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1 | /* |
2 | * Marvell Wireless LAN device driver: scan ioctl and command handling | |
3 | * | |
4 | * Copyright (C) 2011, Marvell International Ltd. | |
5 | * | |
6 | * This software file (the "File") is distributed by Marvell International | |
7 | * Ltd. under the terms of the GNU General Public License Version 2, June 1991 | |
8 | * (the "License"). You may use, redistribute and/or modify this File in | |
9 | * accordance with the terms and conditions of the License, a copy of which | |
10 | * is available by writing to the Free Software Foundation, Inc., | |
11 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the | |
12 | * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. | |
13 | * | |
14 | * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE | |
15 | * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE | |
16 | * ARE EXPRESSLY DISCLAIMED. The License provides additional details about | |
17 | * this warranty disclaimer. | |
18 | */ | |
19 | ||
20 | #include "decl.h" | |
21 | #include "ioctl.h" | |
22 | #include "util.h" | |
23 | #include "fw.h" | |
24 | #include "main.h" | |
25 | #include "11n.h" | |
26 | #include "cfg80211.h" | |
27 | ||
28 | /* The maximum number of channels the firmware can scan per command */ | |
29 | #define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14 | |
30 | ||
31 | #define MWIFIEX_CHANNELS_PER_SCAN_CMD 4 | |
32 | ||
33 | /* Memory needed to store a max sized Channel List TLV for a firmware scan */ | |
34 | #define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \ | |
35 | + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \ | |
36 | *sizeof(struct mwifiex_chan_scan_param_set))) | |
37 | ||
38 | /* Memory needed to store supported rate */ | |
39 | #define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \ | |
40 | + HOSTCMD_SUPPORTED_RATES) | |
41 | ||
42 | /* Memory needed to store a max number/size WildCard SSID TLV for a firmware | |
43 | scan */ | |
44 | #define WILDCARD_SSID_TLV_MAX_SIZE \ | |
45 | (MWIFIEX_MAX_SSID_LIST_LENGTH * \ | |
46 | (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \ | |
47 | + IEEE80211_MAX_SSID_LEN)) | |
48 | ||
49 | /* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */ | |
50 | #define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \ | |
51 | + sizeof(struct mwifiex_ie_types_num_probes) \ | |
52 | + sizeof(struct mwifiex_ie_types_htcap) \ | |
53 | + CHAN_TLV_MAX_SIZE \ | |
54 | + RATE_TLV_MAX_SIZE \ | |
55 | + WILDCARD_SSID_TLV_MAX_SIZE) | |
56 | ||
57 | ||
58 | union mwifiex_scan_cmd_config_tlv { | |
59 | /* Scan configuration (variable length) */ | |
60 | struct mwifiex_scan_cmd_config config; | |
61 | /* Max allocated block */ | |
62 | u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC]; | |
63 | }; | |
64 | ||
65 | enum cipher_suite { | |
66 | CIPHER_SUITE_TKIP, | |
67 | CIPHER_SUITE_CCMP, | |
68 | CIPHER_SUITE_MAX | |
69 | }; | |
70 | static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = { | |
71 | { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */ | |
72 | { 0x00, 0x50, 0xf2, 0x04 }, /* AES */ | |
73 | }; | |
74 | static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = { | |
75 | { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */ | |
76 | { 0x00, 0x0f, 0xac, 0x04 }, /* AES */ | |
77 | }; | |
78 | ||
79 | /* | |
80 | * This function parses a given IE for a given OUI. | |
81 | * | |
82 | * This is used to parse a WPA/RSN IE to find if it has | |
83 | * a given oui in PTK. | |
84 | */ | |
85 | static u8 | |
86 | mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui) | |
87 | { | |
88 | u8 count; | |
89 | ||
90 | count = iebody->ptk_cnt[0]; | |
91 | ||
92 | /* There could be multiple OUIs for PTK hence | |
93 | 1) Take the length. | |
94 | 2) Check all the OUIs for AES. | |
95 | 3) If one of them is AES then pass success. */ | |
96 | while (count) { | |
97 | if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body))) | |
98 | return MWIFIEX_OUI_PRESENT; | |
99 | ||
100 | --count; | |
101 | if (count) | |
102 | iebody = (struct ie_body *) ((u8 *) iebody + | |
103 | sizeof(iebody->ptk_body)); | |
104 | } | |
105 | ||
106 | pr_debug("info: %s: OUI is not found in PTK\n", __func__); | |
107 | return MWIFIEX_OUI_NOT_PRESENT; | |
108 | } | |
109 | ||
110 | /* | |
111 | * This function checks if a given OUI is present in a RSN IE. | |
112 | * | |
113 | * The function first checks if a RSN IE is present or not in the | |
114 | * BSS descriptor. It tries to locate the OUI only if such an IE is | |
115 | * present. | |
116 | */ | |
117 | static u8 | |
118 | mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) | |
119 | { | |
120 | u8 *oui = NULL; | |
121 | struct ie_body *iebody = NULL; | |
122 | u8 ret = MWIFIEX_OUI_NOT_PRESENT; | |
123 | ||
124 | if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)). | |
125 | ieee_hdr.element_id == WLAN_EID_RSN))) { | |
126 | iebody = (struct ie_body *) | |
127 | (((u8 *) bss_desc->bcn_rsn_ie->data) + | |
128 | RSN_GTK_OUI_OFFSET); | |
129 | oui = &mwifiex_rsn_oui[cipher][0]; | |
130 | ret = mwifiex_search_oui_in_ie(iebody, oui); | |
131 | if (ret) | |
132 | return ret; | |
133 | } | |
134 | return ret; | |
135 | } | |
136 | ||
137 | /* | |
138 | * This function checks if a given OUI is present in a WPA IE. | |
139 | * | |
140 | * The function first checks if a WPA IE is present or not in the | |
141 | * BSS descriptor. It tries to locate the OUI only if such an IE is | |
142 | * present. | |
143 | */ | |
144 | static u8 | |
145 | mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher) | |
146 | { | |
147 | u8 *oui = NULL; | |
148 | struct ie_body *iebody = NULL; | |
149 | u8 ret = MWIFIEX_OUI_NOT_PRESENT; | |
150 | ||
151 | if (((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)). | |
152 | vend_hdr.element_id == WLAN_EID_WPA))) { | |
153 | iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data; | |
154 | oui = &mwifiex_wpa_oui[cipher][0]; | |
155 | ret = mwifiex_search_oui_in_ie(iebody, oui); | |
156 | if (ret) | |
157 | return ret; | |
158 | } | |
159 | return ret; | |
160 | } | |
161 | ||
162 | /* | |
163 | * This function compares two SSIDs and checks if they match. | |
164 | */ | |
165 | s32 | |
166 | mwifiex_ssid_cmp(struct mwifiex_802_11_ssid *ssid1, | |
167 | struct mwifiex_802_11_ssid *ssid2) | |
168 | { | |
169 | if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len)) | |
170 | return -1; | |
171 | return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len); | |
172 | } | |
173 | ||
174 | /* | |
175 | * Sends IOCTL request to get the best BSS. | |
176 | * | |
177 | * This function allocates the IOCTL request buffer, fills it | |
178 | * with requisite parameters and calls the IOCTL handler. | |
179 | */ | |
180 | int mwifiex_find_best_bss(struct mwifiex_private *priv, | |
181 | u8 wait_option, struct mwifiex_ssid_bssid *ssid_bssid) | |
182 | { | |
183 | struct mwifiex_wait_queue *wait = NULL; | |
184 | struct mwifiex_ssid_bssid tmp_ssid_bssid; | |
185 | int ret = 0; | |
186 | u8 *mac = NULL; | |
187 | ||
188 | if (!ssid_bssid) | |
189 | return -1; | |
190 | ||
191 | /* Allocate wait request buffer */ | |
192 | wait = mwifiex_alloc_fill_wait_queue(priv, wait_option); | |
193 | if (!wait) | |
194 | return -ENOMEM; | |
195 | ||
196 | memcpy(&tmp_ssid_bssid, ssid_bssid, | |
197 | sizeof(struct mwifiex_ssid_bssid)); | |
198 | ret = mwifiex_bss_ioctl_find_bss(priv, wait, &tmp_ssid_bssid); | |
199 | ||
200 | if (!ret) { | |
201 | memcpy(ssid_bssid, &tmp_ssid_bssid, | |
202 | sizeof(struct mwifiex_ssid_bssid)); | |
203 | mac = (u8 *) &ssid_bssid->bssid; | |
204 | dev_dbg(priv->adapter->dev, "cmd: found network: ssid=%s," | |
205 | " %pM\n", ssid_bssid->ssid.ssid, mac); | |
206 | } | |
207 | ||
208 | kfree(wait); | |
209 | return ret; | |
210 | } | |
211 | ||
212 | /* | |
213 | * Sends IOCTL request to start a scan with user configurations. | |
214 | * | |
215 | * This function allocates the IOCTL request buffer, fills it | |
216 | * with requisite parameters and calls the IOCTL handler. | |
217 | * | |
218 | * Upon completion, it also generates a wireless event to notify | |
219 | * applications. | |
220 | */ | |
221 | int mwifiex_set_user_scan_ioctl(struct mwifiex_private *priv, | |
222 | struct mwifiex_user_scan_cfg *scan_req) | |
223 | { | |
224 | struct mwifiex_wait_queue *wait = NULL; | |
225 | int status = 0; | |
226 | u8 wait_option = MWIFIEX_IOCTL_WAIT; | |
227 | ||
228 | /* Allocate an IOCTL request buffer */ | |
229 | wait = mwifiex_alloc_fill_wait_queue(priv, wait_option); | |
230 | if (!wait) | |
231 | return -ENOMEM; | |
232 | ||
233 | status = mwifiex_scan_networks(priv, wait, HostCmd_ACT_GEN_SET, | |
234 | scan_req, NULL); | |
235 | ||
236 | status = mwifiex_request_ioctl(priv, wait, status, wait_option); | |
237 | ||
238 | if (wait && (status != -EINPROGRESS)) | |
239 | kfree(wait); | |
240 | return status; | |
241 | } | |
242 | ||
243 | /* | |
244 | * This function checks if wapi is enabled in driver and scanned network is | |
245 | * compatible with it. | |
246 | */ | |
247 | static bool | |
248 | mwifiex_is_network_compatible_for_wapi(struct mwifiex_private *priv, | |
249 | struct mwifiex_bssdescriptor *bss_desc) | |
250 | { | |
251 | if (priv->sec_info.wapi_enabled && | |
252 | (bss_desc->bcn_wapi_ie && | |
253 | ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id == | |
254 | WLAN_EID_BSS_AC_ACCESS_DELAY))) { | |
255 | return true; | |
256 | } | |
257 | return false; | |
258 | } | |
259 | ||
260 | /* | |
261 | * This function checks if driver is configured with no security mode and | |
262 | * scanned network is compatible with it. | |
263 | */ | |
264 | static bool | |
265 | mwifiex_is_network_compatible_for_no_sec(struct mwifiex_private *priv, | |
266 | struct mwifiex_bssdescriptor *bss_desc) | |
267 | { | |
268 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED | |
269 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled | |
270 | && ((!bss_desc->bcn_wpa_ie) || | |
271 | ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id != | |
272 | WLAN_EID_WPA)) | |
273 | && ((!bss_desc->bcn_rsn_ie) || | |
274 | ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != | |
275 | WLAN_EID_RSN)) | |
276 | && priv->sec_info.encryption_mode == | |
277 | MWIFIEX_ENCRYPTION_MODE_NONE && !bss_desc->privacy) { | |
278 | return true; | |
279 | } | |
280 | return false; | |
281 | } | |
282 | ||
283 | /* | |
284 | * This function checks if static WEP is enabled in driver and scanned network | |
285 | * is compatible with it. | |
286 | */ | |
287 | static bool | |
288 | mwifiex_is_network_compatible_for_static_wep(struct mwifiex_private *priv, | |
289 | struct mwifiex_bssdescriptor *bss_desc) | |
290 | { | |
291 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_ENABLED | |
292 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled | |
293 | && bss_desc->privacy) { | |
294 | return true; | |
295 | } | |
296 | return false; | |
297 | } | |
298 | ||
299 | /* | |
300 | * This function checks if wpa is enabled in driver and scanned network is | |
301 | * compatible with it. | |
302 | */ | |
303 | static bool | |
304 | mwifiex_is_network_compatible_for_wpa(struct mwifiex_private *priv, | |
305 | struct mwifiex_bssdescriptor *bss_desc, | |
306 | int index) | |
307 | { | |
308 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED | |
309 | && priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled | |
310 | && ((bss_desc->bcn_wpa_ie) && ((*(bss_desc->bcn_wpa_ie)).vend_hdr. | |
311 | element_id == WLAN_EID_WPA)) | |
312 | /* | |
313 | * Privacy bit may NOT be set in some APs like | |
314 | * LinkSys WRT54G && bss_desc->privacy | |
315 | */ | |
316 | ) { | |
317 | dev_dbg(priv->adapter->dev, "info: %s: WPA: index=%d" | |
318 | " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " | |
319 | "EncMode=%#x privacy=%#x\n", __func__, index, | |
320 | (bss_desc->bcn_wpa_ie) ? | |
321 | (*(bss_desc->bcn_wpa_ie)). | |
322 | vend_hdr.element_id : 0, | |
323 | (bss_desc->bcn_rsn_ie) ? | |
324 | (*(bss_desc->bcn_rsn_ie)). | |
325 | ieee_hdr.element_id : 0, | |
326 | (priv->sec_info.wep_status == | |
327 | MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d", | |
328 | (priv->sec_info.wpa_enabled) ? "e" : "d", | |
329 | (priv->sec_info.wpa2_enabled) ? "e" : "d", | |
330 | priv->sec_info.encryption_mode, | |
331 | bss_desc->privacy); | |
332 | return true; | |
333 | } | |
334 | return false; | |
335 | } | |
336 | ||
337 | /* | |
338 | * This function checks if wpa2 is enabled in driver and scanned network is | |
339 | * compatible with it. | |
340 | */ | |
341 | static bool | |
342 | mwifiex_is_network_compatible_for_wpa2(struct mwifiex_private *priv, | |
343 | struct mwifiex_bssdescriptor *bss_desc, | |
344 | int index) | |
345 | { | |
346 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED | |
347 | && !priv->sec_info.wpa_enabled && priv->sec_info.wpa2_enabled | |
348 | && ((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).ieee_hdr. | |
349 | element_id == WLAN_EID_RSN)) | |
350 | /* | |
351 | * Privacy bit may NOT be set in some APs like | |
352 | * LinkSys WRT54G && bss_desc->privacy | |
353 | */ | |
354 | ) { | |
355 | dev_dbg(priv->adapter->dev, "info: %s: WPA2: index=%d" | |
356 | " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s " | |
357 | "EncMode=%#x privacy=%#x\n", __func__, index, | |
358 | (bss_desc->bcn_wpa_ie) ? | |
359 | (*(bss_desc->bcn_wpa_ie)). | |
360 | vend_hdr.element_id : 0, | |
361 | (bss_desc->bcn_rsn_ie) ? | |
362 | (*(bss_desc->bcn_rsn_ie)). | |
363 | ieee_hdr.element_id : 0, | |
364 | (priv->sec_info.wep_status == | |
365 | MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d", | |
366 | (priv->sec_info.wpa_enabled) ? "e" : "d", | |
367 | (priv->sec_info.wpa2_enabled) ? "e" : "d", | |
368 | priv->sec_info.encryption_mode, | |
369 | bss_desc->privacy); | |
370 | return true; | |
371 | } | |
372 | return false; | |
373 | } | |
374 | ||
375 | /* | |
376 | * This function checks if adhoc AES is enabled in driver and scanned network is | |
377 | * compatible with it. | |
378 | */ | |
379 | static bool | |
380 | mwifiex_is_network_compatible_for_adhoc_aes(struct mwifiex_private *priv, | |
381 | struct mwifiex_bssdescriptor *bss_desc) | |
382 | { | |
383 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED | |
384 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled | |
385 | && ((!bss_desc->bcn_wpa_ie) || ((*(bss_desc->bcn_wpa_ie)).vend_hdr. | |
386 | element_id != WLAN_EID_WPA)) | |
387 | && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr. | |
388 | element_id != WLAN_EID_RSN)) | |
389 | && priv->sec_info.encryption_mode == | |
390 | MWIFIEX_ENCRYPTION_MODE_NONE && bss_desc->privacy) { | |
391 | return true; | |
392 | } | |
393 | return false; | |
394 | } | |
395 | ||
396 | /* | |
397 | * This function checks if dynamic WEP is enabled in driver and scanned network | |
398 | * is compatible with it. | |
399 | */ | |
400 | static bool | |
401 | mwifiex_is_network_compatible_for_dynamic_wep(struct mwifiex_private *priv, | |
402 | struct mwifiex_bssdescriptor *bss_desc, | |
403 | int index) | |
404 | { | |
405 | if (priv->sec_info.wep_status == MWIFIEX_802_11_WEP_DISABLED | |
406 | && !priv->sec_info.wpa_enabled && !priv->sec_info.wpa2_enabled | |
407 | && ((!bss_desc->bcn_wpa_ie) || ((*(bss_desc->bcn_wpa_ie)).vend_hdr. | |
408 | element_id != WLAN_EID_WPA)) | |
409 | && ((!bss_desc->bcn_rsn_ie) || ((*(bss_desc->bcn_rsn_ie)).ieee_hdr. | |
410 | element_id != WLAN_EID_RSN)) | |
411 | && priv->sec_info.encryption_mode != | |
412 | MWIFIEX_ENCRYPTION_MODE_NONE && bss_desc->privacy) { | |
413 | dev_dbg(priv->adapter->dev, "info: %s: dynamic " | |
414 | "WEP: index=%d wpa_ie=%#x wpa2_ie=%#x " | |
415 | "EncMode=%#x privacy=%#x\n", | |
416 | __func__, index, | |
417 | (bss_desc->bcn_wpa_ie) ? | |
418 | (*(bss_desc->bcn_wpa_ie)). | |
419 | vend_hdr.element_id : 0, | |
420 | (bss_desc->bcn_rsn_ie) ? | |
421 | (*(bss_desc->bcn_rsn_ie)). | |
422 | ieee_hdr.element_id : 0, | |
423 | priv->sec_info.encryption_mode, | |
424 | bss_desc->privacy); | |
425 | return true; | |
426 | } | |
427 | return false; | |
428 | } | |
429 | ||
430 | /* | |
431 | * This function checks if a scanned network is compatible with the driver | |
432 | * settings. | |
433 | * | |
434 | * WEP WPA WPA2 ad-hoc encrypt Network | |
435 | * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible | |
436 | * 0 0 0 0 NONE 0 0 0 yes No security | |
437 | * 0 1 0 0 x 1x 1 x yes WPA (disable | |
438 | * HT if no AES) | |
439 | * 0 0 1 0 x 1x x 1 yes WPA2 (disable | |
440 | * HT if no AES) | |
441 | * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES | |
442 | * 1 0 0 0 NONE 1 0 0 yes Static WEP | |
443 | * (disable HT) | |
444 | * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP | |
445 | * | |
446 | * Compatibility is not matched while roaming, except for mode. | |
447 | */ | |
448 | static s32 | |
449 | mwifiex_is_network_compatible(struct mwifiex_private *priv, u32 index, u32 mode) | |
450 | { | |
451 | struct mwifiex_adapter *adapter = priv->adapter; | |
452 | struct mwifiex_bssdescriptor *bss_desc; | |
453 | ||
454 | bss_desc = &adapter->scan_table[index]; | |
455 | bss_desc->disable_11n = false; | |
456 | ||
457 | /* Don't check for compatibility if roaming */ | |
eecd8250 BZ |
458 | if (priv->media_connected && (priv->bss_mode == NL80211_IFTYPE_STATION) |
459 | && (bss_desc->bss_mode == NL80211_IFTYPE_STATION)) | |
5e6e3a92 BZ |
460 | return index; |
461 | ||
462 | if (priv->wps.session_enable) { | |
463 | dev_dbg(adapter->dev, | |
464 | "info: return success directly in WPS period\n"); | |
465 | return index; | |
466 | } | |
467 | ||
468 | if (mwifiex_is_network_compatible_for_wapi(priv, bss_desc)) { | |
469 | dev_dbg(adapter->dev, "info: return success for WAPI AP\n"); | |
470 | return index; | |
471 | } | |
472 | ||
473 | if (bss_desc->bss_mode == mode) { | |
474 | if (mwifiex_is_network_compatible_for_no_sec(priv, bss_desc)) { | |
475 | /* No security */ | |
476 | return index; | |
477 | } else if (mwifiex_is_network_compatible_for_static_wep(priv, | |
478 | bss_desc)) { | |
479 | /* Static WEP enabled */ | |
480 | dev_dbg(adapter->dev, "info: Disable 11n in WEP mode.\n"); | |
481 | bss_desc->disable_11n = true; | |
482 | return index; | |
483 | } else if (mwifiex_is_network_compatible_for_wpa(priv, bss_desc, | |
484 | index)) { | |
485 | /* WPA enabled */ | |
486 | if (((priv->adapter->config_bands & BAND_GN | |
487 | || priv->adapter->config_bands & BAND_AN) | |
488 | && bss_desc->bcn_ht_cap) | |
489 | && !mwifiex_is_wpa_oui_present(bss_desc, | |
490 | CIPHER_SUITE_CCMP)) { | |
491 | ||
492 | if (mwifiex_is_wpa_oui_present(bss_desc, | |
493 | CIPHER_SUITE_TKIP)) { | |
494 | dev_dbg(adapter->dev, | |
495 | "info: Disable 11n if AES " | |
496 | "is not supported by AP\n"); | |
497 | bss_desc->disable_11n = true; | |
498 | } else { | |
499 | return -1; | |
500 | } | |
501 | } | |
502 | return index; | |
503 | } else if (mwifiex_is_network_compatible_for_wpa2(priv, | |
504 | bss_desc, index)) { | |
505 | /* WPA2 enabled */ | |
506 | if (((priv->adapter->config_bands & BAND_GN | |
507 | || priv->adapter->config_bands & BAND_AN) | |
508 | && bss_desc->bcn_ht_cap) | |
509 | && !mwifiex_is_rsn_oui_present(bss_desc, | |
510 | CIPHER_SUITE_CCMP)) { | |
511 | ||
512 | if (mwifiex_is_rsn_oui_present(bss_desc, | |
513 | CIPHER_SUITE_TKIP)) { | |
514 | dev_dbg(adapter->dev, | |
515 | "info: Disable 11n if AES " | |
516 | "is not supported by AP\n"); | |
517 | bss_desc->disable_11n = true; | |
518 | } else { | |
519 | return -1; | |
520 | } | |
521 | } | |
522 | return index; | |
523 | } else if (mwifiex_is_network_compatible_for_adhoc_aes(priv, | |
524 | bss_desc)) { | |
525 | /* Ad-hoc AES enabled */ | |
526 | return index; | |
527 | } else if (mwifiex_is_network_compatible_for_dynamic_wep(priv, | |
528 | bss_desc, index)) { | |
529 | /* Dynamic WEP enabled */ | |
530 | return index; | |
531 | } | |
532 | ||
533 | /* Security doesn't match */ | |
534 | dev_dbg(adapter->dev, "info: %s: failed: index=%d " | |
535 | "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s EncMode" | |
536 | "=%#x privacy=%#x\n", | |
537 | __func__, index, | |
538 | (bss_desc->bcn_wpa_ie) ? | |
539 | (*(bss_desc->bcn_wpa_ie)).vend_hdr. | |
540 | element_id : 0, | |
541 | (bss_desc->bcn_rsn_ie) ? | |
542 | (*(bss_desc->bcn_rsn_ie)).ieee_hdr. | |
543 | element_id : 0, | |
544 | (priv->sec_info.wep_status == | |
545 | MWIFIEX_802_11_WEP_ENABLED) ? "e" : "d", | |
546 | (priv->sec_info.wpa_enabled) ? "e" : "d", | |
547 | (priv->sec_info.wpa2_enabled) ? "e" : "d", | |
548 | priv->sec_info.encryption_mode, bss_desc->privacy); | |
549 | return -1; | |
550 | } | |
551 | ||
552 | /* Mode doesn't match */ | |
553 | return -1; | |
554 | } | |
555 | ||
556 | /* | |
557 | * This function finds the best SSID in the scan list. | |
558 | * | |
559 | * It searches the scan table for the best SSID that also matches the current | |
560 | * adapter network preference (mode, security etc.). | |
561 | */ | |
562 | static s32 | |
563 | mwifiex_find_best_network_in_list(struct mwifiex_private *priv) | |
564 | { | |
565 | struct mwifiex_adapter *adapter = priv->adapter; | |
566 | u32 mode = priv->bss_mode; | |
567 | s32 best_net = -1; | |
568 | s32 best_rssi = 0; | |
569 | u32 i; | |
570 | ||
571 | dev_dbg(adapter->dev, "info: num of BSSIDs = %d\n", | |
572 | adapter->num_in_scan_table); | |
573 | ||
574 | for (i = 0; i < adapter->num_in_scan_table; i++) { | |
575 | switch (mode) { | |
eecd8250 BZ |
576 | case NL80211_IFTYPE_STATION: |
577 | case NL80211_IFTYPE_ADHOC: | |
5e6e3a92 BZ |
578 | if (mwifiex_is_network_compatible(priv, i, mode) >= 0) { |
579 | if (SCAN_RSSI(adapter->scan_table[i].rssi) > | |
580 | best_rssi) { | |
581 | best_rssi = SCAN_RSSI(adapter-> | |
582 | scan_table[i].rssi); | |
583 | best_net = i; | |
584 | } | |
585 | } | |
586 | break; | |
eecd8250 | 587 | case NL80211_IFTYPE_UNSPECIFIED: |
5e6e3a92 BZ |
588 | default: |
589 | if (SCAN_RSSI(adapter->scan_table[i].rssi) > | |
590 | best_rssi) { | |
591 | best_rssi = SCAN_RSSI(adapter->scan_table[i]. | |
592 | rssi); | |
593 | best_net = i; | |
594 | } | |
595 | break; | |
596 | } | |
597 | } | |
598 | ||
599 | return best_net; | |
600 | } | |
601 | ||
602 | /* | |
603 | * This function creates a channel list for the driver to scan, based | |
604 | * on region/band information. | |
605 | * | |
606 | * This routine is used for any scan that is not provided with a | |
607 | * specific channel list to scan. | |
608 | */ | |
609 | static void | |
610 | mwifiex_scan_create_channel_list(struct mwifiex_private *priv, | |
611 | const struct mwifiex_user_scan_cfg | |
612 | *user_scan_in, | |
613 | struct mwifiex_chan_scan_param_set | |
614 | *scan_chan_list, | |
615 | u8 filtered_scan) | |
616 | { | |
617 | enum ieee80211_band band; | |
618 | struct ieee80211_supported_band *sband; | |
619 | struct ieee80211_channel *ch; | |
620 | struct mwifiex_adapter *adapter = priv->adapter; | |
621 | int chan_idx = 0, i; | |
622 | u8 scan_type; | |
623 | ||
624 | for (band = 0; (band < IEEE80211_NUM_BANDS) ; band++) { | |
625 | ||
626 | if (!priv->wdev->wiphy->bands[band]) | |
627 | continue; | |
628 | ||
629 | sband = priv->wdev->wiphy->bands[band]; | |
630 | ||
631 | for (i = 0; (i < sband->n_channels) ; i++, chan_idx++) { | |
632 | ch = &sband->channels[i]; | |
633 | if (ch->flags & IEEE80211_CHAN_DISABLED) | |
634 | continue; | |
635 | scan_chan_list[chan_idx].radio_type = band; | |
636 | scan_type = ch->flags & IEEE80211_CHAN_PASSIVE_SCAN; | |
637 | if (user_scan_in && | |
638 | user_scan_in->chan_list[0].scan_time) | |
639 | scan_chan_list[chan_idx].max_scan_time = | |
640 | cpu_to_le16((u16) user_scan_in-> | |
641 | chan_list[0].scan_time); | |
642 | else if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) | |
643 | scan_chan_list[chan_idx].max_scan_time = | |
644 | cpu_to_le16(adapter->passive_scan_time); | |
645 | else | |
646 | scan_chan_list[chan_idx].max_scan_time = | |
647 | cpu_to_le16(adapter->active_scan_time); | |
648 | if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) | |
649 | scan_chan_list[chan_idx].chan_scan_mode_bitmap | |
650 | |= MWIFIEX_PASSIVE_SCAN; | |
651 | else | |
652 | scan_chan_list[chan_idx].chan_scan_mode_bitmap | |
653 | &= ~MWIFIEX_PASSIVE_SCAN; | |
654 | scan_chan_list[chan_idx].chan_number = | |
655 | (u32) ch->hw_value; | |
656 | if (filtered_scan) { | |
657 | scan_chan_list[chan_idx].max_scan_time = | |
658 | cpu_to_le16(adapter->specific_scan_time); | |
659 | scan_chan_list[chan_idx].chan_scan_mode_bitmap | |
660 | |= MWIFIEX_DISABLE_CHAN_FILT; | |
661 | } | |
662 | } | |
663 | ||
664 | } | |
665 | } | |
666 | ||
667 | /* | |
668 | * This function constructs and sends multiple scan config commands to | |
669 | * the firmware. | |
670 | * | |
671 | * Previous routines in the code flow have created a scan command configuration | |
672 | * with any requested TLVs. This function splits the channel TLV into maximum | |
673 | * channels supported per scan lists and sends the portion of the channel TLV, | |
674 | * along with the other TLVs, to the firmware. | |
675 | */ | |
676 | static int | |
677 | mwifiex_scan_channel_list(struct mwifiex_private *priv, void *wait_buf, | |
678 | u32 max_chan_per_scan, u8 filtered_scan, | |
679 | struct mwifiex_scan_cmd_config *scan_cfg_out, | |
680 | struct mwifiex_ie_types_chan_list_param_set | |
681 | *chan_tlv_out, | |
682 | struct mwifiex_chan_scan_param_set *scan_chan_list) | |
683 | { | |
684 | int ret = 0; | |
685 | struct mwifiex_chan_scan_param_set *tmp_chan_list; | |
686 | struct mwifiex_chan_scan_param_set *start_chan; | |
687 | ||
688 | u32 tlv_idx; | |
689 | u32 total_scan_time; | |
690 | u32 done_early; | |
691 | ||
692 | if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) { | |
693 | dev_dbg(priv->adapter->dev, | |
694 | "info: Scan: Null detect: %p, %p, %p\n", | |
695 | scan_cfg_out, chan_tlv_out, scan_chan_list); | |
696 | return -1; | |
697 | } | |
698 | ||
699 | chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST); | |
700 | ||
701 | /* Set the temp channel struct pointer to the start of the desired | |
702 | list */ | |
703 | tmp_chan_list = scan_chan_list; | |
704 | ||
705 | /* Loop through the desired channel list, sending a new firmware scan | |
706 | commands for each max_chan_per_scan channels (or for 1,6,11 | |
707 | individually if configured accordingly) */ | |
708 | while (tmp_chan_list->chan_number) { | |
709 | ||
710 | tlv_idx = 0; | |
711 | total_scan_time = 0; | |
712 | chan_tlv_out->header.len = 0; | |
713 | start_chan = tmp_chan_list; | |
714 | done_early = false; | |
715 | ||
716 | /* | |
717 | * Construct the Channel TLV for the scan command. Continue to | |
718 | * insert channel TLVs until: | |
719 | * - the tlv_idx hits the maximum configured per scan command | |
720 | * - the next channel to insert is 0 (end of desired channel | |
721 | * list) | |
722 | * - done_early is set (controlling individual scanning of | |
723 | * 1,6,11) | |
724 | */ | |
725 | while (tlv_idx < max_chan_per_scan | |
726 | && tmp_chan_list->chan_number && !done_early) { | |
727 | ||
728 | dev_dbg(priv->adapter->dev, | |
729 | "info: Scan: Chan(%3d), Radio(%d)," | |
730 | " Mode(%d, %d), Dur(%d)\n", | |
731 | tmp_chan_list->chan_number, | |
732 | tmp_chan_list->radio_type, | |
733 | tmp_chan_list->chan_scan_mode_bitmap | |
734 | & MWIFIEX_PASSIVE_SCAN, | |
735 | (tmp_chan_list->chan_scan_mode_bitmap | |
736 | & MWIFIEX_DISABLE_CHAN_FILT) >> 1, | |
737 | le16_to_cpu(tmp_chan_list->max_scan_time)); | |
738 | ||
739 | /* Copy the current channel TLV to the command being | |
740 | prepared */ | |
741 | memcpy(chan_tlv_out->chan_scan_param + tlv_idx, | |
742 | tmp_chan_list, | |
743 | sizeof(chan_tlv_out->chan_scan_param)); | |
744 | ||
745 | /* Increment the TLV header length by the size | |
746 | appended */ | |
747 | chan_tlv_out->header.len = | |
748 | cpu_to_le16(le16_to_cpu(chan_tlv_out->header.len) + | |
749 | (sizeof(chan_tlv_out->chan_scan_param))); | |
750 | ||
751 | /* | |
752 | * The tlv buffer length is set to the number of bytes | |
753 | * of the between the channel tlv pointer and the start | |
754 | * of the tlv buffer. This compensates for any TLVs | |
755 | * that were appended before the channel list. | |
756 | */ | |
757 | scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out - | |
758 | scan_cfg_out->tlv_buf); | |
759 | ||
760 | /* Add the size of the channel tlv header and the data | |
761 | length */ | |
762 | scan_cfg_out->tlv_buf_len += | |
763 | (sizeof(chan_tlv_out->header) | |
764 | + le16_to_cpu(chan_tlv_out->header.len)); | |
765 | ||
766 | /* Increment the index to the channel tlv we are | |
767 | constructing */ | |
768 | tlv_idx++; | |
769 | ||
770 | /* Count the total scan time per command */ | |
771 | total_scan_time += | |
772 | le16_to_cpu(tmp_chan_list->max_scan_time); | |
773 | ||
774 | done_early = false; | |
775 | ||
776 | /* Stop the loop if the *current* channel is in the | |
777 | 1,6,11 set and we are not filtering on a BSSID | |
778 | or SSID. */ | |
779 | if (!filtered_scan && (tmp_chan_list->chan_number == 1 | |
780 | || tmp_chan_list->chan_number == 6 | |
781 | || tmp_chan_list->chan_number == 11)) | |
782 | done_early = true; | |
783 | ||
784 | /* Increment the tmp pointer to the next channel to | |
785 | be scanned */ | |
786 | tmp_chan_list++; | |
787 | ||
788 | /* Stop the loop if the *next* channel is in the 1,6,11 | |
789 | set. This will cause it to be the only channel | |
790 | scanned on the next interation */ | |
791 | if (!filtered_scan && (tmp_chan_list->chan_number == 1 | |
792 | || tmp_chan_list->chan_number == 6 | |
793 | || tmp_chan_list->chan_number == 11)) | |
794 | done_early = true; | |
795 | } | |
796 | ||
797 | /* The total scan time should be less than scan command timeout | |
798 | value */ | |
799 | if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) { | |
800 | dev_err(priv->adapter->dev, "total scan time %dms" | |
801 | " is over limit (%dms), scan skipped\n", | |
802 | total_scan_time, MWIFIEX_MAX_TOTAL_SCAN_TIME); | |
803 | ret = -1; | |
804 | break; | |
805 | } | |
806 | ||
807 | priv->adapter->scan_channels = start_chan; | |
808 | ||
809 | /* Send the scan command to the firmware with the specified | |
810 | cfg */ | |
811 | ret = mwifiex_prepare_cmd(priv, HostCmd_CMD_802_11_SCAN, | |
812 | HostCmd_ACT_GEN_SET, | |
813 | 0, wait_buf, scan_cfg_out); | |
814 | if (ret) | |
815 | break; | |
816 | } | |
817 | ||
818 | if (ret) | |
819 | return -1; | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | /* | |
825 | * This function constructs a scan command configuration structure to use | |
826 | * in scan commands. | |
827 | * | |
828 | * Application layer or other functions can invoke network scanning | |
829 | * with a scan configuration supplied in a user scan configuration structure. | |
830 | * This structure is used as the basis of one or many scan command configuration | |
831 | * commands that are sent to the command processing module and eventually to the | |
832 | * firmware. | |
833 | * | |
834 | * This function creates a scan command configuration structure based on the | |
835 | * following user supplied parameters (if present): | |
836 | * - SSID filter | |
837 | * - BSSID filter | |
838 | * - Number of Probes to be sent | |
839 | * - Channel list | |
840 | * | |
841 | * If the SSID or BSSID filter is not present, the filter is disabled/cleared. | |
842 | * If the number of probes is not set, adapter default setting is used. | |
843 | */ | |
844 | static void | |
845 | mwifiex_scan_setup_scan_config(struct mwifiex_private *priv, | |
846 | const struct mwifiex_user_scan_cfg *user_scan_in, | |
847 | struct mwifiex_scan_cmd_config *scan_cfg_out, | |
848 | struct mwifiex_ie_types_chan_list_param_set | |
849 | **chan_list_out, | |
850 | struct mwifiex_chan_scan_param_set | |
851 | *scan_chan_list, | |
852 | u8 *max_chan_per_scan, u8 *filtered_scan, | |
853 | u8 *scan_current_only) | |
854 | { | |
855 | struct mwifiex_adapter *adapter = priv->adapter; | |
856 | struct mwifiex_ie_types_num_probes *num_probes_tlv; | |
857 | struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv; | |
858 | struct mwifiex_ie_types_rates_param_set *rates_tlv; | |
859 | const u8 zero_mac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 }; | |
860 | u8 *tlv_pos; | |
861 | u32 num_probes; | |
862 | u32 ssid_len; | |
863 | u32 chan_idx; | |
864 | u32 scan_type; | |
865 | u16 scan_dur; | |
866 | u8 channel; | |
867 | u8 radio_type; | |
868 | u32 ssid_idx; | |
869 | u8 ssid_filter; | |
870 | u8 rates[MWIFIEX_SUPPORTED_RATES]; | |
871 | u32 rates_size; | |
872 | struct mwifiex_ie_types_htcap *ht_cap; | |
873 | ||
874 | /* The tlv_buf_len is calculated for each scan command. The TLVs added | |
875 | in this routine will be preserved since the routine that sends the | |
876 | command will append channelTLVs at *chan_list_out. The difference | |
877 | between the *chan_list_out and the tlv_buf start will be used to | |
878 | calculate the size of anything we add in this routine. */ | |
879 | scan_cfg_out->tlv_buf_len = 0; | |
880 | ||
881 | /* Running tlv pointer. Assigned to chan_list_out at end of function | |
882 | so later routines know where channels can be added to the command | |
883 | buf */ | |
884 | tlv_pos = scan_cfg_out->tlv_buf; | |
885 | ||
886 | /* Initialize the scan as un-filtered; the flag is later set to TRUE | |
887 | below if a SSID or BSSID filter is sent in the command */ | |
888 | *filtered_scan = false; | |
889 | ||
890 | /* Initialize the scan as not being only on the current channel. If | |
891 | the channel list is customized, only contains one channel, and is | |
892 | the active channel, this is set true and data flow is not halted. */ | |
893 | *scan_current_only = false; | |
894 | ||
895 | if (user_scan_in) { | |
896 | ||
897 | /* Default the ssid_filter flag to TRUE, set false under | |
898 | certain wildcard conditions and qualified by the existence | |
899 | of an SSID list before marking the scan as filtered */ | |
900 | ssid_filter = true; | |
901 | ||
902 | /* Set the BSS type scan filter, use Adapter setting if | |
903 | unset */ | |
904 | scan_cfg_out->bss_mode = | |
905 | (user_scan_in->bss_mode ? (u8) user_scan_in-> | |
906 | bss_mode : (u8) adapter->scan_mode); | |
907 | ||
908 | /* Set the number of probes to send, use Adapter setting | |
909 | if unset */ | |
910 | num_probes = | |
911 | (user_scan_in->num_probes ? user_scan_in-> | |
912 | num_probes : adapter->scan_probes); | |
913 | ||
914 | /* | |
915 | * Set the BSSID filter to the incoming configuration, | |
916 | * if non-zero. If not set, it will remain disabled | |
917 | * (all zeros). | |
918 | */ | |
919 | memcpy(scan_cfg_out->specific_bssid, | |
920 | user_scan_in->specific_bssid, | |
921 | sizeof(scan_cfg_out->specific_bssid)); | |
922 | ||
923 | for (ssid_idx = 0; | |
924 | ((ssid_idx < ARRAY_SIZE(user_scan_in->ssid_list)) | |
925 | && (*user_scan_in->ssid_list[ssid_idx].ssid | |
926 | || user_scan_in->ssid_list[ssid_idx].max_len)); | |
927 | ssid_idx++) { | |
928 | ||
929 | ssid_len = strlen(user_scan_in->ssid_list[ssid_idx]. | |
930 | ssid) + 1; | |
931 | ||
932 | wildcard_ssid_tlv = | |
933 | (struct mwifiex_ie_types_wildcard_ssid_params *) | |
934 | tlv_pos; | |
935 | wildcard_ssid_tlv->header.type = | |
936 | cpu_to_le16(TLV_TYPE_WILDCARDSSID); | |
937 | wildcard_ssid_tlv->header.len = cpu_to_le16( | |
938 | (u16) (ssid_len + sizeof(wildcard_ssid_tlv-> | |
939 | max_ssid_length))); | |
940 | wildcard_ssid_tlv->max_ssid_length = | |
941 | user_scan_in->ssid_list[ssid_idx].max_len; | |
942 | ||
943 | memcpy(wildcard_ssid_tlv->ssid, | |
944 | user_scan_in->ssid_list[ssid_idx].ssid, | |
945 | ssid_len); | |
946 | ||
947 | tlv_pos += (sizeof(wildcard_ssid_tlv->header) | |
948 | + le16_to_cpu(wildcard_ssid_tlv->header.len)); | |
949 | ||
950 | dev_dbg(adapter->dev, "info: scan: ssid_list[%d]: %s, %d\n", | |
951 | ssid_idx, wildcard_ssid_tlv->ssid, | |
952 | wildcard_ssid_tlv->max_ssid_length); | |
953 | ||
954 | /* Empty wildcard ssid with a maxlen will match many or | |
955 | potentially all SSIDs (maxlen == 32), therefore do | |
956 | not treat the scan as | |
957 | filtered. */ | |
958 | if (!ssid_len && wildcard_ssid_tlv->max_ssid_length) | |
959 | ssid_filter = false; | |
960 | ||
961 | } | |
962 | ||
963 | /* | |
964 | * The default number of channels sent in the command is low to | |
965 | * ensure the response buffer from the firmware does not | |
966 | * truncate scan results. That is not an issue with an SSID | |
967 | * or BSSID filter applied to the scan results in the firmware. | |
968 | */ | |
969 | if ((ssid_idx && ssid_filter) | |
970 | || memcmp(scan_cfg_out->specific_bssid, &zero_mac, | |
971 | sizeof(zero_mac))) | |
972 | *filtered_scan = true; | |
973 | } else { | |
974 | scan_cfg_out->bss_mode = (u8) adapter->scan_mode; | |
975 | num_probes = adapter->scan_probes; | |
976 | } | |
977 | ||
978 | /* | |
979 | * If a specific BSSID or SSID is used, the number of channels in the | |
980 | * scan command will be increased to the absolute maximum. | |
981 | */ | |
982 | if (*filtered_scan) | |
983 | *max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN; | |
984 | else | |
985 | *max_chan_per_scan = MWIFIEX_CHANNELS_PER_SCAN_CMD; | |
986 | ||
987 | /* If the input config or adapter has the number of Probes set, | |
988 | add tlv */ | |
989 | if (num_probes) { | |
990 | ||
991 | dev_dbg(adapter->dev, "info: scan: num_probes = %d\n", | |
992 | num_probes); | |
993 | ||
994 | num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos; | |
995 | num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES); | |
996 | num_probes_tlv->header.len = | |
997 | cpu_to_le16(sizeof(num_probes_tlv->num_probes)); | |
998 | num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes); | |
999 | ||
1000 | tlv_pos += sizeof(num_probes_tlv->header) + | |
1001 | le16_to_cpu(num_probes_tlv->header.len); | |
1002 | ||
1003 | } | |
1004 | ||
1005 | /* Append rates tlv */ | |
1006 | memset(rates, 0, sizeof(rates)); | |
1007 | ||
1008 | rates_size = mwifiex_get_supported_rates(priv, rates); | |
1009 | ||
1010 | rates_tlv = (struct mwifiex_ie_types_rates_param_set *) tlv_pos; | |
1011 | rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES); | |
1012 | rates_tlv->header.len = cpu_to_le16((u16) rates_size); | |
1013 | memcpy(rates_tlv->rates, rates, rates_size); | |
1014 | tlv_pos += sizeof(rates_tlv->header) + rates_size; | |
1015 | ||
1016 | dev_dbg(adapter->dev, "info: SCAN_CMD: Rates size = %d\n", rates_size); | |
1017 | ||
1018 | if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) | |
1019 | && (priv->adapter->config_bands & BAND_GN | |
1020 | || priv->adapter->config_bands & BAND_AN)) { | |
1021 | ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos; | |
1022 | memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap)); | |
1023 | ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY); | |
1024 | ht_cap->header.len = | |
1025 | cpu_to_le16(sizeof(struct ieee80211_ht_cap)); | |
1026 | mwifiex_fill_cap_info(priv, ht_cap); | |
1027 | tlv_pos += sizeof(struct mwifiex_ie_types_htcap); | |
1028 | } | |
1029 | ||
1030 | /* Append vendor specific IE TLV */ | |
1031 | mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos); | |
1032 | ||
1033 | /* | |
1034 | * Set the output for the channel TLV to the address in the tlv buffer | |
1035 | * past any TLVs that were added in this function (SSID, num_probes). | |
1036 | * Channel TLVs will be added past this for each scan command, | |
1037 | * preserving the TLVs that were previously added. | |
1038 | */ | |
1039 | *chan_list_out = | |
1040 | (struct mwifiex_ie_types_chan_list_param_set *) tlv_pos; | |
1041 | ||
1042 | if (user_scan_in && user_scan_in->chan_list[0].chan_number) { | |
1043 | ||
1044 | dev_dbg(adapter->dev, "info: Scan: Using supplied channel list\n"); | |
1045 | ||
1046 | for (chan_idx = 0; | |
1047 | chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX | |
1048 | && user_scan_in->chan_list[chan_idx].chan_number; | |
1049 | chan_idx++) { | |
1050 | ||
1051 | channel = user_scan_in->chan_list[chan_idx].chan_number; | |
1052 | (scan_chan_list + chan_idx)->chan_number = channel; | |
1053 | ||
1054 | radio_type = | |
1055 | user_scan_in->chan_list[chan_idx].radio_type; | |
1056 | (scan_chan_list + chan_idx)->radio_type = radio_type; | |
1057 | ||
1058 | scan_type = user_scan_in->chan_list[chan_idx].scan_type; | |
1059 | ||
1060 | if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) | |
1061 | (scan_chan_list + | |
1062 | chan_idx)->chan_scan_mode_bitmap | |
1063 | |= MWIFIEX_PASSIVE_SCAN; | |
1064 | else | |
1065 | (scan_chan_list + | |
1066 | chan_idx)->chan_scan_mode_bitmap | |
1067 | &= ~MWIFIEX_PASSIVE_SCAN; | |
1068 | ||
1069 | if (user_scan_in->chan_list[chan_idx].scan_time) { | |
1070 | scan_dur = (u16) user_scan_in-> | |
1071 | chan_list[chan_idx].scan_time; | |
1072 | } else { | |
1073 | if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE) | |
1074 | scan_dur = adapter->passive_scan_time; | |
1075 | else if (*filtered_scan) | |
1076 | scan_dur = adapter->specific_scan_time; | |
1077 | else | |
1078 | scan_dur = adapter->active_scan_time; | |
1079 | } | |
1080 | ||
1081 | (scan_chan_list + chan_idx)->min_scan_time = | |
1082 | cpu_to_le16(scan_dur); | |
1083 | (scan_chan_list + chan_idx)->max_scan_time = | |
1084 | cpu_to_le16(scan_dur); | |
1085 | } | |
1086 | ||
1087 | /* Check if we are only scanning the current channel */ | |
1088 | if ((chan_idx == 1) | |
1089 | && (user_scan_in->chan_list[0].chan_number | |
1090 | == priv->curr_bss_params.bss_descriptor.channel)) { | |
1091 | *scan_current_only = true; | |
1092 | dev_dbg(adapter->dev, | |
1093 | "info: Scan: Scanning current channel only\n"); | |
1094 | } | |
1095 | ||
1096 | } else { | |
1097 | dev_dbg(adapter->dev, | |
1098 | "info: Scan: Creating full region channel list\n"); | |
1099 | mwifiex_scan_create_channel_list(priv, user_scan_in, | |
1100 | scan_chan_list, | |
1101 | *filtered_scan); | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * This function inspects the scan response buffer for pointers to | |
1107 | * expected TLVs. | |
1108 | * | |
1109 | * TLVs can be included at the end of the scan response BSS information. | |
1110 | * | |
1111 | * Data in the buffer is parsed pointers to TLVs that can potentially | |
1112 | * be passed back in the response. | |
1113 | */ | |
1114 | static void | |
1115 | mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter, | |
1116 | struct mwifiex_ie_types_data *tlv, | |
1117 | u32 tlv_buf_size, u32 req_tlv_type, | |
1118 | struct mwifiex_ie_types_data **tlv_data) | |
1119 | { | |
1120 | struct mwifiex_ie_types_data *current_tlv; | |
1121 | u32 tlv_buf_left; | |
1122 | u32 tlv_type; | |
1123 | u32 tlv_len; | |
1124 | ||
1125 | current_tlv = tlv; | |
1126 | tlv_buf_left = tlv_buf_size; | |
1127 | *tlv_data = NULL; | |
1128 | ||
1129 | dev_dbg(adapter->dev, "info: SCAN_RESP: tlv_buf_size = %d\n", | |
1130 | tlv_buf_size); | |
1131 | ||
1132 | while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) { | |
1133 | ||
1134 | tlv_type = le16_to_cpu(current_tlv->header.type); | |
1135 | tlv_len = le16_to_cpu(current_tlv->header.len); | |
1136 | ||
1137 | if (sizeof(tlv->header) + tlv_len > tlv_buf_left) { | |
1138 | dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n"); | |
1139 | break; | |
1140 | } | |
1141 | ||
1142 | if (req_tlv_type == tlv_type) { | |
1143 | switch (tlv_type) { | |
1144 | case TLV_TYPE_TSFTIMESTAMP: | |
1145 | dev_dbg(adapter->dev, "info: SCAN_RESP: TSF " | |
1146 | "timestamp TLV, len = %d\n", tlv_len); | |
1147 | *tlv_data = (struct mwifiex_ie_types_data *) | |
1148 | current_tlv; | |
1149 | break; | |
1150 | case TLV_TYPE_CHANNELBANDLIST: | |
1151 | dev_dbg(adapter->dev, "info: SCAN_RESP: channel" | |
1152 | " band list TLV, len = %d\n", tlv_len); | |
1153 | *tlv_data = (struct mwifiex_ie_types_data *) | |
1154 | current_tlv; | |
1155 | break; | |
1156 | default: | |
1157 | dev_err(adapter->dev, | |
1158 | "SCAN_RESP: unhandled TLV = %d\n", | |
1159 | tlv_type); | |
1160 | /* Give up, this seems corrupted */ | |
1161 | return; | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | if (*tlv_data) | |
1166 | break; | |
1167 | ||
1168 | ||
1169 | tlv_buf_left -= (sizeof(tlv->header) + tlv_len); | |
1170 | current_tlv = | |
1171 | (struct mwifiex_ie_types_data *) (current_tlv->data + | |
1172 | tlv_len); | |
1173 | ||
1174 | } /* while */ | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * This function interprets a BSS scan response returned from the firmware. | |
1179 | * | |
1180 | * The various fixed fields and IEs are parsed and passed back for a BSS | |
1181 | * probe response or beacon from scan command. Information is recorded as | |
1182 | * needed in the scan table for that entry. | |
1183 | * | |
1184 | * The following IE types are recognized and parsed - | |
1185 | * - SSID | |
1186 | * - Supported rates | |
1187 | * - FH parameters set | |
1188 | * - DS parameters set | |
1189 | * - CF parameters set | |
1190 | * - IBSS parameters set | |
1191 | * - ERP information | |
1192 | * - Extended supported rates | |
1193 | * - Vendor specific (221) | |
1194 | * - RSN IE | |
1195 | * - WAPI IE | |
1196 | * - HT capability | |
1197 | * - HT operation | |
1198 | * - BSS Coexistence 20/40 | |
1199 | * - Extended capability | |
1200 | * - Overlapping BSS scan parameters | |
1201 | */ | |
1202 | static int | |
1203 | mwifiex_interpret_bss_desc_with_ie(struct mwifiex_adapter *adapter, | |
1204 | struct mwifiex_bssdescriptor *bss_entry, | |
1205 | u8 **beacon_info, u32 *bytes_left) | |
1206 | { | |
1207 | int ret = 0; | |
1208 | u8 element_id; | |
1209 | struct ieee_types_fh_param_set *fh_param_set; | |
1210 | struct ieee_types_ds_param_set *ds_param_set; | |
1211 | struct ieee_types_cf_param_set *cf_param_set; | |
1212 | struct ieee_types_ibss_param_set *ibss_param_set; | |
1213 | struct mwifiex_802_11_fixed_ies fixed_ie; | |
1214 | u8 *current_ptr; | |
1215 | u8 *rate; | |
1216 | u8 element_len; | |
1217 | u16 total_ie_len; | |
1218 | u8 bytes_to_copy; | |
1219 | u8 rate_size; | |
1220 | u16 beacon_size; | |
1221 | u8 found_data_rate_ie; | |
1222 | u32 bytes_left_for_current_beacon; | |
1223 | struct ieee_types_vendor_specific *vendor_ie; | |
1224 | const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 }; | |
1225 | const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 }; | |
1226 | ||
1227 | found_data_rate_ie = false; | |
1228 | rate_size = 0; | |
1229 | beacon_size = 0; | |
1230 | ||
1231 | if (*bytes_left >= sizeof(beacon_size)) { | |
1232 | /* Extract & convert beacon size from the command buffer */ | |
1233 | memcpy(&beacon_size, *beacon_info, sizeof(beacon_size)); | |
1234 | *bytes_left -= sizeof(beacon_size); | |
1235 | *beacon_info += sizeof(beacon_size); | |
1236 | } | |
1237 | ||
1238 | if (!beacon_size || beacon_size > *bytes_left) { | |
1239 | *beacon_info += *bytes_left; | |
1240 | *bytes_left = 0; | |
1241 | return -1; | |
1242 | } | |
1243 | ||
1244 | /* Initialize the current working beacon pointer for this BSS | |
1245 | iteration */ | |
1246 | current_ptr = *beacon_info; | |
1247 | ||
1248 | /* Advance the return beacon pointer past the current beacon */ | |
1249 | *beacon_info += beacon_size; | |
1250 | *bytes_left -= beacon_size; | |
1251 | ||
1252 | bytes_left_for_current_beacon = beacon_size; | |
1253 | ||
1254 | memcpy(bss_entry->mac_address, current_ptr, ETH_ALEN); | |
1255 | dev_dbg(adapter->dev, "info: InterpretIE: AP MAC Addr: %pM\n", | |
1256 | bss_entry->mac_address); | |
1257 | ||
1258 | current_ptr += ETH_ALEN; | |
1259 | bytes_left_for_current_beacon -= ETH_ALEN; | |
1260 | ||
1261 | if (bytes_left_for_current_beacon < 12) { | |
1262 | dev_err(adapter->dev, "InterpretIE: not enough bytes left\n"); | |
1263 | return -1; | |
1264 | } | |
1265 | ||
1266 | /* | |
1267 | * Next 4 fields are RSSI, time stamp, beacon interval, | |
1268 | * and capability information | |
1269 | */ | |
1270 | ||
1271 | /* RSSI is 1 byte long */ | |
1272 | bss_entry->rssi = (s32) (*current_ptr); | |
1273 | dev_dbg(adapter->dev, "info: InterpretIE: RSSI=%02X\n", *current_ptr); | |
1274 | current_ptr += 1; | |
1275 | bytes_left_for_current_beacon -= 1; | |
1276 | ||
1277 | /* | |
1278 | * The RSSI is not part of the beacon/probe response. After we have | |
1279 | * advanced current_ptr past the RSSI field, save the remaining | |
1280 | * data for use at the application layer | |
1281 | */ | |
1282 | bss_entry->beacon_buf = current_ptr; | |
1283 | bss_entry->beacon_buf_size = bytes_left_for_current_beacon; | |
1284 | ||
1285 | /* Time stamp is 8 bytes long */ | |
1286 | memcpy(fixed_ie.time_stamp, current_ptr, 8); | |
1287 | memcpy(bss_entry->time_stamp, current_ptr, 8); | |
1288 | current_ptr += 8; | |
1289 | bytes_left_for_current_beacon -= 8; | |
1290 | ||
1291 | /* Beacon interval is 2 bytes long */ | |
1292 | memcpy(&fixed_ie.beacon_interval, current_ptr, 2); | |
1293 | bss_entry->beacon_period = le16_to_cpu(fixed_ie.beacon_interval); | |
1294 | current_ptr += 2; | |
1295 | bytes_left_for_current_beacon -= 2; | |
1296 | ||
1297 | /* Capability information is 2 bytes long */ | |
1298 | memcpy(&fixed_ie.capabilities, current_ptr, 2); | |
1299 | dev_dbg(adapter->dev, "info: InterpretIE: fixed_ie.capabilities=0x%X\n", | |
1300 | fixed_ie.capabilities); | |
1301 | bss_entry->cap_info_bitmap = le16_to_cpu(fixed_ie.capabilities); | |
1302 | current_ptr += 2; | |
1303 | bytes_left_for_current_beacon -= 2; | |
1304 | ||
1305 | /* Rest of the current buffer are IE's */ | |
1306 | dev_dbg(adapter->dev, "info: InterpretIE: IELength for this AP = %d\n", | |
1307 | bytes_left_for_current_beacon); | |
1308 | ||
1309 | if (bss_entry->cap_info_bitmap & WLAN_CAPABILITY_PRIVACY) { | |
1310 | dev_dbg(adapter->dev, "info: InterpretIE: AP WEP enabled\n"); | |
1311 | bss_entry->privacy = MWIFIEX_802_11_PRIV_FILTER_8021X_WEP; | |
1312 | } else { | |
1313 | bss_entry->privacy = MWIFIEX_802_11_PRIV_FILTER_ACCEPT_ALL; | |
1314 | } | |
1315 | ||
1316 | if (bss_entry->cap_info_bitmap & WLAN_CAPABILITY_IBSS) | |
eecd8250 | 1317 | bss_entry->bss_mode = NL80211_IFTYPE_ADHOC; |
5e6e3a92 | 1318 | else |
eecd8250 | 1319 | bss_entry->bss_mode = NL80211_IFTYPE_STATION; |
5e6e3a92 BZ |
1320 | |
1321 | ||
1322 | /* Process variable IE */ | |
1323 | while (bytes_left_for_current_beacon >= 2) { | |
1324 | element_id = *current_ptr; | |
1325 | element_len = *(current_ptr + 1); | |
1326 | total_ie_len = element_len + sizeof(struct ieee_types_header); | |
1327 | ||
1328 | if (bytes_left_for_current_beacon < total_ie_len) { | |
1329 | dev_err(adapter->dev, "err: InterpretIE: in processing" | |
1330 | " IE, bytes left < IE length\n"); | |
1331 | bytes_left_for_current_beacon = 0; | |
1332 | ret = -1; | |
1333 | continue; | |
1334 | } | |
1335 | switch (element_id) { | |
1336 | case WLAN_EID_SSID: | |
1337 | bss_entry->ssid.ssid_len = element_len; | |
1338 | memcpy(bss_entry->ssid.ssid, (current_ptr + 2), | |
1339 | element_len); | |
1340 | dev_dbg(adapter->dev, "info: InterpretIE: ssid: %-32s\n", | |
1341 | bss_entry->ssid.ssid); | |
1342 | break; | |
1343 | ||
1344 | case WLAN_EID_SUPP_RATES: | |
1345 | memcpy(bss_entry->data_rates, current_ptr + 2, | |
1346 | element_len); | |
1347 | memcpy(bss_entry->supported_rates, current_ptr + 2, | |
1348 | element_len); | |
1349 | rate_size = element_len; | |
1350 | found_data_rate_ie = true; | |
1351 | break; | |
1352 | ||
1353 | case WLAN_EID_FH_PARAMS: | |
1354 | fh_param_set = | |
1355 | (struct ieee_types_fh_param_set *) current_ptr; | |
1356 | memcpy(&bss_entry->phy_param_set.fh_param_set, | |
1357 | fh_param_set, | |
1358 | sizeof(struct ieee_types_fh_param_set)); | |
1359 | break; | |
1360 | ||
1361 | case WLAN_EID_DS_PARAMS: | |
1362 | ds_param_set = | |
1363 | (struct ieee_types_ds_param_set *) current_ptr; | |
1364 | ||
1365 | bss_entry->channel = ds_param_set->current_chan; | |
1366 | ||
1367 | memcpy(&bss_entry->phy_param_set.ds_param_set, | |
1368 | ds_param_set, | |
1369 | sizeof(struct ieee_types_ds_param_set)); | |
1370 | break; | |
1371 | ||
1372 | case WLAN_EID_CF_PARAMS: | |
1373 | cf_param_set = | |
1374 | (struct ieee_types_cf_param_set *) current_ptr; | |
1375 | memcpy(&bss_entry->ss_param_set.cf_param_set, | |
1376 | cf_param_set, | |
1377 | sizeof(struct ieee_types_cf_param_set)); | |
1378 | break; | |
1379 | ||
1380 | case WLAN_EID_IBSS_PARAMS: | |
1381 | ibss_param_set = | |
1382 | (struct ieee_types_ibss_param_set *) | |
1383 | current_ptr; | |
1384 | memcpy(&bss_entry->ss_param_set.ibss_param_set, | |
1385 | ibss_param_set, | |
1386 | sizeof(struct ieee_types_ibss_param_set)); | |
1387 | break; | |
1388 | ||
1389 | case WLAN_EID_ERP_INFO: | |
1390 | bss_entry->erp_flags = *(current_ptr + 2); | |
1391 | break; | |
1392 | ||
1393 | case WLAN_EID_EXT_SUPP_RATES: | |
1394 | /* | |
1395 | * Only process extended supported rate | |
1396 | * if data rate is already found. | |
1397 | * Data rate IE should come before | |
1398 | * extended supported rate IE | |
1399 | */ | |
1400 | if (found_data_rate_ie) { | |
1401 | if ((element_len + rate_size) > | |
1402 | MWIFIEX_SUPPORTED_RATES) | |
1403 | bytes_to_copy = | |
1404 | (MWIFIEX_SUPPORTED_RATES - | |
1405 | rate_size); | |
1406 | else | |
1407 | bytes_to_copy = element_len; | |
1408 | ||
1409 | rate = (u8 *) bss_entry->data_rates; | |
1410 | rate += rate_size; | |
1411 | memcpy(rate, current_ptr + 2, bytes_to_copy); | |
1412 | ||
1413 | rate = (u8 *) bss_entry->supported_rates; | |
1414 | rate += rate_size; | |
1415 | memcpy(rate, current_ptr + 2, bytes_to_copy); | |
1416 | } | |
1417 | break; | |
1418 | ||
1419 | case WLAN_EID_VENDOR_SPECIFIC: | |
1420 | vendor_ie = (struct ieee_types_vendor_specific *) | |
1421 | current_ptr; | |
1422 | ||
1423 | if (!memcmp | |
1424 | (vendor_ie->vend_hdr.oui, wpa_oui, | |
1425 | sizeof(wpa_oui))) { | |
1426 | bss_entry->bcn_wpa_ie = | |
1427 | (struct ieee_types_vendor_specific *) | |
1428 | current_ptr; | |
1429 | bss_entry->wpa_offset = (u16) (current_ptr - | |
1430 | bss_entry->beacon_buf); | |
1431 | } else if (!memcmp(vendor_ie->vend_hdr.oui, wmm_oui, | |
1432 | sizeof(wmm_oui))) { | |
1433 | if (total_ie_len == | |
1434 | sizeof(struct ieee_types_wmm_parameter) | |
1435 | || total_ie_len == | |
1436 | sizeof(struct ieee_types_wmm_info)) | |
1437 | /* | |
1438 | * Only accept and copy the WMM IE if | |
1439 | * it matches the size expected for the | |
1440 | * WMM Info IE or the WMM Parameter IE. | |
1441 | */ | |
1442 | memcpy((u8 *) &bss_entry->wmm_ie, | |
1443 | current_ptr, total_ie_len); | |
1444 | } | |
1445 | break; | |
1446 | case WLAN_EID_RSN: | |
1447 | bss_entry->bcn_rsn_ie = | |
1448 | (struct ieee_types_generic *) current_ptr; | |
1449 | bss_entry->rsn_offset = (u16) (current_ptr - | |
1450 | bss_entry->beacon_buf); | |
1451 | break; | |
1452 | case WLAN_EID_BSS_AC_ACCESS_DELAY: | |
1453 | bss_entry->bcn_wapi_ie = | |
1454 | (struct ieee_types_generic *) current_ptr; | |
1455 | bss_entry->wapi_offset = (u16) (current_ptr - | |
1456 | bss_entry->beacon_buf); | |
1457 | break; | |
1458 | case WLAN_EID_HT_CAPABILITY: | |
1459 | bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *) | |
1460 | (current_ptr + | |
1461 | sizeof(struct ieee_types_header)); | |
1462 | bss_entry->ht_cap_offset = (u16) (current_ptr + | |
1463 | sizeof(struct ieee_types_header) - | |
1464 | bss_entry->beacon_buf); | |
1465 | break; | |
1466 | case WLAN_EID_HT_INFORMATION: | |
1467 | bss_entry->bcn_ht_info = (struct ieee80211_ht_info *) | |
1468 | (current_ptr + | |
1469 | sizeof(struct ieee_types_header)); | |
1470 | bss_entry->ht_info_offset = (u16) (current_ptr + | |
1471 | sizeof(struct ieee_types_header) - | |
1472 | bss_entry->beacon_buf); | |
1473 | break; | |
1474 | case WLAN_EID_BSS_COEX_2040: | |
1475 | bss_entry->bcn_bss_co_2040 = (u8 *) (current_ptr + | |
1476 | sizeof(struct ieee_types_header)); | |
1477 | bss_entry->bss_co_2040_offset = (u16) (current_ptr + | |
1478 | sizeof(struct ieee_types_header) - | |
1479 | bss_entry->beacon_buf); | |
1480 | break; | |
1481 | case WLAN_EID_EXT_CAPABILITY: | |
1482 | bss_entry->bcn_ext_cap = (u8 *) (current_ptr + | |
1483 | sizeof(struct ieee_types_header)); | |
1484 | bss_entry->ext_cap_offset = (u16) (current_ptr + | |
1485 | sizeof(struct ieee_types_header) - | |
1486 | bss_entry->beacon_buf); | |
1487 | break; | |
1488 | case WLAN_EID_OVERLAP_BSS_SCAN_PARAM: | |
1489 | bss_entry->bcn_obss_scan = | |
1490 | (struct ieee_types_obss_scan_param *) | |
1491 | current_ptr; | |
1492 | bss_entry->overlap_bss_offset = (u16) (current_ptr - | |
1493 | bss_entry->beacon_buf); | |
1494 | break; | |
1495 | default: | |
1496 | break; | |
1497 | } | |
1498 | ||
1499 | current_ptr += element_len + 2; | |
1500 | ||
1501 | /* Need to account for IE ID and IE Len */ | |
1502 | bytes_left_for_current_beacon -= (element_len + 2); | |
1503 | ||
1504 | } /* while (bytes_left_for_current_beacon > 2) */ | |
1505 | return ret; | |
1506 | } | |
1507 | ||
1508 | /* | |
1509 | * This function adjusts the pointers used in beacon buffers to reflect | |
1510 | * shifts. | |
1511 | * | |
1512 | * The memory allocated for beacon buffers is of fixed sizes where all the | |
1513 | * saved beacons must be stored. New beacons are added in the free portion | |
1514 | * of this memory, space permitting; while duplicate beacon buffers are | |
1515 | * placed at the same start location. However, since duplicate beacon | |
1516 | * buffers may not match the size of the old one, all the following buffers | |
1517 | * in the memory must be shifted to either make space, or to fill up freed | |
1518 | * up space. | |
1519 | * | |
1520 | * This function is used to update the beacon buffer pointers that are past | |
1521 | * an existing beacon buffer that is updated with a new one of different | |
1522 | * size. The pointers are shifted by a fixed amount, either forward or | |
1523 | * backward. | |
1524 | * | |
1525 | * the following pointers in every affected beacon buffers are changed, if | |
1526 | * present - | |
1527 | * - WPA IE pointer | |
1528 | * - RSN IE pointer | |
1529 | * - WAPI IE pointer | |
1530 | * - HT capability IE pointer | |
1531 | * - HT information IE pointer | |
1532 | * - BSS coexistence 20/40 IE pointer | |
1533 | * - Extended capability IE pointer | |
1534 | * - Overlapping BSS scan parameter IE pointer | |
1535 | */ | |
1536 | static void | |
1537 | mwifiex_adjust_beacon_buffer_ptrs(struct mwifiex_private *priv, u8 advance, | |
1538 | u8 *bcn_store, u32 rem_bcn_size, | |
1539 | u32 num_of_ent) | |
1540 | { | |
1541 | struct mwifiex_adapter *adapter = priv->adapter; | |
1542 | u32 adj_idx; | |
1543 | for (adj_idx = 0; adj_idx < num_of_ent; adj_idx++) { | |
1544 | if (adapter->scan_table[adj_idx].beacon_buf > bcn_store) { | |
1545 | ||
1546 | if (advance) | |
1547 | adapter->scan_table[adj_idx].beacon_buf += | |
1548 | rem_bcn_size; | |
1549 | else | |
1550 | adapter->scan_table[adj_idx].beacon_buf -= | |
1551 | rem_bcn_size; | |
1552 | ||
1553 | if (adapter->scan_table[adj_idx].bcn_wpa_ie) | |
1554 | adapter->scan_table[adj_idx].bcn_wpa_ie = | |
1555 | (struct ieee_types_vendor_specific *) | |
1556 | (adapter->scan_table[adj_idx].beacon_buf + | |
1557 | adapter->scan_table[adj_idx].wpa_offset); | |
1558 | if (adapter->scan_table[adj_idx].bcn_rsn_ie) | |
1559 | adapter->scan_table[adj_idx].bcn_rsn_ie = | |
1560 | (struct ieee_types_generic *) | |
1561 | (adapter->scan_table[adj_idx].beacon_buf + | |
1562 | adapter->scan_table[adj_idx].rsn_offset); | |
1563 | if (adapter->scan_table[adj_idx].bcn_wapi_ie) | |
1564 | adapter->scan_table[adj_idx].bcn_wapi_ie = | |
1565 | (struct ieee_types_generic *) | |
1566 | (adapter->scan_table[adj_idx].beacon_buf + | |
1567 | adapter->scan_table[adj_idx].wapi_offset); | |
1568 | if (adapter->scan_table[adj_idx].bcn_ht_cap) | |
1569 | adapter->scan_table[adj_idx].bcn_ht_cap = | |
1570 | (struct ieee80211_ht_cap *) | |
1571 | (adapter->scan_table[adj_idx].beacon_buf + | |
1572 | adapter->scan_table[adj_idx].ht_cap_offset); | |
1573 | ||
1574 | if (adapter->scan_table[adj_idx].bcn_ht_info) | |
1575 | adapter->scan_table[adj_idx].bcn_ht_info = | |
1576 | (struct ieee80211_ht_info *) | |
1577 | (adapter->scan_table[adj_idx].beacon_buf + | |
1578 | adapter->scan_table[adj_idx].ht_info_offset); | |
1579 | if (adapter->scan_table[adj_idx].bcn_bss_co_2040) | |
1580 | adapter->scan_table[adj_idx].bcn_bss_co_2040 = | |
1581 | (u8 *) | |
1582 | (adapter->scan_table[adj_idx].beacon_buf + | |
1583 | adapter->scan_table[adj_idx].bss_co_2040_offset); | |
1584 | if (adapter->scan_table[adj_idx].bcn_ext_cap) | |
1585 | adapter->scan_table[adj_idx].bcn_ext_cap = | |
1586 | (u8 *) | |
1587 | (adapter->scan_table[adj_idx].beacon_buf + | |
1588 | adapter->scan_table[adj_idx].ext_cap_offset); | |
1589 | if (adapter->scan_table[adj_idx].bcn_obss_scan) | |
1590 | adapter->scan_table[adj_idx].bcn_obss_scan = | |
1591 | (struct ieee_types_obss_scan_param *) | |
1592 | (adapter->scan_table[adj_idx].beacon_buf + | |
1593 | adapter->scan_table[adj_idx].overlap_bss_offset); | |
1594 | } | |
1595 | } | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * This function updates the pointers used in beacon buffer for given bss | |
1600 | * descriptor to reflect shifts | |
1601 | * | |
1602 | * Following pointers are updated | |
1603 | * - WPA IE pointer | |
1604 | * - RSN IE pointer | |
1605 | * - WAPI IE pointer | |
1606 | * - HT capability IE pointer | |
1607 | * - HT information IE pointer | |
1608 | * - BSS coexistence 20/40 IE pointer | |
1609 | * - Extended capability IE pointer | |
1610 | * - Overlapping BSS scan parameter IE pointer | |
1611 | */ | |
1612 | static void | |
1613 | mwifiex_update_beacon_buffer_ptrs(struct mwifiex_bssdescriptor *beacon) | |
1614 | { | |
1615 | if (beacon->bcn_wpa_ie) | |
1616 | beacon->bcn_wpa_ie = (struct ieee_types_vendor_specific *) | |
1617 | (beacon->beacon_buf + beacon->wpa_offset); | |
1618 | if (beacon->bcn_rsn_ie) | |
1619 | beacon->bcn_rsn_ie = (struct ieee_types_generic *) | |
1620 | (beacon->beacon_buf + beacon->rsn_offset); | |
1621 | if (beacon->bcn_wapi_ie) | |
1622 | beacon->bcn_wapi_ie = (struct ieee_types_generic *) | |
1623 | (beacon->beacon_buf + beacon->wapi_offset); | |
1624 | if (beacon->bcn_ht_cap) | |
1625 | beacon->bcn_ht_cap = (struct ieee80211_ht_cap *) | |
1626 | (beacon->beacon_buf + beacon->ht_cap_offset); | |
1627 | if (beacon->bcn_ht_info) | |
1628 | beacon->bcn_ht_info = (struct ieee80211_ht_info *) | |
1629 | (beacon->beacon_buf + beacon->ht_info_offset); | |
1630 | if (beacon->bcn_bss_co_2040) | |
1631 | beacon->bcn_bss_co_2040 = (u8 *) (beacon->beacon_buf + | |
1632 | beacon->bss_co_2040_offset); | |
1633 | if (beacon->bcn_ext_cap) | |
1634 | beacon->bcn_ext_cap = (u8 *) (beacon->beacon_buf + | |
1635 | beacon->ext_cap_offset); | |
1636 | if (beacon->bcn_obss_scan) | |
1637 | beacon->bcn_obss_scan = (struct ieee_types_obss_scan_param *) | |
1638 | (beacon->beacon_buf + beacon->overlap_bss_offset); | |
1639 | } | |
1640 | ||
1641 | /* | |
1642 | * This function stores a beacon or probe response for a BSS returned | |
1643 | * in the scan. | |
1644 | * | |
1645 | * This stores a new scan response or an update for a previous scan response. | |
1646 | * New entries need to verify that they do not exceed the total amount of | |
1647 | * memory allocated for the table. | |
1648 | * | |
1649 | * Replacement entries need to take into consideration the amount of space | |
1650 | * currently allocated for the beacon/probe response and adjust the entry | |
1651 | * as needed. | |
1652 | * | |
1653 | * A small amount of extra pad (SCAN_BEACON_ENTRY_PAD) is generally reserved | |
1654 | * for an entry in case it is a beacon since a probe response for the | |
1655 | * network will by larger per the standard. This helps to reduce the | |
1656 | * amount of memory copying to fit a new probe response into an entry | |
1657 | * already occupied by a network's previously stored beacon. | |
1658 | */ | |
1659 | static void | |
1660 | mwifiex_ret_802_11_scan_store_beacon(struct mwifiex_private *priv, | |
1661 | u32 beacon_idx, u32 num_of_ent, | |
1662 | struct mwifiex_bssdescriptor *new_beacon) | |
1663 | { | |
1664 | struct mwifiex_adapter *adapter = priv->adapter; | |
1665 | u8 *bcn_store; | |
1666 | u32 new_bcn_size; | |
1667 | u32 old_bcn_size; | |
1668 | u32 bcn_space; | |
1669 | ||
1670 | if (adapter->scan_table[beacon_idx].beacon_buf) { | |
1671 | ||
1672 | new_bcn_size = new_beacon->beacon_buf_size; | |
1673 | old_bcn_size = adapter->scan_table[beacon_idx].beacon_buf_size; | |
1674 | bcn_space = adapter->scan_table[beacon_idx].beacon_buf_size_max; | |
1675 | bcn_store = adapter->scan_table[beacon_idx].beacon_buf; | |
1676 | ||
1677 | /* Set the max to be the same as current entry unless changed | |
1678 | below */ | |
1679 | new_beacon->beacon_buf_size_max = bcn_space; | |
1680 | if (new_bcn_size == old_bcn_size) { | |
1681 | /* | |
1682 | * Beacon is the same size as the previous entry. | |
1683 | * Replace the previous contents with the scan result | |
1684 | */ | |
1685 | memcpy(bcn_store, new_beacon->beacon_buf, | |
1686 | new_beacon->beacon_buf_size); | |
1687 | ||
1688 | } else if (new_bcn_size <= bcn_space) { | |
1689 | /* | |
1690 | * New beacon size will fit in the amount of space | |
1691 | * we have previously allocated for it | |
1692 | */ | |
1693 | ||
1694 | /* Copy the new beacon buffer entry over the old one */ | |
1695 | memcpy(bcn_store, new_beacon->beacon_buf, new_bcn_size); | |
1696 | ||
1697 | /* | |
1698 | * If the old beacon size was less than the maximum | |
1699 | * we had alloted for the entry, and the new entry | |
1700 | * is even smaller, reset the max size to the old | |
1701 | * beacon entry and compress the storage space | |
1702 | * (leaving a new pad space of (old_bcn_size - | |
1703 | * new_bcn_size). | |
1704 | */ | |
1705 | if (old_bcn_size < bcn_space | |
1706 | && new_bcn_size <= old_bcn_size) { | |
1707 | /* | |
1708 | * Old Beacon size is smaller than the alloted | |
1709 | * storage size. Shrink the alloted storage | |
1710 | * space. | |
1711 | */ | |
1712 | dev_dbg(adapter->dev, "info: AppControl:" | |
1713 | " smaller duplicate beacon " | |
1714 | "(%d), old = %d, new = %d, space = %d," | |
1715 | "left = %d\n", | |
1716 | beacon_idx, old_bcn_size, new_bcn_size, | |
1717 | bcn_space, | |
1718 | (int)(sizeof(adapter->bcn_buf) - | |
1719 | (adapter->bcn_buf_end - | |
1720 | adapter->bcn_buf))); | |
1721 | ||
1722 | /* | |
1723 | * memmove (since the memory overlaps) the | |
1724 | * data after the beacon we just stored to the | |
1725 | * end of the current beacon. This cleans up | |
1726 | * any unused space the old larger beacon was | |
1727 | * using in the buffer | |
1728 | */ | |
1729 | memmove(bcn_store + old_bcn_size, | |
1730 | bcn_store + bcn_space, | |
1731 | adapter->bcn_buf_end - (bcn_store + | |
1732 | bcn_space)); | |
1733 | ||
1734 | /* | |
1735 | * Decrement the end pointer by the difference | |
1736 | * between the old larger size and the new | |
1737 | * smaller size since we are using less space | |
1738 | * due to the new beacon being smaller | |
1739 | */ | |
1740 | adapter->bcn_buf_end -= | |
1741 | (bcn_space - old_bcn_size); | |
1742 | ||
1743 | /* Set the maximum storage size to the old | |
1744 | beacon size */ | |
1745 | new_beacon->beacon_buf_size_max = old_bcn_size; | |
1746 | ||
1747 | /* Adjust beacon buffer pointers that are past | |
1748 | the current */ | |
1749 | mwifiex_adjust_beacon_buffer_ptrs(priv, 0, | |
1750 | bcn_store, (bcn_space - old_bcn_size), | |
1751 | num_of_ent); | |
1752 | } | |
1753 | } else if (adapter->bcn_buf_end + (new_bcn_size - bcn_space) | |
1754 | < (adapter->bcn_buf + sizeof(adapter->bcn_buf))) { | |
1755 | /* | |
1756 | * Beacon is larger than space previously allocated | |
1757 | * (bcn_space) and there is enough space left in the | |
1758 | * beaconBuffer to store the additional data | |
1759 | */ | |
1760 | dev_dbg(adapter->dev, "info: AppControl:" | |
1761 | " larger duplicate beacon (%d), " | |
1762 | "old = %d, new = %d, space = %d, left = %d\n", | |
1763 | beacon_idx, old_bcn_size, new_bcn_size, | |
1764 | bcn_space, | |
1765 | (int)(sizeof(adapter->bcn_buf) - | |
1766 | (adapter->bcn_buf_end - | |
1767 | adapter->bcn_buf))); | |
1768 | ||
1769 | /* | |
1770 | * memmove (since the memory overlaps) the data | |
1771 | * after the beacon we just stored to the end of | |
1772 | * the current beacon. This moves the data for | |
1773 | * the beacons after this further in memory to | |
1774 | * make space for the new larger beacon we are | |
1775 | * about to copy in. | |
1776 | */ | |
1777 | memmove(bcn_store + new_bcn_size, | |
1778 | bcn_store + bcn_space, | |
1779 | adapter->bcn_buf_end - (bcn_store + bcn_space)); | |
1780 | ||
1781 | /* Copy the new beacon buffer entry over the old one */ | |
1782 | memcpy(bcn_store, new_beacon->beacon_buf, new_bcn_size); | |
1783 | ||
1784 | /* Move the beacon end pointer by the amount of new | |
1785 | beacon data we are adding */ | |
1786 | adapter->bcn_buf_end += (new_bcn_size - bcn_space); | |
1787 | ||
1788 | /* | |
1789 | * This entry is bigger than the alloted max space | |
1790 | * previously reserved. Increase the max space to | |
1791 | * be equal to the new beacon size | |
1792 | */ | |
1793 | new_beacon->beacon_buf_size_max = new_bcn_size; | |
1794 | ||
1795 | /* Adjust beacon buffer pointers that are past the | |
1796 | current */ | |
1797 | mwifiex_adjust_beacon_buffer_ptrs(priv, 1, bcn_store, | |
1798 | (new_bcn_size - bcn_space), | |
1799 | num_of_ent); | |
1800 | } else { | |
1801 | /* | |
1802 | * Beacon is larger than the previously allocated space, | |
1803 | * but there is not enough free space to store the | |
1804 | * additional data. | |
1805 | */ | |
1806 | dev_err(adapter->dev, "AppControl: larger duplicate " | |
1807 | " beacon (%d), old = %d new = %d, space = %d," | |
1808 | " left = %d\n", beacon_idx, old_bcn_size, | |
1809 | new_bcn_size, bcn_space, | |
1810 | (int)(sizeof(adapter->bcn_buf) - | |
1811 | (adapter->bcn_buf_end - adapter->bcn_buf))); | |
1812 | ||
1813 | /* Storage failure, keep old beacon intact */ | |
1814 | new_beacon->beacon_buf_size = old_bcn_size; | |
1815 | if (new_beacon->bcn_wpa_ie) | |
1816 | new_beacon->wpa_offset = | |
1817 | adapter->scan_table[beacon_idx]. | |
1818 | wpa_offset; | |
1819 | if (new_beacon->bcn_rsn_ie) | |
1820 | new_beacon->rsn_offset = | |
1821 | adapter->scan_table[beacon_idx]. | |
1822 | rsn_offset; | |
1823 | if (new_beacon->bcn_wapi_ie) | |
1824 | new_beacon->wapi_offset = | |
1825 | adapter->scan_table[beacon_idx]. | |
1826 | wapi_offset; | |
1827 | if (new_beacon->bcn_ht_cap) | |
1828 | new_beacon->ht_cap_offset = | |
1829 | adapter->scan_table[beacon_idx]. | |
1830 | ht_cap_offset; | |
1831 | if (new_beacon->bcn_ht_info) | |
1832 | new_beacon->ht_info_offset = | |
1833 | adapter->scan_table[beacon_idx]. | |
1834 | ht_info_offset; | |
1835 | if (new_beacon->bcn_bss_co_2040) | |
1836 | new_beacon->bss_co_2040_offset = | |
1837 | adapter->scan_table[beacon_idx]. | |
1838 | bss_co_2040_offset; | |
1839 | if (new_beacon->bcn_ext_cap) | |
1840 | new_beacon->ext_cap_offset = | |
1841 | adapter->scan_table[beacon_idx]. | |
1842 | ext_cap_offset; | |
1843 | if (new_beacon->bcn_obss_scan) | |
1844 | new_beacon->overlap_bss_offset = | |
1845 | adapter->scan_table[beacon_idx]. | |
1846 | overlap_bss_offset; | |
1847 | } | |
1848 | /* Point the new entry to its permanent storage space */ | |
1849 | new_beacon->beacon_buf = bcn_store; | |
1850 | mwifiex_update_beacon_buffer_ptrs(new_beacon); | |
1851 | } else { | |
1852 | /* | |
1853 | * No existing beacon data exists for this entry, check to see | |
1854 | * if we can fit it in the remaining space | |
1855 | */ | |
1856 | if (adapter->bcn_buf_end + new_beacon->beacon_buf_size + | |
1857 | SCAN_BEACON_ENTRY_PAD < (adapter->bcn_buf + | |
1858 | sizeof(adapter->bcn_buf))) { | |
1859 | ||
1860 | /* | |
1861 | * Copy the beacon buffer data from the local entry to | |
1862 | * the adapter dev struct buffer space used to store | |
1863 | * the raw beacon data for each entry in the scan table | |
1864 | */ | |
1865 | memcpy(adapter->bcn_buf_end, new_beacon->beacon_buf, | |
1866 | new_beacon->beacon_buf_size); | |
1867 | ||
1868 | /* Update the beacon ptr to point to the table save | |
1869 | area */ | |
1870 | new_beacon->beacon_buf = adapter->bcn_buf_end; | |
1871 | new_beacon->beacon_buf_size_max = | |
1872 | (new_beacon->beacon_buf_size + | |
1873 | SCAN_BEACON_ENTRY_PAD); | |
1874 | ||
1875 | mwifiex_update_beacon_buffer_ptrs(new_beacon); | |
1876 | ||
1877 | /* Increment the end pointer by the size reserved */ | |
1878 | adapter->bcn_buf_end += new_beacon->beacon_buf_size_max; | |
1879 | ||
1880 | dev_dbg(adapter->dev, "info: AppControl: beacon[%02d]" | |
1881 | " sz=%03d, used = %04d, left = %04d\n", | |
1882 | beacon_idx, | |
1883 | new_beacon->beacon_buf_size, | |
1884 | (int)(adapter->bcn_buf_end - adapter->bcn_buf), | |
1885 | (int)(sizeof(adapter->bcn_buf) - | |
1886 | (adapter->bcn_buf_end - | |
1887 | adapter->bcn_buf))); | |
1888 | } else { | |
1889 | /* No space for new beacon */ | |
1890 | dev_dbg(adapter->dev, "info: AppControl: no space for" | |
1891 | " beacon (%d): %pM sz=%03d, left=%03d\n", | |
1892 | beacon_idx, new_beacon->mac_address, | |
1893 | new_beacon->beacon_buf_size, | |
1894 | (int)(sizeof(adapter->bcn_buf) - | |
1895 | (adapter->bcn_buf_end - | |
1896 | adapter->bcn_buf))); | |
1897 | ||
1898 | /* Storage failure; clear storage records for this | |
1899 | bcn */ | |
1900 | new_beacon->beacon_buf = NULL; | |
1901 | new_beacon->beacon_buf_size = 0; | |
1902 | new_beacon->beacon_buf_size_max = 0; | |
1903 | new_beacon->bcn_wpa_ie = NULL; | |
1904 | new_beacon->wpa_offset = 0; | |
1905 | new_beacon->bcn_rsn_ie = NULL; | |
1906 | new_beacon->rsn_offset = 0; | |
1907 | new_beacon->bcn_wapi_ie = NULL; | |
1908 | new_beacon->wapi_offset = 0; | |
1909 | new_beacon->bcn_ht_cap = NULL; | |
1910 | new_beacon->ht_cap_offset = 0; | |
1911 | new_beacon->bcn_ht_info = NULL; | |
1912 | new_beacon->ht_info_offset = 0; | |
1913 | new_beacon->bcn_bss_co_2040 = NULL; | |
1914 | new_beacon->bss_co_2040_offset = 0; | |
1915 | new_beacon->bcn_ext_cap = NULL; | |
1916 | new_beacon->ext_cap_offset = 0; | |
1917 | new_beacon->bcn_obss_scan = NULL; | |
1918 | new_beacon->overlap_bss_offset = 0; | |
1919 | } | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | /* | |
1924 | * This function restores a beacon buffer of the current BSS descriptor. | |
1925 | */ | |
1926 | static void mwifiex_restore_curr_bcn(struct mwifiex_private *priv) | |
1927 | { | |
1928 | struct mwifiex_adapter *adapter = priv->adapter; | |
1929 | struct mwifiex_bssdescriptor *curr_bss = | |
1930 | &priv->curr_bss_params.bss_descriptor; | |
1931 | unsigned long flags; | |
1932 | ||
1933 | if (priv->curr_bcn_buf && | |
1934 | ((adapter->bcn_buf_end + priv->curr_bcn_size) < | |
1935 | (adapter->bcn_buf + sizeof(adapter->bcn_buf)))) { | |
1936 | spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags); | |
1937 | ||
1938 | /* restore the current beacon buffer */ | |
1939 | memcpy(adapter->bcn_buf_end, priv->curr_bcn_buf, | |
1940 | priv->curr_bcn_size); | |
1941 | curr_bss->beacon_buf = adapter->bcn_buf_end; | |
1942 | curr_bss->beacon_buf_size = priv->curr_bcn_size; | |
1943 | adapter->bcn_buf_end += priv->curr_bcn_size; | |
1944 | ||
1945 | /* adjust the pointers in the current BSS descriptor */ | |
1946 | if (curr_bss->bcn_wpa_ie) | |
1947 | curr_bss->bcn_wpa_ie = | |
1948 | (struct ieee_types_vendor_specific *) | |
1949 | (curr_bss->beacon_buf + | |
1950 | curr_bss->wpa_offset); | |
1951 | ||
1952 | if (curr_bss->bcn_rsn_ie) | |
1953 | curr_bss->bcn_rsn_ie = (struct ieee_types_generic *) | |
1954 | (curr_bss->beacon_buf + | |
1955 | curr_bss->rsn_offset); | |
1956 | ||
1957 | if (curr_bss->bcn_ht_cap) | |
1958 | curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *) | |
1959 | (curr_bss->beacon_buf + | |
1960 | curr_bss->ht_cap_offset); | |
1961 | ||
1962 | if (curr_bss->bcn_ht_info) | |
1963 | curr_bss->bcn_ht_info = (struct ieee80211_ht_info *) | |
1964 | (curr_bss->beacon_buf + | |
1965 | curr_bss->ht_info_offset); | |
1966 | ||
1967 | if (curr_bss->bcn_bss_co_2040) | |
1968 | curr_bss->bcn_bss_co_2040 = | |
1969 | (u8 *) (curr_bss->beacon_buf + | |
1970 | curr_bss->bss_co_2040_offset); | |
1971 | ||
1972 | if (curr_bss->bcn_ext_cap) | |
1973 | curr_bss->bcn_ext_cap = (u8 *) (curr_bss->beacon_buf + | |
1974 | curr_bss->ext_cap_offset); | |
1975 | ||
1976 | if (curr_bss->bcn_obss_scan) | |
1977 | curr_bss->bcn_obss_scan = | |
1978 | (struct ieee_types_obss_scan_param *) | |
1979 | (curr_bss->beacon_buf + | |
1980 | curr_bss->overlap_bss_offset); | |
1981 | ||
1982 | spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags); | |
1983 | ||
1984 | dev_dbg(adapter->dev, "info: current beacon restored %d\n", | |
1985 | priv->curr_bcn_size); | |
1986 | } else { | |
1987 | dev_warn(adapter->dev, | |
1988 | "curr_bcn_buf not saved or bcn_buf has no space\n"); | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | /* | |
1993 | * This function post processes the scan table after a new scan command has | |
1994 | * completed. | |
1995 | * | |
1996 | * It inspects each entry of the scan table and tries to find an entry that | |
1997 | * matches with our current associated/joined network from the scan. If | |
1998 | * one is found, the stored copy of the BSS descriptor of our current network | |
1999 | * is updated. | |
2000 | * | |
2001 | * It also debug dumps the current scan table contents after processing is over. | |
2002 | */ | |
2003 | static void | |
2004 | mwifiex_process_scan_results(struct mwifiex_private *priv) | |
2005 | { | |
2006 | struct mwifiex_adapter *adapter = priv->adapter; | |
2007 | s32 j; | |
2008 | u32 i; | |
2009 | unsigned long flags; | |
2010 | ||
2011 | if (priv->media_connected) { | |
2012 | ||
2013 | j = mwifiex_find_ssid_in_list(priv, &priv->curr_bss_params. | |
2014 | bss_descriptor.ssid, | |
2015 | priv->curr_bss_params. | |
2016 | bss_descriptor.mac_address, | |
2017 | priv->bss_mode); | |
2018 | ||
2019 | if (j >= 0) { | |
2020 | spin_lock_irqsave(&priv->curr_bcn_buf_lock, flags); | |
2021 | priv->curr_bss_params.bss_descriptor.bcn_wpa_ie = NULL; | |
2022 | priv->curr_bss_params.bss_descriptor.wpa_offset = 0; | |
2023 | priv->curr_bss_params.bss_descriptor.bcn_rsn_ie = NULL; | |
2024 | priv->curr_bss_params.bss_descriptor.rsn_offset = 0; | |
2025 | priv->curr_bss_params.bss_descriptor.bcn_wapi_ie = NULL; | |
2026 | priv->curr_bss_params.bss_descriptor.wapi_offset = 0; | |
2027 | priv->curr_bss_params.bss_descriptor.bcn_ht_cap = NULL; | |
2028 | priv->curr_bss_params.bss_descriptor.ht_cap_offset = | |
2029 | 0; | |
2030 | priv->curr_bss_params.bss_descriptor.bcn_ht_info = NULL; | |
2031 | priv->curr_bss_params.bss_descriptor.ht_info_offset = | |
2032 | 0; | |
2033 | priv->curr_bss_params.bss_descriptor.bcn_bss_co_2040 = | |
2034 | NULL; | |
2035 | priv->curr_bss_params.bss_descriptor. | |
2036 | bss_co_2040_offset = 0; | |
2037 | priv->curr_bss_params.bss_descriptor.bcn_ext_cap = NULL; | |
2038 | priv->curr_bss_params.bss_descriptor.ext_cap_offset = 0; | |
2039 | priv->curr_bss_params.bss_descriptor. | |
2040 | bcn_obss_scan = NULL; | |
2041 | priv->curr_bss_params.bss_descriptor. | |
2042 | overlap_bss_offset = 0; | |
2043 | priv->curr_bss_params.bss_descriptor.beacon_buf = NULL; | |
2044 | priv->curr_bss_params.bss_descriptor.beacon_buf_size = | |
2045 | 0; | |
2046 | priv->curr_bss_params.bss_descriptor. | |
2047 | beacon_buf_size_max = 0; | |
2048 | ||
2049 | dev_dbg(adapter->dev, "info: Found current ssid/bssid" | |
2050 | " in list @ index #%d\n", j); | |
2051 | /* Make a copy of current BSSID descriptor */ | |
2052 | memcpy(&priv->curr_bss_params.bss_descriptor, | |
2053 | &adapter->scan_table[j], | |
2054 | sizeof(priv->curr_bss_params.bss_descriptor)); | |
2055 | ||
2056 | mwifiex_save_curr_bcn(priv); | |
2057 | spin_unlock_irqrestore(&priv->curr_bcn_buf_lock, flags); | |
2058 | ||
2059 | } else { | |
2060 | mwifiex_restore_curr_bcn(priv); | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | for (i = 0; i < adapter->num_in_scan_table; i++) | |
2065 | dev_dbg(adapter->dev, "info: scan:(%02d) %pM " | |
2066 | "RSSI[%03d], SSID[%s]\n", | |
2067 | i, adapter->scan_table[i].mac_address, | |
2068 | (s32) adapter->scan_table[i].rssi, | |
2069 | adapter->scan_table[i].ssid.ssid); | |
2070 | } | |
2071 | ||
2072 | /* | |
2073 | * This function converts radio type scan parameter to a band configuration | |
2074 | * to be used in join command. | |
2075 | */ | |
2076 | static u8 | |
2077 | mwifiex_radio_type_to_band(u8 radio_type) | |
2078 | { | |
2079 | u8 ret_band; | |
2080 | ||
2081 | switch (radio_type) { | |
2082 | case HostCmd_SCAN_RADIO_TYPE_A: | |
2083 | ret_band = BAND_A; | |
2084 | break; | |
2085 | case HostCmd_SCAN_RADIO_TYPE_BG: | |
2086 | default: | |
2087 | ret_band = BAND_G; | |
2088 | break; | |
2089 | } | |
2090 | ||
2091 | return ret_band; | |
2092 | } | |
2093 | ||
2094 | /* | |
2095 | * This function deletes a specific indexed entry from the scan table. | |
2096 | * | |
2097 | * This also compacts the remaining entries and adjusts any buffering | |
2098 | * of beacon/probe response data if needed. | |
2099 | */ | |
2100 | static void | |
2101 | mwifiex_scan_delete_table_entry(struct mwifiex_private *priv, s32 table_idx) | |
2102 | { | |
2103 | struct mwifiex_adapter *adapter = priv->adapter; | |
2104 | u32 del_idx; | |
2105 | u32 beacon_buf_adj; | |
2106 | u8 *beacon_buf; | |
2107 | ||
2108 | /* | |
2109 | * Shift the saved beacon buffer data for the scan table back over the | |
2110 | * entry being removed. Update the end of buffer pointer. Save the | |
2111 | * deleted buffer allocation size for pointer adjustments for entries | |
2112 | * compacted after the deleted index. | |
2113 | */ | |
2114 | beacon_buf_adj = adapter->scan_table[table_idx].beacon_buf_size_max; | |
2115 | ||
2116 | dev_dbg(adapter->dev, "info: Scan: Delete Entry %d, beacon buffer " | |
2117 | "removal = %d bytes\n", table_idx, beacon_buf_adj); | |
2118 | ||
2119 | /* Check if the table entry had storage allocated for its beacon */ | |
2120 | if (beacon_buf_adj) { | |
2121 | beacon_buf = adapter->scan_table[table_idx].beacon_buf; | |
2122 | ||
2123 | /* | |
2124 | * Remove the entry's buffer space, decrement the table end | |
2125 | * pointer by the amount we are removing | |
2126 | */ | |
2127 | adapter->bcn_buf_end -= beacon_buf_adj; | |
2128 | ||
2129 | dev_dbg(adapter->dev, "info: scan: delete entry %d," | |
2130 | " compact data: %p <- %p (sz = %d)\n", | |
2131 | table_idx, beacon_buf, | |
2132 | beacon_buf + beacon_buf_adj, | |
2133 | (int)(adapter->bcn_buf_end - beacon_buf)); | |
2134 | ||
2135 | /* | |
2136 | * Compact data storage. Copy all data after the deleted | |
2137 | * entry's end address (beacon_buf + beacon_buf_adj) back | |
2138 | * to the original start address (beacon_buf). | |
2139 | * | |
2140 | * Scan table entries affected by the move will have their | |
2141 | * entry pointer adjusted below. | |
2142 | * | |
2143 | * Use memmove since the dest/src memory regions overlap. | |
2144 | */ | |
2145 | memmove(beacon_buf, beacon_buf + beacon_buf_adj, | |
2146 | adapter->bcn_buf_end - beacon_buf); | |
2147 | } | |
2148 | ||
2149 | dev_dbg(adapter->dev, | |
2150 | "info: Scan: Delete Entry %d, num_in_scan_table = %d\n", | |
2151 | table_idx, adapter->num_in_scan_table); | |
2152 | ||
2153 | /* Shift all of the entries after the table_idx back by one, compacting | |
2154 | the table and removing the requested entry */ | |
2155 | for (del_idx = table_idx; (del_idx + 1) < adapter->num_in_scan_table; | |
2156 | del_idx++) { | |
2157 | /* Copy the next entry over this one */ | |
2158 | memcpy(adapter->scan_table + del_idx, | |
2159 | adapter->scan_table + del_idx + 1, | |
2160 | sizeof(struct mwifiex_bssdescriptor)); | |
2161 | ||
2162 | /* | |
2163 | * Adjust this entry's pointer to its beacon buffer based on | |
2164 | * the removed/compacted entry from the deleted index. Don't | |
2165 | * decrement if the buffer pointer is NULL (no data stored for | |
2166 | * this entry). | |
2167 | */ | |
2168 | if (adapter->scan_table[del_idx].beacon_buf) { | |
2169 | adapter->scan_table[del_idx].beacon_buf -= | |
2170 | beacon_buf_adj; | |
2171 | if (adapter->scan_table[del_idx].bcn_wpa_ie) | |
2172 | adapter->scan_table[del_idx].bcn_wpa_ie = | |
2173 | (struct ieee_types_vendor_specific *) | |
2174 | (adapter->scan_table[del_idx]. | |
2175 | beacon_buf + | |
2176 | adapter->scan_table[del_idx]. | |
2177 | wpa_offset); | |
2178 | if (adapter->scan_table[del_idx].bcn_rsn_ie) | |
2179 | adapter->scan_table[del_idx].bcn_rsn_ie = | |
2180 | (struct ieee_types_generic *) | |
2181 | (adapter->scan_table[del_idx]. | |
2182 | beacon_buf + | |
2183 | adapter->scan_table[del_idx]. | |
2184 | rsn_offset); | |
2185 | if (adapter->scan_table[del_idx].bcn_wapi_ie) | |
2186 | adapter->scan_table[del_idx].bcn_wapi_ie = | |
2187 | (struct ieee_types_generic *) | |
2188 | (adapter->scan_table[del_idx].beacon_buf | |
2189 | + adapter->scan_table[del_idx]. | |
2190 | wapi_offset); | |
2191 | if (adapter->scan_table[del_idx].bcn_ht_cap) | |
2192 | adapter->scan_table[del_idx].bcn_ht_cap = | |
2193 | (struct ieee80211_ht_cap *) | |
2194 | (adapter->scan_table[del_idx].beacon_buf | |
2195 | + adapter->scan_table[del_idx]. | |
2196 | ht_cap_offset); | |
2197 | ||
2198 | if (adapter->scan_table[del_idx].bcn_ht_info) | |
2199 | adapter->scan_table[del_idx].bcn_ht_info = | |
2200 | (struct ieee80211_ht_info *) | |
2201 | (adapter->scan_table[del_idx].beacon_buf | |
2202 | + adapter->scan_table[del_idx]. | |
2203 | ht_info_offset); | |
2204 | if (adapter->scan_table[del_idx].bcn_bss_co_2040) | |
2205 | adapter->scan_table[del_idx].bcn_bss_co_2040 = | |
2206 | (u8 *) | |
2207 | (adapter->scan_table[del_idx].beacon_buf | |
2208 | + adapter->scan_table[del_idx]. | |
2209 | bss_co_2040_offset); | |
2210 | if (adapter->scan_table[del_idx].bcn_ext_cap) | |
2211 | adapter->scan_table[del_idx].bcn_ext_cap = | |
2212 | (u8 *) | |
2213 | (adapter->scan_table[del_idx].beacon_buf | |
2214 | + adapter->scan_table[del_idx]. | |
2215 | ext_cap_offset); | |
2216 | if (adapter->scan_table[del_idx].bcn_obss_scan) | |
2217 | adapter->scan_table[del_idx]. | |
2218 | bcn_obss_scan = | |
2219 | (struct ieee_types_obss_scan_param *) | |
2220 | (adapter->scan_table[del_idx].beacon_buf | |
2221 | + adapter->scan_table[del_idx]. | |
2222 | overlap_bss_offset); | |
2223 | } | |
2224 | } | |
2225 | ||
2226 | /* The last entry is invalid now that it has been deleted or moved | |
2227 | back */ | |
2228 | memset(adapter->scan_table + adapter->num_in_scan_table - 1, | |
2229 | 0x00, sizeof(struct mwifiex_bssdescriptor)); | |
2230 | ||
2231 | adapter->num_in_scan_table--; | |
2232 | } | |
2233 | ||
2234 | /* | |
2235 | * This function deletes all occurrences of a given SSID from the scan table. | |
2236 | * | |
2237 | * This iterates through the scan table and deletes all entries that match | |
2238 | * the given SSID. It also compacts the remaining scan table entries. | |
2239 | */ | |
2240 | static int | |
2241 | mwifiex_scan_delete_ssid_table_entry(struct mwifiex_private *priv, | |
2242 | struct mwifiex_802_11_ssid *del_ssid) | |
2243 | { | |
2244 | int ret = -1; | |
2245 | s32 table_idx; | |
2246 | ||
2247 | dev_dbg(priv->adapter->dev, "info: scan: delete ssid entry: %-32s\n", | |
2248 | del_ssid->ssid); | |
2249 | ||
2250 | /* If the requested SSID is found in the table, delete it. Then keep | |
2251 | searching the table for multiple entires for the SSID until no | |
2252 | more are found */ | |
2253 | while ((table_idx = mwifiex_find_ssid_in_list(priv, del_ssid, NULL, | |
eecd8250 | 2254 | NL80211_IFTYPE_UNSPECIFIED)) >= 0) { |
5e6e3a92 BZ |
2255 | dev_dbg(priv->adapter->dev, |
2256 | "info: Scan: Delete SSID Entry: Found Idx = %d\n", | |
2257 | table_idx); | |
2258 | ret = 0; | |
2259 | mwifiex_scan_delete_table_entry(priv, table_idx); | |
2260 | } | |
2261 | ||
2262 | return ret; | |
2263 | } | |
2264 | ||
2265 | /* | |
2266 | * This is an internal function used to start a scan based on an input | |
2267 | * configuration. | |
2268 | * | |
2269 | * This uses the input user scan configuration information when provided in | |
2270 | * order to send the appropriate scan commands to firmware to populate or | |
2271 | * update the internal driver scan table. | |
2272 | */ | |
2273 | int mwifiex_scan_networks(struct mwifiex_private *priv, | |
2274 | void *wait_buf, u16 action, | |
2275 | const struct mwifiex_user_scan_cfg *user_scan_in, | |
2276 | struct mwifiex_scan_resp *scan_resp) | |
2277 | { | |
2278 | int ret = 0; | |
2279 | struct mwifiex_adapter *adapter = priv->adapter; | |
2280 | struct cmd_ctrl_node *cmd_node = NULL; | |
2281 | union mwifiex_scan_cmd_config_tlv *scan_cfg_out = NULL; | |
2282 | struct mwifiex_ie_types_chan_list_param_set *chan_list_out; | |
2283 | u32 buf_size; | |
2284 | struct mwifiex_chan_scan_param_set *scan_chan_list; | |
2285 | u8 keep_previous_scan; | |
2286 | u8 filtered_scan; | |
2287 | u8 scan_current_chan_only; | |
2288 | u8 max_chan_per_scan; | |
2289 | unsigned long flags; | |
2290 | ||
2291 | if (action == HostCmd_ACT_GEN_GET) { | |
2292 | if (scan_resp) { | |
2293 | scan_resp->scan_table = (u8 *) adapter->scan_table; | |
2294 | scan_resp->num_in_scan_table = | |
2295 | adapter->num_in_scan_table; | |
2296 | } else { | |
2297 | ret = -1; | |
2298 | } | |
2299 | return ret; | |
2300 | } | |
2301 | ||
2302 | if (adapter->scan_processing && action == HostCmd_ACT_GEN_SET) { | |
2303 | dev_dbg(adapter->dev, "cmd: Scan already in process...\n"); | |
2304 | return ret; | |
2305 | } | |
2306 | ||
2307 | spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); | |
2308 | adapter->scan_processing = true; | |
2309 | spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); | |
2310 | ||
2311 | if (priv->scan_block && action == HostCmd_ACT_GEN_SET) { | |
2312 | dev_dbg(adapter->dev, | |
2313 | "cmd: Scan is blocked during association...\n"); | |
2314 | return ret; | |
2315 | } | |
2316 | ||
2317 | scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv), | |
2318 | GFP_KERNEL); | |
2319 | if (!scan_cfg_out) { | |
2320 | dev_err(adapter->dev, "failed to alloc scan_cfg_out\n"); | |
2321 | return -1; | |
2322 | } | |
2323 | ||
2324 | buf_size = sizeof(struct mwifiex_chan_scan_param_set) * | |
2325 | MWIFIEX_USER_SCAN_CHAN_MAX; | |
2326 | scan_chan_list = kzalloc(buf_size, GFP_KERNEL); | |
2327 | if (!scan_chan_list) { | |
2328 | dev_err(adapter->dev, "failed to alloc scan_chan_list\n"); | |
2329 | kfree(scan_cfg_out); | |
2330 | return -1; | |
2331 | } | |
2332 | ||
2333 | keep_previous_scan = false; | |
2334 | ||
2335 | mwifiex_scan_setup_scan_config(priv, user_scan_in, | |
2336 | &scan_cfg_out->config, &chan_list_out, | |
2337 | scan_chan_list, &max_chan_per_scan, | |
2338 | &filtered_scan, &scan_current_chan_only); | |
2339 | ||
2340 | if (user_scan_in) | |
2341 | keep_previous_scan = user_scan_in->keep_previous_scan; | |
2342 | ||
2343 | ||
2344 | if (!keep_previous_scan) { | |
2345 | memset(adapter->scan_table, 0x00, | |
2346 | sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP); | |
2347 | adapter->num_in_scan_table = 0; | |
2348 | adapter->bcn_buf_end = adapter->bcn_buf; | |
2349 | } | |
2350 | ||
2351 | ret = mwifiex_scan_channel_list(priv, wait_buf, max_chan_per_scan, | |
2352 | filtered_scan, &scan_cfg_out->config, | |
2353 | chan_list_out, scan_chan_list); | |
2354 | ||
2355 | /* Get scan command from scan_pending_q and put to cmd_pending_q */ | |
2356 | if (!ret) { | |
2357 | spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); | |
2358 | if (!list_empty(&adapter->scan_pending_q)) { | |
2359 | cmd_node = list_first_entry(&adapter->scan_pending_q, | |
2360 | struct cmd_ctrl_node, list); | |
2361 | list_del(&cmd_node->list); | |
2362 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, | |
2363 | flags); | |
2364 | mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, | |
2365 | true); | |
2366 | } else { | |
2367 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, | |
2368 | flags); | |
2369 | } | |
2370 | ret = -EINPROGRESS; | |
2371 | } else { | |
2372 | spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); | |
2373 | adapter->scan_processing = true; | |
2374 | spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); | |
2375 | } | |
2376 | ||
2377 | kfree(scan_cfg_out); | |
2378 | kfree(scan_chan_list); | |
2379 | return ret; | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | * This function prepares a scan command to be sent to the firmware. | |
2384 | * | |
2385 | * This uses the scan command configuration sent to the command processing | |
2386 | * module in command preparation stage to configure a scan command structure | |
2387 | * to send to firmware. | |
2388 | * | |
2389 | * The fixed fields specifying the BSS type and BSSID filters as well as a | |
2390 | * variable number/length of TLVs are sent in the command to firmware. | |
2391 | * | |
2392 | * Preparation also includes - | |
2393 | * - Setting command ID, and proper size | |
2394 | * - Ensuring correct endian-ness | |
2395 | */ | |
2396 | int mwifiex_cmd_802_11_scan(struct mwifiex_private *priv, | |
2397 | struct host_cmd_ds_command *cmd, void *data_buf) | |
2398 | { | |
2399 | struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan; | |
2400 | struct mwifiex_scan_cmd_config *scan_cfg; | |
2401 | ||
2402 | scan_cfg = (struct mwifiex_scan_cmd_config *) data_buf; | |
2403 | ||
2404 | /* Set fixed field variables in scan command */ | |
2405 | scan_cmd->bss_mode = scan_cfg->bss_mode; | |
2406 | memcpy(scan_cmd->bssid, scan_cfg->specific_bssid, | |
2407 | sizeof(scan_cmd->bssid)); | |
2408 | memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len); | |
2409 | ||
2410 | cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN); | |
2411 | ||
2412 | /* Size is equal to the sizeof(fixed portions) + the TLV len + header */ | |
2413 | cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode) | |
2414 | + sizeof(scan_cmd->bssid) | |
2415 | + scan_cfg->tlv_buf_len + S_DS_GEN)); | |
2416 | ||
2417 | return 0; | |
2418 | } | |
2419 | ||
2420 | /* | |
2421 | * This function handles the command response of scan. | |
2422 | * | |
2423 | * The response buffer for the scan command has the following | |
2424 | * memory layout: | |
2425 | * | |
2426 | * .-------------------------------------------------------------. | |
2427 | * | Header (4 * sizeof(t_u16)): Standard command response hdr | | |
2428 | * .-------------------------------------------------------------. | |
2429 | * | BufSize (t_u16) : sizeof the BSS Description data | | |
2430 | * .-------------------------------------------------------------. | |
2431 | * | NumOfSet (t_u8) : Number of BSS Descs returned | | |
2432 | * .-------------------------------------------------------------. | |
2433 | * | BSSDescription data (variable, size given in BufSize) | | |
2434 | * .-------------------------------------------------------------. | |
2435 | * | TLV data (variable, size calculated using Header->Size, | | |
2436 | * | BufSize and sizeof the fixed fields above) | | |
2437 | * .-------------------------------------------------------------. | |
2438 | */ | |
2439 | int mwifiex_ret_802_11_scan(struct mwifiex_private *priv, | |
2440 | struct host_cmd_ds_command *resp, void *wq_buf) | |
2441 | { | |
2442 | int ret = 0; | |
2443 | struct mwifiex_adapter *adapter = priv->adapter; | |
2444 | struct mwifiex_wait_queue *wait_queue = NULL; | |
2445 | struct cmd_ctrl_node *cmd_node = NULL; | |
2446 | struct host_cmd_ds_802_11_scan_rsp *scan_rsp = NULL; | |
2447 | struct mwifiex_bssdescriptor *bss_new_entry = NULL; | |
2448 | struct mwifiex_ie_types_data *tlv_data; | |
2449 | struct mwifiex_ie_types_tsf_timestamp *tsf_tlv; | |
2450 | u8 *bss_info; | |
2451 | u32 scan_resp_size; | |
2452 | u32 bytes_left; | |
2453 | u32 num_in_table; | |
2454 | u32 bss_idx; | |
2455 | u32 idx; | |
2456 | u32 tlv_buf_size; | |
2457 | long long tsf_val; | |
2458 | struct mwifiex_chan_freq_power *cfp; | |
2459 | struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv; | |
2460 | struct chan_band_param_set *chan_band; | |
2461 | u8 band; | |
2462 | u8 is_bgscan_resp; | |
2463 | unsigned long flags; | |
2464 | ||
2465 | is_bgscan_resp = (le16_to_cpu(resp->command) | |
2466 | == HostCmd_CMD_802_11_BG_SCAN_QUERY); | |
2467 | if (is_bgscan_resp) | |
2468 | scan_rsp = &resp->params.bg_scan_query_resp.scan_resp; | |
2469 | else | |
2470 | scan_rsp = &resp->params.scan_resp; | |
2471 | ||
2472 | ||
2473 | if (scan_rsp->number_of_sets > IW_MAX_AP) { | |
2474 | dev_err(adapter->dev, "SCAN_RESP: too many AP returned (%d)\n", | |
2475 | scan_rsp->number_of_sets); | |
2476 | ret = -1; | |
2477 | goto done; | |
2478 | } | |
2479 | ||
2480 | bytes_left = le16_to_cpu(scan_rsp->bss_descript_size); | |
2481 | dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n", | |
2482 | bytes_left); | |
2483 | ||
2484 | scan_resp_size = le16_to_cpu(resp->size); | |
2485 | ||
2486 | dev_dbg(adapter->dev, | |
2487 | "info: SCAN_RESP: returned %d APs before parsing\n", | |
2488 | scan_rsp->number_of_sets); | |
2489 | ||
2490 | num_in_table = adapter->num_in_scan_table; | |
2491 | bss_info = scan_rsp->bss_desc_and_tlv_buffer; | |
2492 | ||
2493 | /* | |
2494 | * The size of the TLV buffer is equal to the entire command response | |
2495 | * size (scan_resp_size) minus the fixed fields (sizeof()'s), the | |
2496 | * BSS Descriptions (bss_descript_size as bytesLef) and the command | |
2497 | * response header (S_DS_GEN) | |
2498 | */ | |
2499 | tlv_buf_size = scan_resp_size - (bytes_left | |
2500 | + sizeof(scan_rsp->bss_descript_size) | |
2501 | + sizeof(scan_rsp->number_of_sets) | |
2502 | + S_DS_GEN); | |
2503 | ||
2504 | tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp-> | |
2505 | bss_desc_and_tlv_buffer + | |
2506 | bytes_left); | |
2507 | ||
2508 | /* Search the TLV buffer space in the scan response for any valid | |
2509 | TLVs */ | |
2510 | mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, | |
2511 | TLV_TYPE_TSFTIMESTAMP, | |
2512 | (struct mwifiex_ie_types_data **) | |
2513 | &tsf_tlv); | |
2514 | ||
2515 | /* Search the TLV buffer space in the scan response for any valid | |
2516 | TLVs */ | |
2517 | mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size, | |
2518 | TLV_TYPE_CHANNELBANDLIST, | |
2519 | (struct mwifiex_ie_types_data **) | |
2520 | &chan_band_tlv); | |
2521 | ||
2522 | /* | |
2523 | * Process each scan response returned (scan_rsp->number_of_sets). | |
2524 | * Save the information in the bss_new_entry and then insert into the | |
2525 | * driver scan table either as an update to an existing entry | |
2526 | * or as an addition at the end of the table | |
2527 | */ | |
2528 | bss_new_entry = kzalloc(sizeof(struct mwifiex_bssdescriptor), | |
2529 | GFP_KERNEL); | |
2530 | if (!bss_new_entry) { | |
2531 | dev_err(adapter->dev, " failed to alloc bss_new_entry\n"); | |
2532 | return -1; | |
2533 | } | |
2534 | ||
2535 | for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) { | |
2536 | /* Zero out the bss_new_entry we are about to store info in */ | |
2537 | memset(bss_new_entry, 0x00, | |
2538 | sizeof(struct mwifiex_bssdescriptor)); | |
2539 | ||
2540 | if (mwifiex_interpret_bss_desc_with_ie(adapter, bss_new_entry, | |
2541 | &bss_info, | |
2542 | &bytes_left)) { | |
2543 | /* Error parsing/interpreting scan response, skipped */ | |
2544 | dev_err(adapter->dev, "SCAN_RESP: " | |
2545 | "mwifiex_interpret_bss_desc_with_ie " | |
2546 | "returned ERROR\n"); | |
2547 | continue; | |
2548 | } | |
2549 | ||
2550 | /* Process the data fields and IEs returned for this BSS */ | |
2551 | dev_dbg(adapter->dev, "info: SCAN_RESP: BSSID = %pM\n", | |
2552 | bss_new_entry->mac_address); | |
2553 | ||
2554 | /* Search the scan table for the same bssid */ | |
2555 | for (bss_idx = 0; bss_idx < num_in_table; bss_idx++) { | |
2556 | if (memcmp(bss_new_entry->mac_address, | |
2557 | adapter->scan_table[bss_idx].mac_address, | |
2558 | sizeof(bss_new_entry->mac_address))) { | |
2559 | continue; | |
2560 | } | |
2561 | /* | |
2562 | * If the SSID matches as well, it is a | |
2563 | * duplicate of this entry. Keep the bss_idx | |
2564 | * set to this entry so we replace the old | |
2565 | * contents in the table | |
2566 | */ | |
2567 | if ((bss_new_entry->ssid.ssid_len | |
2568 | == adapter->scan_table[bss_idx]. ssid.ssid_len) | |
2569 | && (!memcmp(bss_new_entry->ssid.ssid, | |
2570 | adapter->scan_table[bss_idx].ssid.ssid, | |
2571 | bss_new_entry->ssid.ssid_len))) { | |
2572 | dev_dbg(adapter->dev, "info: SCAN_RESP:" | |
2573 | " duplicate of index: %d\n", bss_idx); | |
2574 | break; | |
2575 | } | |
2576 | } | |
2577 | /* | |
2578 | * If the bss_idx is equal to the number of entries in | |
2579 | * the table, the new entry was not a duplicate; append | |
2580 | * it to the scan table | |
2581 | */ | |
2582 | if (bss_idx == num_in_table) { | |
2583 | /* Range check the bss_idx, keep it limited to | |
2584 | the last entry */ | |
2585 | if (bss_idx == IW_MAX_AP) | |
2586 | bss_idx--; | |
2587 | else | |
2588 | num_in_table++; | |
2589 | } | |
2590 | ||
2591 | /* | |
2592 | * Save the beacon/probe response returned for later application | |
2593 | * retrieval. Duplicate beacon/probe responses are updated if | |
2594 | * possible | |
2595 | */ | |
2596 | mwifiex_ret_802_11_scan_store_beacon(priv, bss_idx, | |
2597 | num_in_table, bss_new_entry); | |
2598 | /* | |
2599 | * If the TSF TLV was appended to the scan results, save this | |
2600 | * entry's TSF value in the networkTSF field.The networkTSF is | |
2601 | * the firmware's TSF value at the time the beacon or probe | |
2602 | * response was received. | |
2603 | */ | |
2604 | if (tsf_tlv) { | |
2605 | memcpy(&tsf_val, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE] | |
2606 | , sizeof(tsf_val)); | |
2607 | memcpy(&bss_new_entry->network_tsf, &tsf_val, | |
2608 | sizeof(bss_new_entry->network_tsf)); | |
2609 | } | |
2610 | band = BAND_G; | |
2611 | if (chan_band_tlv) { | |
2612 | chan_band = &chan_band_tlv->chan_band_param[idx]; | |
2613 | band = mwifiex_radio_type_to_band(chan_band->radio_type | |
2614 | & (BIT(0) | BIT(1))); | |
2615 | } | |
2616 | ||
2617 | /* Save the band designation for this entry for use in join */ | |
2618 | bss_new_entry->bss_band = band; | |
2619 | cfp = mwifiex_get_cfp_by_band_and_channel_from_cfg80211(priv, | |
2620 | (u8) bss_new_entry->bss_band, | |
2621 | (u16)bss_new_entry->channel); | |
2622 | ||
2623 | if (cfp) | |
2624 | bss_new_entry->freq = cfp->freq; | |
2625 | else | |
2626 | bss_new_entry->freq = 0; | |
2627 | ||
2628 | /* Copy the locally created bss_new_entry to the scan table */ | |
2629 | memcpy(&adapter->scan_table[bss_idx], bss_new_entry, | |
2630 | sizeof(adapter->scan_table[bss_idx])); | |
2631 | ||
2632 | } | |
2633 | ||
2634 | dev_dbg(adapter->dev, | |
2635 | "info: SCAN_RESP: Scanned %2d APs, %d valid, %d total\n", | |
2636 | scan_rsp->number_of_sets, | |
2637 | num_in_table - adapter->num_in_scan_table, num_in_table); | |
2638 | ||
2639 | /* Update the total number of BSSIDs in the scan table */ | |
2640 | adapter->num_in_scan_table = num_in_table; | |
2641 | ||
2642 | spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); | |
2643 | if (list_empty(&adapter->scan_pending_q)) { | |
2644 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); | |
2645 | spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags); | |
2646 | adapter->scan_processing = false; | |
2647 | spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags); | |
2648 | /* | |
2649 | * Process the resulting scan table: | |
2650 | * - Remove any bad ssids | |
2651 | * - Update our current BSS information from scan data | |
2652 | */ | |
2653 | mwifiex_process_scan_results(priv); | |
2654 | ||
2655 | /* Need to indicate IOCTL complete */ | |
2656 | wait_queue = (struct mwifiex_wait_queue *) wq_buf; | |
2657 | if (wait_queue) { | |
2658 | wait_queue->status = MWIFIEX_ERROR_NO_ERROR; | |
2659 | ||
2660 | /* Indicate ioctl complete */ | |
2661 | mwifiex_ioctl_complete(adapter, | |
2662 | (struct mwifiex_wait_queue *) wait_queue, 0); | |
2663 | } | |
2664 | if (priv->report_scan_result) | |
2665 | priv->report_scan_result = false; | |
2666 | if (priv->scan_pending_on_block) { | |
2667 | priv->scan_pending_on_block = false; | |
2668 | up(&priv->async_sem); | |
2669 | } | |
2670 | ||
2671 | } else { | |
2672 | /* Get scan command from scan_pending_q and put to | |
2673 | cmd_pending_q */ | |
2674 | cmd_node = list_first_entry(&adapter->scan_pending_q, | |
2675 | struct cmd_ctrl_node, list); | |
2676 | list_del(&cmd_node->list); | |
2677 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); | |
2678 | ||
2679 | mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true); | |
2680 | } | |
2681 | ||
2682 | done: | |
2683 | kfree((u8 *) bss_new_entry); | |
2684 | return ret; | |
2685 | } | |
2686 | ||
2687 | /* | |
2688 | * This function prepares command for background scan query. | |
2689 | * | |
2690 | * Preparation includes - | |
2691 | * - Setting command ID and proper size | |
2692 | * - Setting background scan flush parameter | |
2693 | * - Ensuring correct endian-ness | |
2694 | */ | |
2695 | int mwifiex_cmd_802_11_bg_scan_query(struct mwifiex_private *priv, | |
2696 | struct host_cmd_ds_command *cmd, | |
2697 | void *data_buf) | |
2698 | { | |
2699 | struct host_cmd_ds_802_11_bg_scan_query *bg_query = | |
2700 | &cmd->params.bg_scan_query; | |
2701 | ||
2702 | cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY); | |
2703 | cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query) | |
2704 | + S_DS_GEN); | |
2705 | ||
2706 | bg_query->flush = 1; | |
2707 | ||
2708 | return 0; | |
2709 | } | |
2710 | ||
2711 | /* | |
2712 | * This function finds a SSID in the scan table. | |
2713 | * | |
2714 | * A BSSID may optionally be provided to qualify the SSID. | |
2715 | * For non-Auto mode, further check is made to make sure the | |
2716 | * BSS found in the scan table is compatible with the current | |
2717 | * settings of the driver. | |
2718 | */ | |
2719 | s32 | |
2720 | mwifiex_find_ssid_in_list(struct mwifiex_private *priv, | |
2721 | struct mwifiex_802_11_ssid *ssid, u8 *bssid, | |
2722 | u32 mode) | |
2723 | { | |
2724 | struct mwifiex_adapter *adapter = priv->adapter; | |
2725 | s32 net = -1, j; | |
2726 | u8 best_rssi = 0; | |
2727 | u32 i; | |
2728 | ||
2729 | dev_dbg(adapter->dev, "info: num of entries in table = %d\n", | |
2730 | adapter->num_in_scan_table); | |
2731 | ||
2732 | /* | |
2733 | * Loop through the table until the maximum is reached or until a match | |
2734 | * is found based on the bssid field comparison | |
2735 | */ | |
2736 | for (i = 0; | |
2737 | i < adapter->num_in_scan_table && (!bssid || (bssid && net < 0)); | |
2738 | i++) { | |
2739 | if (!mwifiex_ssid_cmp(&adapter->scan_table[i].ssid, ssid) && | |
2740 | (!bssid | |
2741 | || !memcmp(adapter->scan_table[i].mac_address, bssid, | |
2742 | ETH_ALEN)) | |
2743 | && | |
2744 | (mwifiex_get_cfp_by_band_and_channel_from_cfg80211 | |
2745 | (priv, (u8) adapter->scan_table[i].bss_band, | |
2746 | (u16) adapter->scan_table[i].channel))) { | |
2747 | switch (mode) { | |
eecd8250 BZ |
2748 | case NL80211_IFTYPE_STATION: |
2749 | case NL80211_IFTYPE_ADHOC: | |
5e6e3a92 BZ |
2750 | j = mwifiex_is_network_compatible(priv, i, |
2751 | mode); | |
2752 | ||
2753 | if (j >= 0) { | |
2754 | if (SCAN_RSSI | |
2755 | (adapter->scan_table[i].rssi) > | |
2756 | best_rssi) { | |
2757 | best_rssi = SCAN_RSSI(adapter-> | |
2758 | scan_table | |
2759 | [i].rssi); | |
2760 | net = i; | |
2761 | } | |
2762 | } else { | |
2763 | if (net == -1) | |
2764 | net = j; | |
2765 | } | |
2766 | break; | |
eecd8250 | 2767 | case NL80211_IFTYPE_UNSPECIFIED: |
5e6e3a92 BZ |
2768 | default: |
2769 | /* | |
2770 | * Do not check compatibility if the mode | |
2771 | * requested is Auto/Unknown. Allows generic | |
2772 | * find to work without verifying against the | |
2773 | * Adapter security settings | |
2774 | */ | |
2775 | if (SCAN_RSSI(adapter->scan_table[i].rssi) > | |
2776 | best_rssi) { | |
2777 | best_rssi = SCAN_RSSI(adapter-> | |
2778 | scan_table[i].rssi); | |
2779 | net = i; | |
2780 | } | |
2781 | break; | |
2782 | } | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | return net; | |
2787 | } | |
2788 | ||
2789 | /* | |
2790 | * This function finds a specific compatible BSSID in the scan list. | |
2791 | * | |
2792 | * This function loops through the scan table looking for a compatible | |
2793 | * match. If a BSSID matches, but the BSS is found to be not compatible | |
2794 | * the function ignores it and continues to search through the rest of | |
2795 | * the entries in case there is an AP with multiple SSIDs assigned to | |
2796 | * the same BSSID. | |
2797 | */ | |
2798 | s32 | |
2799 | mwifiex_find_bssid_in_list(struct mwifiex_private *priv, u8 *bssid, | |
2800 | u32 mode) | |
2801 | { | |
2802 | struct mwifiex_adapter *adapter = priv->adapter; | |
2803 | s32 net = -1; | |
2804 | u32 i; | |
2805 | ||
2806 | if (!bssid) | |
2807 | return -1; | |
2808 | ||
2809 | dev_dbg(adapter->dev, "info: FindBSSID: Num of BSSIDs = %d\n", | |
2810 | adapter->num_in_scan_table); | |
2811 | ||
2812 | /* | |
2813 | * Look through the scan table for a compatible match. The ret return | |
2814 | * variable will be equal to the index in the scan table (greater | |
2815 | * than zero) if the network is compatible. The loop will continue | |
2816 | * past a matched bssid that is not compatible in case there is an | |
2817 | * AP with multiple SSIDs assigned to the same BSSID | |
2818 | */ | |
2819 | for (i = 0; net < 0 && i < adapter->num_in_scan_table; i++) { | |
2820 | if (!memcmp | |
2821 | (adapter->scan_table[i].mac_address, bssid, ETH_ALEN) | |
2822 | && mwifiex_get_cfp_by_band_and_channel_from_cfg80211 | |
2823 | (priv, | |
2824 | (u8) adapter-> | |
2825 | scan_table[i]. | |
2826 | bss_band, | |
2827 | (u16) adapter-> | |
2828 | scan_table[i]. | |
2829 | channel)) { | |
2830 | switch (mode) { | |
eecd8250 BZ |
2831 | case NL80211_IFTYPE_STATION: |
2832 | case NL80211_IFTYPE_ADHOC: | |
5e6e3a92 BZ |
2833 | net = mwifiex_is_network_compatible(priv, i, |
2834 | mode); | |
2835 | break; | |
2836 | default: | |
2837 | net = i; | |
2838 | break; | |
2839 | } | |
2840 | } | |
2841 | } | |
2842 | ||
2843 | return net; | |
2844 | } | |
2845 | ||
2846 | /* | |
2847 | * This function inserts scan command node to the scan pending queue. | |
2848 | */ | |
2849 | void | |
2850 | mwifiex_queue_scan_cmd(struct mwifiex_private *priv, | |
2851 | struct cmd_ctrl_node *cmd_node) | |
2852 | { | |
2853 | struct mwifiex_adapter *adapter = priv->adapter; | |
2854 | unsigned long flags; | |
2855 | ||
2856 | spin_lock_irqsave(&adapter->scan_pending_q_lock, flags); | |
2857 | list_add_tail(&cmd_node->list, &adapter->scan_pending_q); | |
2858 | spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags); | |
2859 | } | |
2860 | ||
2861 | /* | |
2862 | * This function finds an AP with specific ssid in the scan list. | |
2863 | */ | |
2864 | int mwifiex_find_best_network(struct mwifiex_private *priv, | |
2865 | struct mwifiex_ssid_bssid *req_ssid_bssid) | |
2866 | { | |
2867 | struct mwifiex_adapter *adapter = priv->adapter; | |
2868 | struct mwifiex_bssdescriptor *req_bss; | |
2869 | s32 i; | |
2870 | ||
2871 | memset(req_ssid_bssid, 0, sizeof(struct mwifiex_ssid_bssid)); | |
2872 | ||
2873 | i = mwifiex_find_best_network_in_list(priv); | |
2874 | ||
2875 | if (i >= 0) { | |
2876 | req_bss = &adapter->scan_table[i]; | |
2877 | memcpy(&req_ssid_bssid->ssid, &req_bss->ssid, | |
2878 | sizeof(struct mwifiex_802_11_ssid)); | |
2879 | memcpy((u8 *) &req_ssid_bssid->bssid, | |
2880 | (u8 *) &req_bss->mac_address, ETH_ALEN); | |
2881 | ||
2882 | /* Make sure we are in the right mode */ | |
eecd8250 | 2883 | if (priv->bss_mode == NL80211_IFTYPE_UNSPECIFIED) |
5e6e3a92 BZ |
2884 | priv->bss_mode = req_bss->bss_mode; |
2885 | } | |
2886 | ||
2887 | if (!req_ssid_bssid->ssid.ssid_len) | |
2888 | return -1; | |
2889 | ||
2890 | dev_dbg(adapter->dev, "info: Best network found = [%s], " | |
2891 | "[%pM]\n", req_ssid_bssid->ssid.ssid, | |
2892 | req_ssid_bssid->bssid); | |
2893 | ||
2894 | return 0; | |
2895 | } | |
2896 | ||
2897 | /* | |
2898 | * This function sends a scan command for all available channels to the | |
2899 | * firmware, filtered on a specific SSID. | |
2900 | */ | |
2901 | static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv, | |
2902 | void *wait_buf, u16 action, | |
2903 | struct mwifiex_802_11_ssid *req_ssid, | |
2904 | struct mwifiex_scan_resp *scan_resp) | |
2905 | { | |
2906 | struct mwifiex_adapter *adapter = priv->adapter; | |
2907 | int ret = 0; | |
2908 | struct mwifiex_user_scan_cfg *scan_cfg; | |
2909 | ||
2910 | if (!req_ssid) | |
2911 | return -1; | |
2912 | ||
2913 | if (action == HostCmd_ACT_GEN_GET) { | |
2914 | if (scan_resp) { | |
2915 | scan_resp->scan_table = | |
2916 | (u8 *) &priv->curr_bss_params.bss_descriptor; | |
2917 | scan_resp->num_in_scan_table = | |
2918 | adapter->num_in_scan_table; | |
2919 | } else { | |
2920 | ret = -1; | |
2921 | } | |
2922 | return ret; | |
2923 | } | |
2924 | ||
2925 | if (adapter->scan_processing && action == HostCmd_ACT_GEN_SET) { | |
2926 | dev_dbg(adapter->dev, "cmd: Scan already in process...\n"); | |
2927 | return ret; | |
2928 | } | |
2929 | ||
2930 | if (priv->scan_block && action == HostCmd_ACT_GEN_SET) { | |
2931 | dev_dbg(adapter->dev, | |
2932 | "cmd: Scan is blocked during association...\n"); | |
2933 | return ret; | |
2934 | } | |
2935 | ||
2936 | mwifiex_scan_delete_ssid_table_entry(priv, req_ssid); | |
2937 | ||
2938 | scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL); | |
2939 | if (!scan_cfg) { | |
2940 | dev_err(adapter->dev, "failed to alloc scan_cfg\n"); | |
2941 | return -1; | |
2942 | } | |
2943 | ||
2944 | memcpy(scan_cfg->ssid_list[0].ssid, req_ssid->ssid, | |
2945 | req_ssid->ssid_len); | |
2946 | scan_cfg->keep_previous_scan = true; | |
2947 | ||
2948 | ret = mwifiex_scan_networks(priv, wait_buf, action, scan_cfg, NULL); | |
2949 | ||
2950 | kfree(scan_cfg); | |
2951 | return ret; | |
2952 | } | |
2953 | ||
2954 | /* | |
2955 | * Sends IOCTL request to start a scan. | |
2956 | * | |
2957 | * This function allocates the IOCTL request buffer, fills it | |
2958 | * with requisite parameters and calls the IOCTL handler. | |
2959 | * | |
2960 | * Scan command can be issued for both normal scan and specific SSID | |
2961 | * scan, depending upon whether an SSID is provided or not. | |
2962 | */ | |
2963 | int mwifiex_request_scan(struct mwifiex_private *priv, u8 wait_option, | |
2964 | struct mwifiex_802_11_ssid *req_ssid) | |
2965 | { | |
2966 | int ret = 0; | |
2967 | struct mwifiex_wait_queue *wait = NULL; | |
2968 | int status = 0; | |
2969 | ||
2970 | if (down_interruptible(&priv->async_sem)) { | |
2971 | dev_err(priv->adapter->dev, "%s: acquire semaphore\n", | |
2972 | __func__); | |
2973 | return -1; | |
2974 | } | |
2975 | priv->scan_pending_on_block = true; | |
2976 | ||
2977 | /* Allocate wait request buffer */ | |
2978 | wait = mwifiex_alloc_fill_wait_queue(priv, wait_option); | |
2979 | if (!wait) { | |
2980 | ret = -1; | |
2981 | goto done; | |
2982 | } | |
2983 | ||
2984 | if (req_ssid && req_ssid->ssid_len != 0) | |
2985 | /* Specific SSID scan */ | |
2986 | status = mwifiex_scan_specific_ssid(priv, wait, | |
2987 | HostCmd_ACT_GEN_SET, | |
2988 | req_ssid, NULL); | |
2989 | else | |
2990 | /* Normal scan */ | |
2991 | status = mwifiex_scan_networks(priv, wait, HostCmd_ACT_GEN_SET, | |
2992 | NULL, NULL); | |
2993 | status = mwifiex_request_ioctl(priv, wait, status, wait_option); | |
2994 | if (status == -1) | |
2995 | ret = -1; | |
2996 | done: | |
2997 | if ((wait) && (status != -EINPROGRESS)) | |
2998 | kfree(wait); | |
2999 | if (ret == -1) { | |
3000 | priv->scan_pending_on_block = false; | |
3001 | up(&priv->async_sem); | |
3002 | } | |
3003 | return ret; | |
3004 | } | |
3005 | ||
3006 | /* | |
3007 | * This function appends the vendor specific IE TLV to a buffer. | |
3008 | */ | |
3009 | int | |
3010 | mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv, | |
3011 | u16 vsie_mask, u8 **buffer) | |
3012 | { | |
3013 | int id, ret_len = 0; | |
3014 | struct mwifiex_ie_types_vendor_param_set *vs_param_set; | |
3015 | ||
3016 | if (!buffer) | |
3017 | return 0; | |
3018 | if (!(*buffer)) | |
3019 | return 0; | |
3020 | ||
3021 | /* | |
3022 | * Traverse through the saved vendor specific IE array and append | |
3023 | * the selected(scan/assoc/adhoc) IE as TLV to the command | |
3024 | */ | |
3025 | for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) { | |
3026 | if (priv->vs_ie[id].mask & vsie_mask) { | |
3027 | vs_param_set = | |
3028 | (struct mwifiex_ie_types_vendor_param_set *) | |
3029 | *buffer; | |
3030 | vs_param_set->header.type = | |
3031 | cpu_to_le16(TLV_TYPE_PASSTHROUGH); | |
3032 | vs_param_set->header.len = | |
3033 | cpu_to_le16((((u16) priv->vs_ie[id].ie[1]) | |
3034 | & 0x00FF) + 2); | |
3035 | memcpy(vs_param_set->ie, priv->vs_ie[id].ie, | |
3036 | le16_to_cpu(vs_param_set->header.len)); | |
3037 | *buffer += le16_to_cpu(vs_param_set->header.len) + | |
3038 | sizeof(struct mwifiex_ie_types_header); | |
3039 | ret_len += le16_to_cpu(vs_param_set->header.len) + | |
3040 | sizeof(struct mwifiex_ie_types_header); | |
3041 | } | |
3042 | } | |
3043 | return ret_len; | |
3044 | } | |
3045 | ||
3046 | /* | |
3047 | * This function saves a beacon buffer of the current BSS descriptor. | |
3048 | * | |
3049 | * The current beacon buffer is saved so that it can be restored in the | |
3050 | * following cases that makes the beacon buffer not to contain the current | |
3051 | * ssid's beacon buffer. | |
3052 | * - The current ssid was not found somehow in the last scan. | |
3053 | * - The current ssid was the last entry of the scan table and overloaded. | |
3054 | */ | |
3055 | void | |
3056 | mwifiex_save_curr_bcn(struct mwifiex_private *priv) | |
3057 | { | |
3058 | struct mwifiex_bssdescriptor *curr_bss = | |
3059 | &priv->curr_bss_params.bss_descriptor; | |
3060 | ||
3061 | /* save the beacon buffer if it is not saved or updated */ | |
3062 | if ((priv->curr_bcn_buf == NULL) || | |
3063 | (priv->curr_bcn_size != curr_bss->beacon_buf_size) || | |
3064 | (memcmp(priv->curr_bcn_buf, curr_bss->beacon_buf, | |
3065 | curr_bss->beacon_buf_size))) { | |
3066 | ||
3067 | kfree(priv->curr_bcn_buf); | |
3068 | priv->curr_bcn_buf = NULL; | |
3069 | ||
3070 | priv->curr_bcn_size = curr_bss->beacon_buf_size; | |
3071 | if (!priv->curr_bcn_size) | |
3072 | return; | |
3073 | ||
3074 | priv->curr_bcn_buf = kzalloc(curr_bss->beacon_buf_size, | |
3075 | GFP_KERNEL); | |
3076 | if (!priv->curr_bcn_buf) { | |
3077 | dev_err(priv->adapter->dev, | |
3078 | "failed to alloc curr_bcn_buf\n"); | |
3079 | } else { | |
3080 | memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf, | |
3081 | curr_bss->beacon_buf_size); | |
3082 | dev_dbg(priv->adapter->dev, | |
3083 | "info: current beacon saved %d\n", | |
3084 | priv->curr_bcn_size); | |
3085 | } | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | /* | |
3090 | * This function frees the current BSS descriptor beacon buffer. | |
3091 | */ | |
3092 | void | |
3093 | mwifiex_free_curr_bcn(struct mwifiex_private *priv) | |
3094 | { | |
3095 | kfree(priv->curr_bcn_buf); | |
3096 | priv->curr_bcn_buf = NULL; | |
3097 | } |