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path: root/drivers/net/wireless/libertas/scan.c
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-rw-r--r--drivers/net/wireless/libertas/scan.c2044
1 files changed, 2044 insertions, 0 deletions
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
new file mode 100644
index 000000000000..e18706238951
--- /dev/null
+++ b/drivers/net/wireless/libertas/scan.c
@@ -0,0 +1,2044 @@
1/* -*- mode: C; tab-width: 4; indent-tabs-mode: nil -*- */
2/* vi: set expandtab shiftwidth=4 tabstop=4 textwidth=78: */
3
4/**
5 * Functions implementing wlan scan IOCTL and firmware command APIs
6 *
7 * IOCTL handlers as well as command preperation and response routines
8 * for sending scan commands to the firmware.
9 */
10#include <linux/ctype.h>
11#include <linux/if.h>
12#include <linux/netdevice.h>
13#include <linux/wireless.h>
14
15#include <net/ieee80211.h>
16#include <net/iw_handler.h>
17
18#include "host.h"
19#include "decl.h"
20#include "dev.h"
21#include "scan.h"
22
23//! Approximate amount of data needed to pass a scan result back to iwlist
24#define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
25 + IW_ESSID_MAX_SIZE \
26 + IW_EV_UINT_LEN \
27 + IW_EV_FREQ_LEN \
28 + IW_EV_QUAL_LEN \
29 + IW_ESSID_MAX_SIZE \
30 + IW_EV_PARAM_LEN \
31 + 40) /* 40 for WPAIE */
32
33//! Memory needed to store a max sized channel List TLV for a firmware scan
34#define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
35 + (MRVDRV_MAX_CHANNELS_PER_SCAN \
36 * sizeof(struct chanscanparamset)))
37
38//! Memory needed to store a max number/size SSID TLV for a firmware scan
39#define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
40
41//! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
42#define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \
43 + sizeof(struct mrvlietypes_numprobes) \
44 + CHAN_TLV_MAX_SIZE \
45 + SSID_TLV_MAX_SIZE)
46
47//! The maximum number of channels the firmware can scan per command
48#define MRVDRV_MAX_CHANNELS_PER_SCAN 14
49
50/**
51 * @brief Number of channels to scan per firmware scan command issuance.
52 *
53 * Number restricted to prevent hitting the limit on the amount of scan data
54 * returned in a single firmware scan command.
55 */
56#define MRVDRV_CHANNELS_PER_SCAN_CMD 4
57
58//! Scan time specified in the channel TLV for each channel for passive scans
59#define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
60
61//! Scan time specified in the channel TLV for each channel for active scans
62#define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
63
64//! Macro to enable/disable SSID checking before storing a scan table
65#ifdef DISCARD_BAD_SSID
66#define CHECK_SSID_IS_VALID(x) ssid_valid(&bssidEntry.ssid)
67#else
68#define CHECK_SSID_IS_VALID(x) 1
69#endif
70
71/**
72 * @brief Check if a scanned network compatible with the driver settings
73 *
74 * WEP WPA WPA2 ad-hoc encrypt Network
75 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
76 * 0 0 0 0 NONE 0 0 0 yes No security
77 * 1 0 0 0 NONE 1 0 0 yes Static WEP
78 * 0 1 0 0 x 1x 1 x yes WPA
79 * 0 0 1 0 x 1x x 1 yes WPA2
80 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
81 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
82 *
83 *
84 * @param adapter A pointer to wlan_adapter
85 * @param index Index in scantable to check against current driver settings
86 * @param mode Network mode: Infrastructure or IBSS
87 *
88 * @return Index in scantable, or error code if negative
89 */
90static int is_network_compatible(wlan_adapter * adapter, int index, int mode)
91{
92 ENTER();
93
94 if (adapter->scantable[index].inframode == mode) {
95 if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
96 && !adapter->secinfo.WPAenabled
97 && !adapter->secinfo.WPA2enabled
98 && adapter->scantable[index].wpa_supplicant.wpa_ie[0] !=
99 WPA_IE
100 && adapter->scantable[index].wpa2_supplicant.wpa_ie[0] !=
101 WPA2_IE && adapter->secinfo.Encryptionmode == CIPHER_NONE
102 && !adapter->scantable[index].privacy) {
103 /* no security */
104 LEAVE();
105 return index;
106 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPenabled
107 && !adapter->secinfo.WPAenabled
108 && !adapter->secinfo.WPA2enabled
109 && adapter->scantable[index].privacy) {
110 /* static WEP enabled */
111 LEAVE();
112 return index;
113 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
114 && adapter->secinfo.WPAenabled
115 && !adapter->secinfo.WPA2enabled
116 && (adapter->scantable[index].wpa_supplicant.
117 wpa_ie[0]
118 == WPA_IE)
119 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
120 && adapter->scantable[index].privacy */
121 ) {
122 /* WPA enabled */
123 lbs_pr_debug(1,
124 "is_network_compatible() WPA: index=%d wpa_ie=%#x "
125 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
126 "privacy=%#x\n", index,
127 adapter->scantable[index].wpa_supplicant.
128 wpa_ie[0],
129 adapter->scantable[index].wpa2_supplicant.
130 wpa_ie[0],
131 (adapter->secinfo.WEPstatus ==
132 wlan802_11WEPenabled) ? "e" : "d",
133 (adapter->secinfo.WPAenabled) ? "e" : "d",
134 (adapter->secinfo.WPA2enabled) ? "e" : "d",
135 adapter->secinfo.Encryptionmode,
136 adapter->scantable[index].privacy);
137 LEAVE();
138 return index;
139 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
140 && !adapter->secinfo.WPAenabled
141 && adapter->secinfo.WPA2enabled
142 && (adapter->scantable[index].wpa2_supplicant.
143 wpa_ie[0]
144 == WPA2_IE)
145 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
146 && adapter->scantable[index].privacy */
147 ) {
148 /* WPA2 enabled */
149 lbs_pr_debug(1,
150 "is_network_compatible() WPA2: index=%d wpa_ie=%#x "
151 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
152 "privacy=%#x\n", index,
153 adapter->scantable[index].wpa_supplicant.
154 wpa_ie[0],
155 adapter->scantable[index].wpa2_supplicant.
156 wpa_ie[0],
157 (adapter->secinfo.WEPstatus ==
158 wlan802_11WEPenabled) ? "e" : "d",
159 (adapter->secinfo.WPAenabled) ? "e" : "d",
160 (adapter->secinfo.WPA2enabled) ? "e" : "d",
161 adapter->secinfo.Encryptionmode,
162 adapter->scantable[index].privacy);
163 LEAVE();
164 return index;
165 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
166 && !adapter->secinfo.WPAenabled
167 && !adapter->secinfo.WPA2enabled
168 && (adapter->scantable[index].wpa_supplicant.
169 wpa_ie[0]
170 != WPA_IE)
171 && (adapter->scantable[index].wpa2_supplicant.
172 wpa_ie[0]
173 != WPA2_IE)
174 && adapter->secinfo.Encryptionmode != CIPHER_NONE
175 && adapter->scantable[index].privacy) {
176 /* dynamic WEP enabled */
177 lbs_pr_debug(1,
178 "is_network_compatible() dynamic WEP: index=%d "
179 "wpa_ie=%#x wpa2_ie=%#x Encmode=%#x privacy=%#x\n",
180 index,
181 adapter->scantable[index].wpa_supplicant.
182 wpa_ie[0],
183 adapter->scantable[index].wpa2_supplicant.
184 wpa_ie[0], adapter->secinfo.Encryptionmode,
185 adapter->scantable[index].privacy);
186 LEAVE();
187 return index;
188 }
189
190 /* security doesn't match */
191 lbs_pr_debug(1,
192 "is_network_compatible() FAILED: index=%d wpa_ie=%#x "
193 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x privacy=%#x\n",
194 index,
195 adapter->scantable[index].wpa_supplicant.wpa_ie[0],
196 adapter->scantable[index].wpa2_supplicant.wpa_ie[0],
197 (adapter->secinfo.WEPstatus ==
198 wlan802_11WEPenabled) ? "e" : "d",
199 (adapter->secinfo.WPAenabled) ? "e" : "d",
200 (adapter->secinfo.WPA2enabled) ? "e" : "d",
201 adapter->secinfo.Encryptionmode,
202 adapter->scantable[index].privacy);
203 LEAVE();
204 return -ECONNREFUSED;
205 }
206
207 /* mode doesn't match */
208 LEAVE();
209 return -ENETUNREACH;
210}
211
212/**
213 * @brief This function validates a SSID as being able to be printed
214 *
215 * @param pssid SSID structure to validate
216 *
217 * @return TRUE or FALSE
218 */
219static u8 ssid_valid(struct WLAN_802_11_SSID *pssid)
220{
221 int ssididx;
222
223 for (ssididx = 0; ssididx < pssid->ssidlength; ssididx++) {
224 if (!isprint(pssid->ssid[ssididx])) {
225 return 0;
226 }
227 }
228
229 return 1;
230}
231
232/**
233 * @brief Post process the scan table after a new scan command has completed
234 *
235 * Inspect each entry of the scan table and try to find an entry that
236 * matches our current associated/joined network from the scan. If
237 * one is found, update the stored copy of the bssdescriptor for our
238 * current network.
239 *
240 * Debug dump the current scan table contents if compiled accordingly.
241 *
242 * @param priv A pointer to wlan_private structure
243 *
244 * @return void
245 */
246static void wlan_scan_process_results(wlan_private * priv)
247{
248 wlan_adapter *adapter = priv->adapter;
249 int foundcurrent;
250 int i;
251
252 foundcurrent = 0;
253
254 if (adapter->connect_status == libertas_connected) {
255 /* try to find the current BSSID in the new scan list */
256 for (i = 0; i < adapter->numinscantable; i++) {
257 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid,
258 &adapter->curbssparams.ssid) &&
259 !memcmp(adapter->curbssparams.bssid,
260 adapter->scantable[i].macaddress,
261 ETH_ALEN)) {
262 foundcurrent = 1;
263 }
264 }
265
266 if (foundcurrent) {
267 /* Make a copy of current BSSID descriptor */
268 memcpy(&adapter->curbssparams.bssdescriptor,
269 &adapter->scantable[i],
270 sizeof(adapter->curbssparams.bssdescriptor));
271 }
272 }
273
274 for (i = 0; i < adapter->numinscantable; i++) {
275 lbs_pr_debug(1, "Scan:(%02d) %02x:%02x:%02x:%02x:%02x:%02x, "
276 "RSSI[%03d], SSID[%s]\n",
277 i,
278 adapter->scantable[i].macaddress[0],
279 adapter->scantable[i].macaddress[1],
280 adapter->scantable[i].macaddress[2],
281 adapter->scantable[i].macaddress[3],
282 adapter->scantable[i].macaddress[4],
283 adapter->scantable[i].macaddress[5],
284 (s32) adapter->scantable[i].rssi,
285 adapter->scantable[i].ssid.ssid);
286 }
287}
288
289/**
290 * @brief Create a channel list for the driver to scan based on region info
291 *
292 * Use the driver region/band information to construct a comprehensive list
293 * of channels to scan. This routine is used for any scan that is not
294 * provided a specific channel list to scan.
295 *
296 * @param priv A pointer to wlan_private structure
297 * @param scanchanlist Output parameter: resulting channel list to scan
298 * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
299 * is being sent in the command to firmware. Used to
300 * increase the number of channels sent in a scan
301 * command and to disable the firmware channel scan
302 * filter.
303 *
304 * @return void
305 */
306static void wlan_scan_create_channel_list(wlan_private * priv,
307 struct chanscanparamset * scanchanlist,
308 u8 filteredscan)
309{
310
311 wlan_adapter *adapter = priv->adapter;
312 struct region_channel *scanregion;
313 struct chan_freq_power *cfp;
314 int rgnidx;
315 int chanidx;
316 int nextchan;
317 u8 scantype;
318
319 chanidx = 0;
320
321 /* Set the default scan type to the user specified type, will later
322 * be changed to passive on a per channel basis if restricted by
323 * regulatory requirements (11d or 11h)
324 */
325 scantype = adapter->scantype;
326
327 for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
328 if (priv->adapter->enable11d &&
329 adapter->connect_status != libertas_connected) {
330 /* Scan all the supported chan for the first scan */
331 if (!adapter->universal_channel[rgnidx].valid)
332 continue;
333 scanregion = &adapter->universal_channel[rgnidx];
334
335 /* clear the parsed_region_chan for the first scan */
336 memset(&adapter->parsed_region_chan, 0x00,
337 sizeof(adapter->parsed_region_chan));
338 } else {
339 if (!adapter->region_channel[rgnidx].valid)
340 continue;
341 scanregion = &adapter->region_channel[rgnidx];
342 }
343
344 for (nextchan = 0;
345 nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
346
347 cfp = scanregion->CFP + nextchan;
348
349 if (priv->adapter->enable11d) {
350 scantype =
351 libertas_get_scan_type_11d(cfp->channel,
352 &adapter->
353 parsed_region_chan);
354 }
355
356 switch (scanregion->band) {
357 case BAND_B:
358 case BAND_G:
359 default:
360 scanchanlist[chanidx].radiotype =
361 cmd_scan_radio_type_bg;
362 break;
363 }
364
365 if (scantype == cmd_scan_type_passive) {
366 scanchanlist[chanidx].maxscantime =
367 cpu_to_le16
368 (MRVDRV_PASSIVE_SCAN_CHAN_TIME);
369 scanchanlist[chanidx].chanscanmode.passivescan =
370 1;
371 } else {
372 scanchanlist[chanidx].maxscantime =
373 cpu_to_le16
374 (MRVDRV_ACTIVE_SCAN_CHAN_TIME);
375 scanchanlist[chanidx].chanscanmode.passivescan =
376 0;
377 }
378
379 scanchanlist[chanidx].channumber = cfp->channel;
380
381 if (filteredscan) {
382 scanchanlist[chanidx].chanscanmode.
383 disablechanfilt = 1;
384 }
385 }
386 }
387}
388
389/**
390 * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
391 *
392 * Application layer or other functions can invoke wlan_scan_networks
393 * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
394 * This structure is used as the basis of one or many wlan_scan_cmd_config
395 * commands that are sent to the command processing module and sent to
396 * firmware.
397 *
398 * Create a wlan_scan_cmd_config based on the following user supplied
399 * parameters (if present):
400 * - SSID filter
401 * - BSSID filter
402 * - Number of Probes to be sent
403 * - channel list
404 *
405 * If the SSID or BSSID filter is not present, disable/clear the filter.
406 * If the number of probes is not set, use the adapter default setting
407 * Qualify the channel
408 *
409 * @param priv A pointer to wlan_private structure
410 * @param puserscanin NULL or pointer to scan configuration parameters
411 * @param ppchantlvout Output parameter: Pointer to the start of the
412 * channel TLV portion of the output scan config
413 * @param pscanchanlist Output parameter: Pointer to the resulting channel
414 * list to scan
415 * @param pmaxchanperscan Output parameter: Number of channels to scan for
416 * each issuance of the firmware scan command
417 * @param pfilteredscan Output parameter: Flag indicating whether or not
418 * a BSSID or SSID filter is being sent in the
419 * command to firmware. Used to increase the number
420 * of channels sent in a scan command and to
421 * disable the firmware channel scan filter.
422 * @param pscancurrentonly Output parameter: Flag indicating whether or not
423 * we are only scanning our current active channel
424 *
425 * @return resulting scan configuration
426 */
427static struct wlan_scan_cmd_config *
428wlan_scan_setup_scan_config(wlan_private * priv,
429 const struct wlan_ioctl_user_scan_cfg * puserscanin,
430 struct mrvlietypes_chanlistparamset ** ppchantlvout,
431 struct chanscanparamset * pscanchanlist,
432 int *pmaxchanperscan,
433 u8 * pfilteredscan,
434 u8 * pscancurrentonly)
435{
436 wlan_adapter *adapter = priv->adapter;
437 const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
438 struct mrvlietypes_numprobes *pnumprobestlv;
439 struct mrvlietypes_ssidparamset *pssidtlv;
440 struct wlan_scan_cmd_config * pscancfgout = NULL;
441 u8 *ptlvpos;
442 u16 numprobes;
443 u16 ssidlen;
444 int chanidx;
445 int scantype;
446 int scandur;
447 int channel;
448 int radiotype;
449
450 pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
451 if (pscancfgout == NULL)
452 goto out;
453
454 /* The tlvbufferlen is calculated for each scan command. The TLVs added
455 * in this routine will be preserved since the routine that sends
456 * the command will append channelTLVs at *ppchantlvout. The difference
457 * between the *ppchantlvout and the tlvbuffer start will be used
458 * to calculate the size of anything we add in this routine.
459 */
460 pscancfgout->tlvbufferlen = 0;
461
462 /* Running tlv pointer. Assigned to ppchantlvout at end of function
463 * so later routines know where channels can be added to the command buf
464 */
465 ptlvpos = pscancfgout->tlvbuffer;
466
467 /*
468 * Set the initial scan paramters for progressive scanning. If a specific
469 * BSSID or SSID is used, the number of channels in the scan command
470 * will be increased to the absolute maximum
471 */
472 *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
473
474 /* Initialize the scan as un-filtered by firmware, set to TRUE below if
475 * a SSID or BSSID filter is sent in the command
476 */
477 *pfilteredscan = 0;
478
479 /* Initialize the scan as not being only on the current channel. If
480 * the channel list is customized, only contains one channel, and
481 * is the active channel, this is set true and data flow is not halted.
482 */
483 *pscancurrentonly = 0;
484
485 if (puserscanin) {
486
487 /* Set the bss type scan filter, use adapter setting if unset */
488 pscancfgout->bsstype =
489 (puserscanin->bsstype ? puserscanin->bsstype : adapter->
490 scanmode);
491
492 /* Set the number of probes to send, use adapter setting if unset */
493 numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
494 adapter->scanprobes);
495
496 /*
497 * Set the BSSID filter to the incoming configuration,
498 * if non-zero. If not set, it will remain disabled (all zeros).
499 */
500 memcpy(pscancfgout->specificBSSID,
501 puserscanin->specificBSSID,
502 sizeof(pscancfgout->specificBSSID));
503
504 ssidlen = strlen(puserscanin->specificSSID);
505
506 if (ssidlen) {
507 pssidtlv =
508 (struct mrvlietypes_ssidparamset *) pscancfgout->
509 tlvbuffer;
510 pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
511 pssidtlv->header.len = cpu_to_le16(ssidlen);
512 memcpy(pssidtlv->ssid, puserscanin->specificSSID,
513 ssidlen);
514 ptlvpos += sizeof(pssidtlv->header) + ssidlen;
515 }
516
517 /*
518 * The default number of channels sent in the command is low to
519 * ensure the response buffer from the firmware does not truncate
520 * scan results. That is not an issue with an SSID or BSSID
521 * filter applied to the scan results in the firmware.
522 */
523 if (ssidlen || (memcmp(pscancfgout->specificBSSID,
524 &zeromac, sizeof(zeromac)) != 0)) {
525 *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
526 *pfilteredscan = 1;
527 }
528 } else {
529 pscancfgout->bsstype = adapter->scanmode;
530 numprobes = adapter->scanprobes;
531 }
532
533 /* If the input config or adapter has the number of Probes set, add tlv */
534 if (numprobes) {
535 pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
536 pnumprobestlv->header.type =
537 cpu_to_le16(TLV_TYPE_NUMPROBES);
538 pnumprobestlv->header.len = sizeof(pnumprobestlv->numprobes);
539 pnumprobestlv->numprobes = cpu_to_le16(numprobes);
540
541 ptlvpos +=
542 sizeof(pnumprobestlv->header) + pnumprobestlv->header.len;
543
544 pnumprobestlv->header.len =
545 cpu_to_le16(pnumprobestlv->header.len);
546 }
547
548 /*
549 * Set the output for the channel TLV to the address in the tlv buffer
550 * past any TLVs that were added in this fuction (SSID, numprobes).
551 * channel TLVs will be added past this for each scan command, preserving
552 * the TLVs that were previously added.
553 */
554 *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
555
556 if (puserscanin && puserscanin->chanlist[0].channumber) {
557
558 lbs_pr_debug(1, "Scan: Using supplied channel list\n");
559
560 for (chanidx = 0;
561 chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
562 && puserscanin->chanlist[chanidx].channumber; chanidx++) {
563
564 channel = puserscanin->chanlist[chanidx].channumber;
565 (pscanchanlist + chanidx)->channumber = channel;
566
567 radiotype = puserscanin->chanlist[chanidx].radiotype;
568 (pscanchanlist + chanidx)->radiotype = radiotype;
569
570 scantype = puserscanin->chanlist[chanidx].scantype;
571
572 if (scantype == cmd_scan_type_passive) {
573 (pscanchanlist +
574 chanidx)->chanscanmode.passivescan = 1;
575 } else {
576 (pscanchanlist +
577 chanidx)->chanscanmode.passivescan = 0;
578 }
579
580 if (puserscanin->chanlist[chanidx].scantime) {
581 scandur =
582 puserscanin->chanlist[chanidx].scantime;
583 } else {
584 if (scantype == cmd_scan_type_passive) {
585 scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
586 } else {
587 scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
588 }
589 }
590
591 (pscanchanlist + chanidx)->minscantime =
592 cpu_to_le16(scandur);
593 (pscanchanlist + chanidx)->maxscantime =
594 cpu_to_le16(scandur);
595 }
596
597 /* Check if we are only scanning the current channel */
598 if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
599 ==
600 priv->adapter->curbssparams.channel)) {
601 *pscancurrentonly = 1;
602 lbs_pr_debug(1, "Scan: Scanning current channel only");
603 }
604
605 } else {
606 lbs_pr_debug(1, "Scan: Creating full region channel list\n");
607 wlan_scan_create_channel_list(priv, pscanchanlist,
608 *pfilteredscan);
609 }
610
611out:
612 return pscancfgout;
613}
614
615/**
616 * @brief Construct and send multiple scan config commands to the firmware
617 *
618 * Previous routines have created a wlan_scan_cmd_config with any requested
619 * TLVs. This function splits the channel TLV into maxchanperscan lists
620 * and sends the portion of the channel TLV along with the other TLVs
621 * to the wlan_cmd routines for execution in the firmware.
622 *
623 * @param priv A pointer to wlan_private structure
624 * @param maxchanperscan Maximum number channels to be included in each
625 * scan command sent to firmware
626 * @param filteredscan Flag indicating whether or not a BSSID or SSID
627 * filter is being used for the firmware command
628 * scan command sent to firmware
629 * @param pscancfgout Scan configuration used for this scan.
630 * @param pchantlvout Pointer in the pscancfgout where the channel TLV
631 * should start. This is past any other TLVs that
632 * must be sent down in each firmware command.
633 * @param pscanchanlist List of channels to scan in maxchanperscan segments
634 *
635 * @return 0 or error return otherwise
636 */
637static int wlan_scan_channel_list(wlan_private * priv,
638 int maxchanperscan,
639 u8 filteredscan,
640 struct wlan_scan_cmd_config * pscancfgout,
641 struct mrvlietypes_chanlistparamset * pchantlvout,
642 struct chanscanparamset * pscanchanlist)
643{
644 struct chanscanparamset *ptmpchan;
645 struct chanscanparamset *pstartchan;
646 u8 scanband;
647 int doneearly;
648 int tlvidx;
649 int ret = 0;
650
651 ENTER();
652
653 if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
654 lbs_pr_debug(1, "Scan: Null detect: %p, %p, %p\n",
655 pscancfgout, pchantlvout, pscanchanlist);
656 return -1;
657 }
658
659 pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
660
661 /* Set the temp channel struct pointer to the start of the desired list */
662 ptmpchan = pscanchanlist;
663
664 /* Loop through the desired channel list, sending a new firmware scan
665 * commands for each maxchanperscan channels (or for 1,6,11 individually
666 * if configured accordingly)
667 */
668 while (ptmpchan->channumber) {
669
670 tlvidx = 0;
671 pchantlvout->header.len = 0;
672 scanband = ptmpchan->radiotype;
673 pstartchan = ptmpchan;
674 doneearly = 0;
675
676 /* Construct the channel TLV for the scan command. Continue to
677 * insert channel TLVs until:
678 * - the tlvidx hits the maximum configured per scan command
679 * - the next channel to insert is 0 (end of desired channel list)
680 * - doneearly is set (controlling individual scanning of 1,6,11)
681 */
682 while (tlvidx < maxchanperscan && ptmpchan->channumber
683 && !doneearly) {
684
685 lbs_pr_debug(1,
686 "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
687 ptmpchan->channumber, ptmpchan->radiotype,
688 ptmpchan->chanscanmode.passivescan,
689 ptmpchan->chanscanmode.disablechanfilt,
690 ptmpchan->maxscantime);
691
692 /* Copy the current channel TLV to the command being prepared */
693 memcpy(pchantlvout->chanscanparam + tlvidx,
694 ptmpchan, sizeof(pchantlvout->chanscanparam));
695
696 /* Increment the TLV header length by the size appended */
697 pchantlvout->header.len +=
698 sizeof(pchantlvout->chanscanparam);
699
700 /*
701 * The tlv buffer length is set to the number of bytes of the
702 * between the channel tlv pointer and the start of the
703 * tlv buffer. This compensates for any TLVs that were appended
704 * before the channel list.
705 */
706 pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
707 - pscancfgout->tlvbuffer);
708
709 /* Add the size of the channel tlv header and the data length */
710 pscancfgout->tlvbufferlen +=
711 (sizeof(pchantlvout->header)
712 + pchantlvout->header.len);
713
714 /* Increment the index to the channel tlv we are constructing */
715 tlvidx++;
716
717 doneearly = 0;
718
719 /* Stop the loop if the *current* channel is in the 1,6,11 set
720 * and we are not filtering on a BSSID or SSID.
721 */
722 if (!filteredscan && (ptmpchan->channumber == 1
723 || ptmpchan->channumber == 6
724 || ptmpchan->channumber == 11)) {
725 doneearly = 1;
726 }
727
728 /* Increment the tmp pointer to the next channel to be scanned */
729 ptmpchan++;
730
731 /* Stop the loop if the *next* channel is in the 1,6,11 set.
732 * This will cause it to be the only channel scanned on the next
733 * interation
734 */
735 if (!filteredscan && (ptmpchan->channumber == 1
736 || ptmpchan->channumber == 6
737 || ptmpchan->channumber == 11)) {
738 doneearly = 1;
739 }
740 }
741
742 /* Send the scan command to the firmware with the specified cfg */
743 ret = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
744 0, 0, pscancfgout);
745 }
746
747 LEAVE();
748 return ret;
749}
750
751/**
752 * @brief Internal function used to start a scan based on an input config
753 *
754 * Use the input user scan configuration information when provided in
755 * order to send the appropriate scan commands to firmware to populate or
756 * update the internal driver scan table
757 *
758 * @param priv A pointer to wlan_private structure
759 * @param puserscanin Pointer to the input configuration for the requested
760 * scan.
761 *
762 * @return 0 or < 0 if error
763 */
764int wlan_scan_networks(wlan_private * priv,
765 const struct wlan_ioctl_user_scan_cfg * puserscanin)
766{
767 wlan_adapter *adapter = priv->adapter;
768 struct mrvlietypes_chanlistparamset *pchantlvout;
769 struct chanscanparamset * scan_chan_list = NULL;
770 struct wlan_scan_cmd_config * scan_cfg = NULL;
771 u8 keeppreviousscan;
772 u8 filteredscan;
773 u8 scancurrentchanonly;
774 int maxchanperscan;
775 int ret;
776
777 ENTER();
778
779 scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
780 WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
781 if (scan_chan_list == NULL) {
782 ret = -ENOMEM;
783 goto out;
784 }
785
786 scan_cfg = wlan_scan_setup_scan_config(priv,
787 puserscanin,
788 &pchantlvout,
789 scan_chan_list,
790 &maxchanperscan,
791 &filteredscan,
792 &scancurrentchanonly);
793 if (scan_cfg == NULL) {
794 ret = -ENOMEM;
795 goto out;
796 }
797
798 keeppreviousscan = 0;
799
800 if (puserscanin) {
801 keeppreviousscan = puserscanin->keeppreviousscan;
802 }
803
804 if (!keeppreviousscan) {
805 memset(adapter->scantable, 0x00,
806 sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST);
807 adapter->numinscantable = 0;
808 }
809
810 /* Keep the data path active if we are only scanning our current channel */
811 if (!scancurrentchanonly) {
812 netif_stop_queue(priv->wlan_dev.netdev);
813 netif_carrier_off(priv->wlan_dev.netdev);
814 }
815
816 ret = wlan_scan_channel_list(priv,
817 maxchanperscan,
818 filteredscan,
819 scan_cfg,
820 pchantlvout,
821 scan_chan_list);
822
823 /* Process the resulting scan table:
824 * - Remove any bad ssids
825 * - Update our current BSS information from scan data
826 */
827 wlan_scan_process_results(priv);
828
829 if (priv->adapter->connect_status == libertas_connected) {
830 netif_carrier_on(priv->wlan_dev.netdev);
831 netif_wake_queue(priv->wlan_dev.netdev);
832 }
833
834out:
835 if (scan_cfg)
836 kfree(scan_cfg);
837
838 if (scan_chan_list)
839 kfree(scan_chan_list);
840
841 LEAVE();
842 return ret;
843}
844
845/**
846 * @brief Inspect the scan response buffer for pointers to expected TLVs
847 *
848 * TLVs can be included at the end of the scan response BSS information.
849 * Parse the data in the buffer for pointers to TLVs that can potentially
850 * be passed back in the response
851 *
852 * @param ptlv Pointer to the start of the TLV buffer to parse
853 * @param tlvbufsize size of the TLV buffer
854 * @param ptsftlv Output parameter: Pointer to the TSF TLV if found
855 *
856 * @return void
857 */
858static
859void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
860 int tlvbufsize,
861 struct mrvlietypes_tsftimestamp ** ptsftlv)
862{
863 struct mrvlietypes_data *pcurrenttlv;
864 int tlvbufleft;
865 u16 tlvtype;
866 u16 tlvlen;
867
868 pcurrenttlv = ptlv;
869 tlvbufleft = tlvbufsize;
870 *ptsftlv = NULL;
871
872 lbs_pr_debug(1, "SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
873 lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
874
875 while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
876 tlvtype = le16_to_cpu(pcurrenttlv->header.type);
877 tlvlen = le16_to_cpu(pcurrenttlv->header.len);
878
879 switch (tlvtype) {
880 case TLV_TYPE_TSFTIMESTAMP:
881 *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
882 break;
883
884 default:
885 lbs_pr_debug(1, "SCAN_RESP: Unhandled TLV = %d\n",
886 tlvtype);
887 /* Give up, this seems corrupted */
888 return;
889 } /* switch */
890
891 tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
892 pcurrenttlv =
893 (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
894 } /* while */
895}
896
897/**
898 * @brief Interpret a BSS scan response returned from the firmware
899 *
900 * Parse the various fixed fields and IEs passed back for a a BSS probe
901 * response or beacon from the scan command. Record information as needed
902 * in the scan table struct bss_descriptor for that entry.
903 *
904 * @param pBSSIDEntry Output parameter: Pointer to the BSS Entry
905 *
906 * @return 0 or -1
907 */
908static int InterpretBSSDescriptionWithIE(struct bss_descriptor * pBSSEntry,
909 u8 ** pbeaconinfo, int *bytesleft)
910{
911 enum ieeetypes_elementid elemID;
912 struct ieeetypes_fhparamset *pFH;
913 struct ieeetypes_dsparamset *pDS;
914 struct ieeetypes_cfparamset *pCF;
915 struct ieeetypes_ibssparamset *pibss;
916 struct ieeetypes_capinfo *pcap;
917 struct WLAN_802_11_FIXED_IEs fixedie;
918 u8 *pcurrentptr;
919 u8 *pRate;
920 u8 elemlen;
921 u8 bytestocopy;
922 u8 ratesize;
923 u16 beaconsize;
924 u8 founddatarateie;
925 int bytesleftforcurrentbeacon;
926
927 struct WPA_SUPPLICANT *pwpa_supplicant;
928 struct WPA_SUPPLICANT *pwpa2_supplicant;
929 struct IE_WPA *pIe;
930 const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
931
932 struct ieeetypes_countryinfoset *pcountryinfo;
933
934 ENTER();
935
936 founddatarateie = 0;
937 ratesize = 0;
938 beaconsize = 0;
939
940 if (*bytesleft >= sizeof(beaconsize)) {
941 /* Extract & convert beacon size from the command buffer */
942 memcpy(&beaconsize, *pbeaconinfo, sizeof(beaconsize));
943 beaconsize = le16_to_cpu(beaconsize);
944 *bytesleft -= sizeof(beaconsize);
945 *pbeaconinfo += sizeof(beaconsize);
946 }
947
948 if (beaconsize == 0 || beaconsize > *bytesleft) {
949
950 *pbeaconinfo += *bytesleft;
951 *bytesleft = 0;
952
953 return -1;
954 }
955
956 /* Initialize the current working beacon pointer for this BSS iteration */
957 pcurrentptr = *pbeaconinfo;
958
959 /* Advance the return beacon pointer past the current beacon */
960 *pbeaconinfo += beaconsize;
961 *bytesleft -= beaconsize;
962
963 bytesleftforcurrentbeacon = beaconsize;
964
965 pwpa_supplicant = &pBSSEntry->wpa_supplicant;
966 pwpa2_supplicant = &pBSSEntry->wpa2_supplicant;
967
968 memcpy(pBSSEntry->macaddress, pcurrentptr, ETH_ALEN);
969 lbs_pr_debug(1, "InterpretIE: AP MAC Addr-%x:%x:%x:%x:%x:%x\n",
970 pBSSEntry->macaddress[0], pBSSEntry->macaddress[1],
971 pBSSEntry->macaddress[2], pBSSEntry->macaddress[3],
972 pBSSEntry->macaddress[4], pBSSEntry->macaddress[5]);
973
974 pcurrentptr += ETH_ALEN;
975 bytesleftforcurrentbeacon -= ETH_ALEN;
976
977 if (bytesleftforcurrentbeacon < 12) {
978 lbs_pr_debug(1, "InterpretIE: Not enough bytes left\n");
979 return -1;
980 }
981
982 /*
983 * next 4 fields are RSSI, time stamp, beacon interval,
984 * and capability information
985 */
986
987 /* RSSI is 1 byte long */
988 pBSSEntry->rssi = le32_to_cpu((long)(*pcurrentptr));
989 lbs_pr_debug(1, "InterpretIE: RSSI=%02X\n", *pcurrentptr);
990 pcurrentptr += 1;
991 bytesleftforcurrentbeacon -= 1;
992
993 /* time stamp is 8 bytes long */
994 memcpy(fixedie.timestamp, pcurrentptr, 8);
995 memcpy(pBSSEntry->timestamp, pcurrentptr, 8);
996 pcurrentptr += 8;
997 bytesleftforcurrentbeacon -= 8;
998
999 /* beacon interval is 2 bytes long */
1000 memcpy(&fixedie.beaconinterval, pcurrentptr, 2);
1001 pBSSEntry->beaconperiod = le16_to_cpu(fixedie.beaconinterval);
1002 pcurrentptr += 2;
1003 bytesleftforcurrentbeacon -= 2;
1004
1005 /* capability information is 2 bytes long */
1006 memcpy(&fixedie.capabilities, pcurrentptr, 2);
1007 lbs_pr_debug(1, "InterpretIE: fixedie.capabilities=0x%X\n",
1008 fixedie.capabilities);
1009 fixedie.capabilities = le16_to_cpu(fixedie.capabilities);
1010 pcap = (struct ieeetypes_capinfo *) & fixedie.capabilities;
1011 memcpy(&pBSSEntry->cap, pcap, sizeof(struct ieeetypes_capinfo));
1012 pcurrentptr += 2;
1013 bytesleftforcurrentbeacon -= 2;
1014
1015 /* rest of the current buffer are IE's */
1016 lbs_pr_debug(1, "InterpretIE: IElength for this AP = %d\n",
1017 bytesleftforcurrentbeacon);
1018
1019 lbs_dbg_hex("InterpretIE: IE info", (u8 *) pcurrentptr,
1020 bytesleftforcurrentbeacon);
1021
1022 if (pcap->privacy) {
1023 lbs_pr_debug(1, "InterpretIE: AP WEP enabled\n");
1024 pBSSEntry->privacy = wlan802_11privfilter8021xWEP;
1025 } else {
1026 pBSSEntry->privacy = wlan802_11privfilteracceptall;
1027 }
1028
1029 if (pcap->ibss == 1) {
1030 pBSSEntry->inframode = wlan802_11ibss;
1031 } else {
1032 pBSSEntry->inframode = wlan802_11infrastructure;
1033 }
1034
1035 /* process variable IE */
1036 while (bytesleftforcurrentbeacon >= 2) {
1037 elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
1038 elemlen = *((u8 *) pcurrentptr + 1);
1039
1040 if (bytesleftforcurrentbeacon < elemlen) {
1041 lbs_pr_debug(1, "InterpretIE: error in processing IE, "
1042 "bytes left < IE length\n");
1043 bytesleftforcurrentbeacon = 0;
1044 continue;
1045 }
1046
1047 switch (elemID) {
1048
1049 case SSID:
1050 pBSSEntry->ssid.ssidlength = elemlen;
1051 memcpy(pBSSEntry->ssid.ssid, (pcurrentptr + 2),
1052 elemlen);
1053 lbs_pr_debug(1, "ssid: %32s", pBSSEntry->ssid.ssid);
1054 break;
1055
1056 case SUPPORTED_RATES:
1057 memcpy(pBSSEntry->datarates, (pcurrentptr + 2),
1058 elemlen);
1059 memmove(pBSSEntry->libertas_supported_rates, (pcurrentptr + 2),
1060 elemlen);
1061 ratesize = elemlen;
1062 founddatarateie = 1;
1063 break;
1064
1065 case EXTRA_IE:
1066 lbs_pr_debug(1, "InterpretIE: EXTRA_IE Found!\n");
1067 pBSSEntry->extra_ie = 1;
1068 break;
1069
1070 case FH_PARAM_SET:
1071 pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
1072 memmove(&pBSSEntry->phyparamset.fhparamset, pFH,
1073 sizeof(struct ieeetypes_fhparamset));
1074 pBSSEntry->phyparamset.fhparamset.dwelltime
1075 =
1076 le16_to_cpu(pBSSEntry->phyparamset.fhparamset.
1077 dwelltime);
1078 break;
1079
1080 case DS_PARAM_SET:
1081 pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
1082
1083 pBSSEntry->channel = pDS->currentchan;
1084
1085 memcpy(&pBSSEntry->phyparamset.dsparamset, pDS,
1086 sizeof(struct ieeetypes_dsparamset));
1087 break;
1088
1089 case CF_PARAM_SET:
1090 pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
1091
1092 memcpy(&pBSSEntry->ssparamset.cfparamset, pCF,
1093 sizeof(struct ieeetypes_cfparamset));
1094 break;
1095
1096 case IBSS_PARAM_SET:
1097 pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
1098 pBSSEntry->atimwindow =
1099 le32_to_cpu(pibss->atimwindow);
1100
1101 memmove(&pBSSEntry->ssparamset.ibssparamset, pibss,
1102 sizeof(struct ieeetypes_ibssparamset));
1103
1104 pBSSEntry->ssparamset.ibssparamset.atimwindow
1105 =
1106 le16_to_cpu(pBSSEntry->ssparamset.ibssparamset.
1107 atimwindow);
1108 break;
1109
1110 /* Handle Country Info IE */
1111 case COUNTRY_INFO:
1112 pcountryinfo =
1113 (struct ieeetypes_countryinfoset *) pcurrentptr;
1114
1115 if (pcountryinfo->len <
1116 sizeof(pcountryinfo->countrycode)
1117 || pcountryinfo->len > 254) {
1118 lbs_pr_debug(1, "InterpretIE: 11D- Err "
1119 "CountryInfo len =%d min=%d max=254\n",
1120 pcountryinfo->len,
1121 sizeof(pcountryinfo->countrycode));
1122 LEAVE();
1123 return -1;
1124 }
1125
1126 memcpy(&pBSSEntry->countryinfo,
1127 pcountryinfo, pcountryinfo->len + 2);
1128 lbs_dbg_hex("InterpretIE: 11D- CountryInfo:",
1129 (u8 *) pcountryinfo,
1130 (u32) (pcountryinfo->len + 2));
1131 break;
1132
1133 case EXTENDED_SUPPORTED_RATES:
1134 /*
1135 * only process extended supported rate
1136 * if data rate is already found.
1137 * data rate IE should come before
1138 * extended supported rate IE
1139 */
1140 if (founddatarateie) {
1141 if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
1142 bytestocopy =
1143 (WLAN_SUPPORTED_RATES - ratesize);
1144 } else {
1145 bytestocopy = elemlen;
1146 }
1147
1148 pRate = (u8 *) pBSSEntry->datarates;
1149 pRate += ratesize;
1150 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1151
1152 pRate = (u8 *) pBSSEntry->libertas_supported_rates;
1153
1154 pRate += ratesize;
1155 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1156 }
1157 break;
1158
1159 case VENDOR_SPECIFIC_221:
1160#define IE_ID_LEN_FIELDS_BYTES 2
1161 pIe = (struct IE_WPA *)pcurrentptr;
1162
1163 if (!memcmp(pIe->oui, oui01, sizeof(oui01))) {
1164 pwpa_supplicant->wpa_ie_len
1165 = min_t(size_t, elemlen + IE_ID_LEN_FIELDS_BYTES,
1166 sizeof(pwpa_supplicant->wpa_ie));
1167 memcpy(pwpa_supplicant->wpa_ie,
1168 pcurrentptr,
1169 pwpa_supplicant->wpa_ie_len);
1170 lbs_dbg_hex("InterpretIE: Resp WPA_IE",
1171 pwpa_supplicant->wpa_ie, elemlen);
1172 }
1173 break;
1174 case WPA2_IE:
1175 pIe = (struct IE_WPA *)pcurrentptr;
1176 pwpa2_supplicant->wpa_ie_len
1177 = min_t(size_t, elemlen + IE_ID_LEN_FIELDS_BYTES,
1178 sizeof(pwpa2_supplicant->wpa_ie));
1179 memcpy(pwpa2_supplicant->wpa_ie,
1180 pcurrentptr, pwpa2_supplicant->wpa_ie_len);
1181
1182 lbs_dbg_hex("InterpretIE: Resp WPA2_IE",
1183 pwpa2_supplicant->wpa_ie, elemlen);
1184 break;
1185 case TIM:
1186 break;
1187
1188 case CHALLENGE_TEXT:
1189 break;
1190 }
1191
1192 pcurrentptr += elemlen + 2;
1193
1194 /* need to account for IE ID and IE len */
1195 bytesleftforcurrentbeacon -= (elemlen + 2);
1196
1197 } /* while (bytesleftforcurrentbeacon > 2) */
1198
1199 return 0;
1200}
1201
1202/**
1203 * @brief Compare two SSIDs
1204 *
1205 * @param ssid1 A pointer to ssid to compare
1206 * @param ssid2 A pointer to ssid to compare
1207 *
1208 * @return 0--ssid is same, otherwise is different
1209 */
1210int libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1, struct WLAN_802_11_SSID *ssid2)
1211{
1212 if (!ssid1 || !ssid2)
1213 return -1;
1214
1215 if (ssid1->ssidlength != ssid2->ssidlength)
1216 return -1;
1217
1218 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssidlength);
1219}
1220
1221/**
1222 * @brief This function finds a specific compatible BSSID in the scan list
1223 *
1224 * @param adapter A pointer to wlan_adapter
1225 * @param bssid BSSID to find in the scan list
1226 * @param mode Network mode: Infrastructure or IBSS
1227 *
1228 * @return index in BSSID list, or error return code (< 0)
1229 */
1230int libertas_find_BSSID_in_list(wlan_adapter * adapter, u8 * bssid, int mode)
1231{
1232 int ret = -ENETUNREACH;
1233 int i;
1234
1235 if (!bssid)
1236 return -EFAULT;
1237
1238 lbs_pr_debug(1, "FindBSSID: Num of BSSIDs = %d\n",
1239 adapter->numinscantable);
1240
1241 /* Look through the scan table for a compatible match. The ret return
1242 * variable will be equal to the index in the scan table (greater
1243 * than zero) if the network is compatible. The loop will continue
1244 * past a matched bssid that is not compatible in case there is an
1245 * AP with multiple SSIDs assigned to the same BSSID
1246 */
1247 for (i = 0; ret < 0 && i < adapter->numinscantable; i++) {
1248 if (!memcmp(adapter->scantable[i].macaddress, bssid, ETH_ALEN)) {
1249 switch (mode) {
1250 case wlan802_11infrastructure:
1251 case wlan802_11ibss:
1252 ret = is_network_compatible(adapter, i, mode);
1253 break;
1254 default:
1255 ret = i;
1256 break;
1257 }
1258 }
1259 }
1260
1261 return ret;
1262}
1263
1264/**
1265 * @brief This function finds ssid in ssid list.
1266 *
1267 * @param adapter A pointer to wlan_adapter
1268 * @param ssid SSID to find in the list
1269 * @param bssid BSSID to qualify the SSID selection (if provided)
1270 * @param mode Network mode: Infrastructure or IBSS
1271 *
1272 * @return index in BSSID list
1273 */
1274int libertas_find_SSID_in_list(wlan_adapter * adapter,
1275 struct WLAN_802_11_SSID *ssid, u8 * bssid, int mode)
1276{
1277 int net = -ENETUNREACH;
1278 u8 bestrssi = 0;
1279 int i;
1280 int j;
1281
1282 lbs_pr_debug(1, "Num of Entries in Table = %d\n", adapter->numinscantable);
1283
1284 for (i = 0; i < adapter->numinscantable; i++) {
1285 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid, ssid) &&
1286 (!bssid ||
1287 !memcmp(adapter->scantable[i].
1288 macaddress, bssid, ETH_ALEN))) {
1289 switch (mode) {
1290 case wlan802_11infrastructure:
1291 case wlan802_11ibss:
1292 j = is_network_compatible(adapter, i, mode);
1293
1294 if (j >= 0) {
1295 if (bssid) {
1296 return i;
1297 }
1298
1299 if (SCAN_RSSI
1300 (adapter->scantable[i].rssi)
1301 > bestrssi) {
1302 bestrssi =
1303 SCAN_RSSI(adapter->
1304 scantable[i].
1305 rssi);
1306 net = i;
1307 }
1308 } else {
1309 if (net == -ENETUNREACH) {
1310 net = j;
1311 }
1312 }
1313 break;
1314 case wlan802_11autounknown:
1315 default:
1316 if (SCAN_RSSI(adapter->scantable[i].rssi)
1317 > bestrssi) {
1318 bestrssi =
1319 SCAN_RSSI(adapter->scantable[i].
1320 rssi);
1321 net = i;
1322 }
1323 break;
1324 }
1325 }
1326 }
1327
1328 return net;
1329}
1330
1331/**
1332 * @brief This function finds the best SSID in the Scan List
1333 *
1334 * Search the scan table for the best SSID that also matches the current
1335 * adapter network preference (infrastructure or adhoc)
1336 *
1337 * @param adapter A pointer to wlan_adapter
1338 *
1339 * @return index in BSSID list
1340 */
1341int libertas_find_best_SSID_in_list(wlan_adapter * adapter,
1342 enum WLAN_802_11_NETWORK_INFRASTRUCTURE mode)
1343{
1344 int bestnet = -ENETUNREACH;
1345 u8 bestrssi = 0;
1346 int i;
1347
1348 ENTER();
1349
1350 lbs_pr_debug(1, "Num of BSSIDs = %d\n", adapter->numinscantable);
1351
1352 for (i = 0; i < adapter->numinscantable; i++) {
1353 switch (mode) {
1354 case wlan802_11infrastructure:
1355 case wlan802_11ibss:
1356 if (is_network_compatible(adapter, i, mode) >= 0) {
1357 if (SCAN_RSSI(adapter->scantable[i].rssi) >
1358 bestrssi) {
1359 bestrssi =
1360 SCAN_RSSI(adapter->scantable[i].
1361 rssi);
1362 bestnet = i;
1363 }
1364 }
1365 break;
1366 case wlan802_11autounknown:
1367 default:
1368 if (SCAN_RSSI(adapter->scantable[i].rssi) > bestrssi) {
1369 bestrssi =
1370 SCAN_RSSI(adapter->scantable[i].rssi);
1371 bestnet = i;
1372 }
1373 break;
1374 }
1375 }
1376
1377 LEAVE();
1378 return bestnet;
1379}
1380
1381/**
1382 * @brief Find the AP with specific ssid in the scan list
1383 *
1384 * @param priv A pointer to wlan_private structure
1385 * @param pSSID A pointer to AP's ssid
1386 *
1387 * @return 0--success, otherwise--fail
1388 */
1389int libertas_find_best_network_SSID(wlan_private * priv,
1390 struct WLAN_802_11_SSID *pSSID,
1391 enum WLAN_802_11_NETWORK_INFRASTRUCTURE preferred_mode,
1392 enum WLAN_802_11_NETWORK_INFRASTRUCTURE *out_mode)
1393{
1394 wlan_adapter *adapter = priv->adapter;
1395 int ret = 0;
1396 struct bss_descriptor *preqbssid;
1397 int i;
1398
1399 ENTER();
1400
1401 memset(pSSID, 0, sizeof(struct WLAN_802_11_SSID));
1402
1403 wlan_scan_networks(priv, NULL);
1404 if (adapter->surpriseremoved)
1405 return -1;
1406 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1407
1408 i = libertas_find_best_SSID_in_list(adapter, preferred_mode);
1409 if (i < 0) {
1410 ret = -1;
1411 goto out;
1412 }
1413
1414 preqbssid = &adapter->scantable[i];
1415 memcpy(pSSID, &preqbssid->ssid,
1416 sizeof(struct WLAN_802_11_SSID));
1417 *out_mode = preqbssid->inframode;
1418
1419 if (!pSSID->ssidlength) {
1420 ret = -1;
1421 }
1422
1423out:
1424 LEAVE();
1425 return ret;
1426}
1427
1428/**
1429 * @brief Scan Network
1430 *
1431 * @param dev A pointer to net_device structure
1432 * @param info A pointer to iw_request_info structure
1433 * @param vwrq A pointer to iw_param structure
1434 * @param extra A pointer to extra data buf
1435 *
1436 * @return 0 --success, otherwise fail
1437 */
1438int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
1439 struct iw_param *vwrq, char *extra)
1440{
1441 wlan_private *priv = dev->priv;
1442 wlan_adapter *adapter = priv->adapter;
1443 union iwreq_data wrqu;
1444
1445 ENTER();
1446
1447 if (!wlan_scan_networks(priv, NULL)) {
1448 memset(&wrqu, 0, sizeof(union iwreq_data));
1449 wireless_send_event(priv->wlan_dev.netdev, SIOCGIWSCAN, &wrqu,
1450 NULL);
1451 }
1452
1453 if (adapter->surpriseremoved)
1454 return -1;
1455
1456 LEAVE();
1457 return 0;
1458}
1459
1460/**
1461 * @brief Send a scan command for all available channels filtered on a spec
1462 *
1463 * @param priv A pointer to wlan_private structure
1464 * @param prequestedssid A pointer to AP's ssid
1465 * @param keeppreviousscan Flag used to save/clear scan table before scan
1466 *
1467 * @return 0-success, otherwise fail
1468 */
1469int libertas_send_specific_SSID_scan(wlan_private * priv,
1470 struct WLAN_802_11_SSID *prequestedssid,
1471 u8 keeppreviousscan)
1472{
1473 wlan_adapter *adapter = priv->adapter;
1474 struct wlan_ioctl_user_scan_cfg scancfg;
1475
1476 ENTER();
1477
1478 if (prequestedssid == NULL) {
1479 return -1;
1480 }
1481
1482 memset(&scancfg, 0x00, sizeof(scancfg));
1483
1484 memcpy(scancfg.specificSSID, prequestedssid->ssid,
1485 prequestedssid->ssidlength);
1486 scancfg.keeppreviousscan = keeppreviousscan;
1487
1488 wlan_scan_networks(priv, &scancfg);
1489 if (adapter->surpriseremoved)
1490 return -1;
1491 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1492
1493 LEAVE();
1494 return 0;
1495}
1496
1497/**
1498 * @brief scan an AP with specific BSSID
1499 *
1500 * @param priv A pointer to wlan_private structure
1501 * @param bssid A pointer to AP's bssid
1502 * @param keeppreviousscan Flag used to save/clear scan table before scan
1503 *
1504 * @return 0-success, otherwise fail
1505 */
1506int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
1507{
1508 struct wlan_ioctl_user_scan_cfg scancfg;
1509
1510 ENTER();
1511
1512 if (bssid == NULL) {
1513 return -1;
1514 }
1515
1516 memset(&scancfg, 0x00, sizeof(scancfg));
1517 memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
1518 scancfg.keeppreviousscan = keeppreviousscan;
1519
1520 wlan_scan_networks(priv, &scancfg);
1521 if (priv->adapter->surpriseremoved)
1522 return -1;
1523 wait_event_interruptible(priv->adapter->cmd_pending,
1524 !priv->adapter->nr_cmd_pending);
1525
1526 LEAVE();
1527 return 0;
1528}
1529
1530/**
1531 * @brief Retrieve the scan table entries via wireless tools IOCTL call
1532 *
1533 * @param dev A pointer to net_device structure
1534 * @param info A pointer to iw_request_info structure
1535 * @param dwrq A pointer to iw_point structure
1536 * @param extra A pointer to extra data buf
1537 *
1538 * @return 0 --success, otherwise fail
1539 */
1540int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
1541 struct iw_point *dwrq, char *extra)
1542{
1543 wlan_private *priv = dev->priv;
1544 wlan_adapter *adapter = priv->adapter;
1545 int ret = 0;
1546 char *current_ev = extra;
1547 char *end_buf = extra + IW_SCAN_MAX_DATA;
1548 struct chan_freq_power *cfp;
1549 struct bss_descriptor *pscantable;
1550 char *current_val; /* For rates */
1551 struct iw_event iwe; /* Temporary buffer */
1552 int i;
1553 int j;
1554 int rate;
1555#define PERFECT_RSSI ((u8)50)
1556#define WORST_RSSI ((u8)0)
1557#define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
1558 u8 rssi;
1559
1560 u8 buf[16 + 256 * 2];
1561 u8 *ptr;
1562
1563 ENTER();
1564
1565 /*
1566 * if there's either commands in the queue or one being
1567 * processed return -EAGAIN for iwlist to retry later.
1568 */
1569 if (adapter->nr_cmd_pending)
1570 return -EAGAIN;
1571
1572 if (adapter->connect_status == libertas_connected)
1573 lbs_pr_debug(1, "Current ssid: %32s\n",
1574 adapter->curbssparams.ssid.ssid);
1575
1576 lbs_pr_debug(1, "Scan: Get: numinscantable = %d\n",
1577 adapter->numinscantable);
1578
1579 /* The old API using SIOCGIWAPLIST had a hard limit of IW_MAX_AP.
1580 * The new API using SIOCGIWSCAN is only limited by buffer size
1581 * WE-14 -> WE-16 the buffer is limited to IW_SCAN_MAX_DATA bytes
1582 * which is 4096.
1583 */
1584 for (i = 0; i < adapter->numinscantable; i++) {
1585 if ((current_ev + MAX_SCAN_CELL_SIZE) >= end_buf) {
1586 lbs_pr_debug(1, "i=%d break out: current_ev=%p end_buf=%p "
1587 "MAX_SCAN_CELL_SIZE=%d\n",
1588 i, current_ev, end_buf, MAX_SCAN_CELL_SIZE);
1589 break;
1590 }
1591
1592 pscantable = &adapter->scantable[i];
1593
1594 lbs_pr_debug(1, "i=%d ssid: %32s\n", i, pscantable->ssid.ssid);
1595
1596 cfp =
1597 libertas_find_cfp_by_band_and_channel(adapter, 0,
1598 pscantable->channel);
1599 if (!cfp) {
1600 lbs_pr_debug(1, "Invalid channel number %d\n",
1601 pscantable->channel);
1602 continue;
1603 }
1604
1605 if (!ssid_valid(&adapter->scantable[i].ssid)) {
1606 continue;
1607 }
1608
1609 /* First entry *MUST* be the AP MAC address */
1610 iwe.cmd = SIOCGIWAP;
1611 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1612 memcpy(iwe.u.ap_addr.sa_data,
1613 &adapter->scantable[i].macaddress, ETH_ALEN);
1614
1615 iwe.len = IW_EV_ADDR_LEN;
1616 current_ev =
1617 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1618
1619 //Add the ESSID
1620 iwe.u.data.length = adapter->scantable[i].ssid.ssidlength;
1621
1622 if (iwe.u.data.length > 32) {
1623 iwe.u.data.length = 32;
1624 }
1625
1626 iwe.cmd = SIOCGIWESSID;
1627 iwe.u.data.flags = 1;
1628 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1629 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1630 adapter->scantable[i].ssid.
1631 ssid);
1632
1633 //Add mode
1634 iwe.cmd = SIOCGIWMODE;
1635 iwe.u.mode = adapter->scantable[i].inframode + 1;
1636 iwe.len = IW_EV_UINT_LEN;
1637 current_ev =
1638 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1639
1640 //frequency
1641 iwe.cmd = SIOCGIWFREQ;
1642 iwe.u.freq.m = (long)cfp->freq * 100000;
1643 iwe.u.freq.e = 1;
1644 iwe.len = IW_EV_FREQ_LEN;
1645 current_ev =
1646 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1647
1648 /* Add quality statistics */
1649 iwe.cmd = IWEVQUAL;
1650 iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
1651 iwe.u.qual.level = SCAN_RSSI(adapter->scantable[i].rssi);
1652
1653 rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
1654 iwe.u.qual.qual =
1655 (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
1656 (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
1657 (RSSI_DIFF * RSSI_DIFF);
1658 if (iwe.u.qual.qual > 100)
1659 iwe.u.qual.qual = 100;
1660 else if (iwe.u.qual.qual < 1)
1661 iwe.u.qual.qual = 0;
1662
1663 if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
1664 iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
1665 } else {
1666 iwe.u.qual.noise =
1667 CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
1668 }
1669 if ((adapter->inframode == wlan802_11ibss) &&
1670 !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1671 &adapter->scantable[i].ssid)
1672 && adapter->adhoccreate) {
1673 ret = libertas_prepare_and_send_command(priv,
1674 cmd_802_11_rssi,
1675 0,
1676 cmd_option_waitforrsp,
1677 0, NULL);
1678
1679 if (!ret) {
1680 iwe.u.qual.level =
1681 CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] /
1682 AVG_SCALE,
1683 adapter->NF[TYPE_RXPD][TYPE_AVG] /
1684 AVG_SCALE);
1685 }
1686 }
1687 iwe.len = IW_EV_QUAL_LEN;
1688 current_ev =
1689 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1690
1691 /* Add encryption capability */
1692 iwe.cmd = SIOCGIWENCODE;
1693 if (adapter->scantable[i].privacy) {
1694 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1695 } else {
1696 iwe.u.data.flags = IW_ENCODE_DISABLED;
1697 }
1698 iwe.u.data.length = 0;
1699 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1700 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1701 adapter->scantable->ssid.
1702 ssid);
1703
1704 current_val = current_ev + IW_EV_LCP_LEN;
1705
1706 iwe.cmd = SIOCGIWRATE;
1707
1708 iwe.u.bitrate.fixed = 0;
1709 iwe.u.bitrate.disabled = 0;
1710 iwe.u.bitrate.value = 0;
1711
1712 /* Bit rate given in 500 kb/s units (+ 0x80) */
1713 for (j = 0; j < sizeof(adapter->scantable[i].libertas_supported_rates);
1714 j++) {
1715 if (adapter->scantable[i].libertas_supported_rates[j] == 0) {
1716 break;
1717 }
1718 rate =
1719 (adapter->scantable[i].libertas_supported_rates[j] & 0x7F) *
1720 500000;
1721 if (rate > iwe.u.bitrate.value) {
1722 iwe.u.bitrate.value = rate;
1723 }
1724
1725 iwe.u.bitrate.value =
1726 (adapter->scantable[i].libertas_supported_rates[j]
1727 & 0x7f) * 500000;
1728 iwe.len = IW_EV_PARAM_LEN;
1729 current_ev =
1730 iwe_stream_add_value(current_ev, current_val,
1731 end_buf, &iwe, iwe.len);
1732
1733 }
1734 if ((adapter->scantable[i].inframode == wlan802_11ibss)
1735 && !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1736 &adapter->scantable[i].ssid)
1737 && adapter->adhoccreate) {
1738 iwe.u.bitrate.value = 22 * 500000;
1739 }
1740 iwe.len = IW_EV_PARAM_LEN;
1741 current_ev =
1742 iwe_stream_add_value(current_ev, current_val, end_buf, &iwe,
1743 iwe.len);
1744
1745 /* Add new value to event */
1746 current_val = current_ev + IW_EV_LCP_LEN;
1747
1748 if (adapter->scantable[i].wpa2_supplicant.wpa_ie[0] == WPA2_IE) {
1749 memset(&iwe, 0, sizeof(iwe));
1750 memset(buf, 0, sizeof(buf));
1751 memcpy(buf, adapter->scantable[i].
1752 wpa2_supplicant.wpa_ie,
1753 adapter->scantable[i].wpa2_supplicant.
1754 wpa_ie_len);
1755 iwe.cmd = IWEVGENIE;
1756 iwe.u.data.length = adapter->scantable[i].
1757 wpa2_supplicant.wpa_ie_len;
1758 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1759 current_ev = iwe_stream_add_point(current_ev, end_buf,
1760 &iwe, buf);
1761 }
1762 if (adapter->scantable[i].wpa_supplicant.wpa_ie[0] == WPA_IE) {
1763 memset(&iwe, 0, sizeof(iwe));
1764 memset(buf, 0, sizeof(buf));
1765 memcpy(buf, adapter->scantable[i].
1766 wpa_supplicant.wpa_ie,
1767 adapter->scantable[i].wpa_supplicant.
1768 wpa_ie_len);
1769 iwe.cmd = IWEVGENIE;
1770 iwe.u.data.length = adapter->scantable[i].
1771 wpa_supplicant.wpa_ie_len;
1772 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1773 current_ev = iwe_stream_add_point(current_ev, end_buf,
1774 &iwe, buf);
1775 }
1776
1777
1778 if (adapter->scantable[i].extra_ie != 0) {
1779 memset(&iwe, 0, sizeof(iwe));
1780 memset(buf, 0, sizeof(buf));
1781 ptr = buf;
1782 ptr += sprintf(ptr, "extra_ie");
1783 iwe.u.data.length = strlen(buf);
1784
1785 lbs_pr_debug(1, "iwe.u.data.length %d\n",
1786 iwe.u.data.length);
1787 lbs_pr_debug(1, "BUF: %s \n", buf);
1788
1789 iwe.cmd = IWEVCUSTOM;
1790 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1791 current_ev =
1792 iwe_stream_add_point(current_ev, end_buf, &iwe,
1793 buf);
1794 }
1795
1796 current_val = current_ev + IW_EV_LCP_LEN;
1797
1798 /*
1799 * Check if we added any event
1800 */
1801 if ((current_val - current_ev) > IW_EV_LCP_LEN)
1802 current_ev = current_val;
1803 }
1804
1805 dwrq->length = (current_ev - extra);
1806 dwrq->flags = 0;
1807
1808 LEAVE();
1809 return 0;
1810}
1811
1812/**
1813 * @brief Prepare a scan command to be sent to the firmware
1814 *
1815 * Use the wlan_scan_cmd_config sent to the command processing module in
1816 * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1817 * struct to send to firmware.
1818 *
1819 * The fixed fields specifying the BSS type and BSSID filters as well as a
1820 * variable number/length of TLVs are sent in the command to firmware.
1821 *
1822 * @param priv A pointer to wlan_private structure
1823 * @param cmd A pointer to cmd_ds_command structure to be sent to
1824 * firmware with the cmd_DS_801_11_SCAN structure
1825 * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used
1826 * to set the fields/TLVs for the command sent to firmware
1827 *
1828 * @return 0 or -1
1829 *
1830 * @sa wlan_scan_create_channel_list
1831 */
1832int libertas_cmd_80211_scan(wlan_private * priv,
1833 struct cmd_ds_command *cmd, void *pdata_buf)
1834{
1835 struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
1836 struct wlan_scan_cmd_config *pscancfg;
1837
1838 ENTER();
1839
1840 pscancfg = pdata_buf;
1841
1842 /* Set fixed field variables in scan command */
1843 pscan->bsstype = pscancfg->bsstype;
1844 memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
1845 memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
1846
1847 cmd->command = cpu_to_le16(cmd_802_11_scan);
1848
1849 /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1850 cmd->size = cpu_to_le16(sizeof(pscan->bsstype)
1851 + sizeof(pscan->BSSID)
1852 + pscancfg->tlvbufferlen + S_DS_GEN);
1853
1854 lbs_pr_debug(1, "SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
1855 cmd->command, cmd->size, cmd->seqnum);
1856 LEAVE();
1857 return 0;
1858}
1859
1860/**
1861 * @brief This function handles the command response of scan
1862 *
1863 * The response buffer for the scan command has the following
1864 * memory layout:
1865 *
1866 * .-----------------------------------------------------------.
1867 * | header (4 * sizeof(u16)): Standard command response hdr |
1868 * .-----------------------------------------------------------.
1869 * | bufsize (u16) : sizeof the BSS Description data |
1870 * .-----------------------------------------------------------.
1871 * | NumOfSet (u8) : Number of BSS Descs returned |
1872 * .-----------------------------------------------------------.
1873 * | BSSDescription data (variable, size given in bufsize) |
1874 * .-----------------------------------------------------------.
1875 * | TLV data (variable, size calculated using header->size, |
1876 * | bufsize and sizeof the fixed fields above) |
1877 * .-----------------------------------------------------------.
1878 *
1879 * @param priv A pointer to wlan_private structure
1880 * @param resp A pointer to cmd_ds_command
1881 *
1882 * @return 0 or -1
1883 */
1884int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
1885{
1886 wlan_adapter *adapter = priv->adapter;
1887 struct cmd_ds_802_11_scan_rsp *pscan;
1888 struct bss_descriptor newbssentry;
1889 struct mrvlietypes_data *ptlv;
1890 struct mrvlietypes_tsftimestamp *ptsftlv;
1891 u8 *pbssinfo;
1892 u16 scanrespsize;
1893 int bytesleft;
1894 int numintable;
1895 int bssIdx;
1896 int idx;
1897 int tlvbufsize;
1898 u64 tsfval;
1899
1900 ENTER();
1901
1902 pscan = &resp->params.scanresp;
1903
1904 if (pscan->nr_sets > MRVDRV_MAX_BSSID_LIST) {
1905 lbs_pr_debug(1,
1906 "SCAN_RESP: Invalid number of AP returned (%d)!!\n",
1907 pscan->nr_sets);
1908 LEAVE();
1909 return -1;
1910 }
1911
1912 bytesleft = le16_to_cpu(pscan->bssdescriptsize);
1913 lbs_pr_debug(1, "SCAN_RESP: bssdescriptsize %d\n", bytesleft);
1914
1915 scanrespsize = le16_to_cpu(resp->size);
1916 lbs_pr_debug(1, "SCAN_RESP: returned %d AP before parsing\n",
1917 pscan->nr_sets);
1918
1919 numintable = adapter->numinscantable;
1920 pbssinfo = pscan->bssdesc_and_tlvbuffer;
1921
1922 /* The size of the TLV buffer is equal to the entire command response
1923 * size (scanrespsize) minus the fixed fields (sizeof()'s), the
1924 * BSS Descriptions (bssdescriptsize as bytesLef) and the command
1925 * response header (S_DS_GEN)
1926 */
1927 tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
1928 + sizeof(pscan->nr_sets)
1929 + S_DS_GEN);
1930
1931 ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
1932
1933 /* Search the TLV buffer space in the scan response for any valid TLVs */
1934 wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
1935
1936 /*
1937 * Process each scan response returned (pscan->nr_sets). Save
1938 * the information in the newbssentry and then insert into the
1939 * driver scan table either as an update to an existing entry
1940 * or as an addition at the end of the table
1941 */
1942 for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
1943 /* Zero out the newbssentry we are about to store info in */
1944 memset(&newbssentry, 0x00, sizeof(newbssentry));
1945
1946 /* Process the data fields and IEs returned for this BSS */
1947 if ((InterpretBSSDescriptionWithIE(&newbssentry,
1948 &pbssinfo,
1949 &bytesleft) ==
1950 0)
1951 && CHECK_SSID_IS_VALID(&newbssentry.ssid)) {
1952
1953 lbs_pr_debug(1,
1954 "SCAN_RESP: BSSID = %02x:%02x:%02x:%02x:%02x:%02x\n",
1955 newbssentry.macaddress[0],
1956 newbssentry.macaddress[1],
1957 newbssentry.macaddress[2],
1958 newbssentry.macaddress[3],
1959 newbssentry.macaddress[4],
1960 newbssentry.macaddress[5]);
1961
1962 /*
1963 * Search the scan table for the same bssid
1964 */
1965 for (bssIdx = 0; bssIdx < numintable; bssIdx++) {
1966 if (memcmp(newbssentry.macaddress,
1967 adapter->scantable[bssIdx].
1968 macaddress,
1969 sizeof(newbssentry.macaddress)) ==
1970 0) {
1971 /*
1972 * If the SSID matches as well, it is a duplicate of
1973 * this entry. Keep the bssIdx set to this
1974 * entry so we replace the old contents in the table
1975 */
1976 if ((newbssentry.ssid.ssidlength ==
1977 adapter->scantable[bssIdx].ssid.
1978 ssidlength)
1979 &&
1980 (memcmp
1981 (newbssentry.ssid.ssid,
1982 adapter->scantable[bssIdx].ssid.
1983 ssid,
1984 newbssentry.ssid.ssidlength) ==
1985 0)) {
1986 lbs_pr_debug(1,
1987 "SCAN_RESP: Duplicate of index: %d\n",
1988 bssIdx);
1989 break;
1990 }
1991 }
1992 }
1993 /*
1994 * If the bssIdx is equal to the number of entries in the table,
1995 * the new entry was not a duplicate; append it to the scan
1996 * table
1997 */
1998 if (bssIdx == numintable) {
1999 /* Range check the bssIdx, keep it limited to the last entry */
2000 if (bssIdx == MRVDRV_MAX_BSSID_LIST) {
2001 bssIdx--;
2002 } else {
2003 numintable++;
2004 }
2005 }
2006
2007 /*
2008 * If the TSF TLV was appended to the scan results, save the
2009 * this entries TSF value in the networktsf field. The
2010 * networktsf is the firmware's TSF value at the time the
2011 * beacon or probe response was received.
2012 */
2013 if (ptsftlv) {
2014 memcpy(&tsfval, &ptsftlv->tsftable[idx],
2015 sizeof(tsfval));
2016 tsfval = le64_to_cpu(tsfval);
2017
2018 memcpy(&newbssentry.networktsf,
2019 &tsfval, sizeof(newbssentry.networktsf));
2020 }
2021
2022 /* Copy the locally created newbssentry to the scan table */
2023 memcpy(&adapter->scantable[bssIdx],
2024 &newbssentry,
2025 sizeof(adapter->scantable[bssIdx]));
2026
2027 } else {
2028
2029 /* error parsing/interpreting the scan response, skipped */
2030 lbs_pr_debug(1, "SCAN_RESP: "
2031 "InterpretBSSDescriptionWithIE returned ERROR\n");
2032 }
2033 }
2034
2035 lbs_pr_debug(1, "SCAN_RESP: Scanned %2d APs, %d valid, %d total\n",
2036 pscan->nr_sets, numintable - adapter->numinscantable,
2037 numintable);
2038
2039 /* Update the total number of BSSIDs in the scan table */
2040 adapter->numinscantable = numintable;
2041
2042 LEAVE();
2043 return 0;
2044}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 20:25:20 -0500