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[PATCH] libertas: clean up indentation in libertas_association_worker
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / wireless / libertas / scan.c
CommitLineData
876c9d3a
MT		 1/**
2 * Functions implementing wlan scan IOCTL and firmware command APIs
3 *
4 * IOCTL handlers as well as command preperation and response routines
5 * for sending scan commands to the firmware.
6 */
7#include <linux/ctype.h>
8#include <linux/if.h>
9#include <linux/netdevice.h>
10#include <linux/wireless.h>
fcdb53db 11#include <linux/etherdevice.h>
876c9d3a
MT		 12
13#include <net/ieee80211.h>
14#include <net/iw_handler.h>
15
16#include "host.h"
17#include "decl.h"
18#include "dev.h"
19#include "scan.h"
20
21//! Approximate amount of data needed to pass a scan result back to iwlist
22#define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
23 + IW_ESSID_MAX_SIZE \
24 + IW_EV_UINT_LEN \
25 + IW_EV_FREQ_LEN \
26 + IW_EV_QUAL_LEN \
27 + IW_ESSID_MAX_SIZE \
28 + IW_EV_PARAM_LEN \
29 + 40) /* 40 for WPAIE */
30
31//! Memory needed to store a max sized channel List TLV for a firmware scan
32#define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
33 + (MRVDRV_MAX_CHANNELS_PER_SCAN \
34 * sizeof(struct chanscanparamset)))
35
36//! Memory needed to store a max number/size SSID TLV for a firmware scan
37#define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
38
39//! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
40#define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \
41 + sizeof(struct mrvlietypes_numprobes) \
42 + CHAN_TLV_MAX_SIZE \
43 + SSID_TLV_MAX_SIZE)
44
45//! The maximum number of channels the firmware can scan per command
46#define MRVDRV_MAX_CHANNELS_PER_SCAN 14
47
48/**
49 * @brief Number of channels to scan per firmware scan command issuance.
50 *
51 * Number restricted to prevent hitting the limit on the amount of scan data
52 * returned in a single firmware scan command.
53 */
54#define MRVDRV_CHANNELS_PER_SCAN_CMD 4
55
56//! Scan time specified in the channel TLV for each channel for passive scans
57#define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
58
59//! Scan time specified in the channel TLV for each channel for active scans
60#define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
61
123e0e04
DW		 62static const u8 zeromac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
63static const u8 bcastmac[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
eb8f7330 64
fcdb53db
DW		 65static inline void clear_bss_descriptor (struct bss_descriptor * bss)
66{
67 /* Don't blow away ->list, just BSS data */
68 memset(bss, 0, offsetof(struct bss_descriptor, list));
69}
70
71static inline int match_bss_no_security(struct wlan_802_11_security * secinfo,
72 struct bss_descriptor * match_bss)
73{
74 if ( !secinfo->wep_enabled
75 && !secinfo->WPAenabled
76 && !secinfo->WPA2enabled
77 && match_bss->wpa_ie[0] != WPA_IE
78 && match_bss->rsn_ie[0] != WPA2_IE
0c9ca690 79 && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
fcdb53db
DW		 80 return 1;
81 }
82 return 0;
83}
84
85static inline int match_bss_static_wep(struct wlan_802_11_security * secinfo,
86 struct bss_descriptor * match_bss)
87{
88 if ( secinfo->wep_enabled
89 && !secinfo->WPAenabled
90 && !secinfo->WPA2enabled
0c9ca690 91 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
fcdb53db
DW		 92 return 1;
93 }
94 return 0;
95}
96
97static inline int match_bss_wpa(struct wlan_802_11_security * secinfo,
98 struct bss_descriptor * match_bss)
99{
100 if ( !secinfo->wep_enabled
101 && secinfo->WPAenabled
fcdb53db
DW		 102 && (match_bss->wpa_ie[0] == WPA_IE)
103 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
0c9ca690
DW		 104 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
105 */
fcdb53db
DW		 106 ) {
107 return 1;
108 }
109 return 0;
110}
111
112static inline int match_bss_wpa2(struct wlan_802_11_security * secinfo,
113 struct bss_descriptor * match_bss)
114{
115 if ( !secinfo->wep_enabled
fcdb53db
DW		 116 && secinfo->WPA2enabled
117 && (match_bss->rsn_ie[0] == WPA2_IE)
118 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
0c9ca690
DW		 119 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
120 */
fcdb53db
DW		 121 ) {
122 return 1;
123 }
124 return 0;
125}
126
127static inline int match_bss_dynamic_wep(struct wlan_802_11_security * secinfo,
128 struct bss_descriptor * match_bss)
129{
130 if ( !secinfo->wep_enabled
131 && !secinfo->WPAenabled
132 && !secinfo->WPA2enabled
133 && (match_bss->wpa_ie[0] != WPA_IE)
134 && (match_bss->rsn_ie[0] != WPA2_IE)
0c9ca690 135 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
fcdb53db
DW		 136 return 1;
137 }
138 return 0;
139}
876c9d3a
MT		 140
141/**
142 * @brief Check if a scanned network compatible with the driver settings
143 *
144 * WEP WPA WPA2 ad-hoc encrypt Network
145 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
146 * 0 0 0 0 NONE 0 0 0 yes No security
147 * 1 0 0 0 NONE 1 0 0 yes Static WEP
148 * 0 1 0 0 x 1x 1 x yes WPA
149 * 0 0 1 0 x 1x x 1 yes WPA2
150 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
151 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
152 *
153 *
154 * @param adapter A pointer to wlan_adapter
155 * @param index Index in scantable to check against current driver settings
156 * @param mode Network mode: Infrastructure or IBSS
157 *
158 * @return Index in scantable, or error code if negative
159 */
fcdb53db
DW		 160static int is_network_compatible(wlan_adapter * adapter,
161 struct bss_descriptor * bss, u8 mode)
876c9d3a 162{
fcdb53db
DW		 163 int matched = 0;
164
9012b28a 165 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a 166
fcdb53db
DW		 167 if (bss->mode != mode)
168 goto done;
876c9d3a 169
fcdb53db
DW		 170 if ((matched = match_bss_no_security(&adapter->secinfo, bss))) {
171 goto done;
172 } else if ((matched = match_bss_static_wep(&adapter->secinfo, bss))) {
173 goto done;
174 } else if ((matched = match_bss_wpa(&adapter->secinfo, bss))) {
175 lbs_deb_scan(
176 "is_network_compatible() WPA: wpa_ie=%#x "
177 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
178 "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0],
889c05bd
DW		 179 adapter->secinfo.wep_enabled ? "e" : "d",
180 adapter->secinfo.WPAenabled ? "e" : "d",
181 adapter->secinfo.WPA2enabled ? "e" : "d",
0c9ca690 182 (bss->capability & WLAN_CAPABILITY_PRIVACY));
fcdb53db
DW		 183 goto done;
184 } else if ((matched = match_bss_wpa2(&adapter->secinfo, bss))) {
185 lbs_deb_scan(
186 "is_network_compatible() WPA2: wpa_ie=%#x "
187 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
188 "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0],
189 adapter->secinfo.wep_enabled ? "e" : "d",
190 adapter->secinfo.WPAenabled ? "e" : "d",
191 adapter->secinfo.WPA2enabled ? "e" : "d",
0c9ca690 192 (bss->capability & WLAN_CAPABILITY_PRIVACY));
fcdb53db
DW		 193 goto done;
194 } else if ((matched = match_bss_dynamic_wep(&adapter->secinfo, bss))) {
195 lbs_deb_scan(
196 "is_network_compatible() dynamic WEP: "
197 "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
0c9ca690
DW		 198 bss->wpa_ie[0], bss->rsn_ie[0],
199 (bss->capability & WLAN_CAPABILITY_PRIVACY));
9012b28a 200 goto done;
876c9d3a
MT		 201 }
202
fcdb53db
DW		 203 /* bss security settings don't match those configured on card */
204 lbs_deb_scan(
205 "is_network_compatible() FAILED: wpa_ie=%#x "
206 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
207 bss->wpa_ie[0], bss->rsn_ie[0],
208 adapter->secinfo.wep_enabled ? "e" : "d",
209 adapter->secinfo.WPAenabled ? "e" : "d",
210 adapter->secinfo.WPA2enabled ? "e" : "d",
0c9ca690 211 (bss->capability & WLAN_CAPABILITY_PRIVACY));
9012b28a
HS		 212
213done:
fcdb53db
DW		 214 lbs_deb_leave(LBS_DEB_SCAN);
215 return matched;
876c9d3a
MT		 216}
217
876c9d3a
MT		 218/**
219 * @brief Create a channel list for the driver to scan based on region info
220 *
221 * Use the driver region/band information to construct a comprehensive list
222 * of channels to scan. This routine is used for any scan that is not
223 * provided a specific channel list to scan.
224 *
225 * @param priv A pointer to wlan_private structure
226 * @param scanchanlist Output parameter: resulting channel list to scan
227 * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
228 * is being sent in the command to firmware. Used to
229 * increase the number of channels sent in a scan
230 * command and to disable the firmware channel scan
231 * filter.
232 *
233 * @return void
234 */
235static void wlan_scan_create_channel_list(wlan_private * priv,
236 struct chanscanparamset * scanchanlist,
237 u8 filteredscan)
238{
239
240 wlan_adapter *adapter = priv->adapter;
241 struct region_channel *scanregion;
242 struct chan_freq_power *cfp;
243 int rgnidx;
244 int chanidx;
245 int nextchan;
246 u8 scantype;
247
248 chanidx = 0;
249
250 /* Set the default scan type to the user specified type, will later
251 * be changed to passive on a per channel basis if restricted by
252 * regulatory requirements (11d or 11h)
253 */
254 scantype = adapter->scantype;
255
256 for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
257 if (priv->adapter->enable11d &&
258 adapter->connect_status != libertas_connected) {
259 /* Scan all the supported chan for the first scan */
260 if (!adapter->universal_channel[rgnidx].valid)
261 continue;
262 scanregion = &adapter->universal_channel[rgnidx];
263
264 /* clear the parsed_region_chan for the first scan */
265 memset(&adapter->parsed_region_chan, 0x00,
266 sizeof(adapter->parsed_region_chan));
267 } else {
268 if (!adapter->region_channel[rgnidx].valid)
269 continue;
270 scanregion = &adapter->region_channel[rgnidx];
271 }
272
273 for (nextchan = 0;
274 nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
275
276 cfp = scanregion->CFP + nextchan;
277
278 if (priv->adapter->enable11d) {
279 scantype =
280 libertas_get_scan_type_11d(cfp->channel,
281 &adapter->
282 parsed_region_chan);
283 }
284
285 switch (scanregion->band) {
286 case BAND_B:
287 case BAND_G:
288 default:
289 scanchanlist[chanidx].radiotype =
290 cmd_scan_radio_type_bg;
291 break;
292 }
293
294 if (scantype == cmd_scan_type_passive) {
295 scanchanlist[chanidx].maxscantime =
981f187b 296 cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME);
876c9d3a
MT		 297 scanchanlist[chanidx].chanscanmode.passivescan =
298 1;
299 } else {
300 scanchanlist[chanidx].maxscantime =
981f187b 301 cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME);
876c9d3a
MT		 302 scanchanlist[chanidx].chanscanmode.passivescan =
303 0;
304 }
305
306 scanchanlist[chanidx].channumber = cfp->channel;
307
308 if (filteredscan) {
309 scanchanlist[chanidx].chanscanmode.
310 disablechanfilt = 1;
311 }
312 }
313 }
314}
315
316/**
317 * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
318 *
319 * Application layer or other functions can invoke wlan_scan_networks
320 * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
321 * This structure is used as the basis of one or many wlan_scan_cmd_config
322 * commands that are sent to the command processing module and sent to
323 * firmware.
324 *
325 * Create a wlan_scan_cmd_config based on the following user supplied
326 * parameters (if present):
327 * - SSID filter
328 * - BSSID filter
329 * - Number of Probes to be sent
330 * - channel list
331 *
332 * If the SSID or BSSID filter is not present, disable/clear the filter.
333 * If the number of probes is not set, use the adapter default setting
334 * Qualify the channel
335 *
336 * @param priv A pointer to wlan_private structure
337 * @param puserscanin NULL or pointer to scan configuration parameters
338 * @param ppchantlvout Output parameter: Pointer to the start of the
339 * channel TLV portion of the output scan config
340 * @param pscanchanlist Output parameter: Pointer to the resulting channel
341 * list to scan
342 * @param pmaxchanperscan Output parameter: Number of channels to scan for
343 * each issuance of the firmware scan command
344 * @param pfilteredscan Output parameter: Flag indicating whether or not
345 * a BSSID or SSID filter is being sent in the
346 * command to firmware. Used to increase the number
347 * of channels sent in a scan command and to
348 * disable the firmware channel scan filter.
349 * @param pscancurrentonly Output parameter: Flag indicating whether or not
350 * we are only scanning our current active channel
351 *
352 * @return resulting scan configuration
353 */
354static struct wlan_scan_cmd_config *
355wlan_scan_setup_scan_config(wlan_private * priv,
356 const struct wlan_ioctl_user_scan_cfg * puserscanin,
357 struct mrvlietypes_chanlistparamset ** ppchantlvout,
358 struct chanscanparamset * pscanchanlist,
359 int *pmaxchanperscan,
360 u8 * pfilteredscan,
361 u8 * pscancurrentonly)
362{
363 wlan_adapter *adapter = priv->adapter;
876c9d3a
MT		 364 struct mrvlietypes_numprobes *pnumprobestlv;
365 struct mrvlietypes_ssidparamset *pssidtlv;
366 struct wlan_scan_cmd_config * pscancfgout = NULL;
367 u8 *ptlvpos;
368 u16 numprobes;
876c9d3a
MT		 369 int chanidx;
370 int scantype;
371 int scandur;
372 int channel;
373 int radiotype;
374
375 pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
376 if (pscancfgout == NULL)
377 goto out;
378
379 /* The tlvbufferlen is calculated for each scan command. The TLVs added
380 * in this routine will be preserved since the routine that sends
381 * the command will append channelTLVs at *ppchantlvout. The difference
382 * between the *ppchantlvout and the tlvbuffer start will be used
383 * to calculate the size of anything we add in this routine.
384 */
385 pscancfgout->tlvbufferlen = 0;
386
387 /* Running tlv pointer. Assigned to ppchantlvout at end of function
388 * so later routines know where channels can be added to the command buf
389 */
390 ptlvpos = pscancfgout->tlvbuffer;
391
392 /*
393 * Set the initial scan paramters for progressive scanning. If a specific
394 * BSSID or SSID is used, the number of channels in the scan command
395 * will be increased to the absolute maximum
396 */
397 *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
398
399 /* Initialize the scan as un-filtered by firmware, set to TRUE below if
400 * a SSID or BSSID filter is sent in the command
401 */
402 *pfilteredscan = 0;
403
404 /* Initialize the scan as not being only on the current channel. If
405 * the channel list is customized, only contains one channel, and
406 * is the active channel, this is set true and data flow is not halted.
407 */
408 *pscancurrentonly = 0;
409
410 if (puserscanin) {
411
412 /* Set the bss type scan filter, use adapter setting if unset */
413 pscancfgout->bsstype =
414 (puserscanin->bsstype ? puserscanin->bsstype : adapter->
415 scanmode);
416
417 /* Set the number of probes to send, use adapter setting if unset */
418 numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
419 adapter->scanprobes);
420
421 /*
422 * Set the BSSID filter to the incoming configuration,
423 * if non-zero. If not set, it will remain disabled (all zeros).
424 */
eb8f7330
DW		 425 memcpy(pscancfgout->bssid, puserscanin->bssid,
426 sizeof(pscancfgout->bssid));
876c9d3a 427
eb8f7330 428 if (puserscanin->ssid_len) {
876c9d3a
MT		 429 pssidtlv =
430 (struct mrvlietypes_ssidparamset *) pscancfgout->
431 tlvbuffer;
432 pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
eb8f7330
DW		 433 pssidtlv->header.len = cpu_to_le16(puserscanin->ssid_len);
434 memcpy(pssidtlv->ssid, puserscanin->ssid,
435 puserscanin->ssid_len);
436 ptlvpos += sizeof(pssidtlv->header) + puserscanin->ssid_len;
876c9d3a
MT		 437 }
438
439 /*
440 * The default number of channels sent in the command is low to
441 * ensure the response buffer from the firmware does not truncate
442 * scan results. That is not an issue with an SSID or BSSID
443 * filter applied to the scan results in the firmware.
444 */
eb8f7330
DW		 445 if ( puserscanin->ssid_len
446 || (compare_ether_addr(pscancfgout->bssid, &zeromac[0]) != 0)) {
876c9d3a
MT		 447 *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
448 *pfilteredscan = 1;
449 }
450 } else {
451 pscancfgout->bsstype = adapter->scanmode;
452 numprobes = adapter->scanprobes;
453 }
454
455 /* If the input config or adapter has the number of Probes set, add tlv */
456 if (numprobes) {
457 pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
981f187b
DW		 458 pnumprobestlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
459 pnumprobestlv->header.len = cpu_to_le16(2);
876c9d3a
MT		 460 pnumprobestlv->numprobes = cpu_to_le16(numprobes);
461
981f187b 462 ptlvpos += sizeof(*pnumprobestlv);
876c9d3a
MT		 463 }
464
465 /*
466 * Set the output for the channel TLV to the address in the tlv buffer
467 * past any TLVs that were added in this fuction (SSID, numprobes).
468 * channel TLVs will be added past this for each scan command, preserving
469 * the TLVs that were previously added.
470 */
471 *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
472
473 if (puserscanin && puserscanin->chanlist[0].channumber) {
474
9012b28a 475 lbs_deb_scan("Scan: Using supplied channel list\n");
876c9d3a
MT		 476
477 for (chanidx = 0;
478 chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
479 && puserscanin->chanlist[chanidx].channumber; chanidx++) {
480
481 channel = puserscanin->chanlist[chanidx].channumber;
482 (pscanchanlist + chanidx)->channumber = channel;
483
484 radiotype = puserscanin->chanlist[chanidx].radiotype;
485 (pscanchanlist + chanidx)->radiotype = radiotype;
486
487 scantype = puserscanin->chanlist[chanidx].scantype;
488
489 if (scantype == cmd_scan_type_passive) {
490 (pscanchanlist +
491 chanidx)->chanscanmode.passivescan = 1;
492 } else {
493 (pscanchanlist +
494 chanidx)->chanscanmode.passivescan = 0;
495 }
496
497 if (puserscanin->chanlist[chanidx].scantime) {
498 scandur =
499 puserscanin->chanlist[chanidx].scantime;
500 } else {
501 if (scantype == cmd_scan_type_passive) {
502 scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
503 } else {
504 scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
505 }
506 }
507
508 (pscanchanlist + chanidx)->minscantime =
509 cpu_to_le16(scandur);
510 (pscanchanlist + chanidx)->maxscantime =
511 cpu_to_le16(scandur);
512 }
513
514 /* Check if we are only scanning the current channel */
515 if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
516 ==
517 priv->adapter->curbssparams.channel)) {
518 *pscancurrentonly = 1;
9012b28a 519 lbs_deb_scan("Scan: Scanning current channel only");
876c9d3a
MT		 520 }
521
522 } else {
9012b28a 523 lbs_deb_scan("Scan: Creating full region channel list\n");
876c9d3a
MT		 524 wlan_scan_create_channel_list(priv, pscanchanlist,
525 *pfilteredscan);
526 }
527
528out:
529 return pscancfgout;
530}
531
532/**
533 * @brief Construct and send multiple scan config commands to the firmware
534 *
535 * Previous routines have created a wlan_scan_cmd_config with any requested
536 * TLVs. This function splits the channel TLV into maxchanperscan lists
537 * and sends the portion of the channel TLV along with the other TLVs
538 * to the wlan_cmd routines for execution in the firmware.
539 *
540 * @param priv A pointer to wlan_private structure
541 * @param maxchanperscan Maximum number channels to be included in each
542 * scan command sent to firmware
543 * @param filteredscan Flag indicating whether or not a BSSID or SSID
544 * filter is being used for the firmware command
545 * scan command sent to firmware
546 * @param pscancfgout Scan configuration used for this scan.
547 * @param pchantlvout Pointer in the pscancfgout where the channel TLV
548 * should start. This is past any other TLVs that
549 * must be sent down in each firmware command.
550 * @param pscanchanlist List of channels to scan in maxchanperscan segments
551 *
552 * @return 0 or error return otherwise
553 */
554static int wlan_scan_channel_list(wlan_private * priv,
555 int maxchanperscan,
556 u8 filteredscan,
557 struct wlan_scan_cmd_config * pscancfgout,
558 struct mrvlietypes_chanlistparamset * pchantlvout,
064827ed 559 struct chanscanparamset * pscanchanlist,
2be92196
MT		 560 const struct wlan_ioctl_user_scan_cfg * puserscanin,
561 int full_scan)
876c9d3a
MT		 562{
563 struct chanscanparamset *ptmpchan;
564 struct chanscanparamset *pstartchan;
565 u8 scanband;
566 int doneearly;
567 int tlvidx;
568 int ret = 0;
064827ed
MT		 569 int scanned = 0;
570 union iwreq_data wrqu;
876c9d3a 571
9012b28a 572 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a
MT		 573
574 if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
9012b28a 575 lbs_deb_scan("Scan: Null detect: %p, %p, %p\n",
876c9d3a
MT		 576 pscancfgout, pchantlvout, pscanchanlist);
577 return -1;
578 }
579
580 pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
581
582 /* Set the temp channel struct pointer to the start of the desired list */
583 ptmpchan = pscanchanlist;
584
064827ed
MT		 585 if (priv->adapter->last_scanned_channel && !puserscanin)
586 ptmpchan += priv->adapter->last_scanned_channel;
587
876c9d3a
MT		 588 /* Loop through the desired channel list, sending a new firmware scan
589 * commands for each maxchanperscan channels (or for 1,6,11 individually
590 * if configured accordingly)
591 */
592 while (ptmpchan->channumber) {
593
594 tlvidx = 0;
595 pchantlvout->header.len = 0;
596 scanband = ptmpchan->radiotype;
597 pstartchan = ptmpchan;
598 doneearly = 0;
599
600 /* Construct the channel TLV for the scan command. Continue to
601 * insert channel TLVs until:
602 * - the tlvidx hits the maximum configured per scan command
603 * - the next channel to insert is 0 (end of desired channel list)
604 * - doneearly is set (controlling individual scanning of 1,6,11)
605 */
606 while (tlvidx < maxchanperscan && ptmpchan->channumber
064827ed 607 && !doneearly && scanned < 2) {
876c9d3a 608
9012b28a 609 lbs_deb_scan(
876c9d3a
MT		 610 "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
611 ptmpchan->channumber, ptmpchan->radiotype,
612 ptmpchan->chanscanmode.passivescan,
613 ptmpchan->chanscanmode.disablechanfilt,
614 ptmpchan->maxscantime);
615
616 /* Copy the current channel TLV to the command being prepared */
617 memcpy(pchantlvout->chanscanparam + tlvidx,
618 ptmpchan, sizeof(pchantlvout->chanscanparam));
619
620 /* Increment the TLV header length by the size appended */
981f187b
DW		 621 /* Ew, it would be _so_ nice if we could just declare the
622 variable little-endian and let GCC handle it for us */
623 pchantlvout->header.len =
624 cpu_to_le16(le16_to_cpu(pchantlvout->header.len) +
625 sizeof(pchantlvout->chanscanparam));
876c9d3a
MT		 626
627 /*
628 * The tlv buffer length is set to the number of bytes of the
629 * between the channel tlv pointer and the start of the
630 * tlv buffer. This compensates for any TLVs that were appended
631 * before the channel list.
632 */
633 pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
634 - pscancfgout->tlvbuffer);
635
636 /* Add the size of the channel tlv header and the data length */
637 pscancfgout->tlvbufferlen +=
638 (sizeof(pchantlvout->header)
981f187b 639 + le16_to_cpu(pchantlvout->header.len));
876c9d3a
MT		 640
641 /* Increment the index to the channel tlv we are constructing */
642 tlvidx++;
643
644 doneearly = 0;
645
646 /* Stop the loop if the *current* channel is in the 1,6,11 set
647 * and we are not filtering on a BSSID or SSID.
648 */
649 if (!filteredscan && (ptmpchan->channumber == 1
650 || ptmpchan->channumber == 6
651 || ptmpchan->channumber == 11)) {
652 doneearly = 1;
653 }
654
655 /* Increment the tmp pointer to the next channel to be scanned */
656 ptmpchan++;
064827ed 657 scanned++;
876c9d3a
MT		 658
659 /* Stop the loop if the *next* channel is in the 1,6,11 set.
660 * This will cause it to be the only channel scanned on the next
661 * interation
662 */
663 if (!filteredscan && (ptmpchan->channumber == 1
664 || ptmpchan->channumber == 6
665 || ptmpchan->channumber == 11)) {
666 doneearly = 1;
667 }
668 }
669
670 /* Send the scan command to the firmware with the specified cfg */
671 ret = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
672 0, 0, pscancfgout);
2be92196 673 if (scanned >= 2 && !full_scan) {
9012b28a
HS		 674 ret = 0;
675 goto done;
064827ed 676 }
2be92196 677 scanned = 0;
876c9d3a
MT		 678 }
679
d9ad2f5d 680done:
064827ed
MT		 681 priv->adapter->last_scanned_channel = ptmpchan->channumber;
682
d9ad2f5d 683 /* Tell userspace the scan table has been updated */
064827ed 684 memset(&wrqu, 0, sizeof(union iwreq_data));
634b8f49 685 wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
064827ed 686
9012b28a 687 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
876c9d3a
MT		 688 return ret;
689}
690
eb8f7330
DW		 691static void
692clear_selected_scan_list_entries(wlan_adapter * adapter,
693 const struct wlan_ioctl_user_scan_cfg * scan_cfg)
694{
695 struct bss_descriptor * bss;
696 struct bss_descriptor * safe;
697 u32 clear_ssid_flag = 0, clear_bssid_flag = 0;
698
699 if (!scan_cfg)
700 return;
701
702 if (scan_cfg->clear_ssid && scan_cfg->ssid_len)
703 clear_ssid_flag = 1;
704
705 if (scan_cfg->clear_bssid
706 && (compare_ether_addr(scan_cfg->bssid, &zeromac[0]) != 0)
707 && (compare_ether_addr(scan_cfg->bssid, &bcastmac[0]) != 0)) {
708 clear_bssid_flag = 1;
709 }
710
711 if (!clear_ssid_flag && !clear_bssid_flag)
712 return;
713
714 mutex_lock(&adapter->lock);
715 list_for_each_entry_safe (bss, safe, &adapter->network_list, list) {
716 u32 clear = 0;
717
718 /* Check for an SSID match */
719 if ( clear_ssid_flag
d8efea25
DW		 720 && (bss->ssid_len == scan_cfg->ssid_len)
721 && !memcmp(bss->ssid, scan_cfg->ssid, bss->ssid_len))
eb8f7330
DW		 722 clear = 1;
723
724 /* Check for a BSSID match */
725 if ( clear_bssid_flag
726 && !compare_ether_addr(bss->bssid, scan_cfg->bssid))
727 clear = 1;
728
729 if (clear) {
730 list_move_tail (&bss->list, &adapter->network_free_list);
731 clear_bss_descriptor(bss);
732 }
733 }
734 mutex_unlock(&adapter->lock);
735}
736
737
876c9d3a
MT		 738/**
739 * @brief Internal function used to start a scan based on an input config
740 *
741 * Use the input user scan configuration information when provided in
742 * order to send the appropriate scan commands to firmware to populate or
743 * update the internal driver scan table
744 *
745 * @param priv A pointer to wlan_private structure
746 * @param puserscanin Pointer to the input configuration for the requested
747 * scan.
748 *
749 * @return 0 or < 0 if error
750 */
751int wlan_scan_networks(wlan_private * priv,
2be92196
MT		 752 const struct wlan_ioctl_user_scan_cfg * puserscanin,
753 int full_scan)
876c9d3a 754{
eb8f7330 755 wlan_adapter * adapter = priv->adapter;
876c9d3a
MT		 756 struct mrvlietypes_chanlistparamset *pchantlvout;
757 struct chanscanparamset * scan_chan_list = NULL;
758 struct wlan_scan_cmd_config * scan_cfg = NULL;
876c9d3a
MT		 759 u8 filteredscan;
760 u8 scancurrentchanonly;
761 int maxchanperscan;
762 int ret;
f8f55108
DW		 763#ifdef CONFIG_LIBERTAS_DEBUG
764 struct bss_descriptor * iter_bss;
765 int i = 0;
766#endif
876c9d3a 767
9012b28a 768 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a
MT		 769
770 scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
771 WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
772 if (scan_chan_list == NULL) {
773 ret = -ENOMEM;
774 goto out;
775 }
776
777 scan_cfg = wlan_scan_setup_scan_config(priv,
778 puserscanin,
779 &pchantlvout,
780 scan_chan_list,
781 &maxchanperscan,
782 &filteredscan,
783 &scancurrentchanonly);
784 if (scan_cfg == NULL) {
785 ret = -ENOMEM;
786 goto out;
787 }
788
eb8f7330 789 clear_selected_scan_list_entries(adapter, puserscanin);
876c9d3a
MT		 790
791 /* Keep the data path active if we are only scanning our current channel */
792 if (!scancurrentchanonly) {
634b8f49
HS		 793 netif_stop_queue(priv->dev);
794 netif_carrier_off(priv->dev);
51d84f50
JC		 795 netif_stop_queue(priv->mesh_dev);
796 netif_carrier_off(priv->mesh_dev);
876c9d3a
MT		 797 }
798
799 ret = wlan_scan_channel_list(priv,
800 maxchanperscan,
801 filteredscan,
802 scan_cfg,
803 pchantlvout,
064827ed 804 scan_chan_list,
2be92196
MT		 805 puserscanin,
806 full_scan);
876c9d3a 807
f8f55108
DW		 808#ifdef CONFIG_LIBERTAS_DEBUG
809 /* Dump the scan table */
810 mutex_lock(&adapter->lock);
811 list_for_each_entry (iter_bss, &adapter->network_list, list) {
812 lbs_deb_scan("Scan:(%02d) " MAC_FMT ", RSSI[%03d], SSID[%s]\n",
813 i++, MAC_ARG(iter_bss->bssid), (s32) iter_bss->rssi,
814 escape_essid(iter_bss->ssid, iter_bss->ssid_len));
815 }
816 mutex_unlock(&adapter->lock);
817#endif
876c9d3a
MT		 818
819 if (priv->adapter->connect_status == libertas_connected) {
634b8f49
HS		 820 netif_carrier_on(priv->dev);
821 netif_wake_queue(priv->dev);
51d84f50
JC		 822 netif_carrier_on(priv->mesh_dev);
823 netif_wake_queue(priv->mesh_dev);
876c9d3a
MT		 824 }
825
826out:
827 if (scan_cfg)
828 kfree(scan_cfg);
829
830 if (scan_chan_list)
831 kfree(scan_chan_list);
832
9012b28a 833 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
876c9d3a
MT		 834 return ret;
835}
836
837/**
838 * @brief Inspect the scan response buffer for pointers to expected TLVs
839 *
840 * TLVs can be included at the end of the scan response BSS information.
841 * Parse the data in the buffer for pointers to TLVs that can potentially
842 * be passed back in the response
843 *
844 * @param ptlv Pointer to the start of the TLV buffer to parse
845 * @param tlvbufsize size of the TLV buffer
846 * @param ptsftlv Output parameter: Pointer to the TSF TLV if found
847 *
848 * @return void
849 */
850static
851void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
852 int tlvbufsize,
853 struct mrvlietypes_tsftimestamp ** ptsftlv)
854{
855 struct mrvlietypes_data *pcurrenttlv;
856 int tlvbufleft;
857 u16 tlvtype;
858 u16 tlvlen;
859
860 pcurrenttlv = ptlv;
861 tlvbufleft = tlvbufsize;
862 *ptsftlv = NULL;
863
9012b28a 864 lbs_deb_scan("SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
876c9d3a
MT		 865 lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
866
867 while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
868 tlvtype = le16_to_cpu(pcurrenttlv->header.type);
869 tlvlen = le16_to_cpu(pcurrenttlv->header.len);
870
871 switch (tlvtype) {
872 case TLV_TYPE_TSFTIMESTAMP:
873 *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
874 break;
875
876 default:
9012b28a 877 lbs_deb_scan("SCAN_RESP: Unhandled TLV = %d\n",
876c9d3a
MT		 878 tlvtype);
879 /* Give up, this seems corrupted */
880 return;
881 } /* switch */
882
883 tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
884 pcurrenttlv =
885 (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
886 } /* while */
887}
888
889/**
890 * @brief Interpret a BSS scan response returned from the firmware
891 *
892 * Parse the various fixed fields and IEs passed back for a a BSS probe
893 * response or beacon from the scan command. Record information as needed
894 * in the scan table struct bss_descriptor for that entry.
895 *
fcdb53db 896 * @param bss Output parameter: Pointer to the BSS Entry
876c9d3a
MT		 897 *
898 * @return 0 or -1
899 */
fcdb53db
DW		 900static int libertas_process_bss(struct bss_descriptor * bss,
901 u8 ** pbeaconinfo, int *bytesleft)
876c9d3a
MT		 902{
903 enum ieeetypes_elementid elemID;
904 struct ieeetypes_fhparamset *pFH;
905 struct ieeetypes_dsparamset *pDS;
906 struct ieeetypes_cfparamset *pCF;
907 struct ieeetypes_ibssparamset *pibss;
876c9d3a
MT		 908 u8 *pcurrentptr;
909 u8 *pRate;
910 u8 elemlen;
911 u8 bytestocopy;
912 u8 ratesize;
913 u16 beaconsize;
914 u8 founddatarateie;
915 int bytesleftforcurrentbeacon;
9012b28a 916 int ret;
876c9d3a 917
876c9d3a
MT		 918 struct IE_WPA *pIe;
919 const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
920
921 struct ieeetypes_countryinfoset *pcountryinfo;
922
9012b28a 923 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a
MT		 924
925 founddatarateie = 0;
926 ratesize = 0;
927 beaconsize = 0;
928
929 if (*bytesleft >= sizeof(beaconsize)) {
930 /* Extract & convert beacon size from the command buffer */
981f187b 931 beaconsize = le16_to_cpup((void *)*pbeaconinfo);
876c9d3a
MT		 932 *bytesleft -= sizeof(beaconsize);
933 *pbeaconinfo += sizeof(beaconsize);
934 }
935
936 if (beaconsize == 0 || beaconsize > *bytesleft) {
937
938 *pbeaconinfo += *bytesleft;
939 *bytesleft = 0;
940
941 return -1;
942 }
943
944 /* Initialize the current working beacon pointer for this BSS iteration */
945 pcurrentptr = *pbeaconinfo;
946
947 /* Advance the return beacon pointer past the current beacon */
948 *pbeaconinfo += beaconsize;
949 *bytesleft -= beaconsize;
950
951 bytesleftforcurrentbeacon = beaconsize;
952
fcdb53db 953 memcpy(bss->bssid, pcurrentptr, ETH_ALEN);
02eb229b 954 lbs_deb_scan("process_bss: AP BSSID " MAC_FMT "\n", MAC_ARG(bss->bssid));
876c9d3a
MT		 955
956 pcurrentptr += ETH_ALEN;
957 bytesleftforcurrentbeacon -= ETH_ALEN;
958
959 if (bytesleftforcurrentbeacon < 12) {
fcdb53db 960 lbs_deb_scan("process_bss: Not enough bytes left\n");
876c9d3a
MT		 961 return -1;
962 }
963
964 /*
965 * next 4 fields are RSSI, time stamp, beacon interval,
966 * and capability information
967 */
968
969 /* RSSI is 1 byte long */
981f187b 970 bss->rssi = *pcurrentptr;
fcdb53db 971 lbs_deb_scan("process_bss: RSSI=%02X\n", *pcurrentptr);
876c9d3a
MT		 972 pcurrentptr += 1;
973 bytesleftforcurrentbeacon -= 1;
974
975 /* time stamp is 8 bytes long */
0c9ca690 976 bss->timestamp = le64_to_cpup((void *)pcurrentptr);
876c9d3a
MT		 977 pcurrentptr += 8;
978 bytesleftforcurrentbeacon -= 8;
979
980 /* beacon interval is 2 bytes long */
0c9ca690 981 bss->beaconperiod = le16_to_cpup((void *)pcurrentptr);
876c9d3a
MT		 982 pcurrentptr += 2;
983 bytesleftforcurrentbeacon -= 2;
984
985 /* capability information is 2 bytes long */
0c9ca690
DW		 986 bss->capability = le16_to_cpup((void *)pcurrentptr);
987 lbs_deb_scan("process_bss: capabilities = 0x%4X\n", bss->capability);
876c9d3a
MT		 988 pcurrentptr += 2;
989 bytesleftforcurrentbeacon -= 2;
990
0c9ca690
DW		 991 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
992 lbs_deb_scan("process_bss: AP WEP enabled\n");
993 if (bss->capability & WLAN_CAPABILITY_IBSS)
994 bss->mode = IW_MODE_ADHOC;
995 else
996 bss->mode = IW_MODE_INFRA;
997
876c9d3a 998 /* rest of the current buffer are IE's */
fcdb53db 999 lbs_deb_scan("process_bss: IE length for this AP = %d\n",
876c9d3a
MT		 1000 bytesleftforcurrentbeacon);
1001
fcdb53db 1002 lbs_dbg_hex("process_bss: IE info", (u8 *) pcurrentptr,
876c9d3a
MT		 1003 bytesleftforcurrentbeacon);
1004
876c9d3a
MT		 1005 /* process variable IE */
1006 while (bytesleftforcurrentbeacon >= 2) {
1007 elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
1008 elemlen = *((u8 *) pcurrentptr + 1);
1009
1010 if (bytesleftforcurrentbeacon < elemlen) {
fcdb53db 1011 lbs_deb_scan("process_bss: error in processing IE, "
876c9d3a
MT		 1012 "bytes left < IE length\n");
1013 bytesleftforcurrentbeacon = 0;
1014 continue;
1015 }
1016
1017 switch (elemID) {
876c9d3a 1018 case SSID:
d8efea25
DW		 1019 bss->ssid_len = elemlen;
1020 memcpy(bss->ssid, (pcurrentptr + 2), elemlen);
1021 lbs_deb_scan("ssid '%s', ssid length %u\n",
1022 escape_essid(bss->ssid, bss->ssid_len),
1023 bss->ssid_len);
876c9d3a
MT		 1024 break;
1025
1026 case SUPPORTED_RATES:
fcdb53db
DW		 1027 memcpy(bss->datarates, (pcurrentptr + 2), elemlen);
1028 memmove(bss->libertas_supported_rates, (pcurrentptr + 2),
876c9d3a
MT		 1029 elemlen);
1030 ratesize = elemlen;
1031 founddatarateie = 1;
1032 break;
1033
1034 case EXTRA_IE:
fcdb53db 1035 lbs_deb_scan("process_bss: EXTRA_IE Found!\n");
876c9d3a
MT		 1036 break;
1037
1038 case FH_PARAM_SET:
1039 pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
fcdb53db 1040 memmove(&bss->phyparamset.fhparamset, pFH,
876c9d3a 1041 sizeof(struct ieeetypes_fhparamset));
981f187b 1042#if 0 /* I think we can store these LE */
fcdb53db
DW		 1043 bss->phyparamset.fhparamset.dwelltime
1044 = le16_to_cpu(bss->phyparamset.fhparamset.dwelltime);
981f187b 1045#endif
876c9d3a
MT		 1046 break;
1047
1048 case DS_PARAM_SET:
1049 pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
fcdb53db
DW		 1050 bss->channel = pDS->currentchan;
1051 memcpy(&bss->phyparamset.dsparamset, pDS,
876c9d3a
MT		 1052 sizeof(struct ieeetypes_dsparamset));
1053 break;
1054
1055 case CF_PARAM_SET:
1056 pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
fcdb53db 1057 memcpy(&bss->ssparamset.cfparamset, pCF,
876c9d3a
MT		 1058 sizeof(struct ieeetypes_cfparamset));
1059 break;
1060
1061 case IBSS_PARAM_SET:
1062 pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
fcdb53db
DW		 1063 bss->atimwindow = le32_to_cpu(pibss->atimwindow);
1064 memmove(&bss->ssparamset.ibssparamset, pibss,
876c9d3a 1065 sizeof(struct ieeetypes_ibssparamset));
981f187b 1066#if 0
fcdb53db
DW		 1067 bss->ssparamset.ibssparamset.atimwindow
1068 = le16_to_cpu(bss->ssparamset.ibssparamset.atimwindow);
981f187b 1069#endif
876c9d3a
MT		 1070 break;
1071
1072 /* Handle Country Info IE */
1073 case COUNTRY_INFO:
fcdb53db
DW		 1074 pcountryinfo = (struct ieeetypes_countryinfoset *) pcurrentptr;
1075 if (pcountryinfo->len < sizeof(pcountryinfo->countrycode)
876c9d3a 1076 || pcountryinfo->len > 254) {
fcdb53db 1077 lbs_deb_scan("process_bss: 11D- Err "
4269e2ad 1078 "CountryInfo len =%d min=%zd max=254\n",
876c9d3a
MT		 1079 pcountryinfo->len,
1080 sizeof(pcountryinfo->countrycode));
9012b28a
HS		 1081 ret = -1;
1082 goto done;
876c9d3a
MT		 1083 }
1084
fcdb53db 1085 memcpy(&bss->countryinfo,
876c9d3a 1086 pcountryinfo, pcountryinfo->len + 2);
fcdb53db 1087 lbs_dbg_hex("process_bss: 11D- CountryInfo:",
876c9d3a
MT		 1088 (u8 *) pcountryinfo,
1089 (u32) (pcountryinfo->len + 2));
1090 break;
1091
1092 case EXTENDED_SUPPORTED_RATES:
1093 /*
1094 * only process extended supported rate
1095 * if data rate is already found.
1096 * data rate IE should come before
1097 * extended supported rate IE
1098 */
1099 if (founddatarateie) {
1100 if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
1101 bytestocopy =
1102 (WLAN_SUPPORTED_RATES - ratesize);
1103 } else {
1104 bytestocopy = elemlen;
1105 }
1106
fcdb53db 1107 pRate = (u8 *) bss->datarates;
876c9d3a
MT		 1108 pRate += ratesize;
1109 memmove(pRate, (pcurrentptr + 2), bytestocopy);
fcdb53db 1110 pRate = (u8 *) bss->libertas_supported_rates;
876c9d3a
MT		 1111 pRate += ratesize;
1112 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1113 }
1114 break;
1115
1116 case VENDOR_SPECIFIC_221:
1117#define IE_ID_LEN_FIELDS_BYTES 2
1118 pIe = (struct IE_WPA *)pcurrentptr;
1119
51b0c9d0
DW		 1120 if (memcmp(pIe->oui, oui01, sizeof(oui01)))
1121 break;
1122
fcdb53db
DW		 1123 bss->wpa_ie_len = min(elemlen + IE_ID_LEN_FIELDS_BYTES,
1124 MAX_WPA_IE_LEN);
1125 memcpy(bss->wpa_ie, pcurrentptr, bss->wpa_ie_len);
1126 lbs_dbg_hex("process_bss: WPA IE", bss->wpa_ie, elemlen);
876c9d3a
MT		 1127 break;
1128 case WPA2_IE:
1129 pIe = (struct IE_WPA *)pcurrentptr;
fcdb53db
DW		 1130 bss->rsn_ie_len = min(elemlen + IE_ID_LEN_FIELDS_BYTES,
1131 MAX_WPA_IE_LEN);
1132 memcpy(bss->rsn_ie, pcurrentptr, bss->rsn_ie_len);
1133 lbs_dbg_hex("process_bss: RSN_IE", bss->rsn_ie, elemlen);
876c9d3a
MT		 1134 break;
1135 case TIM:
1136 break;
1137
1138 case CHALLENGE_TEXT:
1139 break;
1140 }
1141
1142 pcurrentptr += elemlen + 2;
1143
1144 /* need to account for IE ID and IE len */
1145 bytesleftforcurrentbeacon -= (elemlen + 2);
1146
1147 } /* while (bytesleftforcurrentbeacon > 2) */
fcdb53db
DW		 1148
1149 /* Timestamp */
1150 bss->last_scanned = jiffies;
1151
9012b28a 1152 ret = 0;
876c9d3a 1153
9012b28a
HS		 1154done:
1155 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1156 return ret;
876c9d3a
MT		 1157}
1158
1159/**
1160 * @brief Compare two SSIDs
1161 *
1162 * @param ssid1 A pointer to ssid to compare
1163 * @param ssid2 A pointer to ssid to compare
1164 *
1165 * @return 0--ssid is same, otherwise is different
1166 */
717c9339 1167int libertas_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len)
876c9d3a 1168{
d8efea25 1169 if (ssid1_len != ssid2_len)
876c9d3a
MT		 1170 return -1;
1171
d8efea25 1172 return memcmp(ssid1, ssid2, ssid1_len);
876c9d3a
MT		 1173}
1174
1175/**
1176 * @brief This function finds a specific compatible BSSID in the scan list
1177 *
1178 * @param adapter A pointer to wlan_adapter
1179 * @param bssid BSSID to find in the scan list
1180 * @param mode Network mode: Infrastructure or IBSS
1181 *
1182 * @return index in BSSID list, or error return code (< 0)
1183 */
717c9339 1184struct bss_descriptor * libertas_find_bssid_in_list(wlan_adapter * adapter,
fcdb53db 1185 u8 * bssid, u8 mode)
876c9d3a 1186{
fcdb53db
DW		 1187 struct bss_descriptor * iter_bss;
1188 struct bss_descriptor * found_bss = NULL;
876c9d3a
MT		 1189
1190 if (!bssid)
fcdb53db 1191 return NULL;
876c9d3a 1192
fcdb53db
DW		 1193 lbs_dbg_hex("libertas_find_BSSID_in_list: looking for ",
1194 bssid, ETH_ALEN);
876c9d3a 1195
fcdb53db
DW		 1196 /* Look through the scan table for a compatible match. The loop will
1197 * continue past a matched bssid that is not compatible in case there
1198 * is an AP with multiple SSIDs assigned to the same BSSID
876c9d3a 1199 */
fcdb53db
DW		 1200 mutex_lock(&adapter->lock);
1201 list_for_each_entry (iter_bss, &adapter->network_list, list) {
3cf20931 1202 if (compare_ether_addr(iter_bss->bssid, bssid))
fcdb53db
DW		 1203 continue; /* bssid doesn't match */
1204 switch (mode) {
1205 case IW_MODE_INFRA:
1206 case IW_MODE_ADHOC:
1207 if (!is_network_compatible(adapter, iter_bss, mode))
876c9d3a 1208 break;
fcdb53db
DW		 1209 found_bss = iter_bss;
1210 break;
1211 default:
1212 found_bss = iter_bss;
1213 break;
876c9d3a
MT		 1214 }
1215 }
fcdb53db 1216 mutex_unlock(&adapter->lock);
876c9d3a 1217
fcdb53db 1218 return found_bss;
876c9d3a
MT		 1219}
1220
1221/**
1222 * @brief This function finds ssid in ssid list.
1223 *
1224 * @param adapter A pointer to wlan_adapter
1225 * @param ssid SSID to find in the list
1226 * @param bssid BSSID to qualify the SSID selection (if provided)
1227 * @param mode Network mode: Infrastructure or IBSS
1228 *
1229 * @return index in BSSID list
1230 */
717c9339 1231struct bss_descriptor * libertas_find_ssid_in_list(wlan_adapter * adapter,
d8efea25 1232 u8 *ssid, u8 ssid_len, u8 * bssid, u8 mode,
aeea0ab4 1233 int channel)
876c9d3a 1234{
876c9d3a 1235 u8 bestrssi = 0;
fcdb53db
DW		 1236 struct bss_descriptor * iter_bss = NULL;
1237 struct bss_descriptor * found_bss = NULL;
1238 struct bss_descriptor * tmp_oldest = NULL;
876c9d3a 1239
fcdb53db
DW		 1240 mutex_lock(&adapter->lock);
1241
1242 list_for_each_entry (iter_bss, &adapter->network_list, list) {
1243 if ( !tmp_oldest
1244 || (iter_bss->last_scanned < tmp_oldest->last_scanned))
1245 tmp_oldest = iter_bss;
1246
717c9339 1247 if (libertas_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len,
d8efea25 1248 ssid, ssid_len) != 0)
fcdb53db 1249 continue; /* ssid doesn't match */
3cf20931 1250 if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0)
fcdb53db 1251 continue; /* bssid doesn't match */
aeea0ab4
DW		 1252 if ((channel > 0) && (iter_bss->channel != channel))
1253 continue; /* channel doesn't match */
fcdb53db
DW		 1254
1255 switch (mode) {
1256 case IW_MODE_INFRA:
1257 case IW_MODE_ADHOC:
1258 if (!is_network_compatible(adapter, iter_bss, mode))
876c9d3a 1259 break;
fcdb53db
DW		 1260
1261 if (bssid) {
1262 /* Found requested BSSID */
1263 found_bss = iter_bss;
1264 goto out;
1265 }
1266
1267 if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
1268 bestrssi = SCAN_RSSI(iter_bss->rssi);
1269 found_bss = iter_bss;
1270 }
1271 break;
1272 case IW_MODE_AUTO:
1273 default:
1274 if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
1275 bestrssi = SCAN_RSSI(iter_bss->rssi);
1276 found_bss = iter_bss;
876c9d3a 1277 }
fcdb53db 1278 break;
876c9d3a
MT		 1279 }
1280 }
1281
fcdb53db
DW		 1282out:
1283 mutex_unlock(&adapter->lock);
1284 return found_bss;
876c9d3a
MT		 1285}
1286
1287/**
1288 * @brief This function finds the best SSID in the Scan List
1289 *
1290 * Search the scan table for the best SSID that also matches the current
1291 * adapter network preference (infrastructure or adhoc)
1292 *
1293 * @param adapter A pointer to wlan_adapter
1294 *
1295 * @return index in BSSID list
1296 */
717c9339 1297struct bss_descriptor * libertas_find_best_ssid_in_list(wlan_adapter * adapter,
fcdb53db 1298 u8 mode)
876c9d3a 1299{
876c9d3a 1300 u8 bestrssi = 0;
fcdb53db
DW		 1301 struct bss_descriptor * iter_bss;
1302 struct bss_descriptor * best_bss = NULL;
876c9d3a 1303
fcdb53db 1304 mutex_lock(&adapter->lock);
876c9d3a 1305
fcdb53db 1306 list_for_each_entry (iter_bss, &adapter->network_list, list) {
876c9d3a 1307 switch (mode) {
0dc5a290
DW		 1308 case IW_MODE_INFRA:
1309 case IW_MODE_ADHOC:
fcdb53db
DW		 1310 if (!is_network_compatible(adapter, iter_bss, mode))
1311 break;
1312 if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
1313 break;
1314 bestrssi = SCAN_RSSI(iter_bss->rssi);
1315 best_bss = iter_bss;
876c9d3a 1316 break;
0dc5a290 1317 case IW_MODE_AUTO:
876c9d3a 1318 default:
fcdb53db
DW		 1319 if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
1320 break;
1321 bestrssi = SCAN_RSSI(iter_bss->rssi);
1322 best_bss = iter_bss;
876c9d3a
MT		 1323 break;
1324 }
1325 }
1326
fcdb53db
DW		 1327 mutex_unlock(&adapter->lock);
1328 return best_bss;
876c9d3a
MT		 1329}
1330
1331/**
1332 * @brief Find the AP with specific ssid in the scan list
1333 *
1334 * @param priv A pointer to wlan_private structure
1335 * @param pSSID A pointer to AP's ssid
1336 *
1337 * @return 0--success, otherwise--fail
1338 */
717c9339 1339int libertas_find_best_network_ssid(wlan_private * priv,
d8efea25 1340 u8 *out_ssid, u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode)
876c9d3a
MT		 1341{
1342 wlan_adapter *adapter = priv->adapter;
fcdb53db
DW		 1343 int ret = -1;
1344 struct bss_descriptor * found;
876c9d3a 1345
9012b28a 1346 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a 1347
2be92196 1348 wlan_scan_networks(priv, NULL, 1);
876c9d3a
MT		 1349 if (adapter->surpriseremoved)
1350 return -1;
876c9d3a 1351
fcdb53db 1352 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
876c9d3a 1353
717c9339 1354 found = libertas_find_best_ssid_in_list(adapter, preferred_mode);
d8efea25
DW		 1355 if (found && (found->ssid_len > 0)) {
1356 memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE);
1357 *out_ssid_len = found->ssid_len;
fcdb53db
DW		 1358 *out_mode = found->mode;
1359 ret = 0;
876c9d3a
MT		 1360 }
1361
9012b28a 1362 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
876c9d3a
MT		 1363 return ret;
1364}
1365
1366/**
1367 * @brief Scan Network
1368 *
1369 * @param dev A pointer to net_device structure
1370 * @param info A pointer to iw_request_info structure
1371 * @param vwrq A pointer to iw_param structure
1372 * @param extra A pointer to extra data buf
1373 *
1374 * @return 0 --success, otherwise fail
1375 */
1376int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
1377 struct iw_param *vwrq, char *extra)
1378{
1379 wlan_private *priv = dev->priv;
1380 wlan_adapter *adapter = priv->adapter;
876c9d3a 1381
9012b28a 1382 lbs_deb_enter(LBS_DEB_SCAN);
876c9d3a 1383
2be92196 1384 wlan_scan_networks(priv, NULL, 0);
876c9d3a
MT		 1385
1386 if (adapter->surpriseremoved)
1387 return -1;
1388
9012b28a 1389 lbs_deb_leave(LBS_DEB_SCAN);
876c9d3a
MT		 1390 return 0;
1391}
1392
1393/**
1394 * @brief Send a scan command for all available channels filtered on a spec
1395 *
1396 * @param priv A pointer to wlan_private structure
1397 * @param prequestedssid A pointer to AP's ssid
1398 * @param keeppreviousscan Flag used to save/clear scan table before scan
1399 *
1400 * @return 0-success, otherwise fail
1401 */
717c9339 1402int libertas_send_specific_ssid_scan(wlan_private * priv,
d8efea25 1403 u8 *ssid, u8 ssid_len, u8 clear_ssid)
876c9d3a
MT		 1404{
1405 wlan_adapter *adapter = priv->adapter;
1406 struct wlan_ioctl_user_scan_cfg scancfg;
eb8f7330 1407 int ret = 0;
876c9d3a 1408
9012b28a 1409 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a 1410
d8efea25 1411 if (!ssid_len)
eb8f7330 1412 goto out;
876c9d3a
MT		 1413
1414 memset(&scancfg, 0x00, sizeof(scancfg));
d8efea25
DW		 1415 memcpy(scancfg.ssid, ssid, ssid_len);
1416 scancfg.ssid_len = ssid_len;
eb8f7330 1417 scancfg.clear_ssid = clear_ssid;
876c9d3a 1418
2be92196 1419 wlan_scan_networks(priv, &scancfg, 1);
876c9d3a
MT		 1420 if (adapter->surpriseremoved)
1421 return -1;
1422 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1423
eb8f7330 1424out:
9012b28a 1425 lbs_deb_leave(LBS_DEB_ASSOC);
eb8f7330 1426 return ret;
876c9d3a
MT		 1427}
1428
1429/**
1430 * @brief scan an AP with specific BSSID
1431 *
1432 * @param priv A pointer to wlan_private structure
1433 * @param bssid A pointer to AP's bssid
1434 * @param keeppreviousscan Flag used to save/clear scan table before scan
1435 *
1436 * @return 0-success, otherwise fail
1437 */
717c9339 1438int libertas_send_specific_bssid_scan(wlan_private * priv, u8 * bssid, u8 clear_bssid)
876c9d3a
MT		 1439{
1440 struct wlan_ioctl_user_scan_cfg scancfg;
1441
9012b28a 1442 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a 1443
eb8f7330
DW		 1444 if (bssid == NULL)
1445 goto out;
876c9d3a
MT		 1446
1447 memset(&scancfg, 0x00, sizeof(scancfg));
eb8f7330
DW		 1448 memcpy(scancfg.bssid, bssid, ETH_ALEN);
1449 scancfg.clear_bssid = clear_bssid;
876c9d3a 1450
2be92196 1451 wlan_scan_networks(priv, &scancfg, 1);
876c9d3a
MT		 1452 if (priv->adapter->surpriseremoved)
1453 return -1;
1454 wait_event_interruptible(priv->adapter->cmd_pending,
1455 !priv->adapter->nr_cmd_pending);
1456
eb8f7330 1457out:
9012b28a 1458 lbs_deb_leave(LBS_DEB_ASSOC);
876c9d3a
MT		 1459 return 0;
1460}
1461
fcdb53db
DW		 1462static inline char *libertas_translate_scan(wlan_private *priv,
1463 char *start, char *stop,
1464 struct bss_descriptor *bss)
876c9d3a 1465{
876c9d3a 1466 wlan_adapter *adapter = priv->adapter;
876c9d3a 1467 struct chan_freq_power *cfp;
876c9d3a
MT		 1468 char *current_val; /* For rates */
1469 struct iw_event iwe; /* Temporary buffer */
876c9d3a 1470 int j;
876c9d3a
MT		 1471#define PERFECT_RSSI ((u8)50)
1472#define WORST_RSSI ((u8)0)
1473#define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
1474 u8 rssi;
1475
fcdb53db
DW		 1476 cfp = libertas_find_cfp_by_band_and_channel(adapter, 0, bss->channel);
1477 if (!cfp) {
1478 lbs_deb_scan("Invalid channel number %d\n", bss->channel);
1479 return NULL;
2be92196 1480 }
876c9d3a 1481
fcdb53db
DW		 1482 /* First entry *MUST* be the AP BSSID */
1483 iwe.cmd = SIOCGIWAP;
1484 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1485 memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN);
1486 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN);
1487
1488 /* SSID */
1489 iwe.cmd = SIOCGIWESSID;
1490 iwe.u.data.flags = 1;
d8efea25
DW		 1491 iwe.u.data.length = min((u32) bss->ssid_len, (u32) IW_ESSID_MAX_SIZE);
1492 start = iwe_stream_add_point(start, stop, &iwe, bss->ssid);
fcdb53db
DW		 1493
1494 /* Mode */
1495 iwe.cmd = SIOCGIWMODE;
1496 iwe.u.mode = bss->mode;
1497 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN);
1498
1499 /* Frequency */
1500 iwe.cmd = SIOCGIWFREQ;
1501 iwe.u.freq.m = (long)cfp->freq * 100000;
1502 iwe.u.freq.e = 1;
1503 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN);
1504
1505 /* Add quality statistics */
1506 iwe.cmd = IWEVQUAL;
1507 iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
1508 iwe.u.qual.level = SCAN_RSSI(bss->rssi);
1509
1510 rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
1511 iwe.u.qual.qual =
1512 (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
1513 (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
1514 (RSSI_DIFF * RSSI_DIFF);
1515 if (iwe.u.qual.qual > 100)
1516 iwe.u.qual.qual = 100;
1517
1518 if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
1519 iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
1520 } else {
1521 iwe.u.qual.noise =
1522 CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
1523 }
80e78ef7
DW		 1524
1525 /* Locally created ad-hoc BSSs won't have beacons if this is the
1526 * only station in the adhoc network; so get signal strength
1527 * from receive statistics.
1528 */
1529 if ((adapter->mode == IW_MODE_ADHOC)
1530 && adapter->adhoccreate
717c9339 1531 && !libertas_ssid_cmp(adapter->curbssparams.ssid,
d8efea25
DW		 1532 adapter->curbssparams.ssid_len,
1533 bss->ssid, bss->ssid_len)) {
80e78ef7
DW		 1534 int snr, nf;
1535 snr = adapter->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
1536 nf = adapter->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
1537 iwe.u.qual.level = CAL_RSSI(snr, nf);
fcdb53db
DW		 1538 }
1539 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN);
876c9d3a 1540
fcdb53db
DW		 1541 /* Add encryption capability */
1542 iwe.cmd = SIOCGIWENCODE;
0c9ca690 1543 if (bss->capability & WLAN_CAPABILITY_PRIVACY) {
fcdb53db
DW		 1544 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1545 } else {
1546 iwe.u.data.flags = IW_ENCODE_DISABLED;
1547 }
1548 iwe.u.data.length = 0;
d8efea25 1549 start = iwe_stream_add_point(start, stop, &iwe, bss->ssid);
876c9d3a 1550
fcdb53db 1551 current_val = start + IW_EV_LCP_LEN;
876c9d3a 1552
fcdb53db
DW		 1553 iwe.cmd = SIOCGIWRATE;
1554 iwe.u.bitrate.fixed = 0;
1555 iwe.u.bitrate.disabled = 0;
1556 iwe.u.bitrate.value = 0;
876c9d3a 1557
fcdb53db
DW		 1558 for (j = 0; j < sizeof(bss->libertas_supported_rates); j++) {
1559 u8 rate = bss->libertas_supported_rates[j];
1560 if (rate == 0)
1561 break; /* no more rates */
1562 /* Bit rate given in 500 kb/s units (+ 0x80) */
1563 iwe.u.bitrate.value = (rate & 0x7f) * 500000;
1564 current_val = iwe_stream_add_value(start, current_val,
1565 stop, &iwe, IW_EV_PARAM_LEN);
1566 }
1567 if ((bss->mode == IW_MODE_ADHOC)
717c9339 1568 && !libertas_ssid_cmp(adapter->curbssparams.ssid,
d8efea25
DW		 1569 adapter->curbssparams.ssid_len,
1570 bss->ssid, bss->ssid_len)
fcdb53db
DW		 1571 && adapter->adhoccreate) {
1572 iwe.u.bitrate.value = 22 * 500000;
1573 current_val = iwe_stream_add_value(start, current_val,
1574 stop, &iwe, IW_EV_PARAM_LEN);
1575 }
1576 /* Check if we added any event */
1577 if((current_val - start) > IW_EV_LCP_LEN)
1578 start = current_val;
1579
1580 memset(&iwe, 0, sizeof(iwe));
1581 if (bss->wpa_ie_len) {
1582 char buf[MAX_WPA_IE_LEN];
1583 memcpy(buf, bss->wpa_ie, bss->wpa_ie_len);
1584 iwe.cmd = IWEVGENIE;
1585 iwe.u.data.length = bss->wpa_ie_len;
1586 start = iwe_stream_add_point(start, stop, &iwe, buf);
1587 }
876c9d3a 1588
fcdb53db
DW		 1589 memset(&iwe, 0, sizeof(iwe));
1590 if (bss->rsn_ie_len) {
1591 char buf[MAX_WPA_IE_LEN];
1592 memcpy(buf, bss->rsn_ie, bss->rsn_ie_len);
1593 iwe.cmd = IWEVGENIE;
1594 iwe.u.data.length = bss->rsn_ie_len;
1595 start = iwe_stream_add_point(start, stop, &iwe, buf);
1596 }
876c9d3a 1597
fcdb53db
DW		 1598 return start;
1599}
876c9d3a 1600
fcdb53db
DW		 1601/**
1602 * @brief Retrieve the scan table entries via wireless tools IOCTL call
1603 *
1604 * @param dev A pointer to net_device structure
1605 * @param info A pointer to iw_request_info structure
1606 * @param dwrq A pointer to iw_point structure
1607 * @param extra A pointer to extra data buf
1608 *
1609 * @return 0 --success, otherwise fail
1610 */
1611int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
1612 struct iw_point *dwrq, char *extra)
1613{
1614#define SCAN_ITEM_SIZE 128
1615 wlan_private *priv = dev->priv;
1616 wlan_adapter *adapter = priv->adapter;
1617 int err = 0;
1618 char *ev = extra;
1619 char *stop = ev + dwrq->length;
1620 struct bss_descriptor * iter_bss;
1621 struct bss_descriptor * safe;
876c9d3a 1622
fcdb53db 1623 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a 1624
fcdb53db
DW		 1625 /* If we've got an uncompleted scan, schedule the next part */
1626 if (!adapter->nr_cmd_pending && adapter->last_scanned_channel)
1627 wlan_scan_networks(priv, NULL, 0);
876c9d3a 1628
80e78ef7 1629 /* Update RSSI if current BSS is a locally created ad-hoc BSS */
aeea0ab4 1630 if ((adapter->mode == IW_MODE_ADHOC) && adapter->adhoccreate) {
80e78ef7
DW		 1631 libertas_prepare_and_send_command(priv, cmd_802_11_rssi, 0,
1632 cmd_option_waitforrsp, 0, NULL);
1633 }
1634
fcdb53db
DW		 1635 mutex_lock(&adapter->lock);
1636 list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) {
1637 char * next_ev;
1638 unsigned long stale_time;
876c9d3a 1639
fcdb53db
DW		 1640 if (stop - ev < SCAN_ITEM_SIZE) {
1641 err = -E2BIG;
1642 break;
876c9d3a 1643 }
876c9d3a 1644
fcdb53db
DW		 1645 /* Prune old an old scan result */
1646 stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
1647 if (time_after(jiffies, stale_time)) {
1648 list_move_tail (&iter_bss->list,
1649 &adapter->network_free_list);
1650 clear_bss_descriptor(iter_bss);
1651 continue;
876c9d3a
MT		 1652 }
1653
fcdb53db
DW		 1654 /* Translate to WE format this entry */
1655 next_ev = libertas_translate_scan(priv, ev, stop, iter_bss);
1656 if (next_ev == NULL)
1657 continue;
1658 ev = next_ev;
876c9d3a 1659 }
fcdb53db 1660 mutex_unlock(&adapter->lock);
876c9d3a 1661
fcdb53db 1662 dwrq->length = (ev - extra);
876c9d3a
MT		 1663 dwrq->flags = 0;
1664
9012b28a 1665 lbs_deb_leave(LBS_DEB_ASSOC);
fcdb53db 1666 return err;
876c9d3a
MT		 1667}
1668
1669/**
1670 * @brief Prepare a scan command to be sent to the firmware
1671 *
1672 * Use the wlan_scan_cmd_config sent to the command processing module in
1673 * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1674 * struct to send to firmware.
1675 *
1676 * The fixed fields specifying the BSS type and BSSID filters as well as a
1677 * variable number/length of TLVs are sent in the command to firmware.
1678 *
1679 * @param priv A pointer to wlan_private structure
1680 * @param cmd A pointer to cmd_ds_command structure to be sent to
1681 * firmware with the cmd_DS_801_11_SCAN structure
1682 * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used
1683 * to set the fields/TLVs for the command sent to firmware
1684 *
1685 * @return 0 or -1
1686 *
1687 * @sa wlan_scan_create_channel_list
1688 */
1689int libertas_cmd_80211_scan(wlan_private * priv,
1690 struct cmd_ds_command *cmd, void *pdata_buf)
1691{
1692 struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
1693 struct wlan_scan_cmd_config *pscancfg;
1694
9012b28a 1695 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a
MT		 1696
1697 pscancfg = pdata_buf;
1698
1699 /* Set fixed field variables in scan command */
1700 pscan->bsstype = pscancfg->bsstype;
eb8f7330 1701 memcpy(pscan->BSSID, pscancfg->bssid, sizeof(pscan->BSSID));
876c9d3a
MT		 1702 memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
1703
1704 cmd->command = cpu_to_le16(cmd_802_11_scan);
1705
1706 /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1707 cmd->size = cpu_to_le16(sizeof(pscan->bsstype)
1708 + sizeof(pscan->BSSID)
1709 + pscancfg->tlvbufferlen + S_DS_GEN);
1710
9012b28a 1711 lbs_deb_scan("SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
981f187b
DW		 1712 le16_to_cpu(cmd->command), le16_to_cpu(cmd->size),
1713 le16_to_cpu(cmd->seqnum));
9012b28a
HS		 1714
1715 lbs_deb_leave(LBS_DEB_ASSOC);
876c9d3a
MT		 1716 return 0;
1717}
1718
fcdb53db
DW		 1719static inline int is_same_network(struct bss_descriptor *src,
1720 struct bss_descriptor *dst)
1721{
1722 /* A network is only a duplicate if the channel, BSSID, and ESSID
1723 * all match. We treat all <hidden> with the same BSSID and channel
1724 * as one network */
d8efea25 1725 return ((src->ssid_len == dst->ssid_len) &&
fcdb53db
DW		 1726 (src->channel == dst->channel) &&
1727 !compare_ether_addr(src->bssid, dst->bssid) &&
d8efea25 1728 !memcmp(src->ssid, dst->ssid, src->ssid_len));
fcdb53db
DW		 1729}
1730
876c9d3a
MT		 1731/**
1732 * @brief This function handles the command response of scan
1733 *
1734 * The response buffer for the scan command has the following
1735 * memory layout:
1736 *
1737 * .-----------------------------------------------------------.
1738 * | header (4 * sizeof(u16)): Standard command response hdr |
1739 * .-----------------------------------------------------------.
1740 * | bufsize (u16) : sizeof the BSS Description data |
1741 * .-----------------------------------------------------------.
1742 * | NumOfSet (u8) : Number of BSS Descs returned |
1743 * .-----------------------------------------------------------.
1744 * | BSSDescription data (variable, size given in bufsize) |
1745 * .-----------------------------------------------------------.
1746 * | TLV data (variable, size calculated using header->size, |
1747 * | bufsize and sizeof the fixed fields above) |
1748 * .-----------------------------------------------------------.
1749 *
1750 * @param priv A pointer to wlan_private structure
1751 * @param resp A pointer to cmd_ds_command
1752 *
1753 * @return 0 or -1
1754 */
1755int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
1756{
1757 wlan_adapter *adapter = priv->adapter;
1758 struct cmd_ds_802_11_scan_rsp *pscan;
876c9d3a
MT		 1759 struct mrvlietypes_data *ptlv;
1760 struct mrvlietypes_tsftimestamp *ptsftlv;
fcdb53db
DW		 1761 struct bss_descriptor * iter_bss;
1762 struct bss_descriptor * safe;
876c9d3a
MT		 1763 u8 *pbssinfo;
1764 u16 scanrespsize;
1765 int bytesleft;
876c9d3a
MT		 1766 int idx;
1767 int tlvbufsize;
9012b28a 1768 int ret;
876c9d3a 1769
9012b28a 1770 lbs_deb_enter(LBS_DEB_ASSOC);
876c9d3a 1771
fcdb53db
DW		 1772 /* Prune old entries from scan table */
1773 list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) {
1774 unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
1775 if (time_before(jiffies, stale_time))
1776 continue;
1777 list_move_tail (&iter_bss->list, &adapter->network_free_list);
1778 clear_bss_descriptor(iter_bss);
1779 }
1780
876c9d3a
MT		 1781 pscan = &resp->params.scanresp;
1782
fcdb53db
DW		 1783 if (pscan->nr_sets > MAX_NETWORK_COUNT) {
1784 lbs_deb_scan(
1785 "SCAN_RESP: too many scan results (%d, max %d)!!\n",
1786 pscan->nr_sets, MAX_NETWORK_COUNT);
9012b28a
HS		 1787 ret = -1;
1788 goto done;
876c9d3a
MT		 1789 }
1790
1791 bytesleft = le16_to_cpu(pscan->bssdescriptsize);
9012b28a 1792 lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft);
876c9d3a
MT		 1793
1794 scanrespsize = le16_to_cpu(resp->size);
9012b28a 1795 lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n",
876c9d3a
MT		 1796 pscan->nr_sets);
1797
876c9d3a
MT		 1798 pbssinfo = pscan->bssdesc_and_tlvbuffer;
1799
1800 /* The size of the TLV buffer is equal to the entire command response
1801 * size (scanrespsize) minus the fixed fields (sizeof()'s), the
1802 * BSS Descriptions (bssdescriptsize as bytesLef) and the command
1803 * response header (S_DS_GEN)
1804 */
1805 tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
1806 + sizeof(pscan->nr_sets)
1807 + S_DS_GEN);
1808
1809 ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
1810
1811 /* Search the TLV buffer space in the scan response for any valid TLVs */
1812 wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
1813
1814 /*
1815 * Process each scan response returned (pscan->nr_sets). Save
1816 * the information in the newbssentry and then insert into the
1817 * driver scan table either as an update to an existing entry
1818 * or as an addition at the end of the table
1819 */
1820 for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
fcdb53db
DW		 1821 struct bss_descriptor new;
1822 struct bss_descriptor * found = NULL;
fcdb53db 1823 struct bss_descriptor * oldest = NULL;
876c9d3a
MT		 1824
1825 /* Process the data fields and IEs returned for this BSS */
fcdb53db
DW		 1826 memset(&new, 0, sizeof (struct bss_descriptor));
1827 if (libertas_process_bss(&new, &pbssinfo, &bytesleft) != 0) {
1828 /* error parsing the scan response, skipped */
1829 lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n");
1830 continue;
1831 }
876c9d3a 1832
fcdb53db
DW		 1833 /* Try to find this bss in the scan table */
1834 list_for_each_entry (iter_bss, &adapter->network_list, list) {
1835 if (is_same_network(iter_bss, &new)) {
1836 found = iter_bss;
1837 break;
876c9d3a
MT		 1838 }
1839
fcdb53db
DW		 1840 if ((oldest == NULL) ||
1841 (iter_bss->last_scanned < oldest->last_scanned))
1842 oldest = iter_bss;
1843 }
876c9d3a 1844
fcdb53db
DW		 1845 if (found) {
1846 /* found, clear it */
1847 clear_bss_descriptor(found);
1848 } else if (!list_empty(&adapter->network_free_list)) {
1849 /* Pull one from the free list */
1850 found = list_entry(adapter->network_free_list.next,
1851 struct bss_descriptor, list);
1852 list_move_tail(&found->list, &adapter->network_list);
1853 } else if (oldest) {
1854 /* If there are no more slots, expire the oldest */
1855 found = oldest;
1856 clear_bss_descriptor(found);
1857 list_move_tail(&found->list, &adapter->network_list);
876c9d3a 1858 } else {
fcdb53db
DW		 1859 continue;
1860 }
876c9d3a 1861
fcdb53db
DW		 1862 lbs_deb_scan("SCAN_RESP: BSSID = " MAC_FMT "\n",
1863 new.bssid[0], new.bssid[1], new.bssid[2],
1864 new.bssid[3], new.bssid[4], new.bssid[5]);
1865
1866 /*
1867 * If the TSF TLV was appended to the scan results, save the
1868 * this entries TSF value in the networktsf field. The
1869 * networktsf is the firmware's TSF value at the time the
1870 * beacon or probe response was received.
1871 */
1872 if (ptsftlv) {
981f187b 1873 new.networktsf = le64_to_cpup(&ptsftlv->tsftable[idx]);
876c9d3a 1874 }
876c9d3a 1875
fcdb53db
DW		 1876 /* Copy the locally created newbssentry to the scan table */
1877 memcpy(found, &new, offsetof(struct bss_descriptor, list));
1878 }
876c9d3a 1879
9012b28a 1880 ret = 0;
876c9d3a 1881
9012b28a
HS		 1882done:
1883 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1884 return ret;
876c9d3a 1885}
kernel source for telekom puls (alcatel/mediatek)