_80211_media_stream_mode {
156 	NDIS_80211_MEDIA_STREAM_OFF,
157 	NDIS_80211_MEDIA_STREAM_ON
158 };
159 
160 enum ndis_80211_radio_status {
161 	NDIS_80211_RADIO_STATUS_ON,
162 	NDIS_80211_RADIO_STATUS_HARDWARE_OFF,
163 	NDIS_80211_RADIO_STATUS_SOFTWARE_OFF,
164 };
165 
166 enum ndis_80211_addkey_bits {
167 	NDIS_80211_ADDKEY_8021X_AUTH = cpu_to_le32(1 << 28),
168 	NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ = cpu_to_le32(1 << 29),
169 	NDIS_80211_ADDKEY_PAIRWISE_KEY = cpu_to_le32(1 << 30),
170 	NDIS_80211_ADDKEY_TRANSMIT_KEY = cpu_to_le32(1 << 31)
171 };
172 
173 enum ndis_80211_addwep_bits {
174 	NDIS_80211_ADDWEP_PERCLIENT_KEY = cpu_to_le32(1 << 30),
175 	NDIS_80211_ADDWEP_TRANSMIT_KEY = cpu_to_le32(1 << 31)
176 };
177 
178 enum ndis_80211_power_mode {
179 	NDIS_80211_POWER_MODE_CAM,
180 	NDIS_80211_POWER_MODE_MAX_PSP,
181 	NDIS_80211_POWER_MODE_FAST_PSP,
182 };
183 
184 enum ndis_80211_pmkid_cand_list_flag_bits {
185 	NDIS_80211_PMKID_CAND_PREAUTH = cpu_to_le32(1 << 0)
186 };
187 
188 struct ndis_80211_auth_request {
189 	__le32 length;
190 	u8 bssid[ETH_ALEN];
191 	u8 padding[2];
192 	__le32 flags;
193 } __packed;
194 
195 struct ndis_80211_pmkid_candidate {
196 	u8 bssid[ETH_ALEN];
197 	u8 padding[2];
198 	__le32 flags;
199 } __packed;
200 
201 struct ndis_80211_pmkid_cand_list {
202 	__le32 version;
203 	__le32 num_candidates;
204 	struct ndis_80211_pmkid_candidate candidate_list[];
205 } __packed;
206 
207 struct ndis_80211_status_indication {
208 	__le32 status_type;
209 	union {
210 		__le32					media_stream_mode;
211 		__le32					radio_status;
212 		DECLARE_FLEX_ARRAY(struct ndis_80211_auth_request, auth_request);
213 		struct ndis_80211_pmkid_cand_list	cand_list;
214 	} u;
215 } __packed;
216 
217 struct ndis_80211_ssid {
218 	__le32 length;
219 	u8 essid[NDIS_802_11_LENGTH_SSID];
220 } __packed;
221 
222 struct ndis_80211_conf_freq_hop {
223 	__le32 length;
224 	__le32 hop_pattern;
225 	__le32 hop_set;
226 	__le32 dwell_time;
227 } __packed;
228 
229 struct ndis_80211_conf {
230 	__le32 length;
231 	__le32 beacon_period;
232 	__le32 atim_window;
233 	__le32 ds_config;
234 	struct ndis_80211_conf_freq_hop fh_config;
235 } __packed;
236 
237 struct ndis_80211_bssid_ex {
238 	__le32 length;
239 	u8 mac[ETH_ALEN];
240 	u8 padding[2];
241 	struct ndis_80211_ssid ssid;
242 	__le32 privacy;
243 	__le32 rssi;
244 	__le32 net_type;
245 	struct ndis_80211_conf config;
246 	__le32 net_infra;
247 	u8 rates[NDIS_802_11_LENGTH_RATES_EX];
248 	__le32 ie_length;
249 	u8 ies[];
250 } __packed;
251 
252 struct ndis_80211_bssid_list_ex {
253 	__le32 num_items;
254 	u8 bssid_data[];
255 } __packed;
256 
257 struct ndis_80211_fixed_ies {
258 	u8 timestamp[8];
259 	__le16 beacon_interval;
260 	__le16 capabilities;
261 } __packed;
262 
263 struct ndis_80211_wep_key {
264 	__le32 size;
265 	__le32 index;
266 	__le32 length;
267 	u8 material[32];
268 } __packed;
269 
270 struct ndis_80211_key {
271 	__le32 size;
272 	__le32 index;
273 	__le32 length;
274 	u8 bssid[ETH_ALEN];
275 	u8 padding[6];
276 	u8 rsc[8];
277 	u8 material[32];
278 } __packed;
279 
280 struct ndis_80211_remove_key {
281 	__le32 size;
282 	__le32 index;
283 	u8 bssid[ETH_ALEN];
284 	u8 padding[2];
285 } __packed;
286 
287 struct ndis_config_param {
288 	__le32 name_offs;
289 	__le32 name_length;
290 	__le32 type;
291 	__le32 value_offs;
292 	__le32 value_length;
293 } __packed;
294 
295 struct ndis_80211_assoc_info {
296 	__le32 length;
297 	__le16 req_ies;
298 	struct req_ie {
299 		__le16 capa;
300 		__le16 listen_interval;
301 		u8 cur_ap_address[ETH_ALEN];
302 	} req_ie;
303 	__le32 req_ie_length;
304 	__le32 offset_req_ies;
305 	__le16 resp_ies;
306 	struct resp_ie {
307 		__le16 capa;
308 		__le16 status_code;
309 		__le16 assoc_id;
310 	} resp_ie;
311 	__le32 resp_ie_length;
312 	__le32 offset_resp_ies;
313 } __packed;
314 
315 struct ndis_80211_capability {
316 	__le32 length;
317 	__le32 version;
318 	__le32 num_pmkids;
319 	__le32 num_auth_encr_pair;
320 } __packed;
321 
322 struct ndis_80211_bssid_info {
323 	u8 bssid[ETH_ALEN];
324 	u8 pmkid[16];
325 } __packed;
326 
327 struct ndis_80211_pmkid {
328 	__le32 length;
329 	__le32 bssid_info_count;
330 	struct ndis_80211_bssid_info bssid_info[];
331 } __packed;
332 
333 /*
334  *  private data
335  */
336 #define CAP_MODE_80211A		1
337 #define CAP_MODE_80211B		2
338 #define CAP_MODE_80211G		4
339 #define CAP_MODE_MASK		7
340 
341 #define WORK_LINK_UP		0
342 #define WORK_LINK_DOWN		1
343 #define WORK_SET_MULTICAST_LIST	2
344 
345 #define RNDIS_WLAN_ALG_NONE	0
346 #define RNDIS_WLAN_ALG_WEP	(1<<0)
347 #define RNDIS_WLAN_ALG_TKIP	(1<<1)
348 #define RNDIS_WLAN_ALG_CCMP	(1<<2)
349 
350 #define RNDIS_WLAN_NUM_KEYS		4
351 #define RNDIS_WLAN_KEY_MGMT_NONE	0
352 #define RNDIS_WLAN_KEY_MGMT_802_1X	(1<<0)
353 #define RNDIS_WLAN_KEY_MGMT_PSK		(1<<1)
354 
355 #define COMMAND_BUFFER_SIZE	(CONTROL_BUFFER_SIZE + sizeof(struct rndis_set))
356 
357 static const struct ieee80211_channel rndis_channels[] = {
358 	{ .center_freq = 2412 },
359 	{ .center_freq = 2417 },
360 	{ .center_freq = 2422 },
361 	{ .center_freq = 2427 },
362 	{ .center_freq = 2432 },
363 	{ .center_freq = 2437 },
364 	{ .center_freq = 2442 },
365 	{ .center_freq = 2447 },
366 	{ .center_freq = 2452 },
367 	{ .center_freq = 2457 },
368 	{ .center_freq = 2462 },
369 	{ .center_freq = 2467 },
370 	{ .center_freq = 2472 },
371 	{ .center_freq = 2484 },
372 };
373 
374 static const struct ieee80211_rate rndis_rates[] = {
375 	{ .bitrate = 10 },
376 	{ .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
377 	{ .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
378 	{ .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
379 	{ .bitrate = 60 },
380 	{ .bitrate = 90 },
381 	{ .bitrate = 120 },
382 	{ .bitrate = 180 },
383 	{ .bitrate = 240 },
384 	{ .bitrate = 360 },
385 	{ .bitrate = 480 },
386 	{ .bitrate = 540 }
387 };
388 
389 static const u32 rndis_cipher_suites[] = {
390 	WLAN_CIPHER_SUITE_WEP40,
391 	WLAN_CIPHER_SUITE_WEP104,
392 	WLAN_CIPHER_SUITE_TKIP,
393 	WLAN_CIPHER_SUITE_CCMP,
394 };
395 
396 struct rndis_wlan_encr_key {
397 	int len;
398 	u32 cipher;
399 	u8 material[32];
400 	u8 bssid[ETH_ALEN];
401 	bool pairwise;
402 	bool tx_key;
403 };
404 
405 /* RNDIS device private data */
406 struct rndis_wlan_private {
407 	struct usbnet *usbdev;
408 
409 	struct wireless_dev wdev;
410 
411 	struct cfg80211_scan_request *scan_request;
412 
413 	struct workqueue_struct *workqueue;
414 	struct delayed_work dev_poller_work;
415 	struct delayed_work scan_work;
416 	struct work_struct work;
417 	struct mutex command_lock;
418 	unsigned long work_pending;
419 	int last_qual;
420 	s32 cqm_rssi_thold;
421 	u32 cqm_rssi_hyst;
422 	int last_cqm_event_rssi;
423 
424 	struct ieee80211_supported_band band;
425 	struct ieee80211_channel channels[ARRAY_SIZE(rndis_channels)];
426 	struct ieee80211_rate rates[ARRAY_SIZE(rndis_rates)];
427 	u32 cipher_suites[ARRAY_SIZE(rndis_cipher_suites)];
428 
429 	int device_type;
430 	int caps;
431 	int multicast_size;
432 
433 	/* module parameters */
434 	char param_country[4];
435 	int  param_frameburst;
436 	int  param_afterburner;
437 	int  param_power_save;
438 	int  param_power_output;
439 	int  param_roamtrigger;
440 	int  param_roamdelta;
441 	u32  param_workaround_interval;
442 
443 	/* hardware state */
444 	bool radio_on;
445 	int power_mode;
446 	int infra_mode;
447 	bool connected;
448 	u8 bssid[ETH_ALEN];
449 	u32 current_command_oid;
450 
451 	/* encryption stuff */
452 	u8 encr_tx_key_index;
453 	struct rndis_wlan_encr_key encr_keys[RNDIS_WLAN_NUM_KEYS];
454 	int  wpa_version;
455 
456 	u8 command_buffer[COMMAND_BUFFER_SIZE];
457 };
458 
459 /*
460  * cfg80211 ops
461  */
462 static int rndis_change_virtual_intf(struct wiphy *wiphy,
463 					struct net_device *dev,
464 					enum nl80211_iftype type,
465 					struct vif_params *params);
466 
467 static int rndis_scan(struct wiphy *wiphy,
468 			struct cfg80211_scan_request *request);
469 
470 static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed);
471 
472 static int rndis_set_tx_power(struct wiphy *wiphy,
473 			      struct wireless_dev *wdev,
474 			      enum nl80211_tx_power_setting type,
475 			      int mbm);
476 static int rndis_get_tx_power(struct wiphy *wiphy,
477 			      struct wireless_dev *wdev,
478 			      int *dbm);
479 
480 static int rndis_connect(struct wiphy *wiphy, struct net_device *dev,
481 				struct cfg80211_connect_params *sme);
482 
483 static int rndis_disconnect(struct wiphy *wiphy, struct net_device *dev,
484 				u16 reason_code);
485 
486 static int rndis_join_ibss(struct wiphy *wiphy, struct net_device *dev,
487 					struct cfg80211_ibss_params *params);
488 
489 static int rndis_leave_ibss(struct wiphy *wiphy, struct net_device *dev);
490 
491 static int rndis_add_key(struct wiphy *wiphy, struct net_device *netdev,
492 			 int link_id,  u8 key_index, bool pairwise,
493 			 const u8 *mac_addr, struct key_params *params);
494 
495 static int rndis_del_key(struct wiphy *wiphy, struct net_device *netdev,
496 			 int link_id, u8 key_index, bool pairwise,
497 			 const u8 *mac_addr);
498 
499 static int rndis_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
500 				 int link_id, u8 key_index, bool unicast,
501 				 bool multicast);
502 
503 static int rndis_get_station(struct wiphy *wiphy, struct net_device *dev,
504 			     const u8 *mac, struct station_info *sinfo);
505 
506 static int rndis_dump_station(struct wiphy *wiphy, struct net_device *dev,
507 			       int idx, u8 *mac, struct station_info *sinfo);
508 
509 static int rndis_set_pmksa(struct wiphy *wiphy, struct net_device *netdev,
510 				struct cfg80211_pmksa *pmksa);
511 
512 static int rndis_del_pmksa(struct wiphy *wiphy, struct net_device *netdev,
513 				struct cfg80211_pmksa *pmksa);
514 
515 static int rndis_flush_pmksa(struct wiphy *wiphy, struct net_device *netdev);
516 
517 static int rndis_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
518 				bool enabled, int timeout);
519 
520 static int rndis_set_cqm_rssi_config(struct wiphy *wiphy,
521 					struct net_device *dev,
522 					s32 rssi_thold, u32 rssi_hyst);
523 
524 static const struct cfg80211_ops rndis_config_ops = {
525 	.change_virtual_intf = rndis_change_virtual_intf,
526 	.scan = rndis_scan,
527 	.set_wiphy_params = rndis_set_wiphy_params,
528 	.set_tx_power = rndis_set_tx_power,
529 	.get_tx_power = rndis_get_tx_power,
530 	.connect = rndis_connect,
531 	.disconnect = rndis_disconnect,
532 	.join_ibss = rndis_join_ibss,
533 	.leave_ibss = rndis_leave_ibss,
534 	.add_key = rndis_add_key,
535 	.del_key = rndis_del_key,
536 	.set_default_key = rndis_set_default_key,
537 	.get_station = rndis_get_station,
538 	.dump_station = rndis_dump_station,
539 	.set_pmksa = rndis_set_pmksa,
540 	.del_pmksa = rndis_del_pmksa,
541 	.flush_pmksa = rndis_flush_pmksa,
542 	.set_power_mgmt = rndis_set_power_mgmt,
543 	.set_cqm_rssi_config = rndis_set_cqm_rssi_config,
544 };
545 
546 static void *rndis_wiphy_privid = &rndis_wiphy_privid;
547 
548 
get_rndis_wlan_priv(struct usbnet * dev)549 static struct rndis_wlan_private *get_rndis_wlan_priv(struct usbnet *dev)
550 {
551 	return (struct rndis_wlan_private *)dev->driver_priv;
552 }
553 
get_bcm4320_power_dbm(struct rndis_wlan_private * priv)554 static u32 get_bcm4320_power_dbm(struct rndis_wlan_private *priv)
555 {
556 	switch (priv->param_power_output) {
557 	default:
558 	case 3:
559 		return BCM4320_DEFAULT_TXPOWER_DBM_100;
560 	case 2:
561 		return BCM4320_DEFAULT_TXPOWER_DBM_75;
562 	case 1:
563 		return BCM4320_DEFAULT_TXPOWER_DBM_50;
564 	case 0:
565 		return BCM4320_DEFAULT_TXPOWER_DBM_25;
566 	}
567 }
568 
is_wpa_key(struct rndis_wlan_private * priv,u8 idx)569 static bool is_wpa_key(struct rndis_wlan_private *priv, u8 idx)
570 {
571 	int cipher = priv->encr_keys[idx].cipher;
572 
573 	return (cipher == WLAN_CIPHER_SUITE_CCMP ||
574 		cipher == WLAN_CIPHER_SUITE_TKIP);
575 }
576 
rndis_cipher_to_alg(u32 cipher)577 static int rndis_cipher_to_alg(u32 cipher)
578 {
579 	switch (cipher) {
580 	default:
581 		return RNDIS_WLAN_ALG_NONE;
582 	case WLAN_CIPHER_SUITE_WEP40:
583 	case WLAN_CIPHER_SUITE_WEP104:
584 		return RNDIS_WLAN_ALG_WEP;
585 	case WLAN_CIPHER_SUITE_TKIP:
586 		return RNDIS_WLAN_ALG_TKIP;
587 	case WLAN_CIPHER_SUITE_CCMP:
588 		return RNDIS_WLAN_ALG_CCMP;
589 	}
590 }
591 
rndis_akm_suite_to_key_mgmt(u32 akm_suite)592 static int rndis_akm_suite_to_key_mgmt(u32 akm_suite)
593 {
594 	switch (akm_suite) {
595 	default:
596 		return RNDIS_WLAN_KEY_MGMT_NONE;
597 	case WLAN_AKM_SUITE_8021X:
598 		return RNDIS_WLAN_KEY_MGMT_802_1X;
599 	case WLAN_AKM_SUITE_PSK:
600 		return RNDIS_WLAN_KEY_MGMT_PSK;
601 	}
602 }
603 
604 #ifdef DEBUG
oid_to_string(u32 oid)605 static const char *oid_to_string(u32 oid)
606 {
607 	switch (oid) {
608 #define OID_STR(oid) case oid: return(#oid)
609 		/* from rndis_host.h */
610 		OID_STR(RNDIS_OID_802_3_PERMANENT_ADDRESS);
611 		OID_STR(RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE);
612 		OID_STR(RNDIS_OID_GEN_CURRENT_PACKET_FILTER);
613 		OID_STR(RNDIS_OID_GEN_PHYSICAL_MEDIUM);
614 
615 		/* from rndis_wlan.c */
616 		OID_STR(RNDIS_OID_GEN_LINK_SPEED);
617 		OID_STR(RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER);
618 
619 		OID_STR(RNDIS_OID_GEN_XMIT_OK);
620 		OID_STR(RNDIS_OID_GEN_RCV_OK);
621 		OID_STR(RNDIS_OID_GEN_XMIT_ERROR);
622 		OID_STR(RNDIS_OID_GEN_RCV_ERROR);
623 		OID_STR(RNDIS_OID_GEN_RCV_NO_BUFFER);
624 
625 		OID_STR(RNDIS_OID_802_3_CURRENT_ADDRESS);
626 		OID_STR(RNDIS_OID_802_3_MULTICAST_LIST);
627 		OID_STR(RNDIS_OID_802_3_MAXIMUM_LIST_SIZE);
628 
629 		OID_STR(RNDIS_OID_802_11_BSSID);
630 		OID_STR(RNDIS_OID_802_11_SSID);
631 		OID_STR(RNDIS_OID_802_11_INFRASTRUCTURE_MODE);
632 		OID_STR(RNDIS_OID_802_11_ADD_WEP);
633 		OID_STR(RNDIS_OID_802_11_REMOVE_WEP);
634 		OID_STR(RNDIS_OID_802_11_DISASSOCIATE);
635 		OID_STR(RNDIS_OID_802_11_AUTHENTICATION_MODE);
636 		OID_STR(RNDIS_OID_802_11_PRIVACY_FILTER);
637 		OID_STR(RNDIS_OID_802_11_BSSID_LIST_SCAN);
638 		OID_STR(RNDIS_OID_802_11_ENCRYPTION_STATUS);
639 		OID_STR(RNDIS_OID_802_11_ADD_KEY);
640 		OID_STR(RNDIS_OID_802_11_REMOVE_KEY);
641 		OID_STR(RNDIS_OID_802_11_ASSOCIATION_INFORMATION);
642 		OID_STR(RNDIS_OID_802_11_CAPABILITY);
643 		OID_STR(RNDIS_OID_802_11_PMKID);
644 		OID_STR(RNDIS_OID_802_11_NETWORK_TYPES_SUPPORTED);
645 		OID_STR(RNDIS_OID_802_11_NETWORK_TYPE_IN_USE);
646 		OID_STR(RNDIS_OID_802_11_TX_POWER_LEVEL);
647 		OID_STR(RNDIS_OID_802_11_RSSI);
648 		OID_STR(RNDIS_OID_802_11_RSSI_TRIGGER);
649 		OID_STR(RNDIS_OID_802_11_FRAGMENTATION_THRESHOLD);
650 		OID_STR(RNDIS_OID_802_11_RTS_THRESHOLD);
651 		OID_STR(RNDIS_OID_802_11_SUPPORTED_RATES);
652 		OID_STR(RNDIS_OID_802_11_CONFIGURATION);
653 		OID_STR(RNDIS_OID_802_11_POWER_MODE);
654 		OID_STR(RNDIS_OID_802_11_BSSID_LIST);
655 #undef OID_STR
656 	}
657 
658 	return "?";
659 }
660 #else
oid_to_string(u32 oid)661 static const char *oid_to_string(u32 oid)
662 {
663 	return "?";
664 }
665 #endif
666 
667 /* translate error code */
rndis_error_status(__le32 rndis_status)668 static int rndis_error_status(__le32 rndis_status)
669 {
670 	int ret = -EINVAL;
671 	switch (le32_to_cpu(rndis_status)) {
672 	case RNDIS_STATUS_SUCCESS:
673 		ret = 0;
674 		break;
675 	case RNDIS_STATUS_FAILURE:
676 	case RNDIS_STATUS_INVALID_DATA:
677 		ret = -EINVAL;
678 		break;
679 	case RNDIS_STATUS_NOT_SUPPORTED:
680 		ret = -EOPNOTSUPP;
681 		break;
682 	case RNDIS_STATUS_ADAPTER_NOT_READY:
683 	case RNDIS_STATUS_ADAPTER_NOT_OPEN:
684 		ret = -EBUSY;
685 		break;
686 	}
687 	return ret;
688 }
689 
rndis_query_oid(struct usbnet * dev,u32 oid,void * data,int * len)690 static int rndis_query_oid(struct usbnet *dev, u32 oid, void *data, int *len)
691 {
692 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(dev);
693 	union {
694 		void			*buf;
695 		struct rndis_msg_hdr	*header;
696 		struct rndis_query	*get;
697 		struct rndis_query_c	*get_c;
698 	} u;
699 	int ret;
700 	size_t buflen, resplen, respoffs, copylen;
701 
702 	buflen = *len + sizeof(*u.get);
703 	if (buflen < CONTROL_BUFFER_SIZE)
704 		buflen = CONTROL_BUFFER_SIZE;
705 
706 	if (buflen > COMMAND_BUFFER_SIZE) {
707 		u.buf = kmalloc(buflen, GFP_KERNEL);
708 		if (!u.buf)
709 			return -ENOMEM;
710 	} else {
711 		u.buf = priv->command_buffer;
712 	}
713 
714 	mutex_lock(&priv->command_lock);
715 
716 	memset(u.get, 0, sizeof *u.get);
717 	u.get->msg_type = cpu_to_le32(RNDIS_MSG_QUERY);
718 	u.get->msg_len = cpu_to_le32(sizeof *u.get);
719 	u.get->oid = cpu_to_le32(oid);
720 
721 	priv->current_command_oid = oid;
722 	ret = rndis_command(dev, u.header, buflen);
723 	priv->current_command_oid = 0;
724 	if (ret < 0)
725 		netdev_dbg(dev->net, "%s(%s): rndis_command() failed, %d (%08x)\n",
726 			   __func__, oid_to_string(oid), ret,
727 			   le32_to_cpu(u.get_c->status));
728 
729 	if (ret == 0) {
730 		resplen = le32_to_cpu(u.get_c->len);
731 		respoffs = le32_to_cpu(u.get_c->offset) + 8;
732 
733 		if (respoffs > buflen) {
734 			/* Device returned data offset outside buffer, error. */
735 			netdev_dbg(dev->net,
736 				   "%s(%s): received invalid data offset: %zu > %zu\n",
737 				   __func__, oid_to_string(oid), respoffs, buflen);
738 
739 			ret = -EINVAL;
740 			goto exit_unlock;
741 		}
742 
743 		copylen = min(resplen, buflen - respoffs);
744 
745 		if (copylen > *len)
746 			copylen = *len;
747 
748 		memcpy(data, u.buf + respoffs, copylen);
749 
750 		*len = resplen;
751 
752 		ret = rndis_error_status(u.get_c->status);
753 		if (ret < 0)
754 			netdev_dbg(dev->net, "%s(%s): device returned error,  0x%08x (%d)\n",
755 				   __func__, oid_to_string(oid),
756 				   le32_to_cpu(u.get_c->status), ret);
757 	}
758 
759 exit_unlock:
760 	mutex_unlock(&priv->command_lock);
761 
762 	if (u.buf != priv->command_buffer)
763 		kfree(u.buf);
764 	return ret;
765 }
766 
rndis_set_oid(struct usbnet * dev,u32 oid,const void * data,int len)767 static int rndis_set_oid(struct usbnet *dev, u32 oid, const void *data,
768 			 int len)
769 {
770 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(dev);
771 	union {
772 		void			*buf;
773 		struct rndis_msg_hdr	*header;
774 		struct rndis_set	*set;
775 		struct rndis_set_c	*set_c;
776 	} u;
777 	int ret, buflen;
778 
779 	buflen = len + sizeof(*u.set);
780 	if (buflen < CONTROL_BUFFER_SIZE)
781 		buflen = CONTROL_BUFFER_SIZE;
782 
783 	if (buflen > COMMAND_BUFFER_SIZE) {
784 		u.buf = kmalloc(buflen, GFP_KERNEL);
785 		if (!u.buf)
786 			return -ENOMEM;
787 	} else {
788 		u.buf = priv->command_buffer;
789 	}
790 
791 	mutex_lock(&priv->command_lock);
792 
793 	memset(u.set, 0, sizeof *u.set);
794 	u.set->msg_type = cpu_to_le32(RNDIS_MSG_SET);
795 	u.set->msg_len = cpu_to_le32(sizeof(*u.set) + len);
796 	u.set->oid = cpu_to_le32(oid);
797 	u.set->len = cpu_to_le32(len);
798 	u.set->offset = cpu_to_le32(sizeof(*u.set) - 8);
799 	u.set->handle = cpu_to_le32(0);
800 	memcpy(u.buf + sizeof(*u.set), data, len);
801 
802 	priv->current_command_oid = oid;
803 	ret = rndis_command(dev, u.header, buflen);
804 	priv->current_command_oid = 0;
805 	if (ret < 0)
806 		netdev_dbg(dev->net, "%s(%s): rndis_command() failed, %d (%08x)\n",
807 			   __func__, oid_to_string(oid), ret,
808 			   le32_to_cpu(u.set_c->status));
809 
810 	if (ret == 0) {
811 		ret = rndis_error_status(u.set_c->status);
812 
813 		if (ret < 0)
814 			netdev_dbg(dev->net, "%s(%s): device returned error, 0x%08x (%d)\n",
815 				   __func__, oid_to_string(oid),
816 				   le32_to_cpu(u.set_c->status), ret);
817 	}
818 
819 	mutex_unlock(&priv->command_lock);
820 
821 	if (u.buf != priv->command_buffer)
822 		kfree(u.buf);
823 	return ret;
824 }
825 
rndis_reset(struct usbnet * usbdev)826 static int rndis_reset(struct usbnet *usbdev)
827 {
828 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
829 	struct rndis_reset *reset;
830 	int ret;
831 
832 	mutex_lock(&priv->command_lock);
833 
834 	reset = (void *)priv->command_buffer;
835 	memset(reset, 0, sizeof(*reset));
836 	reset->msg_type = cpu_to_le32(RNDIS_MSG_RESET);
837 	reset->msg_len = cpu_to_le32(sizeof(*reset));
838 	priv->current_command_oid = 0;
839 	ret = rndis_command(usbdev, (void *)reset, CONTROL_BUFFER_SIZE);
840 
841 	mutex_unlock(&priv->command_lock);
842 
843 	if (ret < 0)
844 		return ret;
845 	return 0;
846 }
847 
848 /*
849  * Specs say that we can only set config parameters only soon after device
850  * initialization.
851  *   value_type: 0 = u32, 2 = unicode string
852  */
rndis_set_config_parameter(struct usbnet * dev,char * param,int value_type,void * value)853 static int rndis_set_config_parameter(struct usbnet *dev, char *param,
854 						int value_type, void *value)
855 {
856 	struct ndis_config_param *infobuf;
857 	int value_len, info_len, param_len, ret, i;
858 	__le16 *unibuf;
859 	__le32 *dst_value;
860 
861 	if (value_type == 0)
862 		value_len = sizeof(__le32);
863 	else if (value_type == 2)
864 		value_len = strlen(value) * sizeof(__le16);
865 	else
866 		return -EINVAL;
867 
868 	param_len = strlen(param) * sizeof(__le16);
869 	info_len = sizeof(*infobuf) + param_len + value_len;
870 
871 #ifdef DEBUG
872 	info_len += 12;
873 #endif
874 	infobuf = kmalloc(info_len, GFP_KERNEL);
875 	if (!infobuf)
876 		return -ENOMEM;
877 
878 #ifdef DEBUG
879 	info_len -= 12;
880 	/* extra 12 bytes are for padding (debug output) */
881 	memset(infobuf, 0xCC, info_len + 12);
882 #endif
883 
884 	if (value_type == 2)
885 		netdev_dbg(dev->net, "setting config parameter: %s, value: %s\n",
886 			   param, (u8 *)value);
887 	else
888 		netdev_dbg(dev->net, "setting config parameter: %s, value: %d\n",
889 			   param, *(u32 *)value);
890 
891 	infobuf->name_offs = cpu_to_le32(sizeof(*infobuf));
892 	infobuf->name_length = cpu_to_le32(param_len);
893 	infobuf->type = cpu_to_le32(value_type);
894 	infobuf->value_offs = cpu_to_le32(sizeof(*infobuf) + param_len);
895 	infobuf->value_length = cpu_to_le32(value_len);
896 
897 	/* simple string to unicode string conversion */
898 	unibuf = (void *)infobuf + sizeof(*infobuf);
899 	for (i = 0; i < param_len / sizeof(__le16); i++)
900 		unibuf[i] = cpu_to_le16(param[i]);
901 
902 	if (value_type == 2) {
903 		unibuf = (void *)infobuf + sizeof(*infobuf) + param_len;
904 		for (i = 0; i < value_len / sizeof(__le16); i++)
905 			unibuf[i] = cpu_to_le16(((u8 *)value)[i]);
906 	} else {
907 		dst_value = (void *)infobuf + sizeof(*infobuf) + param_len;
908 		*dst_value = cpu_to_le32(*(u32 *)value);
909 	}
910 
911 #ifdef DEBUG
912 	netdev_dbg(dev->net, "info buffer (len: %d)\n", info_len);
913 	for (i = 0; i < info_len; i += 12) {
914 		u32 *tmp = (u32 *)((u8 *)infobuf + i);
915 		netdev_dbg(dev->net, "%08X:%08X:%08X\n",
916 			   cpu_to_be32(tmp[0]),
917 			   cpu_to_be32(tmp[1]),
918 			   cpu_to_be32(tmp[2]));
919 	}
920 #endif
921 
922 	ret = rndis_set_oid(dev, RNDIS_OID_GEN_RNDIS_CONFIG_PARAMETER,
923 							infobuf, info_len);
924 	if (ret != 0)
925 		netdev_dbg(dev->net, "setting rndis config parameter failed, %d\n",
926 			   ret);
927 
928 	kfree(infobuf);
929 	return ret;
930 }
931 
rndis_set_config_parameter_str(struct usbnet * dev,char * param,char * value)932 static int rndis_set_config_parameter_str(struct usbnet *dev,
933 						char *param, char *value)
934 {
935 	return rndis_set_config_parameter(dev, param, 2, value);
936 }
937 
938 /*
939  * data conversion functions
940  */
level_to_qual(int level)941 static int level_to_qual(int level)
942 {
943 	int qual = 100 * (level - WL_NOISE) / (WL_SIGMAX - WL_NOISE);
944 	return qual >= 0 ? (qual <= 100 ? qual : 100) : 0;
945 }
946 
947 /*
948  * common functions
949  */
950 static int set_infra_mode(struct usbnet *usbdev, int mode);
951 static void restore_keys(struct usbnet *usbdev);
952 static int rndis_check_bssid_list(struct usbnet *usbdev, u8 *match_bssid,
953 					bool *matched);
954 
rndis_start_bssid_list_scan(struct usbnet * usbdev)955 static int rndis_start_bssid_list_scan(struct usbnet *usbdev)
956 {
957 	__le32 tmp;
958 
959 	/* Note: RNDIS_OID_802_11_BSSID_LIST_SCAN clears internal BSS list. */
960 	tmp = cpu_to_le32(1);
961 	return rndis_set_oid(usbdev, RNDIS_OID_802_11_BSSID_LIST_SCAN, &tmp,
962 							sizeof(tmp));
963 }
964 
set_essid(struct usbnet * usbdev,struct ndis_80211_ssid * ssid)965 static int set_essid(struct usbnet *usbdev, struct ndis_80211_ssid *ssid)
966 {
967 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
968 	int ret;
969 
970 	ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_SSID,
971 			    ssid, sizeof(*ssid));
972 	if (ret < 0) {
973 		netdev_warn(usbdev->net, "setting SSID failed (%08X)\n", ret);
974 		return ret;
975 	}
976 	if (ret == 0) {
977 		priv->radio_on = true;
978 		netdev_dbg(usbdev->net, "%s(): radio_on = true\n", __func__);
979 	}
980 
981 	return ret;
982 }
983 
set_bssid(struct usbnet * usbdev,const u8 * bssid)984 static int set_bssid(struct usbnet *usbdev, const u8 *bssid)
985 {
986 	int ret;
987 
988 	ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_BSSID,
989 			    bssid, ETH_ALEN);
990 	if (ret < 0) {
991 		netdev_warn(usbdev->net, "setting BSSID[%pM] failed (%08X)\n",
992 			    bssid, ret);
993 		return ret;
994 	}
995 
996 	return ret;
997 }
998 
clear_bssid(struct usbnet * usbdev)999 static int clear_bssid(struct usbnet *usbdev)
1000 {
1001 	static const u8 broadcast_mac[ETH_ALEN] = {
1002 		0xff, 0xff, 0xff, 0xff, 0xff, 0xff
1003 	};
1004 
1005 	return set_bssid(usbdev, broadcast_mac);
1006 }
1007 
get_bssid(struct usbnet * usbdev,u8 bssid[ETH_ALEN])1008 static int get_bssid(struct usbnet *usbdev, u8 bssid[ETH_ALEN])
1009 {
1010 	int ret, len;
1011 
1012 	len = ETH_ALEN;
1013 	ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_BSSID,
1014 			      bssid, &len);
1015 
1016 	if (ret != 0)
1017 		eth_zero_addr(bssid);
1018 
1019 	return ret;
1020 }
1021 
get_association_info(struct usbnet * usbdev,struct ndis_80211_assoc_info * info,int len)1022 static int get_association_info(struct usbnet *usbdev,
1023 			struct ndis_80211_assoc_info *info, int len)
1024 {
1025 	return rndis_query_oid(usbdev,
1026 			RNDIS_OID_802_11_ASSOCIATION_INFORMATION,
1027 			info, &len);
1028 }
1029 
is_associated(struct usbnet * usbdev)1030 static bool is_associated(struct usbnet *usbdev)
1031 {
1032 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1033 	u8 bssid[ETH_ALEN];
1034 
1035 	if (!priv->radio_on)
1036 		return false;
1037 
1038 	return (get_bssid(usbdev, bssid) == 0 && !is_zero_ether_addr(bssid));
1039 }
1040 
disassociate(struct usbnet * usbdev,bool reset_ssid)1041 static int disassociate(struct usbnet *usbdev, bool reset_ssid)
1042 {
1043 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1044 	struct ndis_80211_ssid ssid;
1045 	int i, ret = 0;
1046 
1047 	if (priv->radio_on) {
1048 		ret = rndis_set_oid(usbdev,
1049 				RNDIS_OID_802_11_DISASSOCIATE,
1050 				NULL, 0);
1051 		if (ret == 0) {
1052 			priv->radio_on = false;
1053 			netdev_dbg(usbdev->net, "%s(): radio_on = false\n",
1054 				   __func__);
1055 
1056 			if (reset_ssid)
1057 				msleep(100);
1058 		}
1059 	}
1060 
1061 	/* disassociate causes radio to be turned off; if reset_ssid
1062 	 * is given, set random ssid to enable radio */
1063 	if (reset_ssid) {
1064 		/* Set device to infrastructure mode so we don't get ad-hoc
1065 		 * 'media connect' indications with the random ssid.
1066 		 */
1067 		set_infra_mode(usbdev, NDIS_80211_INFRA_INFRA);
1068 
1069 		ssid.length = cpu_to_le32(sizeof(ssid.essid));
1070 		get_random_bytes(&ssid.essid[2], sizeof(ssid.essid)-2);
1071 		ssid.essid[0] = 0x1;
1072 		ssid.essid[1] = 0xff;
1073 		for (i = 2; i < sizeof(ssid.essid); i++)
1074 			ssid.essid[i] = 0x1 + (ssid.essid[i] * 0xfe / 0xff);
1075 		ret = set_essid(usbdev, &ssid);
1076 	}
1077 	return ret;
1078 }
1079 
set_auth_mode(struct usbnet * usbdev,u32 wpa_version,enum nl80211_auth_type auth_type,int keymgmt)1080 static int set_auth_mode(struct usbnet *usbdev, u32 wpa_version,
1081 				enum nl80211_auth_type auth_type, int keymgmt)
1082 {
1083 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1084 	__le32 tmp;
1085 	int auth_mode, ret;
1086 
1087 	netdev_dbg(usbdev->net, "%s(): wpa_version=0x%x authalg=0x%x keymgmt=0x%x\n",
1088 		   __func__, wpa_version, auth_type, keymgmt);
1089 
1090 	if (wpa_version & NL80211_WPA_VERSION_2) {
1091 		if (keymgmt & RNDIS_WLAN_KEY_MGMT_802_1X)
1092 			auth_mode = NDIS_80211_AUTH_WPA2;
1093 		else
1094 			auth_mode = NDIS_80211_AUTH_WPA2_PSK;
1095 	} else if (wpa_version & NL80211_WPA_VERSION_1) {
1096 		if (keymgmt & RNDIS_WLAN_KEY_MGMT_802_1X)
1097 			auth_mode = NDIS_80211_AUTH_WPA;
1098 		else if (keymgmt & RNDIS_WLAN_KEY_MGMT_PSK)
1099 			auth_mode = NDIS_80211_AUTH_WPA_PSK;
1100 		else
1101 			auth_mode = NDIS_80211_AUTH_WPA_NONE;
1102 	} else if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
1103 		auth_mode = NDIS_80211_AUTH_SHARED;
1104 	else if (auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM)
1105 		auth_mode = NDIS_80211_AUTH_OPEN;
1106 	else if (auth_type == NL80211_AUTHTYPE_AUTOMATIC)
1107 		auth_mode = NDIS_80211_AUTH_AUTO_SWITCH;
1108 	else
1109 		return -ENOTSUPP;
1110 
1111 	tmp = cpu_to_le32(auth_mode);
1112 	ret = rndis_set_oid(usbdev,
1113 			    RNDIS_OID_802_11_AUTHENTICATION_MODE,
1114 			    &tmp, sizeof(tmp));
1115 	if (ret != 0) {
1116 		netdev_warn(usbdev->net, "setting auth mode failed (%08X)\n",
1117 			    ret);
1118 		return ret;
1119 	}
1120 
1121 	priv->wpa_version = wpa_version;
1122 
1123 	return 0;
1124 }
1125 
set_priv_filter(struct usbnet * usbdev)1126 static int set_priv_filter(struct usbnet *usbdev)
1127 {
1128 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1129 	__le32 tmp;
1130 
1131 	netdev_dbg(usbdev->net, "%s(): wpa_version=0x%x\n",
1132 		   __func__, priv->wpa_version);
1133 
1134 	if (priv->wpa_version & NL80211_WPA_VERSION_2 ||
1135 	    priv->wpa_version & NL80211_WPA_VERSION_1)
1136 		tmp = cpu_to_le32(NDIS_80211_PRIV_8021X_WEP);
1137 	else
1138 		tmp = cpu_to_le32(NDIS_80211_PRIV_ACCEPT_ALL);
1139 
1140 	return rndis_set_oid(usbdev,
1141 			     RNDIS_OID_802_11_PRIVACY_FILTER, &tmp,
1142 			     sizeof(tmp));
1143 }
1144 
set_encr_mode(struct usbnet * usbdev,int pairwise,int groupwise)1145 static int set_encr_mode(struct usbnet *usbdev, int pairwise, int groupwise)
1146 {
1147 	__le32 tmp;
1148 	int encr_mode, ret;
1149 
1150 	netdev_dbg(usbdev->net, "%s(): cipher_pair=0x%x cipher_group=0x%x\n",
1151 		   __func__, pairwise, groupwise);
1152 
1153 	if (pairwise & RNDIS_WLAN_ALG_CCMP)
1154 		encr_mode = NDIS_80211_ENCR_CCMP_ENABLED;
1155 	else if (pairwise & RNDIS_WLAN_ALG_TKIP)
1156 		encr_mode = NDIS_80211_ENCR_TKIP_ENABLED;
1157 	else if (pairwise & RNDIS_WLAN_ALG_WEP)
1158 		encr_mode = NDIS_80211_ENCR_WEP_ENABLED;
1159 	else if (groupwise & RNDIS_WLAN_ALG_CCMP)
1160 		encr_mode = NDIS_80211_ENCR_CCMP_ENABLED;
1161 	else if (groupwise & RNDIS_WLAN_ALG_TKIP)
1162 		encr_mode = NDIS_80211_ENCR_TKIP_ENABLED;
1163 	else
1164 		encr_mode = NDIS_80211_ENCR_DISABLED;
1165 
1166 	tmp = cpu_to_le32(encr_mode);
1167 	ret = rndis_set_oid(usbdev,
1168 			RNDIS_OID_802_11_ENCRYPTION_STATUS, &tmp,
1169 			sizeof(tmp));
1170 	if (ret != 0) {
1171 		netdev_warn(usbdev->net, "setting encr mode failed (%08X)\n",
1172 			    ret);
1173 		return ret;
1174 	}
1175 
1176 	return 0;
1177 }
1178 
set_infra_mode(struct usbnet * usbdev,int mode)1179 static int set_infra_mode(struct usbnet *usbdev, int mode)
1180 {
1181 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1182 	__le32 tmp;
1183 	int ret;
1184 
1185 	netdev_dbg(usbdev->net, "%s(): infra_mode=0x%x\n",
1186 		   __func__, priv->infra_mode);
1187 
1188 	tmp = cpu_to_le32(mode);
1189 	ret = rndis_set_oid(usbdev,
1190 			    RNDIS_OID_802_11_INFRASTRUCTURE_MODE,
1191 			    &tmp, sizeof(tmp));
1192 	if (ret != 0) {
1193 		netdev_warn(usbdev->net, "setting infra mode failed (%08X)\n",
1194 			    ret);
1195 		return ret;
1196 	}
1197 
1198 	/* NDIS drivers clear keys when infrastructure mode is
1199 	 * changed. But Linux tools assume otherwise. So set the
1200 	 * keys */
1201 	restore_keys(usbdev);
1202 
1203 	priv->infra_mode = mode;
1204 	return 0;
1205 }
1206 
set_rts_threshold(struct usbnet * usbdev,u32 rts_threshold)1207 static int set_rts_threshold(struct usbnet *usbdev, u32 rts_threshold)
1208 {
1209 	__le32 tmp;
1210 
1211 	netdev_dbg(usbdev->net, "%s(): %i\n", __func__, rts_threshold);
1212 
1213 	if (rts_threshold == -1 || rts_threshold > 2347)
1214 		rts_threshold = 2347;
1215 
1216 	tmp = cpu_to_le32(rts_threshold);
1217 	return rndis_set_oid(usbdev,
1218 			     RNDIS_OID_802_11_RTS_THRESHOLD,
1219 			     &tmp, sizeof(tmp));
1220 }
1221 
set_frag_threshold(struct usbnet * usbdev,u32 frag_threshold)1222 static int set_frag_threshold(struct usbnet *usbdev, u32 frag_threshold)
1223 {
1224 	__le32 tmp;
1225 
1226 	netdev_dbg(usbdev->net, "%s(): %i\n", __func__, frag_threshold);
1227 
1228 	if (frag_threshold < 256 || frag_threshold > 2346)
1229 		frag_threshold = 2346;
1230 
1231 	tmp = cpu_to_le32(frag_threshold);
1232 	return rndis_set_oid(usbdev,
1233 			RNDIS_OID_802_11_FRAGMENTATION_THRESHOLD,
1234 			&tmp, sizeof(tmp));
1235 }
1236 
set_default_iw_params(struct usbnet * usbdev)1237 static void set_default_iw_params(struct usbnet *usbdev)
1238 {
1239 	set_infra_mode(usbdev, NDIS_80211_INFRA_INFRA);
1240 	set_auth_mode(usbdev, 0, NL80211_AUTHTYPE_OPEN_SYSTEM,
1241 						RNDIS_WLAN_KEY_MGMT_NONE);
1242 	set_priv_filter(usbdev);
1243 	set_encr_mode(usbdev, RNDIS_WLAN_ALG_NONE, RNDIS_WLAN_ALG_NONE);
1244 }
1245 
deauthenticate(struct usbnet * usbdev)1246 static int deauthenticate(struct usbnet *usbdev)
1247 {
1248 	int ret;
1249 
1250 	ret = disassociate(usbdev, true);
1251 	set_default_iw_params(usbdev);
1252 	return ret;
1253 }
1254 
set_channel(struct usbnet * usbdev,int channel)1255 static int set_channel(struct usbnet *usbdev, int channel)
1256 {
1257 	struct ndis_80211_conf config;
1258 	unsigned int dsconfig;
1259 	int len, ret;
1260 
1261 	netdev_dbg(usbdev->net, "%s(%d)\n", __func__, channel);
1262 
1263 	/* this OID is valid only when not associated */
1264 	if (is_associated(usbdev))
1265 		return 0;
1266 
1267 	dsconfig = 1000 *
1268 		ieee80211_channel_to_frequency(channel, NL80211_BAND_2GHZ);
1269 
1270 	len = sizeof(config);
1271 	ret = rndis_query_oid(usbdev,
1272 			RNDIS_OID_802_11_CONFIGURATION,
1273 			&config, &len);
1274 	if (ret < 0) {
1275 		netdev_dbg(usbdev->net, "%s(): querying configuration failed\n",
1276 			   __func__);
1277 		return ret;
1278 	}
1279 
1280 	config.ds_config = cpu_to_le32(dsconfig);
1281 	ret = rndis_set_oid(usbdev,
1282 			RNDIS_OID_802_11_CONFIGURATION,
1283 			&config, sizeof(config));
1284 
1285 	netdev_dbg(usbdev->net, "%s(): %d -> %d\n", __func__, channel, ret);
1286 
1287 	return ret;
1288 }
1289 
get_current_channel(struct usbnet * usbdev,u32 * beacon_period)1290 static struct ieee80211_channel *get_current_channel(struct usbnet *usbdev,
1291 						     u32 *beacon_period)
1292 {
1293 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1294 	struct ieee80211_channel *channel;
1295 	struct ndis_80211_conf config;
1296 	int len, ret;
1297 
1298 	/* Get channel and beacon interval */
1299 	len = sizeof(config);
1300 	ret = rndis_query_oid(usbdev,
1301 			RNDIS_OID_802_11_CONFIGURATION,
1302 			&config, &len);
1303 	netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_CONFIGURATION -> %d\n",
1304 				__func__, ret);
1305 	if (ret < 0)
1306 		return NULL;
1307 
1308 	channel = ieee80211_get_channel(priv->wdev.wiphy,
1309 				KHZ_TO_MHZ(le32_to_cpu(config.ds_config)));
1310 	if (!channel)
1311 		return NULL;
1312 
1313 	if (beacon_period)
1314 		*beacon_period = le32_to_cpu(config.beacon_period);
1315 	return channel;
1316 }
1317 
1318 /* index must be 0 - N, as per NDIS  */
add_wep_key(struct usbnet * usbdev,const u8 * key,int key_len,u8 index)1319 static int add_wep_key(struct usbnet *usbdev, const u8 *key, int key_len,
1320 								u8 index)
1321 {
1322 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1323 	struct ndis_80211_wep_key ndis_key;
1324 	u32 cipher;
1325 	int ret;
1326 
1327 	netdev_dbg(usbdev->net, "%s(idx: %d, len: %d)\n",
1328 		   __func__, index, key_len);
1329 
1330 	if (index >= RNDIS_WLAN_NUM_KEYS)
1331 		return -EINVAL;
1332 
1333 	if (key_len == 5)
1334 		cipher = WLAN_CIPHER_SUITE_WEP40;
1335 	else if (key_len == 13)
1336 		cipher = WLAN_CIPHER_SUITE_WEP104;
1337 	else
1338 		return -EINVAL;
1339 
1340 	memset(&ndis_key, 0, sizeof(ndis_key));
1341 
1342 	ndis_key.size = cpu_to_le32(sizeof(ndis_key));
1343 	ndis_key.length = cpu_to_le32(key_len);
1344 	ndis_key.index = cpu_to_le32(index);
1345 	memcpy(&ndis_key.material, key, key_len);
1346 
1347 	if (index == priv->encr_tx_key_index) {
1348 		ndis_key.index |= NDIS_80211_ADDWEP_TRANSMIT_KEY;
1349 		ret = set_encr_mode(usbdev, RNDIS_WLAN_ALG_WEP,
1350 							RNDIS_WLAN_ALG_NONE);
1351 		if (ret)
1352 			netdev_warn(usbdev->net, "encryption couldn't be enabled (%08X)\n",
1353 				    ret);
1354 	}
1355 
1356 	ret = rndis_set_oid(usbdev,
1357 			RNDIS_OID_802_11_ADD_WEP, &ndis_key,
1358 			sizeof(ndis_key));
1359 	if (ret != 0) {
1360 		netdev_warn(usbdev->net, "adding encryption key %d failed (%08X)\n",
1361 			    index + 1, ret);
1362 		return ret;
1363 	}
1364 
1365 	priv->encr_keys[index].len = key_len;
1366 	priv->encr_keys[index].cipher = cipher;
1367 	memcpy(&priv->encr_keys[index].material, key, key_len);
1368 	eth_broadcast_addr(priv->encr_keys[index].bssid);
1369 
1370 	return 0;
1371 }
1372 
add_wpa_key(struct usbnet * usbdev,const u8 * key,int key_len,u8 index,const u8 * addr,const u8 * rx_seq,int seq_len,u32 cipher,__le32 flags)1373 static int add_wpa_key(struct usbnet *usbdev, const u8 *key, int key_len,
1374 			u8 index, const u8 *addr, const u8 *rx_seq,
1375 			int seq_len, u32 cipher, __le32 flags)
1376 {
1377 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1378 	struct ndis_80211_key ndis_key;
1379 	bool is_addr_ok;
1380 	int ret;
1381 
1382 	if (index >= RNDIS_WLAN_NUM_KEYS) {
1383 		netdev_dbg(usbdev->net, "%s(): index out of range (%i)\n",
1384 			   __func__, index);
1385 		return -EINVAL;
1386 	}
1387 	if (key_len > sizeof(ndis_key.material) || key_len < 0) {
1388 		netdev_dbg(usbdev->net, "%s(): key length out of range (%i)\n",
1389 			   __func__, key_len);
1390 		return -EINVAL;
1391 	}
1392 	if (flags & NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ) {
1393 		if (!rx_seq || seq_len <= 0) {
1394 			netdev_dbg(usbdev->net, "%s(): recv seq flag without buffer\n",
1395 				   __func__);
1396 			return -EINVAL;
1397 		}
1398 		if (rx_seq && seq_len > sizeof(ndis_key.rsc)) {
1399 			netdev_dbg(usbdev->net, "%s(): too big recv seq buffer\n", __func__);
1400 			return -EINVAL;
1401 		}
1402 	}
1403 
1404 	is_addr_ok = addr && !is_zero_ether_addr(addr) &&
1405 					!is_broadcast_ether_addr(addr);
1406 	if ((flags & NDIS_80211_ADDKEY_PAIRWISE_KEY) && !is_addr_ok) {
1407 		netdev_dbg(usbdev->net, "%s(): pairwise but bssid invalid (%pM)\n",
1408 			   __func__, addr);
1409 		return -EINVAL;
1410 	}
1411 
1412 	netdev_dbg(usbdev->net, "%s(%i): flags:%i%i%i\n",
1413 		   __func__, index,
1414 		   !!(flags & NDIS_80211_ADDKEY_TRANSMIT_KEY),
1415 		   !!(flags & NDIS_80211_ADDKEY_PAIRWISE_KEY),
1416 		   !!(flags & NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ));
1417 
1418 	memset(&ndis_key, 0, sizeof(ndis_key));
1419 
1420 	ndis_key.size = cpu_to_le32(sizeof(ndis_key) -
1421 				sizeof(ndis_key.material) + key_len);
1422 	ndis_key.length = cpu_to_le32(key_len);
1423 	ndis_key.index = cpu_to_le32(index) | flags;
1424 
1425 	if (cipher == WLAN_CIPHER_SUITE_TKIP && key_len == 32) {
1426 		/* wpa_supplicant gives us the Michael MIC RX/TX keys in
1427 		 * different order than NDIS spec, so swap the order here. */
1428 		memcpy(ndis_key.material, key, 16);
1429 		memcpy(ndis_key.material + 16, key + 24, 8);
1430 		memcpy(ndis_key.material + 24, key + 16, 8);
1431 	} else
1432 		memcpy(ndis_key.material, key, key_len);
1433 
1434 	if (flags & NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ)
1435 		memcpy(ndis_key.rsc, rx_seq, seq_len);
1436 
1437 	if (flags & NDIS_80211_ADDKEY_PAIRWISE_KEY) {
1438 		/* pairwise key */
1439 		memcpy(ndis_key.bssid, addr, ETH_ALEN);
1440 	} else {
1441 		/* group key */
1442 		if (priv->infra_mode == NDIS_80211_INFRA_ADHOC)
1443 			eth_broadcast_addr(ndis_key.bssid);
1444 		else
1445 			get_bssid(usbdev, ndis_key.bssid);
1446 	}
1447 
1448 	ret = rndis_set_oid(usbdev,
1449 			RNDIS_OID_802_11_ADD_KEY, &ndis_key,
1450 			le32_to_cpu(ndis_key.size));
1451 	netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_ADD_KEY -> %08X\n",
1452 		   __func__, ret);
1453 	if (ret != 0)
1454 		return ret;
1455 
1456 	memset(&priv->encr_keys[index], 0, sizeof(priv->encr_keys[index]));
1457 	priv->encr_keys[index].len = key_len;
1458 	priv->encr_keys[index].cipher = cipher;
1459 	memcpy(&priv->encr_keys[index].material, key, key_len);
1460 	if (flags & NDIS_80211_ADDKEY_PAIRWISE_KEY)
1461 		memcpy(&priv->encr_keys[index].bssid, ndis_key.bssid, ETH_ALEN);
1462 	else
1463 		eth_broadcast_addr(priv->encr_keys[index].bssid);
1464 
1465 	if (flags & NDIS_80211_ADDKEY_TRANSMIT_KEY)
1466 		priv->encr_tx_key_index = index;
1467 
1468 	return 0;
1469 }
1470 
restore_key(struct usbnet * usbdev,u8 key_idx)1471 static int restore_key(struct usbnet *usbdev, u8 key_idx)
1472 {
1473 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1474 	struct rndis_wlan_encr_key key;
1475 
1476 	if (is_wpa_key(priv, key_idx))
1477 		return 0;
1478 
1479 	key = priv->encr_keys[key_idx];
1480 
1481 	netdev_dbg(usbdev->net, "%s(): %i:%i\n", __func__, key_idx, key.len);
1482 
1483 	if (key.len == 0)
1484 		return 0;
1485 
1486 	return add_wep_key(usbdev, key.material, key.len, key_idx);
1487 }
1488 
restore_keys(struct usbnet * usbdev)1489 static void restore_keys(struct usbnet *usbdev)
1490 {
1491 	int i;
1492 
1493 	for (i = 0; i < 4; i++)
1494 		restore_key(usbdev, i);
1495 }
1496 
clear_key(struct rndis_wlan_private * priv,u8 idx)1497 static void clear_key(struct rndis_wlan_private *priv, u8 idx)
1498 {
1499 	memset(&priv->encr_keys[idx], 0, sizeof(priv->encr_keys[idx]));
1500 }
1501 
1502 /* remove_key is for both wep and wpa */
remove_key(struct usbnet * usbdev,u8 index,const u8 * bssid)1503 static int remove_key(struct usbnet *usbdev, u8 index, const u8 *bssid)
1504 {
1505 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1506 	struct ndis_80211_remove_key remove_key;
1507 	__le32 keyindex;
1508 	bool is_wpa;
1509 	int ret;
1510 
1511 	if (index >= RNDIS_WLAN_NUM_KEYS)
1512 		return -ENOENT;
1513 
1514 	if (priv->encr_keys[index].len == 0)
1515 		return 0;
1516 
1517 	is_wpa = is_wpa_key(priv, index);
1518 
1519 	netdev_dbg(usbdev->net, "%s(): %i:%s:%i\n",
1520 		   __func__, index, is_wpa ? "wpa" : "wep",
1521 		   priv->encr_keys[index].len);
1522 
1523 	clear_key(priv, index);
1524 
1525 	if (is_wpa) {
1526 		remove_key.size = cpu_to_le32(sizeof(remove_key));
1527 		remove_key.index = cpu_to_le32(index);
1528 		if (bssid) {
1529 			/* pairwise key */
1530 			if (!is_broadcast_ether_addr(bssid))
1531 				remove_key.index |=
1532 					NDIS_80211_ADDKEY_PAIRWISE_KEY;
1533 			memcpy(remove_key.bssid, bssid,
1534 					sizeof(remove_key.bssid));
1535 		} else
1536 			memset(remove_key.bssid, 0xff,
1537 						sizeof(remove_key.bssid));
1538 
1539 		ret = rndis_set_oid(usbdev,
1540 				RNDIS_OID_802_11_REMOVE_KEY,
1541 				&remove_key, sizeof(remove_key));
1542 		if (ret != 0)
1543 			return ret;
1544 	} else {
1545 		keyindex = cpu_to_le32(index);
1546 		ret = rndis_set_oid(usbdev,
1547 				RNDIS_OID_802_11_REMOVE_WEP,
1548 				&keyindex, sizeof(keyindex));
1549 		if (ret != 0) {
1550 			netdev_warn(usbdev->net,
1551 				    "removing encryption key %d failed (%08X)\n",
1552 				    index, ret);
1553 			return ret;
1554 		}
1555 	}
1556 
1557 	/* if it is transmit key, disable encryption */
1558 	if (index == priv->encr_tx_key_index)
1559 		set_encr_mode(usbdev, RNDIS_WLAN_ALG_NONE, RNDIS_WLAN_ALG_NONE);
1560 
1561 	return 0;
1562 }
1563 
set_multicast_list(struct usbnet * usbdev)1564 static void set_multicast_list(struct usbnet *usbdev)
1565 {
1566 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1567 	struct netdev_hw_addr *ha;
1568 	__le32 filter, basefilter;
1569 	int ret;
1570 	char *mc_addrs = NULL;
1571 	int mc_count;
1572 
1573 	basefilter = filter = cpu_to_le32(RNDIS_PACKET_TYPE_DIRECTED |
1574 					  RNDIS_PACKET_TYPE_BROADCAST);
1575 
1576 	if (usbdev->net->flags & IFF_PROMISC) {
1577 		filter |= cpu_to_le32(RNDIS_PACKET_TYPE_PROMISCUOUS |
1578 				      RNDIS_PACKET_TYPE_ALL_LOCAL);
1579 	} else if (usbdev->net->flags & IFF_ALLMULTI) {
1580 		filter |= cpu_to_le32(RNDIS_PACKET_TYPE_ALL_MULTICAST);
1581 	}
1582 
1583 	if (filter != basefilter)
1584 		goto set_filter;
1585 
1586 	/*
1587 	 * mc_list should be accessed holding the lock, so copy addresses to
1588 	 * local buffer first.
1589 	 */
1590 	netif_addr_lock_bh(usbdev->net);
1591 	mc_count = netdev_mc_count(usbdev->net);
1592 	if (mc_count > priv->multicast_size) {
1593 		filter |= cpu_to_le32(RNDIS_PACKET_TYPE_ALL_MULTICAST);
1594 	} else if (mc_count) {
1595 		int i = 0;
1596 
1597 		mc_addrs = kmalloc_array(mc_count, ETH_ALEN, GFP_ATOMIC);
1598 		if (!mc_addrs) {
1599 			netif_addr_unlock_bh(usbdev->net);
1600 			return;
1601 		}
1602 
1603 		netdev_for_each_mc_addr(ha, usbdev->net)
1604 			memcpy(mc_addrs + i++ * ETH_ALEN,
1605 			       ha->addr, ETH_ALEN);
1606 	}
1607 	netif_addr_unlock_bh(usbdev->net);
1608 
1609 	if (filter != basefilter)
1610 		goto set_filter;
1611 
1612 	if (mc_count) {
1613 		ret = rndis_set_oid(usbdev,
1614 				RNDIS_OID_802_3_MULTICAST_LIST,
1615 				mc_addrs, mc_count * ETH_ALEN);
1616 		kfree(mc_addrs);
1617 		if (ret == 0)
1618 			filter |= cpu_to_le32(RNDIS_PACKET_TYPE_MULTICAST);
1619 		else
1620 			filter |= cpu_to_le32(RNDIS_PACKET_TYPE_ALL_MULTICAST);
1621 
1622 		netdev_dbg(usbdev->net, "RNDIS_OID_802_3_MULTICAST_LIST(%d, max: %d) -> %d\n",
1623 			   mc_count, priv->multicast_size, ret);
1624 	}
1625 
1626 set_filter:
1627 	ret = rndis_set_oid(usbdev, RNDIS_OID_GEN_CURRENT_PACKET_FILTER, &filter,
1628 							sizeof(filter));
1629 	if (ret < 0) {
1630 		netdev_warn(usbdev->net, "couldn't set packet filter: %08x\n",
1631 			    le32_to_cpu(filter));
1632 	}
1633 
1634 	netdev_dbg(usbdev->net, "RNDIS_OID_GEN_CURRENT_PACKET_FILTER(%08x) -> %d\n",
1635 		   le32_to_cpu(filter), ret);
1636 }
1637 
1638 #ifdef DEBUG
debug_print_pmkids(struct usbnet * usbdev,struct ndis_80211_pmkid * pmkids,const char * func_str)1639 static void debug_print_pmkids(struct usbnet *usbdev,
1640 				struct ndis_80211_pmkid *pmkids,
1641 				const char *func_str)
1642 {
1643 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1644 	int i, len, count, max_pmkids, entry_len;
1645 
1646 	max_pmkids = priv->wdev.wiphy->max_num_pmkids;
1647 	len = le32_to_cpu(pmkids->length);
1648 	count = le32_to_cpu(pmkids->bssid_info_count);
1649 
1650 	entry_len = (count > 0) ? (len - sizeof(*pmkids)) / count : -1;
1651 
1652 	netdev_dbg(usbdev->net, "%s(): %d PMKIDs (data len: %d, entry len: "
1653 				"%d)\n", func_str, count, len, entry_len);
1654 
1655 	if (count > max_pmkids)
1656 		count = max_pmkids;
1657 
1658 	for (i = 0; i < count; i++) {
1659 		u32 *tmp = (u32 *)pmkids->bssid_info[i].pmkid;
1660 
1661 		netdev_dbg(usbdev->net, "%s():  bssid: %pM, "
1662 				"pmkid: %08X:%08X:%08X:%08X\n",
1663 				func_str, pmkids->bssid_info[i].bssid,
1664 				cpu_to_be32(tmp[0]), cpu_to_be32(tmp[1]),
1665 				cpu_to_be32(tmp[2]), cpu_to_be32(tmp[3]));
1666 	}
1667 }
1668 #else
debug_print_pmkids(struct usbnet * usbdev,struct ndis_80211_pmkid * pmkids,const char * func_str)1669 static void debug_print_pmkids(struct usbnet *usbdev,
1670 				struct ndis_80211_pmkid *pmkids,
1671 				const char *func_str)
1672 {
1673 	return;
1674 }
1675 #endif
1676 
get_device_pmkids(struct usbnet * usbdev)1677 static struct ndis_80211_pmkid *get_device_pmkids(struct usbnet *usbdev)
1678 {
1679 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1680 	struct ndis_80211_pmkid *pmkids;
1681 	int len, ret, max_pmkids;
1682 
1683 	max_pmkids = priv->wdev.wiphy->max_num_pmkids;
1684 	len = struct_size(pmkids, bssid_info, max_pmkids);
1685 
1686 	pmkids = kzalloc(len, GFP_KERNEL);
1687 	if (!pmkids)
1688 		return ERR_PTR(-ENOMEM);
1689 
1690 	pmkids->length = cpu_to_le32(len);
1691 	pmkids->bssid_info_count = cpu_to_le32(max_pmkids);
1692 
1693 	ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_PMKID,
1694 			pmkids, &len);
1695 	if (ret < 0) {
1696 		netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_PMKID(%d, %d)"
1697 				" -> %d\n", __func__, len, max_pmkids, ret);
1698 
1699 		kfree(pmkids);
1700 		return ERR_PTR(ret);
1701 	}
1702 
1703 	if (le32_to_cpu(pmkids->bssid_info_count) > max_pmkids)
1704 		pmkids->bssid_info_count = cpu_to_le32(max_pmkids);
1705 
1706 	debug_print_pmkids(usbdev, pmkids, __func__);
1707 
1708 	return pmkids;
1709 }
1710 
set_device_pmkids(struct usbnet * usbdev,struct ndis_80211_pmkid * pmkids)1711 static int set_device_pmkids(struct usbnet *usbdev,
1712 				struct ndis_80211_pmkid *pmkids)
1713 {
1714 	int ret, len, num_pmkids;
1715 
1716 	num_pmkids = le32_to_cpu(pmkids->bssid_info_count);
1717 	len = struct_size(pmkids, bssid_info, num_pmkids);
1718 	pmkids->length = cpu_to_le32(len);
1719 
1720 	debug_print_pmkids(usbdev, pmkids, __func__);
1721 
1722 	ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_PMKID, pmkids,
1723 			    le32_to_cpu(pmkids->length));
1724 	if (ret < 0) {
1725 		netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_PMKID(%d, %d) -> %d"
1726 				"\n", __func__, len, num_pmkids, ret);
1727 	}
1728 
1729 	kfree(pmkids);
1730 	return ret;
1731 }
1732 
remove_pmkid(struct usbnet * usbdev,struct ndis_80211_pmkid * pmkids,struct cfg80211_pmksa * pmksa,int max_pmkids)1733 static struct ndis_80211_pmkid *remove_pmkid(struct usbnet *usbdev,
1734 						struct ndis_80211_pmkid *pmkids,
1735 						struct cfg80211_pmksa *pmksa,
1736 						int max_pmkids)
1737 {
1738 	int i, err;
1739 	unsigned int count;
1740 
1741 	count = le32_to_cpu(pmkids->bssid_info_count);
1742 
1743 	if (count > max_pmkids)
1744 		count = max_pmkids;
1745 
1746 	for (i = 0; i < count; i++)
1747 		if (ether_addr_equal(pmkids->bssid_info[i].bssid,
1748 				     pmksa->bssid))
1749 			break;
1750 
1751 	/* pmkid not found */
1752 	if (i == count) {
1753 		netdev_dbg(usbdev->net, "%s(): bssid not found (%pM)\n",
1754 					__func__, pmksa->bssid);
1755 		err = -ENOENT;
1756 		goto error;
1757 	}
1758 
1759 	for (; i + 1 < count; i++)
1760 		pmkids->bssid_info[i] = pmkids->bssid_info[i + 1];
1761 
1762 	count--;
1763 	pmkids->length = cpu_to_le32(struct_size(pmkids, bssid_info, count));
1764 	pmkids->bssid_info_count = cpu_to_le32(count);
1765 
1766 	return pmkids;
1767 error:
1768 	kfree(pmkids);
1769 	return ERR_PTR(err);
1770 }
1771 
update_pmkid(struct usbnet * usbdev,struct ndis_80211_pmkid * pmkids,struct cfg80211_pmksa * pmksa,int max_pmkids)1772 static struct ndis_80211_pmkid *update_pmkid(struct usbnet *usbdev,
1773 						struct ndis_80211_pmkid *pmkids,
1774 						struct cfg80211_pmksa *pmksa,
1775 						int max_pmkids)
1776 {
1777 	struct ndis_80211_pmkid *new_pmkids;
1778 	int i, err, newlen;
1779 	unsigned int count;
1780 
1781 	count = le32_to_cpu(pmkids->bssid_info_count);
1782 
1783 	if (count > max_pmkids)
1784 		count = max_pmkids;
1785 
1786 	/* update with new pmkid */
1787 	for (i = 0; i < count; i++) {
1788 		if (!ether_addr_equal(pmkids->bssid_info[i].bssid,
1789 				      pmksa->bssid))
1790 			continue;
1791 
1792 		memcpy(pmkids->bssid_info[i].pmkid, pmksa->pmkid,
1793 								WLAN_PMKID_LEN);
1794 
1795 		return pmkids;
1796 	}
1797 
1798 	/* out of space, return error */
1799 	if (i == max_pmkids) {
1800 		netdev_dbg(usbdev->net, "%s(): out of space\n", __func__);
1801 		err = -ENOSPC;
1802 		goto error;
1803 	}
1804 
1805 	/* add new pmkid */
1806 	newlen = struct_size(pmkids, bssid_info, count + 1);
1807 
1808 	new_pmkids = krealloc(pmkids, newlen, GFP_KERNEL);
1809 	if (!new_pmkids) {
1810 		err = -ENOMEM;
1811 		goto error;
1812 	}
1813 	pmkids = new_pmkids;
1814 
1815 	pmkids->length = cpu_to_le32(newlen);
1816 	pmkids->bssid_info_count = cpu_to_le32(count + 1);
1817 
1818 	memcpy(pmkids->bssid_info[count].bssid, pmksa->bssid, ETH_ALEN);
1819 	memcpy(pmkids->bssid_info[count].pmkid, pmksa->pmkid, WLAN_PMKID_LEN);
1820 
1821 	return pmkids;
1822 error:
1823 	kfree(pmkids);
1824 	return ERR_PTR(err);
1825 }
1826 
1827 /*
1828  * cfg80211 ops
1829  */
rndis_change_virtual_intf(struct wiphy * wiphy,struct net_device * dev,enum nl80211_iftype type,struct vif_params * params)1830 static int rndis_change_virtual_intf(struct wiphy *wiphy,
1831 					struct net_device *dev,
1832 					enum nl80211_iftype type,
1833 					struct vif_params *params)
1834 {
1835 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1836 	struct usbnet *usbdev = priv->usbdev;
1837 	int mode;
1838 
1839 	switch (type) {
1840 	case NL80211_IFTYPE_ADHOC:
1841 		mode = NDIS_80211_INFRA_ADHOC;
1842 		break;
1843 	case NL80211_IFTYPE_STATION:
1844 		mode = NDIS_80211_INFRA_INFRA;
1845 		break;
1846 	default:
1847 		return -EINVAL;
1848 	}
1849 
1850 	priv->wdev.iftype = type;
1851 
1852 	return set_infra_mode(usbdev, mode);
1853 }
1854 
rndis_set_wiphy_params(struct wiphy * wiphy,u32 changed)1855 static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed)
1856 {
1857 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1858 	struct usbnet *usbdev = priv->usbdev;
1859 	int err;
1860 
1861 	if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
1862 		err = set_frag_threshold(usbdev, wiphy->frag_threshold);
1863 		if (err < 0)
1864 			return err;
1865 	}
1866 
1867 	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
1868 		err = set_rts_threshold(usbdev, wiphy->rts_threshold);
1869 		if (err < 0)
1870 			return err;
1871 	}
1872 
1873 	return 0;
1874 }
1875 
rndis_set_tx_power(struct wiphy * wiphy,struct wireless_dev * wdev,enum nl80211_tx_power_setting type,int mbm)1876 static int rndis_set_tx_power(struct wiphy *wiphy,
1877 			      struct wireless_dev *wdev,
1878 			      enum nl80211_tx_power_setting type,
1879 			      int mbm)
1880 {
1881 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1882 	struct usbnet *usbdev = priv->usbdev;
1883 
1884 	netdev_dbg(usbdev->net, "%s(): type:0x%x mbm:%i\n",
1885 		   __func__, type, mbm);
1886 
1887 	if (mbm < 0 || (mbm % 100))
1888 		return -ENOTSUPP;
1889 
1890 	/* Device doesn't support changing txpower after initialization, only
1891 	 * turn off/on radio. Support 'auto' mode and setting same dBm that is
1892 	 * currently used.
1893 	 */
1894 	if (type == NL80211_TX_POWER_AUTOMATIC ||
1895 	    MBM_TO_DBM(mbm) == get_bcm4320_power_dbm(priv)) {
1896 		if (!priv->radio_on)
1897 			disassociate(usbdev, true); /* turn on radio */
1898 
1899 		return 0;
1900 	}
1901 
1902 	return -ENOTSUPP;
1903 }
1904 
rndis_get_tx_power(struct wiphy * wiphy,struct wireless_dev * wdev,int * dbm)1905 static int rndis_get_tx_power(struct wiphy *wiphy,
1906 			      struct wireless_dev *wdev,
1907 			      int *dbm)
1908 {
1909 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
1910 	struct usbnet *usbdev = priv->usbdev;
1911 
1912 	*dbm = get_bcm4320_power_dbm(priv);
1913 
1914 	netdev_dbg(usbdev->net, "%s(): dbm:%i\n", __func__, *dbm);
1915 
1916 	return 0;
1917 }
1918 
1919 #define SCAN_DELAY_JIFFIES (6 * HZ)
rndis_scan(struct wiphy * wiphy,struct cfg80211_scan_request * request)1920 static int rndis_scan(struct wiphy *wiphy,
1921 			struct cfg80211_scan_request *request)
1922 {
1923 	struct net_device *dev = request->wdev->netdev;
1924 	struct usbnet *usbdev = netdev_priv(dev);
1925 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1926 	int ret;
1927 	int delay = SCAN_DELAY_JIFFIES;
1928 
1929 	netdev_dbg(usbdev->net, "cfg80211.scan\n");
1930 
1931 	/* Get current bssid list from device before new scan, as new scan
1932 	 * clears internal bssid list.
1933 	 */
1934 	rndis_check_bssid_list(usbdev, NULL, NULL);
1935 
1936 	if (priv->scan_request && priv->scan_request != request)
1937 		return -EBUSY;
1938 
1939 	priv->scan_request = request;
1940 
1941 	ret = rndis_start_bssid_list_scan(usbdev);
1942 	if (ret == 0) {
1943 		if (priv->device_type == RNDIS_BCM4320A)
1944 			delay = HZ;
1945 
1946 		/* Wait before retrieving scan results from device */
1947 		queue_delayed_work(priv->workqueue, &priv->scan_work, delay);
1948 	}
1949 
1950 	return ret;
1951 }
1952 
rndis_bss_info_update(struct usbnet * usbdev,struct ndis_80211_bssid_ex * bssid)1953 static bool rndis_bss_info_update(struct usbnet *usbdev,
1954 				  struct ndis_80211_bssid_ex *bssid)
1955 {
1956 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
1957 	struct ieee80211_channel *channel;
1958 	struct cfg80211_bss *bss;
1959 	s32 signal;
1960 	u64 timestamp;
1961 	u16 capability;
1962 	u16 beacon_interval;
1963 	struct ndis_80211_fixed_ies *fixed;
1964 	int ie_len, bssid_len;
1965 	u8 *ie;
1966 
1967 	netdev_dbg(usbdev->net, " found bssid: '%.32s' [%pM], len: %d\n",
1968 		   bssid->ssid.essid, bssid->mac, le32_to_cpu(bssid->length));
1969 
1970 	/* parse bssid structure */
1971 	bssid_len = le32_to_cpu(bssid->length);
1972 
1973 	if (bssid_len < sizeof(struct ndis_80211_bssid_ex) +
1974 			sizeof(struct ndis_80211_fixed_ies))
1975 		return false;
1976 
1977 	fixed = (struct ndis_80211_fixed_ies *)bssid->ies;
1978 
1979 	ie = (void *)(bssid->ies + sizeof(struct ndis_80211_fixed_ies));
1980 	ie_len = min(bssid_len - (int)sizeof(*bssid),
1981 					(int)le32_to_cpu(bssid->ie_length));
1982 	ie_len -= sizeof(struct ndis_80211_fixed_ies);
1983 	if (ie_len < 0)
1984 		return false;
1985 
1986 	/* extract data for cfg80211_inform_bss */
1987 	channel = ieee80211_get_channel(priv->wdev.wiphy,
1988 			KHZ_TO_MHZ(le32_to_cpu(bssid->config.ds_config)));
1989 	if (!channel)
1990 		return false;
1991 
1992 	signal = level_to_qual(le32_to_cpu(bssid->rssi));
1993 	timestamp = le64_to_cpu(*(__le64 *)fixed->timestamp);
1994 	capability = le16_to_cpu(fixed->capabilities);
1995 	beacon_interval = le16_to_cpu(fixed->beacon_interval);
1996 
1997 	bss = cfg80211_inform_bss(priv->wdev.wiphy, channel,
1998 				  CFG80211_BSS_FTYPE_UNKNOWN, bssid->mac,
1999 				  timestamp, capability, beacon_interval,
2000 				  ie, ie_len, signal, GFP_KERNEL);
2001 	cfg80211_put_bss(priv->wdev.wiphy, bss);
2002 
2003 	return (bss != NULL);
2004 }
2005 
next_bssid_list_item(struct ndis_80211_bssid_ex * bssid,int * bssid_len,void * buf,int len)2006 static struct ndis_80211_bssid_ex *next_bssid_list_item(
2007 					struct ndis_80211_bssid_ex *bssid,
2008 					int *bssid_len, void *buf, int len)
2009 {
2010 	void *buf_end, *bssid_end;
2011 
2012 	buf_end = (char *)buf + len;
2013 	bssid_end = (char *)bssid + *bssid_len;
2014 
2015 	if ((int)(buf_end - bssid_end) < sizeof(bssid->length)) {
2016 		*bssid_len = 0;
2017 		return NULL;
2018 	} else {
2019 		bssid = (void *)((char *)bssid + *bssid_len);
2020 		*bssid_len = le32_to_cpu(bssid->length);
2021 		return bssid;
2022 	}
2023 }
2024 
check_bssid_list_item(struct ndis_80211_bssid_ex * bssid,int bssid_len,void * buf,int len)2025 static bool check_bssid_list_item(struct ndis_80211_bssid_ex *bssid,
2026 				  int bssid_len, void *buf, int len)
2027 {
2028 	void *buf_end, *bssid_end;
2029 
2030 	if (!bssid || bssid_len <= 0 || bssid_len > len)
2031 		return false;
2032 
2033 	buf_end = (char *)buf + len;
2034 	bssid_end = (char *)bssid + bssid_len;
2035 
2036 	return (int)(buf_end - bssid_end) >= 0 && (int)(bssid_end - buf) >= 0;
2037 }
2038 
rndis_check_bssid_list(struct usbnet * usbdev,u8 * match_bssid,bool * matched)2039 static int rndis_check_bssid_list(struct usbnet *usbdev, u8 *match_bssid,
2040 					bool *matched)
2041 {
2042 	void *buf = NULL;
2043 	struct ndis_80211_bssid_list_ex *bssid_list;
2044 	struct ndis_80211_bssid_ex *bssid;
2045 	int ret = -EINVAL, len, count, bssid_len, real_count, new_len;
2046 
2047 	netdev_dbg(usbdev->net, "%s()\n", __func__);
2048 
2049 	len = CONTROL_BUFFER_SIZE;
2050 resize_buf:
2051 	buf = kzalloc(len, GFP_KERNEL);
2052 	if (!buf) {
2053 		ret = -ENOMEM;
2054 		goto out;
2055 	}
2056 
2057 	/* BSSID-list might have got bigger last time we checked, keep
2058 	 * resizing until it won't get any bigger.
2059 	 */
2060 	new_len = len;
2061 	ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_BSSID_LIST,
2062 			      buf, &new_len);
2063 	if (ret != 0 || new_len < sizeof(struct ndis_80211_bssid_list_ex))
2064 		goto out;
2065 
2066 	if (new_len > len) {
2067 		len = new_len;
2068 		kfree(buf);
2069 		goto resize_buf;
2070 	}
2071 
2072 	len = new_len;
2073 
2074 	bssid_list = buf;
2075 	count = le32_to_cpu(bssid_list->num_items);
2076 	real_count = 0;
2077 	netdev_dbg(usbdev->net, "%s(): buflen: %d\n", __func__, len);
2078 
2079 	bssid_len = 0;
2080 	bssid = next_bssid_list_item((void *)bssid_list->bssid_data,
2081 				     &bssid_len, buf, len);
2082 
2083 	/* Device returns incorrect 'num_items'. Workaround by ignoring the
2084 	 * received 'num_items' and walking through full bssid buffer instead.
2085 	 */
2086 	while (check_bssid_list_item(bssid, bssid_len, buf, len)) {
2087 		if (rndis_bss_info_update(usbdev, bssid) && match_bssid &&
2088 		    matched) {
2089 			if (ether_addr_equal(bssid->mac, match_bssid))
2090 				*matched = true;
2091 		}
2092 
2093 		real_count++;
2094 		bssid = next_bssid_list_item(bssid, &bssid_len, buf, len);
2095 	}
2096 
2097 	netdev_dbg(usbdev->net, "%s(): num_items from device: %d, really found:"
2098 				" %d\n", __func__, count, real_count);
2099 
2100 out:
2101 	kfree(buf);
2102 	return ret;
2103 }
2104 
rndis_get_scan_results(struct work_struct * work)2105 static void rndis_get_scan_results(struct work_struct *work)
2106 {
2107 	struct rndis_wlan_private *priv =
2108 		container_of(work, struct rndis_wlan_private, scan_work.work);
2109 	struct usbnet *usbdev = priv->usbdev;
2110 	struct cfg80211_scan_info info = {};
2111 	int ret;
2112 
2113 	netdev_dbg(usbdev->net, "get_scan_results\n");
2114 
2115 	if (!priv->scan_request)
2116 		return;
2117 
2118 	ret = rndis_check_bssid_list(usbdev, NULL, NULL);
2119 
2120 	info.aborted = ret < 0;
2121 	cfg80211_scan_done(priv->scan_request, &info);
2122 
2123 	priv->scan_request = NULL;
2124 }
2125 
rndis_connect(struct wiphy * wiphy,struct net_device * dev,struct cfg80211_connect_params * sme)2126 static int rndis_connect(struct wiphy *wiphy, struct net_device *dev,
2127 					struct cfg80211_connect_params *sme)
2128 {
2129 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2130 	struct usbnet *usbdev = priv->usbdev;
2131 	struct ieee80211_channel *channel = sme->channel;
2132 	struct ndis_80211_ssid ssid;
2133 	int pairwise = RNDIS_WLAN_ALG_NONE;
2134 	int groupwise = RNDIS_WLAN_ALG_NONE;
2135 	int keymgmt = RNDIS_WLAN_KEY_MGMT_NONE;
2136 	int length, i, ret, chan = -1;
2137 
2138 	if (channel)
2139 		chan = ieee80211_frequency_to_channel(channel->center_freq);
2140 
2141 	groupwise = rndis_cipher_to_alg(sme->crypto.cipher_group);
2142 	for (i = 0; i < sme->crypto.n_ciphers_pairwise; i++)
2143 		pairwise |=
2144 			rndis_cipher_to_alg(sme->crypto.ciphers_pairwise[i]);
2145 
2146 	if (sme->crypto.n_ciphers_pairwise > 0 &&
2147 			pairwise == RNDIS_WLAN_ALG_NONE) {
2148 		netdev_err(usbdev->net, "Unsupported pairwise cipher\n");
2149 		return -ENOTSUPP;
2150 	}
2151 
2152 	for (i = 0; i < sme->crypto.n_akm_suites; i++)
2153 		keymgmt |=
2154 			rndis_akm_suite_to_key_mgmt(sme->crypto.akm_suites[i]);
2155 
2156 	if (sme->crypto.n_akm_suites > 0 &&
2157 			keymgmt == RNDIS_WLAN_KEY_MGMT_NONE) {
2158 		netdev_err(usbdev->net, "Invalid keymgmt\n");
2159 		return -ENOTSUPP;
2160 	}
2161 
2162 	netdev_dbg(usbdev->net, "cfg80211.connect('%.32s':[%pM]:%d:[%d,0x%x:0x%x]:[0x%x:0x%x]:0x%x)\n",
2163 		   sme->ssid, sme->bssid, chan,
2164 		   sme->privacy, sme->crypto.wpa_versions, sme->auth_type,
2165 		   groupwise, pairwise, keymgmt);
2166 
2167 	if (is_associated(usbdev))
2168 		disassociate(usbdev, false);
2169 
2170 	ret = set_infra_mode(usbdev, NDIS_80211_INFRA_INFRA);
2171 	if (ret < 0) {
2172 		netdev_dbg(usbdev->net, "connect: set_infra_mode failed, %d\n",
2173 			   ret);
2174 		goto err_turn_radio_on;
2175 	}
2176 
2177 	ret = set_auth_mode(usbdev, sme->crypto.wpa_versions, sme->auth_type,
2178 								keymgmt);
2179 	if (ret < 0) {
2180 		netdev_dbg(usbdev->net, "connect: set_auth_mode failed, %d\n",
2181 			   ret);
2182 		goto err_turn_radio_on;
2183 	}
2184 
2185 	set_priv_filter(usbdev);
2186 
2187 	ret = set_encr_mode(usbdev, pairwise, groupwise);
2188 	if (ret < 0) {
2189 		netdev_dbg(usbdev->net, "connect: set_encr_mode failed, %d\n",
2190 			   ret);
2191 		goto err_turn_radio_on;
2192 	}
2193 
2194 	if (channel) {
2195 		ret = set_channel(usbdev, chan);
2196 		if (ret < 0) {
2197 			netdev_dbg(usbdev->net, "connect: set_channel failed, %d\n",
2198 				   ret);
2199 			goto err_turn_radio_on;
2200 		}
2201 	}
2202 
2203 	if (sme->key && ((groupwise | pairwise) & RNDIS_WLAN_ALG_WEP)) {
2204 		priv->encr_tx_key_index = sme->key_idx;
2205 		ret = add_wep_key(usbdev, sme->key, sme->key_len, sme->key_idx);
2206 		if (ret < 0) {
2207 			netdev_dbg(usbdev->net, "connect: add_wep_key failed, %d (%d, %d)\n",
2208 				   ret, sme->key_len, sme->key_idx);
2209 			goto err_turn_radio_on;
2210 		}
2211 	}
2212 
2213 	if (sme->bssid && !is_zero_ether_addr(sme->bssid) &&
2214 				!is_broadcast_ether_addr(sme->bssid)) {
2215 		ret = set_bssid(usbdev, sme->bssid);
2216 		if (ret < 0) {
2217 			netdev_dbg(usbdev->net, "connect: set_bssid failed, %d\n",
2218 				   ret);
2219 			goto err_turn_radio_on;
2220 		}
2221 	} else
2222 		clear_bssid(usbdev);
2223 
2224 	length = sme->ssid_len;
2225 	if (length > NDIS_802_11_LENGTH_SSID)
2226 		length = NDIS_802_11_LENGTH_SSID;
2227 
2228 	memset(&ssid, 0, sizeof(ssid));
2229 	ssid.length = cpu_to_le32(length);
2230 	memcpy(ssid.essid, sme->ssid, length);
2231 
2232 	/* Pause and purge rx queue, so we don't pass packets before
2233 	 * 'media connect'-indication.
2234 	 */
2235 	usbnet_pause_rx(usbdev);
2236 	usbnet_purge_paused_rxq(usbdev);
2237 
2238 	ret = set_essid(usbdev, &ssid);
2239 	if (ret < 0)
2240 		netdev_dbg(usbdev->net, "connect: set_essid failed, %d\n", ret);
2241 	return ret;
2242 
2243 err_turn_radio_on:
2244 	disassociate(usbdev, true);
2245 
2246 	return ret;
2247 }
2248 
rndis_disconnect(struct wiphy * wiphy,struct net_device * dev,u16 reason_code)2249 static int rndis_disconnect(struct wiphy *wiphy, struct net_device *dev,
2250 								u16 reason_code)
2251 {
2252 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2253 	struct usbnet *usbdev = priv->usbdev;
2254 
2255 	netdev_dbg(usbdev->net, "cfg80211.disconnect(%d)\n", reason_code);
2256 
2257 	priv->connected = false;
2258 	eth_zero_addr(priv->bssid);
2259 
2260 	return deauthenticate(usbdev);
2261 }
2262 
rndis_join_ibss(struct wiphy * wiphy,struct net_device * dev,struct cfg80211_ibss_params * params)2263 static int rndis_join_ibss(struct wiphy *wiphy, struct net_device *dev,
2264 					struct cfg80211_ibss_params *params)
2265 {
2266 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2267 	struct usbnet *usbdev = priv->usbdev;
2268 	struct ieee80211_channel *channel = params->chandef.chan;
2269 	struct ndis_80211_ssid ssid;
2270 	enum nl80211_auth_type auth_type;
2271 	int ret, alg, length, chan = -1;
2272 
2273 	if (channel)
2274 		chan = ieee80211_frequency_to_channel(channel->center_freq);
2275 
2276 	/* TODO: How to handle ad-hoc encryption?
2277 	 * connect() has *key, join_ibss() doesn't. RNDIS requires key to be
2278 	 * pre-shared for encryption (open/shared/wpa), is key set before
2279 	 * join_ibss? Which auth_type to use (not in params)? What about WPA?
2280 	 */
2281 	if (params->privacy) {
2282 		auth_type = NL80211_AUTHTYPE_SHARED_KEY;
2283 		alg = RNDIS_WLAN_ALG_WEP;
2284 	} else {
2285 		auth_type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2286 		alg = RNDIS_WLAN_ALG_NONE;
2287 	}
2288 
2289 	netdev_dbg(usbdev->net, "cfg80211.join_ibss('%.32s':[%pM]:%d:%d)\n",
2290 		   params->ssid, params->bssid, chan, params->privacy);
2291 
2292 	if (is_associated(usbdev))
2293 		disassociate(usbdev, false);
2294 
2295 	ret = set_infra_mode(usbdev, NDIS_80211_INFRA_ADHOC);
2296 	if (ret < 0) {
2297 		netdev_dbg(usbdev->net, "join_ibss: set_infra_mode failed, %d\n",
2298 			   ret);
2299 		goto err_turn_radio_on;
2300 	}
2301 
2302 	ret = set_auth_mode(usbdev, 0, auth_type, RNDIS_WLAN_KEY_MGMT_NONE);
2303 	if (ret < 0) {
2304 		netdev_dbg(usbdev->net, "join_ibss: set_auth_mode failed, %d\n",
2305 			   ret);
2306 		goto err_turn_radio_on;
2307 	}
2308 
2309 	set_priv_filter(usbdev);
2310 
2311 	ret = set_encr_mode(usbdev, alg, RNDIS_WLAN_ALG_NONE);
2312 	if (ret < 0) {
2313 		netdev_dbg(usbdev->net, "join_ibss: set_encr_mode failed, %d\n",
2314 			   ret);
2315 		goto err_turn_radio_on;
2316 	}
2317 
2318 	if (channel) {
2319 		ret = set_channel(usbdev, chan);
2320 		if (ret < 0) {
2321 			netdev_dbg(usbdev->net, "join_ibss: set_channel failed, %d\n",
2322 				   ret);
2323 			goto err_turn_radio_on;
2324 		}
2325 	}
2326 
2327 	if (params->bssid && !is_zero_ether_addr(params->bssid) &&
2328 				!is_broadcast_ether_addr(params->bssid)) {
2329 		ret = set_bssid(usbdev, params->bssid);
2330 		if (ret < 0) {
2331 			netdev_dbg(usbdev->net, "join_ibss: set_bssid failed, %d\n",
2332 				   ret);
2333 			goto err_turn_radio_on;
2334 		}
2335 	} else
2336 		clear_bssid(usbdev);
2337 
2338 	length = params->ssid_len;
2339 	if (length > NDIS_802_11_LENGTH_SSID)
2340 		length = NDIS_802_11_LENGTH_SSID;
2341 
2342 	memset(&ssid, 0, sizeof(ssid));
2343 	ssid.length = cpu_to_le32(length);
2344 	memcpy(ssid.essid, params->ssid, length);
2345 
2346 	/* Don't need to pause rx queue for ad-hoc. */
2347 	usbnet_purge_paused_rxq(usbdev);
2348 	usbnet_resume_rx(usbdev);
2349 
2350 	ret = set_essid(usbdev, &ssid);
2351 	if (ret < 0)
2352 		netdev_dbg(usbdev->net, "join_ibss: set_essid failed, %d\n",
2353 			   ret);
2354 	return ret;
2355 
2356 err_turn_radio_on:
2357 	disassociate(usbdev, true);
2358 
2359 	return ret;
2360 }
2361 
rndis_leave_ibss(struct wiphy * wiphy,struct net_device * dev)2362 static int rndis_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
2363 {
2364 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2365 	struct usbnet *usbdev = priv->usbdev;
2366 
2367 	netdev_dbg(usbdev->net, "cfg80211.leave_ibss()\n");
2368 
2369 	priv->connected = false;
2370 	eth_zero_addr(priv->bssid);
2371 
2372 	return deauthenticate(usbdev);
2373 }
2374 
rndis_add_key(struct wiphy * wiphy,struct net_device * netdev,int link_id,u8 key_index,bool pairwise,const u8 * mac_addr,struct key_params * params)2375 static int rndis_add_key(struct wiphy *wiphy, struct net_device *netdev,
2376 			 int link_id,  u8 key_index, bool pairwise,
2377 			 const u8 *mac_addr, struct key_params *params)
2378 {
2379 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2380 	struct usbnet *usbdev = priv->usbdev;
2381 	__le32 flags;
2382 
2383 	netdev_dbg(usbdev->net, "%s(%i, %pM, %08x)\n",
2384 		   __func__, key_index, mac_addr, params->cipher);
2385 
2386 	switch (params->cipher) {
2387 	case WLAN_CIPHER_SUITE_WEP40:
2388 	case WLAN_CIPHER_SUITE_WEP104:
2389 		return add_wep_key(usbdev, params->key, params->key_len,
2390 								key_index);
2391 	case WLAN_CIPHER_SUITE_TKIP:
2392 	case WLAN_CIPHER_SUITE_CCMP:
2393 		flags = 0;
2394 
2395 		if (params->seq && params->seq_len > 0)
2396 			flags |= NDIS_80211_ADDKEY_SET_INIT_RECV_SEQ;
2397 		if (mac_addr)
2398 			flags |= NDIS_80211_ADDKEY_PAIRWISE_KEY |
2399 					NDIS_80211_ADDKEY_TRANSMIT_KEY;
2400 
2401 		return add_wpa_key(usbdev, params->key, params->key_len,
2402 				key_index, mac_addr, params->seq,
2403 				params->seq_len, params->cipher, flags);
2404 	default:
2405 		netdev_dbg(usbdev->net, "%s(): unsupported cipher %08x\n",
2406 			   __func__, params->cipher);
2407 		return -ENOTSUPP;
2408 	}
2409 }
2410 
rndis_del_key(struct wiphy * wiphy,struct net_device * netdev,int link_id,u8 key_index,bool pairwise,const u8 * mac_addr)2411 static int rndis_del_key(struct wiphy *wiphy, struct net_device *netdev,
2412 			 int link_id, u8 key_index, bool pairwise,
2413 			 const u8 *mac_addr)
2414 {
2415 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2416 	struct usbnet *usbdev = priv->usbdev;
2417 
2418 	netdev_dbg(usbdev->net, "%s(%i, %pM)\n", __func__, key_index, mac_addr);
2419 
2420 	return remove_key(usbdev, key_index, mac_addr);
2421 }
2422 
rndis_set_default_key(struct wiphy * wiphy,struct net_device * netdev,int link_id,u8 key_index,bool unicast,bool multicast)2423 static int rndis_set_default_key(struct wiphy *wiphy, struct net_device *netdev,
2424 				 int link_id, u8 key_index, bool unicast,
2425 				 bool multicast)
2426 {
2427 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2428 	struct usbnet *usbdev = priv->usbdev;
2429 	struct rndis_wlan_encr_key key;
2430 
2431 	netdev_dbg(usbdev->net, "%s(%i)\n", __func__, key_index);
2432 
2433 	if (key_index >= RNDIS_WLAN_NUM_KEYS)
2434 		return -ENOENT;
2435 
2436 	priv->encr_tx_key_index = key_index;
2437 
2438 	if (is_wpa_key(priv, key_index))
2439 		return 0;
2440 
2441 	key = priv->encr_keys[key_index];
2442 
2443 	return add_wep_key(usbdev, key.material, key.len, key_index);
2444 }
2445 
rndis_fill_station_info(struct usbnet * usbdev,struct station_info * sinfo)2446 static void rndis_fill_station_info(struct usbnet *usbdev,
2447 						struct station_info *sinfo)
2448 {
2449 	__le32 linkspeed, rssi;
2450 	int ret, len;
2451 
2452 	memset(sinfo, 0, sizeof(*sinfo));
2453 
2454 	len = sizeof(linkspeed);
2455 	ret = rndis_query_oid(usbdev, RNDIS_OID_GEN_LINK_SPEED, &linkspeed, &len);
2456 	if (ret == 0) {
2457 		sinfo->txrate.legacy = le32_to_cpu(linkspeed) / 1000;
2458 		sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
2459 	}
2460 
2461 	len = sizeof(rssi);
2462 	ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_RSSI,
2463 			      &rssi, &len);
2464 	if (ret == 0) {
2465 		sinfo->signal = level_to_qual(le32_to_cpu(rssi));
2466 		sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL);
2467 	}
2468 }
2469 
rndis_get_station(struct wiphy * wiphy,struct net_device * dev,const u8 * mac,struct station_info * sinfo)2470 static int rndis_get_station(struct wiphy *wiphy, struct net_device *dev,
2471 			     const u8 *mac, struct station_info *sinfo)
2472 {
2473 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2474 	struct usbnet *usbdev = priv->usbdev;
2475 
2476 	if (!ether_addr_equal(priv->bssid, mac))
2477 		return -ENOENT;
2478 
2479 	rndis_fill_station_info(usbdev, sinfo);
2480 
2481 	return 0;
2482 }
2483 
rndis_dump_station(struct wiphy * wiphy,struct net_device * dev,int idx,u8 * mac,struct station_info * sinfo)2484 static int rndis_dump_station(struct wiphy *wiphy, struct net_device *dev,
2485 			       int idx, u8 *mac, struct station_info *sinfo)
2486 {
2487 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2488 	struct usbnet *usbdev = priv->usbdev;
2489 
2490 	if (idx != 0)
2491 		return -ENOENT;
2492 
2493 	memcpy(mac, priv->bssid, ETH_ALEN);
2494 
2495 	rndis_fill_station_info(usbdev, sinfo);
2496 
2497 	return 0;
2498 }
2499 
rndis_set_pmksa(struct wiphy * wiphy,struct net_device * netdev,struct cfg80211_pmksa * pmksa)2500 static int rndis_set_pmksa(struct wiphy *wiphy, struct net_device *netdev,
2501 				struct cfg80211_pmksa *pmksa)
2502 {
2503 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2504 	struct usbnet *usbdev = priv->usbdev;
2505 	struct ndis_80211_pmkid *pmkids;
2506 	u32 *tmp = (u32 *)pmksa->pmkid;
2507 
2508 	netdev_dbg(usbdev->net, "%s(%pM, %08X:%08X:%08X:%08X)\n", __func__,
2509 			pmksa->bssid,
2510 			cpu_to_be32(tmp[0]), cpu_to_be32(tmp[1]),
2511 			cpu_to_be32(tmp[2]), cpu_to_be32(tmp[3]));
2512 
2513 	pmkids = get_device_pmkids(usbdev);
2514 	if (IS_ERR(pmkids)) {
2515 		/* couldn't read PMKID cache from device */
2516 		return PTR_ERR(pmkids);
2517 	}
2518 
2519 	pmkids = update_pmkid(usbdev, pmkids, pmksa, wiphy->max_num_pmkids);
2520 	if (IS_ERR(pmkids)) {
2521 		/* not found, list full, etc */
2522 		return PTR_ERR(pmkids);
2523 	}
2524 
2525 	return set_device_pmkids(usbdev, pmkids);
2526 }
2527 
rndis_del_pmksa(struct wiphy * wiphy,struct net_device * netdev,struct cfg80211_pmksa * pmksa)2528 static int rndis_del_pmksa(struct wiphy *wiphy, struct net_device *netdev,
2529 				struct cfg80211_pmksa *pmksa)
2530 {
2531 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2532 	struct usbnet *usbdev = priv->usbdev;
2533 	struct ndis_80211_pmkid *pmkids;
2534 	u32 *tmp = (u32 *)pmksa->pmkid;
2535 
2536 	netdev_dbg(usbdev->net, "%s(%pM, %08X:%08X:%08X:%08X)\n", __func__,
2537 			pmksa->bssid,
2538 			cpu_to_be32(tmp[0]), cpu_to_be32(tmp[1]),
2539 			cpu_to_be32(tmp[2]), cpu_to_be32(tmp[3]));
2540 
2541 	pmkids = get_device_pmkids(usbdev);
2542 	if (IS_ERR(pmkids)) {
2543 		/* Couldn't read PMKID cache from device */
2544 		return PTR_ERR(pmkids);
2545 	}
2546 
2547 	pmkids = remove_pmkid(usbdev, pmkids, pmksa, wiphy->max_num_pmkids);
2548 	if (IS_ERR(pmkids)) {
2549 		/* not found, etc */
2550 		return PTR_ERR(pmkids);
2551 	}
2552 
2553 	return set_device_pmkids(usbdev, pmkids);
2554 }
2555 
rndis_flush_pmksa(struct wiphy * wiphy,struct net_device * netdev)2556 static int rndis_flush_pmksa(struct wiphy *wiphy, struct net_device *netdev)
2557 {
2558 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2559 	struct usbnet *usbdev = priv->usbdev;
2560 	struct ndis_80211_pmkid pmkid;
2561 
2562 	netdev_dbg(usbdev->net, "%s()\n", __func__);
2563 
2564 	memset(&pmkid, 0, sizeof(pmkid));
2565 
2566 	pmkid.length = cpu_to_le32(sizeof(pmkid));
2567 	pmkid.bssid_info_count = cpu_to_le32(0);
2568 
2569 	return rndis_set_oid(usbdev, RNDIS_OID_802_11_PMKID,
2570 			     &pmkid, sizeof(pmkid));
2571 }
2572 
rndis_set_power_mgmt(struct wiphy * wiphy,struct net_device * dev,bool enabled,int timeout)2573 static int rndis_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
2574 				bool enabled, int timeout)
2575 {
2576 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2577 	struct usbnet *usbdev = priv->usbdev;
2578 	int power_mode;
2579 	__le32 mode;
2580 	int ret;
2581 
2582 	if (priv->device_type != RNDIS_BCM4320B)
2583 		return -ENOTSUPP;
2584 
2585 	netdev_dbg(usbdev->net, "%s(): %s, %d\n", __func__,
2586 				enabled ? "enabled" : "disabled",
2587 				timeout);
2588 
2589 	if (enabled)
2590 		power_mode = NDIS_80211_POWER_MODE_FAST_PSP;
2591 	else
2592 		power_mode = NDIS_80211_POWER_MODE_CAM;
2593 
2594 	if (power_mode == priv->power_mode)
2595 		return 0;
2596 
2597 	priv->power_mode = power_mode;
2598 
2599 	mode = cpu_to_le32(power_mode);
2600 	ret = rndis_set_oid(usbdev, RNDIS_OID_802_11_POWER_MODE,
2601 			    &mode, sizeof(mode));
2602 
2603 	netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_POWER_MODE -> %d\n",
2604 				__func__, ret);
2605 
2606 	return ret;
2607 }
2608 
rndis_set_cqm_rssi_config(struct wiphy * wiphy,struct net_device * dev,s32 rssi_thold,u32 rssi_hyst)2609 static int rndis_set_cqm_rssi_config(struct wiphy *wiphy,
2610 					struct net_device *dev,
2611 					s32 rssi_thold, u32 rssi_hyst)
2612 {
2613 	struct rndis_wlan_private *priv = wiphy_priv(wiphy);
2614 
2615 	priv->cqm_rssi_thold = rssi_thold;
2616 	priv->cqm_rssi_hyst = rssi_hyst;
2617 	priv->last_cqm_event_rssi = 0;
2618 
2619 	return 0;
2620 }
2621 
rndis_wlan_craft_connected_bss(struct usbnet * usbdev,u8 * bssid,struct ndis_80211_assoc_info * info)2622 static void rndis_wlan_craft_connected_bss(struct usbnet *usbdev, u8 *bssid,
2623 					   struct ndis_80211_assoc_info *info)
2624 {
2625 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2626 	struct ieee80211_channel *channel;
2627 	struct ndis_80211_ssid ssid;
2628 	struct cfg80211_bss *bss;
2629 	s32 signal;
2630 	u64 timestamp;
2631 	u16 capability;
2632 	u32 beacon_period = 0;
2633 	__le32 rssi;
2634 	u8 ie_buf[34];
2635 	int len, ret, ie_len;
2636 
2637 	/* Get signal quality, in case of error use rssi=0 and ignore error. */
2638 	len = sizeof(rssi);
2639 	rssi = 0;
2640 	ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_RSSI,
2641 			      &rssi, &len);
2642 	signal = level_to_qual(le32_to_cpu(rssi));
2643 
2644 	netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_RSSI -> %d, "
2645 		   "rssi:%d, qual: %d\n", __func__, ret, le32_to_cpu(rssi),
2646 		   level_to_qual(le32_to_cpu(rssi)));
2647 
2648 	/* Get AP capabilities */
2649 	if (info) {
2650 		capability = le16_to_cpu(info->resp_ie.capa);
2651 	} else {
2652 		/* Set atleast ESS/IBSS capability */
2653 		capability = (priv->infra_mode == NDIS_80211_INFRA_INFRA) ?
2654 				WLAN_CAPABILITY_ESS : WLAN_CAPABILITY_IBSS;
2655 	}
2656 
2657 	/* Get channel and beacon interval */
2658 	channel = get_current_channel(usbdev, &beacon_period);
2659 	if (!channel) {
2660 		netdev_warn(usbdev->net, "%s(): could not get channel.\n",
2661 					__func__);
2662 		return;
2663 	}
2664 
2665 	/* Get SSID, in case of error, use zero length SSID and ignore error. */
2666 	len = sizeof(ssid);
2667 	memset(&ssid, 0, sizeof(ssid));
2668 	ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_SSID,
2669 			      &ssid, &len);
2670 	netdev_dbg(usbdev->net, "%s(): RNDIS_OID_802_11_SSID -> %d, len: %d, ssid: "
2671 				"'%.32s'\n", __func__, ret,
2672 				le32_to_cpu(ssid.length), ssid.essid);
2673 
2674 	if (le32_to_cpu(ssid.length) > 32)
2675 		ssid.length = cpu_to_le32(32);
2676 
2677 	ie_buf[0] = WLAN_EID_SSID;
2678 	ie_buf[1] = le32_to_cpu(ssid.length);
2679 	memcpy(&ie_buf[2], ssid.essid, le32_to_cpu(ssid.length));
2680 
2681 	ie_len = le32_to_cpu(ssid.length) + 2;
2682 
2683 	/* no tsf */
2684 	timestamp = 0;
2685 
2686 	netdev_dbg(usbdev->net, "%s(): channel:%d(freq), bssid:[%pM], tsf:%d, "
2687 		"capa:%x, beacon int:%d, resp_ie(len:%d, essid:'%.32s'), "
2688 		"signal:%d\n", __func__, (channel ? channel->center_freq : -1),
2689 		bssid, (u32)timestamp, capability, beacon_period, ie_len,
2690 		ssid.essid, signal);
2691 
2692 	bss = cfg80211_inform_bss(priv->wdev.wiphy, channel,
2693 				  CFG80211_BSS_FTYPE_UNKNOWN, bssid,
2694 				  timestamp, capability, beacon_period,
2695 				  ie_buf, ie_len, signal, GFP_KERNEL);
2696 	cfg80211_put_bss(priv->wdev.wiphy, bss);
2697 }
2698 
2699 /*
2700  * workers, indication handlers, device poller
2701  */
rndis_wlan_do_link_up_work(struct usbnet * usbdev)2702 static void rndis_wlan_do_link_up_work(struct usbnet *usbdev)
2703 {
2704 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2705 	struct ndis_80211_assoc_info *info = NULL;
2706 	u8 bssid[ETH_ALEN];
2707 	unsigned int resp_ie_len, req_ie_len;
2708 	unsigned int offset;
2709 	u8 *req_ie, *resp_ie;
2710 	int ret;
2711 	bool roamed = false;
2712 	bool match_bss;
2713 
2714 	if (priv->infra_mode == NDIS_80211_INFRA_INFRA && priv->connected) {
2715 		/* received media connect indication while connected, either
2716 		 * device reassociated with same AP or roamed to new. */
2717 		roamed = true;
2718 	}
2719 
2720 	req_ie_len = 0;
2721 	resp_ie_len = 0;
2722 	req_ie = NULL;
2723 	resp_ie = NULL;
2724 
2725 	if (priv->infra_mode == NDIS_80211_INFRA_INFRA) {
2726 		info = kzalloc(CONTROL_BUFFER_SIZE, GFP_KERNEL);
2727 		if (!info) {
2728 			/* No memory? Try resume work later */
2729 			set_bit(WORK_LINK_UP, &priv->work_pending);
2730 			queue_work(priv->workqueue, &priv->work);
2731 			return;
2732 		}
2733 
2734 		/* Get association info IEs from device. */
2735 		ret = get_association_info(usbdev, info, CONTROL_BUFFER_SIZE);
2736 		if (!ret) {
2737 			req_ie_len = le32_to_cpu(info->req_ie_length);
2738 			if (req_ie_len > CONTROL_BUFFER_SIZE)
2739 				req_ie_len = CONTROL_BUFFER_SIZE;
2740 			if (req_ie_len != 0) {
2741 				offset = le32_to_cpu(info->offset_req_ies);
2742 
2743 				if (offset > CONTROL_BUFFER_SIZE)
2744 					offset = CONTROL_BUFFER_SIZE;
2745 
2746 				req_ie = (u8 *)info + offset;
2747 
2748 				if (offset + req_ie_len > CONTROL_BUFFER_SIZE)
2749 					req_ie_len =
2750 						CONTROL_BUFFER_SIZE - offset;
2751 			}
2752 
2753 			resp_ie_len = le32_to_cpu(info->resp_ie_length);
2754 			if (resp_ie_len > CONTROL_BUFFER_SIZE)
2755 				resp_ie_len = CONTROL_BUFFER_SIZE;
2756 			if (resp_ie_len != 0) {
2757 				offset = le32_to_cpu(info->offset_resp_ies);
2758 
2759 				if (offset > CONTROL_BUFFER_SIZE)
2760 					offset = CONTROL_BUFFER_SIZE;
2761 
2762 				resp_ie = (u8 *)info + offset;
2763 
2764 				if (offset + resp_ie_len > CONTROL_BUFFER_SIZE)
2765 					resp_ie_len =
2766 						CONTROL_BUFFER_SIZE - offset;
2767 			}
2768 		} else {
2769 			/* Since rndis_wlan_craft_connected_bss() might use info
2770 			 * later and expects info to contain valid data if
2771 			 * non-null, free info and set NULL here.
2772 			 */
2773 			kfree(info);
2774 			info = NULL;
2775 		}
2776 	} else if (WARN_ON(priv->infra_mode != NDIS_80211_INFRA_ADHOC))
2777 		return;
2778 
2779 	ret = get_bssid(usbdev, bssid);
2780 	if (ret < 0)
2781 		memset(bssid, 0, sizeof(bssid));
2782 
2783 	netdev_dbg(usbdev->net, "link up work: [%pM]%s\n",
2784 		   bssid, roamed ? " roamed" : "");
2785 
2786 	/* Internal bss list in device should contain at least the currently
2787 	 * connected bss and we can get it to cfg80211 with
2788 	 * rndis_check_bssid_list().
2789 	 *
2790 	 * NDIS spec says: "If the device is associated, but the associated
2791 	 *  BSSID is not in its BSSID scan list, then the driver must add an
2792 	 *  entry for the BSSID at the end of the data that it returns in
2793 	 *  response to query of RNDIS_OID_802_11_BSSID_LIST."
2794 	 *
2795 	 * NOTE: Seems to be true for BCM4320b variant, but not BCM4320a.
2796 	 */
2797 	match_bss = false;
2798 	rndis_check_bssid_list(usbdev, bssid, &match_bss);
2799 
2800 	if (!is_zero_ether_addr(bssid) && !match_bss) {
2801 		/* Couldn't get bss from device, we need to manually craft bss
2802 		 * for cfg80211.
2803 		 */
2804 		rndis_wlan_craft_connected_bss(usbdev, bssid, info);
2805 	}
2806 
2807 	if (priv->infra_mode == NDIS_80211_INFRA_INFRA) {
2808 		if (!roamed) {
2809 			cfg80211_connect_result(usbdev->net, bssid, req_ie,
2810 						req_ie_len, resp_ie,
2811 						resp_ie_len, 0, GFP_KERNEL);
2812 		} else {
2813 			struct cfg80211_roam_info roam_info = {
2814 				.links[0].channel =
2815 					get_current_channel(usbdev, NULL),
2816 				.links[0].bssid = bssid,
2817 				.req_ie = req_ie,
2818 				.req_ie_len = req_ie_len,
2819 				.resp_ie = resp_ie,
2820 				.resp_ie_len = resp_ie_len,
2821 			};
2822 
2823 			cfg80211_roamed(usbdev->net, &roam_info, GFP_KERNEL);
2824 		}
2825 	} else if (priv->infra_mode == NDIS_80211_INFRA_ADHOC)
2826 		cfg80211_ibss_joined(usbdev->net, bssid,
2827 				     get_current_channel(usbdev, NULL),
2828 				     GFP_KERNEL);
2829 
2830 	kfree(info);
2831 
2832 	priv->connected = true;
2833 	memcpy(priv->bssid, bssid, ETH_ALEN);
2834 
2835 	usbnet_resume_rx(usbdev);
2836 	netif_carrier_on(usbdev->net);
2837 }
2838 
rndis_wlan_do_link_down_work(struct usbnet * usbdev)2839 static void rndis_wlan_do_link_down_work(struct usbnet *usbdev)
2840 {
2841 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2842 
2843 	if (priv->connected) {
2844 		priv->connected = false;
2845 		eth_zero_addr(priv->bssid);
2846 
2847 		deauthenticate(usbdev);
2848 
2849 		cfg80211_disconnected(usbdev->net, 0, NULL, 0, true, GFP_KERNEL);
2850 	}
2851 
2852 	netif_carrier_off(usbdev->net);
2853 }
2854 
rndis_wlan_worker(struct work_struct * work)2855 static void rndis_wlan_worker(struct work_struct *work)
2856 {
2857 	struct rndis_wlan_private *priv =
2858 		container_of(work, struct rndis_wlan_private, work);
2859 	struct usbnet *usbdev = priv->usbdev;
2860 
2861 	if (test_and_clear_bit(WORK_LINK_UP, &priv->work_pending))
2862 		rndis_wlan_do_link_up_work(usbdev);
2863 
2864 	if (test_and_clear_bit(WORK_LINK_DOWN, &priv->work_pending))
2865 		rndis_wlan_do_link_down_work(usbdev);
2866 
2867 	if (test_and_clear_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending))
2868 		set_multicast_list(usbdev);
2869 }
2870 
rndis_wlan_set_multicast_list(struct net_device * dev)2871 static void rndis_wlan_set_multicast_list(struct net_device *dev)
2872 {
2873 	struct usbnet *usbdev = netdev_priv(dev);
2874 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
2875 
2876 	if (test_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending))
2877 		return;
2878 
2879 	set_bit(WORK_SET_MULTICAST_LIST, &priv->work_pending);
2880 	queue_work(priv->workqueue, &priv->work);
2881 }
2882 
rndis_wlan_auth_indication(struct usbnet * usbdev,struct ndis_80211_status_indication * indication,int len)2883 static void rndis_wlan_auth_indication(struct usbnet *usbdev,
2884 				struct ndis_80211_status_indication *indication,
2885 				int len)
2886 {
2887 	u8 *buf;
2888 	const char *type;
2889 	int flags, buflen, key_id;
2890 	bool pairwise_error, group_error;
2891 	struct ndis_80211_auth_request *auth_req;
2892 	enum nl80211_key_type key_type;
2893 
2894 	/* must have at least one array entry */
2895 	if (len < offsetof(struct ndis_80211_status_indication, u) +
2896 				sizeof(struct ndis_80211_auth_request)) {
2897 		netdev_info(usbdev->net, "authentication indication: too short message (%i)\n",
2898 			    len);
2899 		return;
2900 	}
2901 
2902 	buf = (void *)&indication->u.auth_request[0];
2903 	buflen = len - offsetof(struct ndis_80211_status_indication, u);
2904 
2905 	while (buflen >= sizeof(*auth_req)) {
2906 		auth_req = (void *)buf;
2907 		if (buflen < le32_to_cpu(auth_req->length))
2908 			return;
2909 		type = "unknown";
2910 		flags = le32_to_cpu(auth_req->flags);
2911 		pairwise_error = false;
2912 		group_error = false;
2913 
2914 		if (flags & 0x1)
2915 			type = "reauth request";
2916 		if (flags & 0x2)
2917 			type = "key update request";
2918 		if (flags & 0x6) {
2919 			pairwise_error = true;
2920 			type = "pairwise_error";
2921 		}
2922 		if (flags & 0xe) {
2923 			group_error = true;
2924 			type = "group_error";
2925 		}
2926 
2927 		netdev_info(usbdev->net, "authentication indication: %s (0x%08x)\n",
2928 			    type, le32_to_cpu(auth_req->flags));
2929 
2930 		if (pairwise_error) {
2931 			key_type = NL80211_KEYTYPE_PAIRWISE;
2932 			key_id = -1;
2933 
2934 			cfg80211_michael_mic_failure(usbdev->net,
2935 							auth_req->bssid,
2936 							key_type, key_id, NULL,
2937 							GFP_KERNEL);
2938 		}
2939 
2940 		if (group_error) {
2941 			key_type = NL80211_KEYTYPE_GROUP;
2942 			key_id = -1;
2943 
2944 			cfg80211_michael_mic_failure(usbdev->net,
2945 							auth_req->bssid,
2946 							key_type, key_id, NULL,
2947 							GFP_KERNEL);
2948 		}
2949 
2950 		buflen -= le32_to_cpu(auth_req->length);
2951 		buf += le32_to_cpu(auth_req->length);
2952 	}
2953 }
2954 
rndis_wlan_pmkid_cand_list_indication(struct usbnet * usbdev,struct ndis_80211_status_indication * indication,int len)2955 static void rndis_wlan_pmkid_cand_list_indication(struct usbnet *usbdev,
2956 				struct ndis_80211_status_indication *indication,
2957 				int len)
2958 {
2959 	struct ndis_80211_pmkid_cand_list *cand_list;
2960 	int list_len, expected_len, i;
2961 
2962 	if (len < offsetof(struct ndis_80211_status_indication, u) +
2963 				sizeof(struct ndis_80211_pmkid_cand_list)) {
2964 		netdev_info(usbdev->net, "pmkid candidate list indication: too short message (%i)\n",
2965 			    len);
2966 		return;
2967 	}
2968 
2969 	list_len = le32_to_cpu(indication->u.cand_list.num_candidates) *
2970 			sizeof(struct ndis_80211_pmkid_candidate);
2971 	expected_len = sizeof(struct ndis_80211_pmkid_cand_list) + list_len +
2972 			offsetof(struct ndis_80211_status_indication, u);
2973 
2974 	if (len < expected_len) {
2975 		netdev_info(usbdev->net, "pmkid candidate list indication: list larger than buffer (%i < %i)\n",
2976 			    len, expected_len);
2977 		return;
2978 	}
2979 
2980 	cand_list = &indication->u.cand_list;
2981 
2982 	netdev_info(usbdev->net, "pmkid candidate list indication: version %i, candidates %i\n",
2983 		    le32_to_cpu(cand_list->version),
2984 		    le32_to_cpu(cand_list->num_candidates));
2985 
2986 	if (le32_to_cpu(cand_list->version) != 1)
2987 		return;
2988 
2989 	for (i = 0; i < le32_to_cpu(cand_list->num_candidates); i++) {
2990 		struct ndis_80211_pmkid_candidate *cand =
2991 						&cand_list->candidate_list[i];
2992 		bool preauth = !!(cand->flags & NDIS_80211_PMKID_CAND_PREAUTH);
2993 
2994 		netdev_dbg(usbdev->net, "cand[%i]: flags: 0x%08x, preauth: %d, bssid: %pM\n",
2995 			   i, le32_to_cpu(cand->flags), preauth, cand->bssid);
2996 
2997 		cfg80211_pmksa_candidate_notify(usbdev->net, i, cand->bssid,
2998 						preauth, GFP_ATOMIC);
2999 	}
3000 }
3001 
rndis_wlan_media_specific_indication(struct usbnet * usbdev,struct rndis_indicate * msg,int buflen)3002 static void rndis_wlan_media_specific_indication(struct usbnet *usbdev,
3003 			struct rndis_indicate *msg, int buflen)
3004 {
3005 	struct ndis_80211_status_indication *indication;
3006 	unsigned int len, offset;
3007 
3008 	offset = offsetof(struct rndis_indicate, status) +
3009 			le32_to_cpu(msg->offset);
3010 	len = le32_to_cpu(msg->length);
3011 
3012 	if (len < 8) {
3013 		netdev_info(usbdev->net, "media specific indication, ignore too short message (%i < 8)\n",
3014 			    len);
3015 		return;
3016 	}
3017 
3018 	if (len > buflen || offset > buflen || offset + len > buflen) {
3019 		netdev_info(usbdev->net, "media specific indication, too large to fit to buffer (%i > %i)\n",
3020 			    offset + len, buflen);
3021 		return;
3022 	}
3023 
3024 	indication = (void *)((u8 *)msg + offset);
3025 
3026 	switch (le32_to_cpu(indication->status_type)) {
3027 	case NDIS_80211_STATUSTYPE_RADIOSTATE:
3028 		netdev_info(usbdev->net, "radio state indication: %i\n",
3029 			    le32_to_cpu(indication->u.radio_status));
3030 		return;
3031 
3032 	case NDIS_80211_STATUSTYPE_MEDIASTREAMMODE:
3033 		netdev_info(usbdev->net, "media stream mode indication: %i\n",
3034 			    le32_to_cpu(indication->u.media_stream_mode));
3035 		return;
3036 
3037 	case NDIS_80211_STATUSTYPE_AUTHENTICATION:
3038 		rndis_wlan_auth_indication(usbdev, indication, len);
3039 		return;
3040 
3041 	case NDIS_80211_STATUSTYPE_PMKID_CANDIDATELIST:
3042 		rndis_wlan_pmkid_cand_list_indication(usbdev, indication, len);
3043 		return;
3044 
3045 	default:
3046 		netdev_info(usbdev->net, "media specific indication: unknown status type 0x%08x\n",
3047 			    le32_to_cpu(indication->status_type));
3048 	}
3049 }
3050 
rndis_wlan_indication(struct usbnet * usbdev,void * ind,int buflen)3051 static void rndis_wlan_indication(struct usbnet *usbdev, void *ind, int buflen)
3052 {
3053 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3054 	struct rndis_indicate *msg = ind;
3055 
3056 	switch (le32_to_cpu(msg->status)) {
3057 	case RNDIS_STATUS_MEDIA_CONNECT:
3058 		if (priv->current_command_oid == RNDIS_OID_802_11_ADD_KEY) {
3059 			/* RNDIS_OID_802_11_ADD_KEY causes sometimes extra
3060 			 * "media connect" indications which confuses driver
3061 			 * and userspace to think that device is
3062 			 * roaming/reassociating when it isn't.
3063 			 */
3064 			netdev_dbg(usbdev->net, "ignored RNDIS_OID_802_11_ADD_KEY triggered 'media connect'\n");
3065 			return;
3066 		}
3067 
3068 		usbnet_pause_rx(usbdev);
3069 
3070 		netdev_info(usbdev->net, "media connect\n");
3071 
3072 		/* queue work to avoid recursive calls into rndis_command */
3073 		set_bit(WORK_LINK_UP, &priv->work_pending);
3074 		queue_work(priv->workqueue, &priv->work);
3075 		break;
3076 
3077 	case RNDIS_STATUS_MEDIA_DISCONNECT:
3078 		netdev_info(usbdev->net, "media disconnect\n");
3079 
3080 		/* queue work to avoid recursive calls into rndis_command */
3081 		set_bit(WORK_LINK_DOWN, &priv->work_pending);
3082 		queue_work(priv->workqueue, &priv->work);
3083 		break;
3084 
3085 	case RNDIS_STATUS_MEDIA_SPECIFIC_INDICATION:
3086 		rndis_wlan_media_specific_indication(usbdev, msg, buflen);
3087 		break;
3088 
3089 	default:
3090 		netdev_info(usbdev->net, "indication: 0x%08x\n",
3091 			    le32_to_cpu(msg->status));
3092 		break;
3093 	}
3094 }
3095 
rndis_wlan_get_caps(struct usbnet * usbdev,struct wiphy * wiphy)3096 static int rndis_wlan_get_caps(struct usbnet *usbdev, struct wiphy *wiphy)
3097 {
3098 	struct {
3099 		__le32	num_items;
3100 		__le32	items[8];
3101 	} networks_supported;
3102 	struct ndis_80211_capability caps;
3103 	int len, retval, i, n;
3104 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3105 
3106 	/* determine supported modes */
3107 	len = sizeof(networks_supported);
3108 	retval = rndis_query_oid(usbdev,
3109 				 RNDIS_OID_802_11_NETWORK_TYPES_SUPPORTED,
3110 				 &networks_supported, &len);
3111 	if (!retval) {
3112 		n = le32_to_cpu(networks_supported.num_items);
3113 		if (n > 8)
3114 			n = 8;
3115 		for (i = 0; i < n; i++) {
3116 			switch (le32_to_cpu(networks_supported.items[i])) {
3117 			case NDIS_80211_TYPE_FREQ_HOP:
3118 			case NDIS_80211_TYPE_DIRECT_SEQ:
3119 				priv->caps |= CAP_MODE_80211B;
3120 				break;
3121 			case NDIS_80211_TYPE_OFDM_A:
3122 				priv->caps |= CAP_MODE_80211A;
3123 				break;
3124 			case NDIS_80211_TYPE_OFDM_G:
3125 				priv->caps |= CAP_MODE_80211G;
3126 				break;
3127 			}
3128 		}
3129 	}
3130 
3131 	/* get device 802.11 capabilities, number of PMKIDs */
3132 	len = sizeof(caps);
3133 	retval = rndis_query_oid(usbdev,
3134 				 RNDIS_OID_802_11_CAPABILITY,
3135 				 &caps, &len);
3136 	if (!retval) {
3137 		netdev_dbg(usbdev->net, "RNDIS_OID_802_11_CAPABILITY -> len %d, "
3138 				"ver %d, pmkids %d, auth-encr-pairs %d\n",
3139 				le32_to_cpu(caps.length),
3140 				le32_to_cpu(caps.version),
3141 				le32_to_cpu(caps.num_pmkids),
3142 				le32_to_cpu(caps.num_auth_encr_pair));
3143 		wiphy->max_num_pmkids = le32_to_cpu(caps.num_pmkids);
3144 	} else
3145 		wiphy->max_num_pmkids = 0;
3146 
3147 	return retval;
3148 }
3149 
rndis_do_cqm(struct usbnet * usbdev,s32 rssi)3150 static void rndis_do_cqm(struct usbnet *usbdev, s32 rssi)
3151 {
3152 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3153 	enum nl80211_cqm_rssi_threshold_event event;
3154 	int thold, hyst, last_event;
3155 
3156 	if (priv->cqm_rssi_thold >= 0 || rssi >= 0)
3157 		return;
3158 	if (priv->infra_mode != NDIS_80211_INFRA_INFRA)
3159 		return;
3160 
3161 	last_event = priv->last_cqm_event_rssi;
3162 	thold = priv->cqm_rssi_thold;
3163 	hyst = priv->cqm_rssi_hyst;
3164 
3165 	if (rssi < thold && (last_event == 0 || rssi < last_event - hyst))
3166 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
3167 	else if (rssi > thold && (last_event == 0 || rssi > last_event + hyst))
3168 		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
3169 	else
3170 		return;
3171 
3172 	priv->last_cqm_event_rssi = rssi;
3173 	cfg80211_cqm_rssi_notify(usbdev->net, event, rssi, GFP_KERNEL);
3174 }
3175 
3176 #define DEVICE_POLLER_JIFFIES (HZ)
rndis_device_poller(struct work_struct * work)3177 static void rndis_device_poller(struct work_struct *work)
3178 {
3179 	struct rndis_wlan_private *priv =
3180 		container_of(work, struct rndis_wlan_private,
3181 							dev_poller_work.work);
3182 	struct usbnet *usbdev = priv->usbdev;
3183 	__le32 rssi, tmp;
3184 	int len, ret, j;
3185 	int update_jiffies = DEVICE_POLLER_JIFFIES;
3186 	void *buf;
3187 
3188 	/* Only check/do workaround when connected. Calling is_associated()
3189 	 * also polls device with rndis_command() and catches for media link
3190 	 * indications.
3191 	 */
3192 	if (!is_associated(usbdev)) {
3193 		/* Workaround bad scanning in BCM4320a devices with active
3194 		 * background scanning when not associated.
3195 		 */
3196 		if (priv->device_type == RNDIS_BCM4320A && priv->radio_on &&
3197 		    !priv->scan_request) {
3198 			/* Get previous scan results */
3199 			rndis_check_bssid_list(usbdev, NULL, NULL);
3200 
3201 			/* Initiate new scan */
3202 			rndis_start_bssid_list_scan(usbdev);
3203 		}
3204 
3205 		goto end;
3206 	}
3207 
3208 	len = sizeof(rssi);
3209 	ret = rndis_query_oid(usbdev, RNDIS_OID_802_11_RSSI,
3210 			      &rssi, &len);
3211 	if (ret == 0) {
3212 		priv->last_qual = level_to_qual(le32_to_cpu(rssi));
3213 		rndis_do_cqm(usbdev, le32_to_cpu(rssi));
3214 	}
3215 
3216 	netdev_dbg(usbdev->net, "dev-poller: RNDIS_OID_802_11_RSSI -> %d, rssi:%d, qual: %d\n",
3217 		   ret, le32_to_cpu(rssi), level_to_qual(le32_to_cpu(rssi)));
3218 
3219 	/* Workaround transfer stalls on poor quality links.
3220 	 * TODO: find right way to fix these stalls (as stalls do not happen
3221 	 * with ndiswrapper/windows driver). */
3222 	if (priv->param_workaround_interval > 0 && priv->last_qual <= 25) {
3223 		/* Decrease stats worker interval to catch stalls.
3224 		 * faster. Faster than 400-500ms causes packet loss,
3225 		 * Slower doesn't catch stalls fast enough.
3226 		 */
3227 		j = msecs_to_jiffies(priv->param_workaround_interval);
3228 		if (j > DEVICE_POLLER_JIFFIES)
3229 			j = DEVICE_POLLER_JIFFIES;
3230 		else if (j <= 0)
3231 			j = 1;
3232 		update_jiffies = j;
3233 
3234 		/* Send scan OID. Use of both OIDs is required to get device
3235 		 * working.
3236 		 */
3237 		tmp = cpu_to_le32(1);
3238 		rndis_set_oid(usbdev,
3239 			      RNDIS_OID_802_11_BSSID_LIST_SCAN,
3240 			      &tmp, sizeof(tmp));
3241 
3242 		len = CONTROL_BUFFER_SIZE;
3243 		buf = kmalloc(len, GFP_KERNEL);
3244 		if (!buf)
3245 			goto end;
3246 
3247 		rndis_query_oid(usbdev,
3248 				RNDIS_OID_802_11_BSSID_LIST,
3249 				buf, &len);
3250 		kfree(buf);
3251 	}
3252 
3253 end:
3254 	if (update_jiffies >= HZ)
3255 		update_jiffies = round_jiffies_relative(update_jiffies);
3256 	else {
3257 		j = round_jiffies_relative(update_jiffies);
3258 		if (abs(j - update_jiffies) <= 10)
3259 			update_jiffies = j;
3260 	}
3261 
3262 	queue_delayed_work(priv->workqueue, &priv->dev_poller_work,
3263 								update_jiffies);
3264 }
3265 
3266 /*
3267  * driver/device initialization
3268  */
rndis_copy_module_params(struct usbnet * usbdev,int device_type)3269 static void rndis_copy_module_params(struct usbnet *usbdev, int device_type)
3270 {
3271 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3272 
3273 	priv->device_type = device_type;
3274 
3275 	priv->param_country[0] = modparam_country[0];
3276 	priv->param_country[1] = modparam_country[1];
3277 	priv->param_country[2] = 0;
3278 	priv->param_frameburst   = modparam_frameburst;
3279 	priv->param_afterburner  = modparam_afterburner;
3280 	priv->param_power_save   = modparam_power_save;
3281 	priv->param_power_output = modparam_power_output;
3282 	priv->param_roamtrigger  = modparam_roamtrigger;
3283 	priv->param_roamdelta    = modparam_roamdelta;
3284 
3285 	priv->param_country[0] = toupper(priv->param_country[0]);
3286 	priv->param_country[1] = toupper(priv->param_country[1]);
3287 	/* doesn't support EU as country code, use FI instead */
3288 	if (!strcmp(priv->param_country, "EU"))
3289 		strcpy(priv->param_country, "FI");
3290 
3291 	if (priv->param_power_save < 0)
3292 		priv->param_power_save = 0;
3293 	else if (priv->param_power_save > 2)
3294 		priv->param_power_save = 2;
3295 
3296 	if (priv->param_power_output < 0)
3297 		priv->param_power_output = 0;
3298 	else if (priv->param_power_output > 3)
3299 		priv->param_power_output = 3;
3300 
3301 	if (priv->param_roamtrigger < -80)
3302 		priv->param_roamtrigger = -80;
3303 	else if (priv->param_roamtrigger > -60)
3304 		priv->param_roamtrigger = -60;
3305 
3306 	if (priv->param_roamdelta < 0)
3307 		priv->param_roamdelta = 0;
3308 	else if (priv->param_roamdelta > 2)
3309 		priv->param_roamdelta = 2;
3310 
3311 	if (modparam_workaround_interval < 0)
3312 		priv->param_workaround_interval = 500;
3313 	else
3314 		priv->param_workaround_interval = modparam_workaround_interval;
3315 }
3316 
unknown_early_init(struct usbnet * usbdev)3317 static int unknown_early_init(struct usbnet *usbdev)
3318 {
3319 	/* copy module parameters for unknown so that iwconfig reports txpower
3320 	 * and workaround parameter is copied to private structure correctly.
3321 	 */
3322 	rndis_copy_module_params(usbdev, RNDIS_UNKNOWN);
3323 
3324 	/* This is unknown device, so do not try set configuration parameters.
3325 	 */
3326 
3327 	return 0;
3328 }
3329 
bcm4320a_early_init(struct usbnet * usbdev)3330 static int bcm4320a_early_init(struct usbnet *usbdev)
3331 {
3332 	/* copy module parameters for bcm4320a so that iwconfig reports txpower
3333 	 * and workaround parameter is copied to private structure correctly.
3334 	 */
3335 	rndis_copy_module_params(usbdev, RNDIS_BCM4320A);
3336 
3337 	/* bcm4320a doesn't handle configuration parameters well. Try
3338 	 * set any and you get partially zeroed mac and broken device.
3339 	 */
3340 
3341 	return 0;
3342 }
3343 
bcm4320b_early_init(struct usbnet * usbdev)3344 static int bcm4320b_early_init(struct usbnet *usbdev)
3345 {
3346 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3347 	char buf[8];
3348 
3349 	rndis_copy_module_params(usbdev, RNDIS_BCM4320B);
3350 
3351 	/* Early initialization settings, setting these won't have effect
3352 	 * if called after generic_rndis_bind().
3353 	 */
3354 
3355 	rndis_set_config_parameter_str(usbdev, "Country", priv->param_country);
3356 	rndis_set_config_parameter_str(usbdev, "FrameBursting",
3357 					priv->param_frameburst ? "1" : "0");
3358 	rndis_set_config_parameter_str(usbdev, "Afterburner",
3359 					priv->param_afterburner ? "1" : "0");
3360 	sprintf(buf, "%d", priv->param_power_save);
3361 	rndis_set_config_parameter_str(usbdev, "PowerSaveMode", buf);
3362 	sprintf(buf, "%d", priv->param_power_output);
3363 	rndis_set_config_parameter_str(usbdev, "PwrOut", buf);
3364 	sprintf(buf, "%d", priv->param_roamtrigger);
3365 	rndis_set_config_parameter_str(usbdev, "RoamTrigger", buf);
3366 	sprintf(buf, "%d", priv->param_roamdelta);
3367 	rndis_set_config_parameter_str(usbdev, "RoamDelta", buf);
3368 
3369 	return 0;
3370 }
3371 
3372 /* same as rndis_netdev_ops but with local multicast handler */
3373 static const struct net_device_ops rndis_wlan_netdev_ops = {
3374 	.ndo_open		= usbnet_open,
3375 	.ndo_stop		= usbnet_stop,
3376 	.ndo_start_xmit		= usbnet_start_xmit,
3377 	.ndo_tx_timeout		= usbnet_tx_timeout,
3378 	.ndo_get_stats64	= dev_get_tstats64,
3379 	.ndo_set_mac_address 	= eth_mac_addr,
3380 	.ndo_validate_addr	= eth_validate_addr,
3381 	.ndo_set_rx_mode	= rndis_wlan_set_multicast_list,
3382 };
3383 
rndis_wlan_bind(struct usbnet * usbdev,struct usb_interface * intf)3384 static int rndis_wlan_bind(struct usbnet *usbdev, struct usb_interface *intf)
3385 {
3386 	struct wiphy *wiphy;
3387 	struct rndis_wlan_private *priv;
3388 	int retval, len;
3389 	__le32 tmp;
3390 
3391 	/* allocate wiphy and rndis private data
3392 	 * NOTE: We only support a single virtual interface, so wiphy
3393 	 * and wireless_dev are somewhat synonymous for this device.
3394 	 */
3395 	wiphy = wiphy_new(&rndis_config_ops, sizeof(struct rndis_wlan_private));
3396 	if (!wiphy)
3397 		return -ENOMEM;
3398 
3399 	priv = wiphy_priv(wiphy);
3400 	usbdev->net->ieee80211_ptr = &priv->wdev;
3401 	priv->wdev.wiphy = wiphy;
3402 	priv->wdev.iftype = NL80211_IFTYPE_STATION;
3403 
3404 	/* These have to be initialized before calling generic_rndis_bind().
3405 	 * Otherwise we'll be in big trouble in rndis_wlan_early_init().
3406 	 */
3407 	usbdev->driver_priv = priv;
3408 	priv->usbdev = usbdev;
3409 
3410 	mutex_init(&priv->command_lock);
3411 
3412 	/* because rndis_command() sleeps we need to use workqueue */
3413 	priv->workqueue = create_singlethread_workqueue("rndis_wlan");
3414 	if (!priv->workqueue) {
3415 		wiphy_free(wiphy);
3416 		return -ENOMEM;
3417 	}
3418 	INIT_WORK(&priv->work, rndis_wlan_worker);
3419 	INIT_DELAYED_WORK(&priv->dev_poller_work, rndis_device_poller);
3420 	INIT_DELAYED_WORK(&priv->scan_work, rndis_get_scan_results);
3421 
3422 	/* try bind rndis_host */
3423 	retval = generic_rndis_bind(usbdev, intf, FLAG_RNDIS_PHYM_WIRELESS);
3424 	if (retval < 0)
3425 		goto fail;
3426 
3427 	/* generic_rndis_bind set packet filter to multicast_all+
3428 	 * promisc mode which doesn't work well for our devices (device
3429 	 * picks up rssi to closest station instead of to access point).
3430 	 *
3431 	 * rndis_host wants to avoid all OID as much as possible
3432 	 * so do promisc/multicast handling in rndis_wlan.
3433 	 */
3434 	usbdev->net->netdev_ops = &rndis_wlan_netdev_ops;
3435 
3436 	tmp = cpu_to_le32(RNDIS_PACKET_TYPE_DIRECTED | RNDIS_PACKET_TYPE_BROADCAST);
3437 	retval = rndis_set_oid(usbdev,
3438 			       RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
3439 			       &tmp, sizeof(tmp));
3440 
3441 	len = sizeof(tmp);
3442 	retval = rndis_query_oid(usbdev,
3443 				 RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
3444 				 &tmp, &len);
3445 	priv->multicast_size = le32_to_cpu(tmp);
3446 	if (retval < 0 || priv->multicast_size < 0)
3447 		priv->multicast_size = 0;
3448 	if (priv->multicast_size > 0)
3449 		usbdev->net->flags |= IFF_MULTICAST;
3450 	else
3451 		usbdev->net->flags &= ~IFF_MULTICAST;
3452 
3453 	/* fill-out wiphy structure and register w/ cfg80211 */
3454 	memcpy(wiphy->perm_addr, usbdev->net->dev_addr, ETH_ALEN);
3455 	wiphy->privid = rndis_wiphy_privid;
3456 	wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION)
3457 					| BIT(NL80211_IFTYPE_ADHOC);
3458 	wiphy->max_scan_ssids = 1;
3459 
3460 	/* TODO: fill-out band/encr information based on priv->caps */
3461 	rndis_wlan_get_caps(usbdev, wiphy);
3462 
3463 	memcpy(priv->channels, rndis_channels, sizeof(rndis_channels));
3464 	memcpy(priv->rates, rndis_rates, sizeof(rndis_rates));
3465 	priv->band.channels = priv->channels;
3466 	priv->band.n_channels = ARRAY_SIZE(rndis_channels);
3467 	priv->band.bitrates = priv->rates;
3468 	priv->band.n_bitrates = ARRAY_SIZE(rndis_rates);
3469 	wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
3470 	wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
3471 
3472 	memcpy(priv->cipher_suites, rndis_cipher_suites,
3473 						sizeof(rndis_cipher_suites));
3474 	wiphy->cipher_suites = priv->cipher_suites;
3475 	wiphy->n_cipher_suites = ARRAY_SIZE(rndis_cipher_suites);
3476 
3477 	set_wiphy_dev(wiphy, &usbdev->udev->dev);
3478 
3479 	if (wiphy_register(wiphy)) {
3480 		retval = -ENODEV;
3481 		goto fail;
3482 	}
3483 
3484 	set_default_iw_params(usbdev);
3485 
3486 	priv->power_mode = -1;
3487 
3488 	/* set default rts/frag */
3489 	rndis_set_wiphy_params(wiphy,
3490 			WIPHY_PARAM_FRAG_THRESHOLD | WIPHY_PARAM_RTS_THRESHOLD);
3491 
3492 	/* turn radio off on init */
3493 	priv->radio_on = false;
3494 	disassociate(usbdev, false);
3495 	netif_carrier_off(usbdev->net);
3496 
3497 	return 0;
3498 
3499 fail:
3500 	cancel_delayed_work_sync(&priv->dev_poller_work);
3501 	cancel_delayed_work_sync(&priv->scan_work);
3502 	cancel_work_sync(&priv->work);
3503 	destroy_workqueue(priv->workqueue);
3504 
3505 	wiphy_free(wiphy);
3506 	return retval;
3507 }
3508 
rndis_wlan_unbind(struct usbnet * usbdev,struct usb_interface * intf)3509 static void rndis_wlan_unbind(struct usbnet *usbdev, struct usb_interface *intf)
3510 {
3511 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3512 
3513 	/* turn radio off */
3514 	disassociate(usbdev, false);
3515 
3516 	cancel_delayed_work_sync(&priv->dev_poller_work);
3517 	cancel_delayed_work_sync(&priv->scan_work);
3518 	cancel_work_sync(&priv->work);
3519 	destroy_workqueue(priv->workqueue);
3520 
3521 	rndis_unbind(usbdev, intf);
3522 
3523 	wiphy_unregister(priv->wdev.wiphy);
3524 	wiphy_free(priv->wdev.wiphy);
3525 }
3526 
rndis_wlan_reset(struct usbnet * usbdev)3527 static int rndis_wlan_reset(struct usbnet *usbdev)
3528 {
3529 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3530 	int retval;
3531 
3532 	netdev_dbg(usbdev->net, "%s()\n", __func__);
3533 
3534 	retval = rndis_reset(usbdev);
3535 	if (retval)
3536 		netdev_warn(usbdev->net, "rndis_reset failed: %d\n", retval);
3537 
3538 	/* rndis_reset cleared multicast list, so restore here.
3539 	   (set_multicast_list() also turns on current packet filter) */
3540 	set_multicast_list(usbdev);
3541 
3542 	queue_delayed_work(priv->workqueue, &priv->dev_poller_work,
3543 		round_jiffies_relative(DEVICE_POLLER_JIFFIES));
3544 
3545 	return deauthenticate(usbdev);
3546 }
3547 
rndis_wlan_stop(struct usbnet * usbdev)3548 static int rndis_wlan_stop(struct usbnet *usbdev)
3549 {
3550 	struct rndis_wlan_private *priv = get_rndis_wlan_priv(usbdev);
3551 	int retval;
3552 	__le32 filter;
3553 
3554 	netdev_dbg(usbdev->net, "%s()\n", __func__);
3555 
3556 	retval = disassociate(usbdev, false);
3557 
3558 	priv->work_pending = 0;
3559 	cancel_delayed_work_sync(&priv->dev_poller_work);
3560 	cancel_delayed_work_sync(&priv->scan_work);
3561 	cancel_work_sync(&priv->work);
3562 	flush_workqueue(priv->workqueue);
3563 
3564 	if (priv->scan_request) {
3565 		struct cfg80211_scan_info info = {
3566 			.aborted = true,
3567 		};
3568 
3569 		cfg80211_scan_done(priv->scan_request, &info);
3570 		priv->scan_request = NULL;
3571 	}
3572 
3573 	/* Set current packet filter zero to block receiving data packets from
3574 	   device. */
3575 	filter = 0;
3576 	rndis_set_oid(usbdev, RNDIS_OID_GEN_CURRENT_PACKET_FILTER, &filter,
3577 								sizeof(filter));
3578 
3579 	return retval;
3580 }
3581 
3582 static const struct driver_info	bcm4320b_info = {
3583 	.description =	"Wireless RNDIS device, BCM4320b based",
3584 	.flags =	FLAG_WLAN | FLAG_FRAMING_RN | FLAG_NO_SETINT |
3585 				FLAG_AVOID_UNLINK_URBS,
3586 	.bind =		rndis_wlan_bind,
3587 	.unbind =	rndis_wlan_unbind,
3588 	.status =	rndis_status,
3589 	.rx_fixup =	rndis_rx_fixup,
3590 	.tx_fixup =	rndis_tx_fixup,
3591 	.reset =	rndis_wlan_reset,
3592 	.stop =		rndis_wlan_stop,
3593 	.early_init =	bcm4320b_early_init,
3594 	.indication =	rndis_wlan_indication,
3595 };
3596 
3597 static const struct driver_info	bcm4320a_info = {
3598 	.description =	"Wireless RNDIS device, BCM4320a based",
3599 	.flags =	FLAG_WLAN | FLAG_FRAMING_RN | FLAG_NO_SETINT |
3600 				FLAG_AVOID_UNLINK_URBS,
3601 	.bind =		rndis_wlan_bind,
3602 	.unbind =	rndis_wlan_unbind,
3603 	.status =	rndis_status,
3604 	.rx_fixup =	rndis_rx_fixup,
3605 	.tx_fixup =	rndis_tx_fixup,
3606 	.reset =	rndis_wlan_reset,
3607 	.stop =		rndis_wlan_stop,
3608 	.early_init =	bcm4320a_early_init,
3609 	.indication =	rndis_wlan_indication,
3610 };
3611 
3612 static const struct driver_info rndis_wlan_info = {
3613 	.description =	"Wireless RNDIS device",
3614 	.flags =	FLAG_WLAN | FLAG_FRAMING_RN | FLAG_NO_SETINT |
3615 				FLAG_AVOID_UNLINK_URBS,
3616 	.bind =		rndis_wlan_bind,
3617 	.unbind =	rndis_wlan_unbind,
3618 	.status =	rndis_status,
3619 	.rx_fixup =	rndis_rx_fixup,
3620 	.tx_fixup =	rndis_tx_fixup,
3621 	.reset =	rndis_wlan_reset,
3622 	.stop =		rndis_wlan_stop,
3623 	.early_init =	unknown_early_init,
3624 	.indication =	rndis_wlan_indication,
3625 };
3626 
3627 /*-------------------------------------------------------------------------*/
3628 
3629 static const struct usb_device_id products [] = {
3630 #define	RNDIS_MASTER_INTERFACE \
3631 	.bInterfaceClass	= USB_CLASS_COMM, \
3632 	.bInterfaceSubClass	= 2 /* ACM */, \
3633 	.bInterfaceProtocol	= 0x0ff
3634 
3635 /* INF driver for these devices have DriverVer >= 4.xx.xx.xx and many custom
3636  * parameters available. Chipset marked as 'BCM4320SKFBG' in NDISwrapper-wiki.
3637  */
3638 {
3639 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3640 			  | USB_DEVICE_ID_MATCH_DEVICE,
3641 	.idVendor		= 0x0411,
3642 	.idProduct		= 0x00bc,	/* Buffalo WLI-U2-KG125S */
3643 	RNDIS_MASTER_INTERFACE,
3644 	.driver_info		= (unsigned long) &bcm4320b_info,
3645 }, {
3646 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3647 			  | USB_DEVICE_ID_MATCH_DEVICE,
3648 	.idVendor		= 0x0baf,
3649 	.idProduct		= 0x011b,	/* U.S. Robotics USR5421 */
3650 	RNDIS_MASTER_INTERFACE,
3651 	.driver_info		= (unsigned long) &bcm4320b_info,
3652 }, {
3653 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3654 			  | USB_DEVICE_ID_MATCH_DEVICE,
3655 	.idVendor		= 0x050d,
3656 	.idProduct		= 0x011b,	/* Belkin F5D7051 */
3657 	RNDIS_MASTER_INTERFACE,
3658 	.driver_info		= (unsigned long) &bcm4320b_info,
3659 }, {
3660 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3661 			  | USB_DEVICE_ID_MATCH_DEVICE,
3662 	.idVendor		= 0x1799,	/* Belkin has two vendor ids */
3663 	.idProduct		= 0x011b,	/* Belkin F5D7051 */
3664 	RNDIS_MASTER_INTERFACE,
3665 	.driver_info		= (unsigned long) &bcm4320b_info,
3666 }, {
3667 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3668 			  | USB_DEVICE_ID_MATCH_DEVICE,
3669 	.idVendor		= 0x13b1,
3670 	.idProduct		= 0x0014,	/* Linksys WUSB54GSv2 */
3671 	RNDIS_MASTER_INTERFACE,
3672 	.driver_info		= (unsigned long) &bcm4320b_info,
3673 }, {
3674 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3675 			  | USB_DEVICE_ID_MATCH_DEVICE,
3676 	.idVendor		= 0x13b1,
3677 	.idProduct		= 0x0026,	/* Linksys WUSB54GSC */
3678 	RNDIS_MASTER_INTERFACE,
3679 	.driver_info		= (unsigned long) &bcm4320b_info,
3680 }, {
3681 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3682 			  | USB_DEVICE_ID_MATCH_DEVICE,
3683 	.idVendor		= 0x0b05,
3684 	.idProduct		= 0x1717,	/* Asus WL169gE */
3685 	RNDIS_MASTER_INTERFACE,
3686 	.driver_info		= (unsigned long) &bcm4320b_info,
3687 }, {
3688 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3689 			  | USB_DEVICE_ID_MATCH_DEVICE,
3690 	.idVendor		= 0x0a5c,
3691 	.idProduct		= 0xd11b,	/* Eminent EM4045 */
3692 	RNDIS_MASTER_INTERFACE,
3693 	.driver_info		= (unsigned long) &bcm4320b_info,
3694 }, {
3695 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3696 			  | USB_DEVICE_ID_MATCH_DEVICE,
3697 	.idVendor		= 0x1690,
3698 	.idProduct		= 0x0715,	/* BT Voyager 1055 */
3699 	RNDIS_MASTER_INTERFACE,
3700 	.driver_info		= (unsigned long) &bcm4320b_info,
3701 },
3702 /* These devices have DriverVer < 4.xx.xx.xx and do not have any custom
3703  * parameters available, hardware probably contain older firmware version with
3704  * no way of updating. Chipset marked as 'BCM4320????' in NDISwrapper-wiki.
3705  */
3706 {
3707 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3708 			  | USB_DEVICE_ID_MATCH_DEVICE,
3709 	.idVendor		= 0x13b1,
3710 	.idProduct		= 0x000e,	/* Linksys WUSB54GSv1 */
3711 	RNDIS_MASTER_INTERFACE,
3712 	.driver_info		= (unsigned long) &bcm4320a_info,
3713 }, {
3714 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3715 			  | USB_DEVICE_ID_MATCH_DEVICE,
3716 	.idVendor		= 0x0baf,
3717 	.idProduct		= 0x0111,	/* U.S. Robotics USR5420 */
3718 	RNDIS_MASTER_INTERFACE,
3719 	.driver_info		= (unsigned long) &bcm4320a_info,
3720 }, {
3721 	.match_flags	=   USB_DEVICE_ID_MATCH_INT_INFO
3722 			  | USB_DEVICE_ID_MATCH_DEVICE,
3723 	.idVendor		= 0x0411,
3724 	.idProduct		= 0x004b,	/* BUFFALO WLI-USB-G54 */
3725 	RNDIS_MASTER_INTERFACE,
3726 	.driver_info		= (unsigned long) &bcm4320a_info,
3727 },
3728 /* Generic Wireless RNDIS devices that we don't have exact
3729  * idVendor/idProduct/chip yet.
3730  */
3731 {
3732 	/* RNDIS is MSFT's un-official variant of CDC ACM */
3733 	USB_INTERFACE_INFO(USB_CLASS_COMM, 2 /* ACM */, 0x0ff),
3734 	.driver_info = (unsigned long) &rndis_wlan_info,
3735 }, {
3736 	/* "ActiveSync" is an undocumented variant of RNDIS, used in WM5 */
3737 	USB_INTERFACE_INFO(USB_CLASS_MISC, 1, 1),
3738 	.driver_info = (unsigned long) &rndis_wlan_info,
3739 },
3740 	{ },		// END
3741 };
3742 MODULE_DEVICE_TABLE(usb, products);
3743 
3744 static struct usb_driver rndis_wlan_driver = {
3745 	.name =		"rndis_wlan",
3746 	.id_table =	products,
3747 	.probe =	usbnet_probe,
3748 	.disconnect =	usbnet_disconnect,
3749 	.suspend =	usbnet_suspend,
3750 	.resume =	usbnet_resume,
3751 	.disable_hub_initiated_lpm = 1,
3752 };
3753 
3754 module_usb_driver(rndis_wlan_driver);
3755 
3756 MODULE_AUTHOR("Bjorge Dijkstra");
3757 MODULE_AUTHOR("Jussi Kivilinna");
3758 MODULE_DESCRIPTION("Driver for RNDIS based USB Wireless adapters");
3759 MODULE_LICENSE("GPL");
3760 
3761