2 * Functions implementing wlan scan IOCTL and firmware command APIs
4 * IOCTL handlers as well as command preperation and response routines
5 * for sending scan commands to the firmware.
7 #include <linux/ctype.h>
9 #include <linux/netdevice.h>
10 #include <linux/wireless.h>
11 #include <linux/etherdevice.h>
13 #include <net/ieee80211.h>
14 #include <net/iw_handler.h>
21 //! Approximate amount of data needed to pass a scan result back to iwlist
22 #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
29 + 40) /* 40 for WPAIE */
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)))
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))
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) \
45 //! The maximum number of channels the firmware can scan per command
46 #define MRVDRV_MAX_CHANNELS_PER_SCAN 14
49 * @brief Number of channels to scan per firmware scan command issuance.
51 * Number restricted to prevent hitting the limit on the amount of scan data
52 * returned in a single firmware scan command.
54 #define MRVDRV_CHANNELS_PER_SCAN_CMD 4
56 //! Scan time specified in the channel TLV for each channel for passive scans
57 #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
59 //! Scan time specified in the channel TLV for each channel for active scans
60 #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
62 static const u8 zeromac
[ETH_ALEN
] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
63 static const u8 bcastmac
[ETH_ALEN
] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
65 static inline void clear_bss_descriptor (struct bss_descriptor
* bss
)
67 /* Don't blow away ->list, just BSS data */
68 memset(bss
, 0, offsetof(struct bss_descriptor
, list
));
71 static inline int match_bss_no_security(struct wlan_802_11_security
* secinfo
,
72 struct bss_descriptor
* match_bss
)
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
79 && !match_bss
->privacy
) {
85 static inline int match_bss_static_wep(struct wlan_802_11_security
* secinfo
,
86 struct bss_descriptor
* match_bss
)
88 if ( secinfo
->wep_enabled
89 && !secinfo
->WPAenabled
90 && !secinfo
->WPA2enabled
91 && match_bss
->privacy
) {
97 static inline int match_bss_wpa(struct wlan_802_11_security
* secinfo
,
98 struct bss_descriptor
* match_bss
)
100 if ( !secinfo
->wep_enabled
101 && secinfo
->WPAenabled
102 && (match_bss
->wpa_ie
[0] == WPA_IE
)
103 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
111 static inline int match_bss_wpa2(struct wlan_802_11_security
* secinfo
,
112 struct bss_descriptor
* match_bss
)
114 if ( !secinfo
->wep_enabled
115 && secinfo
->WPA2enabled
116 && (match_bss
->rsn_ie
[0] == WPA2_IE
)
117 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
125 static inline int match_bss_dynamic_wep(struct wlan_802_11_security
* secinfo
,
126 struct bss_descriptor
* match_bss
)
128 if ( !secinfo
->wep_enabled
129 && !secinfo
->WPAenabled
130 && !secinfo
->WPA2enabled
131 && (match_bss
->wpa_ie
[0] != WPA_IE
)
132 && (match_bss
->rsn_ie
[0] != WPA2_IE
)
133 && match_bss
->privacy
) {
140 * @brief Check if a scanned network compatible with the driver settings
142 * WEP WPA WPA2 ad-hoc encrypt Network
143 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
144 * 0 0 0 0 NONE 0 0 0 yes No security
145 * 1 0 0 0 NONE 1 0 0 yes Static WEP
146 * 0 1 0 0 x 1x 1 x yes WPA
147 * 0 0 1 0 x 1x x 1 yes WPA2
148 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
149 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
152 * @param adapter A pointer to wlan_adapter
153 * @param index Index in scantable to check against current driver settings
154 * @param mode Network mode: Infrastructure or IBSS
156 * @return Index in scantable, or error code if negative
158 static int is_network_compatible(wlan_adapter
* adapter
,
159 struct bss_descriptor
* bss
, u8 mode
)
163 lbs_deb_enter(LBS_DEB_ASSOC
);
165 if (bss
->mode
!= mode
)
168 if ((matched
= match_bss_no_security(&adapter
->secinfo
, bss
))) {
170 } else if ((matched
= match_bss_static_wep(&adapter
->secinfo
, bss
))) {
172 } else if ((matched
= match_bss_wpa(&adapter
->secinfo
, bss
))) {
174 "is_network_compatible() WPA: wpa_ie=%#x "
175 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
176 "privacy=%#x\n", bss
->wpa_ie
[0], bss
->rsn_ie
[0],
177 adapter
->secinfo
.wep_enabled
? "e" : "d",
178 adapter
->secinfo
.WPAenabled
? "e" : "d",
179 adapter
->secinfo
.WPA2enabled
? "e" : "d",
182 } else if ((matched
= match_bss_wpa2(&adapter
->secinfo
, bss
))) {
184 "is_network_compatible() WPA2: wpa_ie=%#x "
185 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
186 "privacy=%#x\n", bss
->wpa_ie
[0], bss
->rsn_ie
[0],
187 adapter
->secinfo
.wep_enabled
? "e" : "d",
188 adapter
->secinfo
.WPAenabled
? "e" : "d",
189 adapter
->secinfo
.WPA2enabled
? "e" : "d",
192 } else if ((matched
= match_bss_dynamic_wep(&adapter
->secinfo
, bss
))) {
194 "is_network_compatible() dynamic WEP: "
195 "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
202 /* bss security settings don't match those configured on card */
204 "is_network_compatible() FAILED: wpa_ie=%#x "
205 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
206 bss
->wpa_ie
[0], bss
->rsn_ie
[0],
207 adapter
->secinfo
.wep_enabled
? "e" : "d",
208 adapter
->secinfo
.WPAenabled
? "e" : "d",
209 adapter
->secinfo
.WPA2enabled
? "e" : "d",
213 lbs_deb_leave(LBS_DEB_SCAN
);
218 * @brief Post process the scan table after a new scan command has completed
220 * Inspect each entry of the scan table and try to find an entry that
221 * matches our current associated/joined network from the scan. If
222 * one is found, update the stored copy of the bssdescriptor for our
225 * Debug dump the current scan table contents if compiled accordingly.
227 * @param priv A pointer to wlan_private structure
231 static void wlan_scan_process_results(wlan_private
* priv
)
233 wlan_adapter
*adapter
= priv
->adapter
;
234 struct bss_descriptor
* iter_bss
;
236 if (adapter
->connect_status
== libertas_connected
)
239 mutex_lock(&adapter
->lock
);
240 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
241 lbs_deb_scan("Scan:(%02d) " MAC_FMT
", RSSI[%03d], SSID[%s]\n",
242 i
++, MAC_ARG(iter_bss
->bssid
), (s32
) iter_bss
->rssi
,
243 iter_bss
->ssid
.ssid
);
245 mutex_unlock(&adapter
->lock
);
249 * @brief Create a channel list for the driver to scan based on region info
251 * Use the driver region/band information to construct a comprehensive list
252 * of channels to scan. This routine is used for any scan that is not
253 * provided a specific channel list to scan.
255 * @param priv A pointer to wlan_private structure
256 * @param scanchanlist Output parameter: resulting channel list to scan
257 * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
258 * is being sent in the command to firmware. Used to
259 * increase the number of channels sent in a scan
260 * command and to disable the firmware channel scan
265 static void wlan_scan_create_channel_list(wlan_private
* priv
,
266 struct chanscanparamset
* scanchanlist
,
270 wlan_adapter
*adapter
= priv
->adapter
;
271 struct region_channel
*scanregion
;
272 struct chan_freq_power
*cfp
;
280 /* Set the default scan type to the user specified type, will later
281 * be changed to passive on a per channel basis if restricted by
282 * regulatory requirements (11d or 11h)
284 scantype
= adapter
->scantype
;
286 for (rgnidx
= 0; rgnidx
< ARRAY_SIZE(adapter
->region_channel
); rgnidx
++) {
287 if (priv
->adapter
->enable11d
&&
288 adapter
->connect_status
!= libertas_connected
) {
289 /* Scan all the supported chan for the first scan */
290 if (!adapter
->universal_channel
[rgnidx
].valid
)
292 scanregion
= &adapter
->universal_channel
[rgnidx
];
294 /* clear the parsed_region_chan for the first scan */
295 memset(&adapter
->parsed_region_chan
, 0x00,
296 sizeof(adapter
->parsed_region_chan
));
298 if (!adapter
->region_channel
[rgnidx
].valid
)
300 scanregion
= &adapter
->region_channel
[rgnidx
];
304 nextchan
< scanregion
->nrcfp
; nextchan
++, chanidx
++) {
306 cfp
= scanregion
->CFP
+ nextchan
;
308 if (priv
->adapter
->enable11d
) {
310 libertas_get_scan_type_11d(cfp
->channel
,
315 switch (scanregion
->band
) {
319 scanchanlist
[chanidx
].radiotype
=
320 cmd_scan_radio_type_bg
;
324 if (scantype
== cmd_scan_type_passive
) {
325 scanchanlist
[chanidx
].maxscantime
=
326 cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME
);
327 scanchanlist
[chanidx
].chanscanmode
.passivescan
=
330 scanchanlist
[chanidx
].maxscantime
=
331 cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME
);
332 scanchanlist
[chanidx
].chanscanmode
.passivescan
=
336 scanchanlist
[chanidx
].channumber
= cfp
->channel
;
339 scanchanlist
[chanidx
].chanscanmode
.
347 * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
349 * Application layer or other functions can invoke wlan_scan_networks
350 * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
351 * This structure is used as the basis of one or many wlan_scan_cmd_config
352 * commands that are sent to the command processing module and sent to
355 * Create a wlan_scan_cmd_config based on the following user supplied
356 * parameters (if present):
359 * - Number of Probes to be sent
362 * If the SSID or BSSID filter is not present, disable/clear the filter.
363 * If the number of probes is not set, use the adapter default setting
364 * Qualify the channel
366 * @param priv A pointer to wlan_private structure
367 * @param puserscanin NULL or pointer to scan configuration parameters
368 * @param ppchantlvout Output parameter: Pointer to the start of the
369 * channel TLV portion of the output scan config
370 * @param pscanchanlist Output parameter: Pointer to the resulting channel
372 * @param pmaxchanperscan Output parameter: Number of channels to scan for
373 * each issuance of the firmware scan command
374 * @param pfilteredscan Output parameter: Flag indicating whether or not
375 * a BSSID or SSID filter is being sent in the
376 * command to firmware. Used to increase the number
377 * of channels sent in a scan command and to
378 * disable the firmware channel scan filter.
379 * @param pscancurrentonly Output parameter: Flag indicating whether or not
380 * we are only scanning our current active channel
382 * @return resulting scan configuration
384 static struct wlan_scan_cmd_config
*
385 wlan_scan_setup_scan_config(wlan_private
* priv
,
386 const struct wlan_ioctl_user_scan_cfg
* puserscanin
,
387 struct mrvlietypes_chanlistparamset
** ppchantlvout
,
388 struct chanscanparamset
* pscanchanlist
,
389 int *pmaxchanperscan
,
391 u8
* pscancurrentonly
)
393 wlan_adapter
*adapter
= priv
->adapter
;
394 struct mrvlietypes_numprobes
*pnumprobestlv
;
395 struct mrvlietypes_ssidparamset
*pssidtlv
;
396 struct wlan_scan_cmd_config
* pscancfgout
= NULL
;
405 pscancfgout
= kzalloc(MAX_SCAN_CFG_ALLOC
, GFP_KERNEL
);
406 if (pscancfgout
== NULL
)
409 /* The tlvbufferlen is calculated for each scan command. The TLVs added
410 * in this routine will be preserved since the routine that sends
411 * the command will append channelTLVs at *ppchantlvout. The difference
412 * between the *ppchantlvout and the tlvbuffer start will be used
413 * to calculate the size of anything we add in this routine.
415 pscancfgout
->tlvbufferlen
= 0;
417 /* Running tlv pointer. Assigned to ppchantlvout at end of function
418 * so later routines know where channels can be added to the command buf
420 ptlvpos
= pscancfgout
->tlvbuffer
;
423 * Set the initial scan paramters for progressive scanning. If a specific
424 * BSSID or SSID is used, the number of channels in the scan command
425 * will be increased to the absolute maximum
427 *pmaxchanperscan
= MRVDRV_CHANNELS_PER_SCAN_CMD
;
429 /* Initialize the scan as un-filtered by firmware, set to TRUE below if
430 * a SSID or BSSID filter is sent in the command
434 /* Initialize the scan as not being only on the current channel. If
435 * the channel list is customized, only contains one channel, and
436 * is the active channel, this is set true and data flow is not halted.
438 *pscancurrentonly
= 0;
442 /* Set the bss type scan filter, use adapter setting if unset */
443 pscancfgout
->bsstype
=
444 (puserscanin
->bsstype
? puserscanin
->bsstype
: adapter
->
447 /* Set the number of probes to send, use adapter setting if unset */
448 numprobes
= (puserscanin
->numprobes
? puserscanin
->numprobes
:
449 adapter
->scanprobes
);
452 * Set the BSSID filter to the incoming configuration,
453 * if non-zero. If not set, it will remain disabled (all zeros).
455 memcpy(pscancfgout
->bssid
, puserscanin
->bssid
,
456 sizeof(pscancfgout
->bssid
));
458 if (puserscanin
->ssid_len
) {
460 (struct mrvlietypes_ssidparamset
*) pscancfgout
->
462 pssidtlv
->header
.type
= cpu_to_le16(TLV_TYPE_SSID
);
463 pssidtlv
->header
.len
= cpu_to_le16(puserscanin
->ssid_len
);
464 memcpy(pssidtlv
->ssid
, puserscanin
->ssid
,
465 puserscanin
->ssid_len
);
466 ptlvpos
+= sizeof(pssidtlv
->header
) + puserscanin
->ssid_len
;
470 * The default number of channels sent in the command is low to
471 * ensure the response buffer from the firmware does not truncate
472 * scan results. That is not an issue with an SSID or BSSID
473 * filter applied to the scan results in the firmware.
475 if ( puserscanin
->ssid_len
476 || (compare_ether_addr(pscancfgout
->bssid
, &zeromac
[0]) != 0)) {
477 *pmaxchanperscan
= MRVDRV_MAX_CHANNELS_PER_SCAN
;
481 pscancfgout
->bsstype
= adapter
->scanmode
;
482 numprobes
= adapter
->scanprobes
;
485 /* If the input config or adapter has the number of Probes set, add tlv */
487 pnumprobestlv
= (struct mrvlietypes_numprobes
*) ptlvpos
;
488 pnumprobestlv
->header
.type
= cpu_to_le16(TLV_TYPE_NUMPROBES
);
489 pnumprobestlv
->header
.len
= cpu_to_le16(2);
490 pnumprobestlv
->numprobes
= cpu_to_le16(numprobes
);
492 ptlvpos
+= sizeof(*pnumprobestlv
);
496 * Set the output for the channel TLV to the address in the tlv buffer
497 * past any TLVs that were added in this fuction (SSID, numprobes).
498 * channel TLVs will be added past this for each scan command, preserving
499 * the TLVs that were previously added.
501 *ppchantlvout
= (struct mrvlietypes_chanlistparamset
*) ptlvpos
;
503 if (puserscanin
&& puserscanin
->chanlist
[0].channumber
) {
505 lbs_deb_scan("Scan: Using supplied channel list\n");
508 chanidx
< WLAN_IOCTL_USER_SCAN_CHAN_MAX
509 && puserscanin
->chanlist
[chanidx
].channumber
; chanidx
++) {
511 channel
= puserscanin
->chanlist
[chanidx
].channumber
;
512 (pscanchanlist
+ chanidx
)->channumber
= channel
;
514 radiotype
= puserscanin
->chanlist
[chanidx
].radiotype
;
515 (pscanchanlist
+ chanidx
)->radiotype
= radiotype
;
517 scantype
= puserscanin
->chanlist
[chanidx
].scantype
;
519 if (scantype
== cmd_scan_type_passive
) {
521 chanidx
)->chanscanmode
.passivescan
= 1;
524 chanidx
)->chanscanmode
.passivescan
= 0;
527 if (puserscanin
->chanlist
[chanidx
].scantime
) {
529 puserscanin
->chanlist
[chanidx
].scantime
;
531 if (scantype
== cmd_scan_type_passive
) {
532 scandur
= MRVDRV_PASSIVE_SCAN_CHAN_TIME
;
534 scandur
= MRVDRV_ACTIVE_SCAN_CHAN_TIME
;
538 (pscanchanlist
+ chanidx
)->minscantime
=
539 cpu_to_le16(scandur
);
540 (pscanchanlist
+ chanidx
)->maxscantime
=
541 cpu_to_le16(scandur
);
544 /* Check if we are only scanning the current channel */
545 if ((chanidx
== 1) && (puserscanin
->chanlist
[0].channumber
547 priv
->adapter
->curbssparams
.channel
)) {
548 *pscancurrentonly
= 1;
549 lbs_deb_scan("Scan: Scanning current channel only");
553 lbs_deb_scan("Scan: Creating full region channel list\n");
554 wlan_scan_create_channel_list(priv
, pscanchanlist
,
563 * @brief Construct and send multiple scan config commands to the firmware
565 * Previous routines have created a wlan_scan_cmd_config with any requested
566 * TLVs. This function splits the channel TLV into maxchanperscan lists
567 * and sends the portion of the channel TLV along with the other TLVs
568 * to the wlan_cmd routines for execution in the firmware.
570 * @param priv A pointer to wlan_private structure
571 * @param maxchanperscan Maximum number channels to be included in each
572 * scan command sent to firmware
573 * @param filteredscan Flag indicating whether or not a BSSID or SSID
574 * filter is being used for the firmware command
575 * scan command sent to firmware
576 * @param pscancfgout Scan configuration used for this scan.
577 * @param pchantlvout Pointer in the pscancfgout where the channel TLV
578 * should start. This is past any other TLVs that
579 * must be sent down in each firmware command.
580 * @param pscanchanlist List of channels to scan in maxchanperscan segments
582 * @return 0 or error return otherwise
584 static int wlan_scan_channel_list(wlan_private
* priv
,
587 struct wlan_scan_cmd_config
* pscancfgout
,
588 struct mrvlietypes_chanlistparamset
* pchantlvout
,
589 struct chanscanparamset
* pscanchanlist
,
590 const struct wlan_ioctl_user_scan_cfg
* puserscanin
,
593 struct chanscanparamset
*ptmpchan
;
594 struct chanscanparamset
*pstartchan
;
600 union iwreq_data wrqu
;
602 lbs_deb_enter(LBS_DEB_ASSOC
);
604 if (pscancfgout
== 0 || pchantlvout
== 0 || pscanchanlist
== 0) {
605 lbs_deb_scan("Scan: Null detect: %p, %p, %p\n",
606 pscancfgout
, pchantlvout
, pscanchanlist
);
610 pchantlvout
->header
.type
= cpu_to_le16(TLV_TYPE_CHANLIST
);
612 /* Set the temp channel struct pointer to the start of the desired list */
613 ptmpchan
= pscanchanlist
;
615 if (priv
->adapter
->last_scanned_channel
&& !puserscanin
)
616 ptmpchan
+= priv
->adapter
->last_scanned_channel
;
618 /* Loop through the desired channel list, sending a new firmware scan
619 * commands for each maxchanperscan channels (or for 1,6,11 individually
620 * if configured accordingly)
622 while (ptmpchan
->channumber
) {
625 pchantlvout
->header
.len
= 0;
626 scanband
= ptmpchan
->radiotype
;
627 pstartchan
= ptmpchan
;
630 /* Construct the channel TLV for the scan command. Continue to
631 * insert channel TLVs until:
632 * - the tlvidx hits the maximum configured per scan command
633 * - the next channel to insert is 0 (end of desired channel list)
634 * - doneearly is set (controlling individual scanning of 1,6,11)
636 while (tlvidx
< maxchanperscan
&& ptmpchan
->channumber
637 && !doneearly
&& scanned
< 2) {
640 "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
641 ptmpchan
->channumber
, ptmpchan
->radiotype
,
642 ptmpchan
->chanscanmode
.passivescan
,
643 ptmpchan
->chanscanmode
.disablechanfilt
,
644 ptmpchan
->maxscantime
);
646 /* Copy the current channel TLV to the command being prepared */
647 memcpy(pchantlvout
->chanscanparam
+ tlvidx
,
648 ptmpchan
, sizeof(pchantlvout
->chanscanparam
));
650 /* Increment the TLV header length by the size appended */
651 /* Ew, it would be _so_ nice if we could just declare the
652 variable little-endian and let GCC handle it for us */
653 pchantlvout
->header
.len
=
654 cpu_to_le16(le16_to_cpu(pchantlvout
->header
.len
) +
655 sizeof(pchantlvout
->chanscanparam
));
658 * The tlv buffer length is set to the number of bytes of the
659 * between the channel tlv pointer and the start of the
660 * tlv buffer. This compensates for any TLVs that were appended
661 * before the channel list.
663 pscancfgout
->tlvbufferlen
= ((u8
*) pchantlvout
664 - pscancfgout
->tlvbuffer
);
666 /* Add the size of the channel tlv header and the data length */
667 pscancfgout
->tlvbufferlen
+=
668 (sizeof(pchantlvout
->header
)
669 + le16_to_cpu(pchantlvout
->header
.len
));
671 /* Increment the index to the channel tlv we are constructing */
676 /* Stop the loop if the *current* channel is in the 1,6,11 set
677 * and we are not filtering on a BSSID or SSID.
679 if (!filteredscan
&& (ptmpchan
->channumber
== 1
680 || ptmpchan
->channumber
== 6
681 || ptmpchan
->channumber
== 11)) {
685 /* Increment the tmp pointer to the next channel to be scanned */
689 /* Stop the loop if the *next* channel is in the 1,6,11 set.
690 * This will cause it to be the only channel scanned on the next
693 if (!filteredscan
&& (ptmpchan
->channumber
== 1
694 || ptmpchan
->channumber
== 6
695 || ptmpchan
->channumber
== 11)) {
700 /* Send the scan command to the firmware with the specified cfg */
701 ret
= libertas_prepare_and_send_command(priv
, cmd_802_11_scan
, 0,
703 if (scanned
>= 2 && !full_scan
) {
711 priv
->adapter
->last_scanned_channel
= ptmpchan
->channumber
;
713 /* Tell userspace the scan table has been updated */
714 memset(&wrqu
, 0, sizeof(union iwreq_data
));
715 wireless_send_event(priv
->dev
, SIOCGIWSCAN
, &wrqu
, NULL
);
717 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
722 clear_selected_scan_list_entries(wlan_adapter
* adapter
,
723 const struct wlan_ioctl_user_scan_cfg
* scan_cfg
)
725 struct bss_descriptor
* bss
;
726 struct bss_descriptor
* safe
;
727 u32 clear_ssid_flag
= 0, clear_bssid_flag
= 0;
732 if (scan_cfg
->clear_ssid
&& scan_cfg
->ssid_len
)
735 if (scan_cfg
->clear_bssid
736 && (compare_ether_addr(scan_cfg
->bssid
, &zeromac
[0]) != 0)
737 && (compare_ether_addr(scan_cfg
->bssid
, &bcastmac
[0]) != 0)) {
738 clear_bssid_flag
= 1;
741 if (!clear_ssid_flag
&& !clear_bssid_flag
)
744 mutex_lock(&adapter
->lock
);
745 list_for_each_entry_safe (bss
, safe
, &adapter
->network_list
, list
) {
748 /* Check for an SSID match */
750 && (bss
->ssid
.ssidlength
== scan_cfg
->ssid_len
)
751 && !memcmp(bss
->ssid
.ssid
, scan_cfg
->ssid
, bss
->ssid
.ssidlength
))
754 /* Check for a BSSID match */
755 if ( clear_bssid_flag
756 && !compare_ether_addr(bss
->bssid
, scan_cfg
->bssid
))
760 list_move_tail (&bss
->list
, &adapter
->network_free_list
);
761 clear_bss_descriptor(bss
);
764 mutex_unlock(&adapter
->lock
);
769 * @brief Internal function used to start a scan based on an input config
771 * Use the input user scan configuration information when provided in
772 * order to send the appropriate scan commands to firmware to populate or
773 * update the internal driver scan table
775 * @param priv A pointer to wlan_private structure
776 * @param puserscanin Pointer to the input configuration for the requested
779 * @return 0 or < 0 if error
781 int wlan_scan_networks(wlan_private
* priv
,
782 const struct wlan_ioctl_user_scan_cfg
* puserscanin
,
785 wlan_adapter
* adapter
= priv
->adapter
;
786 struct mrvlietypes_chanlistparamset
*pchantlvout
;
787 struct chanscanparamset
* scan_chan_list
= NULL
;
788 struct wlan_scan_cmd_config
* scan_cfg
= NULL
;
790 u8 scancurrentchanonly
;
794 lbs_deb_enter(LBS_DEB_ASSOC
);
796 scan_chan_list
= kzalloc(sizeof(struct chanscanparamset
) *
797 WLAN_IOCTL_USER_SCAN_CHAN_MAX
, GFP_KERNEL
);
798 if (scan_chan_list
== NULL
) {
803 scan_cfg
= wlan_scan_setup_scan_config(priv
,
809 &scancurrentchanonly
);
810 if (scan_cfg
== NULL
) {
815 clear_selected_scan_list_entries(adapter
, puserscanin
);
817 /* Keep the data path active if we are only scanning our current channel */
818 if (!scancurrentchanonly
) {
819 netif_stop_queue(priv
->dev
);
820 netif_carrier_off(priv
->dev
);
821 netif_stop_queue(priv
->mesh_dev
);
822 netif_carrier_off(priv
->mesh_dev
);
825 ret
= wlan_scan_channel_list(priv
,
834 /* Process the resulting scan table:
835 * - Remove any bad ssids
836 * - Update our current BSS information from scan data
838 wlan_scan_process_results(priv
);
840 if (priv
->adapter
->connect_status
== libertas_connected
) {
841 netif_carrier_on(priv
->dev
);
842 netif_wake_queue(priv
->dev
);
843 netif_carrier_on(priv
->mesh_dev
);
844 netif_wake_queue(priv
->mesh_dev
);
852 kfree(scan_chan_list
);
854 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
859 * @brief Inspect the scan response buffer for pointers to expected TLVs
861 * TLVs can be included at the end of the scan response BSS information.
862 * Parse the data in the buffer for pointers to TLVs that can potentially
863 * be passed back in the response
865 * @param ptlv Pointer to the start of the TLV buffer to parse
866 * @param tlvbufsize size of the TLV buffer
867 * @param ptsftlv Output parameter: Pointer to the TSF TLV if found
872 void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data
* ptlv
,
874 struct mrvlietypes_tsftimestamp
** ptsftlv
)
876 struct mrvlietypes_data
*pcurrenttlv
;
882 tlvbufleft
= tlvbufsize
;
885 lbs_deb_scan("SCAN_RESP: tlvbufsize = %d\n", tlvbufsize
);
886 lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8
*) ptlv
, tlvbufsize
);
888 while (tlvbufleft
>= sizeof(struct mrvlietypesheader
)) {
889 tlvtype
= le16_to_cpu(pcurrenttlv
->header
.type
);
890 tlvlen
= le16_to_cpu(pcurrenttlv
->header
.len
);
893 case TLV_TYPE_TSFTIMESTAMP
:
894 *ptsftlv
= (struct mrvlietypes_tsftimestamp
*) pcurrenttlv
;
898 lbs_deb_scan("SCAN_RESP: Unhandled TLV = %d\n",
900 /* Give up, this seems corrupted */
904 tlvbufleft
-= (sizeof(ptlv
->header
) + tlvlen
);
906 (struct mrvlietypes_data
*) (pcurrenttlv
->Data
+ tlvlen
);
911 * @brief Interpret a BSS scan response returned from the firmware
913 * Parse the various fixed fields and IEs passed back for a a BSS probe
914 * response or beacon from the scan command. Record information as needed
915 * in the scan table struct bss_descriptor for that entry.
917 * @param bss Output parameter: Pointer to the BSS Entry
921 static int libertas_process_bss(struct bss_descriptor
* bss
,
922 u8
** pbeaconinfo
, int *bytesleft
)
924 enum ieeetypes_elementid elemID
;
925 struct ieeetypes_fhparamset
*pFH
;
926 struct ieeetypes_dsparamset
*pDS
;
927 struct ieeetypes_cfparamset
*pCF
;
928 struct ieeetypes_ibssparamset
*pibss
;
929 struct ieeetypes_capinfo
*pcap
;
930 struct WLAN_802_11_FIXED_IEs fixedie
;
938 int bytesleftforcurrentbeacon
;
942 const u8 oui01
[4] = { 0x00, 0x50, 0xf2, 0x01 };
944 struct ieeetypes_countryinfoset
*pcountryinfo
;
946 lbs_deb_enter(LBS_DEB_ASSOC
);
952 if (*bytesleft
>= sizeof(beaconsize
)) {
953 /* Extract & convert beacon size from the command buffer */
954 beaconsize
= le16_to_cpup((void *)*pbeaconinfo
);
955 *bytesleft
-= sizeof(beaconsize
);
956 *pbeaconinfo
+= sizeof(beaconsize
);
959 if (beaconsize
== 0 || beaconsize
> *bytesleft
) {
961 *pbeaconinfo
+= *bytesleft
;
967 /* Initialize the current working beacon pointer for this BSS iteration */
968 pcurrentptr
= *pbeaconinfo
;
970 /* Advance the return beacon pointer past the current beacon */
971 *pbeaconinfo
+= beaconsize
;
972 *bytesleft
-= beaconsize
;
974 bytesleftforcurrentbeacon
= beaconsize
;
976 memcpy(bss
->bssid
, pcurrentptr
, ETH_ALEN
);
977 lbs_deb_scan("process_bss: AP BSSID " MAC_FMT
"\n", MAC_ARG(bss
->bssid
));
979 pcurrentptr
+= ETH_ALEN
;
980 bytesleftforcurrentbeacon
-= ETH_ALEN
;
982 if (bytesleftforcurrentbeacon
< 12) {
983 lbs_deb_scan("process_bss: Not enough bytes left\n");
988 * next 4 fields are RSSI, time stamp, beacon interval,
989 * and capability information
992 /* RSSI is 1 byte long */
993 bss
->rssi
= *pcurrentptr
;
994 lbs_deb_scan("process_bss: RSSI=%02X\n", *pcurrentptr
);
996 bytesleftforcurrentbeacon
-= 1;
998 /* time stamp is 8 bytes long */
999 fixedie
.timestamp
= bss
->timestamp
= le64_to_cpup((void *)pcurrentptr
);
1001 bytesleftforcurrentbeacon
-= 8;
1003 /* beacon interval is 2 bytes long */
1004 fixedie
.beaconinterval
= bss
->beaconperiod
= le16_to_cpup((void *)pcurrentptr
);
1006 bytesleftforcurrentbeacon
-= 2;
1008 /* capability information is 2 bytes long */
1009 memcpy(&fixedie
.capabilities
, pcurrentptr
, 2);
1010 lbs_deb_scan("process_bss: fixedie.capabilities=0x%X\n",
1011 fixedie
.capabilities
);
1012 pcap
= (struct ieeetypes_capinfo
*) & fixedie
.capabilities
;
1013 memcpy(&bss
->cap
, pcap
, sizeof(struct ieeetypes_capinfo
));
1015 bytesleftforcurrentbeacon
-= 2;
1017 /* rest of the current buffer are IE's */
1018 lbs_deb_scan("process_bss: IE length for this AP = %d\n",
1019 bytesleftforcurrentbeacon
);
1021 lbs_dbg_hex("process_bss: IE info", (u8
*) pcurrentptr
,
1022 bytesleftforcurrentbeacon
);
1024 if (pcap
->privacy
) {
1025 lbs_deb_scan("process_bss: AP WEP enabled\n");
1026 bss
->privacy
= wlan802_11privfilter8021xWEP
;
1028 bss
->privacy
= wlan802_11privfilteracceptall
;
1031 if (pcap
->ibss
== 1) {
1032 bss
->mode
= IW_MODE_ADHOC
;
1034 bss
->mode
= IW_MODE_INFRA
;
1037 /* process variable IE */
1038 while (bytesleftforcurrentbeacon
>= 2) {
1039 elemID
= (enum ieeetypes_elementid
) (*((u8
*) pcurrentptr
));
1040 elemlen
= *((u8
*) pcurrentptr
+ 1);
1042 if (bytesleftforcurrentbeacon
< elemlen
) {
1043 lbs_deb_scan("process_bss: error in processing IE, "
1044 "bytes left < IE length\n");
1045 bytesleftforcurrentbeacon
= 0;
1051 bss
->ssid
.ssidlength
= elemlen
;
1052 memcpy(bss
->ssid
.ssid
, (pcurrentptr
+ 2), elemlen
);
1053 lbs_deb_scan("ssid '%s'\n", bss
->ssid
.ssid
);
1056 case SUPPORTED_RATES
:
1057 memcpy(bss
->datarates
, (pcurrentptr
+ 2), elemlen
);
1058 memmove(bss
->libertas_supported_rates
, (pcurrentptr
+ 2),
1061 founddatarateie
= 1;
1065 lbs_deb_scan("process_bss: EXTRA_IE Found!\n");
1069 pFH
= (struct ieeetypes_fhparamset
*) pcurrentptr
;
1070 memmove(&bss
->phyparamset
.fhparamset
, pFH
,
1071 sizeof(struct ieeetypes_fhparamset
));
1072 #if 0 /* I think we can store these LE */
1073 bss
->phyparamset
.fhparamset
.dwelltime
1074 = le16_to_cpu(bss
->phyparamset
.fhparamset
.dwelltime
);
1079 pDS
= (struct ieeetypes_dsparamset
*) pcurrentptr
;
1080 bss
->channel
= pDS
->currentchan
;
1081 memcpy(&bss
->phyparamset
.dsparamset
, pDS
,
1082 sizeof(struct ieeetypes_dsparamset
));
1086 pCF
= (struct ieeetypes_cfparamset
*) pcurrentptr
;
1087 memcpy(&bss
->ssparamset
.cfparamset
, pCF
,
1088 sizeof(struct ieeetypes_cfparamset
));
1091 case IBSS_PARAM_SET
:
1092 pibss
= (struct ieeetypes_ibssparamset
*) pcurrentptr
;
1093 bss
->atimwindow
= le32_to_cpu(pibss
->atimwindow
);
1094 memmove(&bss
->ssparamset
.ibssparamset
, pibss
,
1095 sizeof(struct ieeetypes_ibssparamset
));
1097 bss
->ssparamset
.ibssparamset
.atimwindow
1098 = le16_to_cpu(bss
->ssparamset
.ibssparamset
.atimwindow
);
1102 /* Handle Country Info IE */
1104 pcountryinfo
= (struct ieeetypes_countryinfoset
*) pcurrentptr
;
1105 if (pcountryinfo
->len
< sizeof(pcountryinfo
->countrycode
)
1106 || pcountryinfo
->len
> 254) {
1107 lbs_deb_scan("process_bss: 11D- Err "
1108 "CountryInfo len =%d min=%zd max=254\n",
1110 sizeof(pcountryinfo
->countrycode
));
1115 memcpy(&bss
->countryinfo
,
1116 pcountryinfo
, pcountryinfo
->len
+ 2);
1117 lbs_dbg_hex("process_bss: 11D- CountryInfo:",
1118 (u8
*) pcountryinfo
,
1119 (u32
) (pcountryinfo
->len
+ 2));
1122 case EXTENDED_SUPPORTED_RATES
:
1124 * only process extended supported rate
1125 * if data rate is already found.
1126 * data rate IE should come before
1127 * extended supported rate IE
1129 if (founddatarateie
) {
1130 if ((elemlen
+ ratesize
) > WLAN_SUPPORTED_RATES
) {
1132 (WLAN_SUPPORTED_RATES
- ratesize
);
1134 bytestocopy
= elemlen
;
1137 pRate
= (u8
*) bss
->datarates
;
1139 memmove(pRate
, (pcurrentptr
+ 2), bytestocopy
);
1140 pRate
= (u8
*) bss
->libertas_supported_rates
;
1142 memmove(pRate
, (pcurrentptr
+ 2), bytestocopy
);
1146 case VENDOR_SPECIFIC_221
:
1147 #define IE_ID_LEN_FIELDS_BYTES 2
1148 pIe
= (struct IE_WPA
*)pcurrentptr
;
1150 if (memcmp(pIe
->oui
, oui01
, sizeof(oui01
)))
1153 bss
->wpa_ie_len
= min(elemlen
+ IE_ID_LEN_FIELDS_BYTES
,
1155 memcpy(bss
->wpa_ie
, pcurrentptr
, bss
->wpa_ie_len
);
1156 lbs_dbg_hex("process_bss: WPA IE", bss
->wpa_ie
, elemlen
);
1159 pIe
= (struct IE_WPA
*)pcurrentptr
;
1160 bss
->rsn_ie_len
= min(elemlen
+ IE_ID_LEN_FIELDS_BYTES
,
1162 memcpy(bss
->rsn_ie
, pcurrentptr
, bss
->rsn_ie_len
);
1163 lbs_dbg_hex("process_bss: RSN_IE", bss
->rsn_ie
, elemlen
);
1168 case CHALLENGE_TEXT
:
1172 pcurrentptr
+= elemlen
+ 2;
1174 /* need to account for IE ID and IE len */
1175 bytesleftforcurrentbeacon
-= (elemlen
+ 2);
1177 } /* while (bytesleftforcurrentbeacon > 2) */
1180 bss
->last_scanned
= jiffies
;
1185 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
1190 * @brief Compare two SSIDs
1192 * @param ssid1 A pointer to ssid to compare
1193 * @param ssid2 A pointer to ssid to compare
1195 * @return 0--ssid is same, otherwise is different
1197 int libertas_SSID_cmp(struct WLAN_802_11_SSID
*ssid1
, struct WLAN_802_11_SSID
*ssid2
)
1199 if (!ssid1
|| !ssid2
)
1202 if (ssid1
->ssidlength
!= ssid2
->ssidlength
)
1205 return memcmp(ssid1
->ssid
, ssid2
->ssid
, ssid1
->ssidlength
);
1209 * @brief This function finds a specific compatible BSSID in the scan list
1211 * @param adapter A pointer to wlan_adapter
1212 * @param bssid BSSID to find in the scan list
1213 * @param mode Network mode: Infrastructure or IBSS
1215 * @return index in BSSID list, or error return code (< 0)
1217 struct bss_descriptor
* libertas_find_BSSID_in_list(wlan_adapter
* adapter
,
1218 u8
* bssid
, u8 mode
)
1220 struct bss_descriptor
* iter_bss
;
1221 struct bss_descriptor
* found_bss
= NULL
;
1226 lbs_dbg_hex("libertas_find_BSSID_in_list: looking for ",
1229 /* Look through the scan table for a compatible match. The loop will
1230 * continue past a matched bssid that is not compatible in case there
1231 * is an AP with multiple SSIDs assigned to the same BSSID
1233 mutex_lock(&adapter
->lock
);
1234 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1235 if (compare_ether_addr(iter_bss
->bssid
, bssid
))
1236 continue; /* bssid doesn't match */
1240 if (!is_network_compatible(adapter
, iter_bss
, mode
))
1242 found_bss
= iter_bss
;
1245 found_bss
= iter_bss
;
1249 mutex_unlock(&adapter
->lock
);
1255 * @brief This function finds ssid in ssid list.
1257 * @param adapter A pointer to wlan_adapter
1258 * @param ssid SSID to find in the list
1259 * @param bssid BSSID to qualify the SSID selection (if provided)
1260 * @param mode Network mode: Infrastructure or IBSS
1262 * @return index in BSSID list
1264 struct bss_descriptor
* libertas_find_SSID_in_list(wlan_adapter
* adapter
,
1265 struct WLAN_802_11_SSID
*ssid
, u8
* bssid
, u8 mode
,
1269 struct bss_descriptor
* iter_bss
= NULL
;
1270 struct bss_descriptor
* found_bss
= NULL
;
1271 struct bss_descriptor
* tmp_oldest
= NULL
;
1273 mutex_lock(&adapter
->lock
);
1275 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1277 || (iter_bss
->last_scanned
< tmp_oldest
->last_scanned
))
1278 tmp_oldest
= iter_bss
;
1280 if (libertas_SSID_cmp(&iter_bss
->ssid
, ssid
) != 0)
1281 continue; /* ssid doesn't match */
1282 if (bssid
&& compare_ether_addr(iter_bss
->bssid
, bssid
) != 0)
1283 continue; /* bssid doesn't match */
1284 if ((channel
> 0) && (iter_bss
->channel
!= channel
))
1285 continue; /* channel doesn't match */
1290 if (!is_network_compatible(adapter
, iter_bss
, mode
))
1294 /* Found requested BSSID */
1295 found_bss
= iter_bss
;
1299 if (SCAN_RSSI(iter_bss
->rssi
) > bestrssi
) {
1300 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1301 found_bss
= iter_bss
;
1306 if (SCAN_RSSI(iter_bss
->rssi
) > bestrssi
) {
1307 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1308 found_bss
= iter_bss
;
1315 mutex_unlock(&adapter
->lock
);
1320 * @brief This function finds the best SSID in the Scan List
1322 * Search the scan table for the best SSID that also matches the current
1323 * adapter network preference (infrastructure or adhoc)
1325 * @param adapter A pointer to wlan_adapter
1327 * @return index in BSSID list
1329 struct bss_descriptor
* libertas_find_best_SSID_in_list(wlan_adapter
* adapter
,
1333 struct bss_descriptor
* iter_bss
;
1334 struct bss_descriptor
* best_bss
= NULL
;
1336 mutex_lock(&adapter
->lock
);
1338 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1342 if (!is_network_compatible(adapter
, iter_bss
, mode
))
1344 if (SCAN_RSSI(iter_bss
->rssi
) <= bestrssi
)
1346 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1347 best_bss
= iter_bss
;
1351 if (SCAN_RSSI(iter_bss
->rssi
) <= bestrssi
)
1353 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1354 best_bss
= iter_bss
;
1359 mutex_unlock(&adapter
->lock
);
1364 * @brief Find the AP with specific ssid in the scan list
1366 * @param priv A pointer to wlan_private structure
1367 * @param pSSID A pointer to AP's ssid
1369 * @return 0--success, otherwise--fail
1371 int libertas_find_best_network_SSID(wlan_private
* priv
,
1372 struct WLAN_802_11_SSID
*ssid
,
1373 u8 preferred_mode
, u8
*out_mode
)
1375 wlan_adapter
*adapter
= priv
->adapter
;
1377 struct bss_descriptor
* found
;
1379 lbs_deb_enter(LBS_DEB_ASSOC
);
1381 memset(ssid
, 0, sizeof(struct WLAN_802_11_SSID
));
1383 wlan_scan_networks(priv
, NULL
, 1);
1384 if (adapter
->surpriseremoved
)
1387 wait_event_interruptible(adapter
->cmd_pending
, !adapter
->nr_cmd_pending
);
1389 found
= libertas_find_best_SSID_in_list(adapter
, preferred_mode
);
1390 if (found
&& (found
->ssid
.ssidlength
> 0)) {
1391 memcpy(ssid
, &found
->ssid
, sizeof(struct WLAN_802_11_SSID
));
1392 *out_mode
= found
->mode
;
1396 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
1401 * @brief Scan Network
1403 * @param dev A pointer to net_device structure
1404 * @param info A pointer to iw_request_info structure
1405 * @param vwrq A pointer to iw_param structure
1406 * @param extra A pointer to extra data buf
1408 * @return 0 --success, otherwise fail
1410 int libertas_set_scan(struct net_device
*dev
, struct iw_request_info
*info
,
1411 struct iw_param
*vwrq
, char *extra
)
1413 wlan_private
*priv
= dev
->priv
;
1414 wlan_adapter
*adapter
= priv
->adapter
;
1416 lbs_deb_enter(LBS_DEB_SCAN
);
1418 wlan_scan_networks(priv
, NULL
, 0);
1420 if (adapter
->surpriseremoved
)
1423 lbs_deb_leave(LBS_DEB_SCAN
);
1428 * @brief Send a scan command for all available channels filtered on a spec
1430 * @param priv A pointer to wlan_private structure
1431 * @param prequestedssid A pointer to AP's ssid
1432 * @param keeppreviousscan Flag used to save/clear scan table before scan
1434 * @return 0-success, otherwise fail
1436 int libertas_send_specific_SSID_scan(wlan_private
* priv
,
1437 struct WLAN_802_11_SSID
*prequestedssid
,
1440 wlan_adapter
*adapter
= priv
->adapter
;
1441 struct wlan_ioctl_user_scan_cfg scancfg
;
1444 lbs_deb_enter(LBS_DEB_ASSOC
);
1446 if (prequestedssid
== NULL
)
1449 memset(&scancfg
, 0x00, sizeof(scancfg
));
1450 memcpy(scancfg
.ssid
, prequestedssid
->ssid
, prequestedssid
->ssidlength
);
1451 scancfg
.ssid_len
= prequestedssid
->ssidlength
;
1452 scancfg
.clear_ssid
= clear_ssid
;
1454 wlan_scan_networks(priv
, &scancfg
, 1);
1455 if (adapter
->surpriseremoved
)
1457 wait_event_interruptible(adapter
->cmd_pending
, !adapter
->nr_cmd_pending
);
1460 lbs_deb_leave(LBS_DEB_ASSOC
);
1465 * @brief scan an AP with specific BSSID
1467 * @param priv A pointer to wlan_private structure
1468 * @param bssid A pointer to AP's bssid
1469 * @param keeppreviousscan Flag used to save/clear scan table before scan
1471 * @return 0-success, otherwise fail
1473 int libertas_send_specific_BSSID_scan(wlan_private
* priv
, u8
* bssid
, u8 clear_bssid
)
1475 struct wlan_ioctl_user_scan_cfg scancfg
;
1477 lbs_deb_enter(LBS_DEB_ASSOC
);
1482 memset(&scancfg
, 0x00, sizeof(scancfg
));
1483 memcpy(scancfg
.bssid
, bssid
, ETH_ALEN
);
1484 scancfg
.clear_bssid
= clear_bssid
;
1486 wlan_scan_networks(priv
, &scancfg
, 1);
1487 if (priv
->adapter
->surpriseremoved
)
1489 wait_event_interruptible(priv
->adapter
->cmd_pending
,
1490 !priv
->adapter
->nr_cmd_pending
);
1493 lbs_deb_leave(LBS_DEB_ASSOC
);
1497 static inline char *libertas_translate_scan(wlan_private
*priv
,
1498 char *start
, char *stop
,
1499 struct bss_descriptor
*bss
)
1501 wlan_adapter
*adapter
= priv
->adapter
;
1502 struct chan_freq_power
*cfp
;
1503 char *current_val
; /* For rates */
1504 struct iw_event iwe
; /* Temporary buffer */
1506 #define PERFECT_RSSI ((u8)50)
1507 #define WORST_RSSI ((u8)0)
1508 #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
1511 cfp
= libertas_find_cfp_by_band_and_channel(adapter
, 0, bss
->channel
);
1513 lbs_deb_scan("Invalid channel number %d\n", bss
->channel
);
1517 /* First entry *MUST* be the AP BSSID */
1518 iwe
.cmd
= SIOCGIWAP
;
1519 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
1520 memcpy(iwe
.u
.ap_addr
.sa_data
, &bss
->bssid
, ETH_ALEN
);
1521 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_ADDR_LEN
);
1524 iwe
.cmd
= SIOCGIWESSID
;
1525 iwe
.u
.data
.flags
= 1;
1526 iwe
.u
.data
.length
= min(bss
->ssid
.ssidlength
, (u32
) IW_ESSID_MAX_SIZE
);
1527 start
= iwe_stream_add_point(start
, stop
, &iwe
, bss
->ssid
.ssid
);
1530 iwe
.cmd
= SIOCGIWMODE
;
1531 iwe
.u
.mode
= bss
->mode
;
1532 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_UINT_LEN
);
1535 iwe
.cmd
= SIOCGIWFREQ
;
1536 iwe
.u
.freq
.m
= (long)cfp
->freq
* 100000;
1538 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_FREQ_LEN
);
1540 /* Add quality statistics */
1542 iwe
.u
.qual
.updated
= IW_QUAL_ALL_UPDATED
;
1543 iwe
.u
.qual
.level
= SCAN_RSSI(bss
->rssi
);
1545 rssi
= iwe
.u
.qual
.level
- MRVDRV_NF_DEFAULT_SCAN_VALUE
;
1547 (100 * RSSI_DIFF
* RSSI_DIFF
- (PERFECT_RSSI
- rssi
) *
1548 (15 * (RSSI_DIFF
) + 62 * (PERFECT_RSSI
- rssi
))) /
1549 (RSSI_DIFF
* RSSI_DIFF
);
1550 if (iwe
.u
.qual
.qual
> 100)
1551 iwe
.u
.qual
.qual
= 100;
1553 if (adapter
->NF
[TYPE_BEACON
][TYPE_NOAVG
] == 0) {
1554 iwe
.u
.qual
.noise
= MRVDRV_NF_DEFAULT_SCAN_VALUE
;
1557 CAL_NF(adapter
->NF
[TYPE_BEACON
][TYPE_NOAVG
]);
1560 /* Locally created ad-hoc BSSs won't have beacons if this is the
1561 * only station in the adhoc network; so get signal strength
1562 * from receive statistics.
1564 if ((adapter
->mode
== IW_MODE_ADHOC
)
1565 && adapter
->adhoccreate
1566 && !libertas_SSID_cmp(&adapter
->curbssparams
.ssid
, &bss
->ssid
)) {
1568 snr
= adapter
->SNR
[TYPE_RXPD
][TYPE_AVG
] / AVG_SCALE
;
1569 nf
= adapter
->NF
[TYPE_RXPD
][TYPE_AVG
] / AVG_SCALE
;
1570 iwe
.u
.qual
.level
= CAL_RSSI(snr
, nf
);
1572 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_QUAL_LEN
);
1574 /* Add encryption capability */
1575 iwe
.cmd
= SIOCGIWENCODE
;
1577 iwe
.u
.data
.flags
= IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
1579 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
1581 iwe
.u
.data
.length
= 0;
1582 start
= iwe_stream_add_point(start
, stop
, &iwe
, bss
->ssid
.ssid
);
1584 current_val
= start
+ IW_EV_LCP_LEN
;
1586 iwe
.cmd
= SIOCGIWRATE
;
1587 iwe
.u
.bitrate
.fixed
= 0;
1588 iwe
.u
.bitrate
.disabled
= 0;
1589 iwe
.u
.bitrate
.value
= 0;
1591 for (j
= 0; j
< sizeof(bss
->libertas_supported_rates
); j
++) {
1592 u8 rate
= bss
->libertas_supported_rates
[j
];
1594 break; /* no more rates */
1595 /* Bit rate given in 500 kb/s units (+ 0x80) */
1596 iwe
.u
.bitrate
.value
= (rate
& 0x7f) * 500000;
1597 current_val
= iwe_stream_add_value(start
, current_val
,
1598 stop
, &iwe
, IW_EV_PARAM_LEN
);
1600 if ((bss
->mode
== IW_MODE_ADHOC
)
1601 && !libertas_SSID_cmp(&adapter
->curbssparams
.ssid
, &bss
->ssid
)
1602 && adapter
->adhoccreate
) {
1603 iwe
.u
.bitrate
.value
= 22 * 500000;
1604 current_val
= iwe_stream_add_value(start
, current_val
,
1605 stop
, &iwe
, IW_EV_PARAM_LEN
);
1607 /* Check if we added any event */
1608 if((current_val
- start
) > IW_EV_LCP_LEN
)
1609 start
= current_val
;
1611 memset(&iwe
, 0, sizeof(iwe
));
1612 if (bss
->wpa_ie_len
) {
1613 char buf
[MAX_WPA_IE_LEN
];
1614 memcpy(buf
, bss
->wpa_ie
, bss
->wpa_ie_len
);
1615 iwe
.cmd
= IWEVGENIE
;
1616 iwe
.u
.data
.length
= bss
->wpa_ie_len
;
1617 start
= iwe_stream_add_point(start
, stop
, &iwe
, buf
);
1620 memset(&iwe
, 0, sizeof(iwe
));
1621 if (bss
->rsn_ie_len
) {
1622 char buf
[MAX_WPA_IE_LEN
];
1623 memcpy(buf
, bss
->rsn_ie
, bss
->rsn_ie_len
);
1624 iwe
.cmd
= IWEVGENIE
;
1625 iwe
.u
.data
.length
= bss
->rsn_ie_len
;
1626 start
= iwe_stream_add_point(start
, stop
, &iwe
, buf
);
1633 * @brief Retrieve the scan table entries via wireless tools IOCTL call
1635 * @param dev A pointer to net_device structure
1636 * @param info A pointer to iw_request_info structure
1637 * @param dwrq A pointer to iw_point structure
1638 * @param extra A pointer to extra data buf
1640 * @return 0 --success, otherwise fail
1642 int libertas_get_scan(struct net_device
*dev
, struct iw_request_info
*info
,
1643 struct iw_point
*dwrq
, char *extra
)
1645 #define SCAN_ITEM_SIZE 128
1646 wlan_private
*priv
= dev
->priv
;
1647 wlan_adapter
*adapter
= priv
->adapter
;
1650 char *stop
= ev
+ dwrq
->length
;
1651 struct bss_descriptor
* iter_bss
;
1652 struct bss_descriptor
* safe
;
1654 lbs_deb_enter(LBS_DEB_ASSOC
);
1656 /* If we've got an uncompleted scan, schedule the next part */
1657 if (!adapter
->nr_cmd_pending
&& adapter
->last_scanned_channel
)
1658 wlan_scan_networks(priv
, NULL
, 0);
1660 /* Update RSSI if current BSS is a locally created ad-hoc BSS */
1661 if ((adapter
->mode
== IW_MODE_ADHOC
) && adapter
->adhoccreate
) {
1662 libertas_prepare_and_send_command(priv
, cmd_802_11_rssi
, 0,
1663 cmd_option_waitforrsp
, 0, NULL
);
1666 mutex_lock(&adapter
->lock
);
1667 list_for_each_entry_safe (iter_bss
, safe
, &adapter
->network_list
, list
) {
1669 unsigned long stale_time
;
1671 if (stop
- ev
< SCAN_ITEM_SIZE
) {
1676 /* Prune old an old scan result */
1677 stale_time
= iter_bss
->last_scanned
+ DEFAULT_MAX_SCAN_AGE
;
1678 if (time_after(jiffies
, stale_time
)) {
1679 list_move_tail (&iter_bss
->list
,
1680 &adapter
->network_free_list
);
1681 clear_bss_descriptor(iter_bss
);
1685 /* Translate to WE format this entry */
1686 next_ev
= libertas_translate_scan(priv
, ev
, stop
, iter_bss
);
1687 if (next_ev
== NULL
)
1691 mutex_unlock(&adapter
->lock
);
1693 dwrq
->length
= (ev
- extra
);
1696 lbs_deb_leave(LBS_DEB_ASSOC
);
1701 * @brief Prepare a scan command to be sent to the firmware
1703 * Use the wlan_scan_cmd_config sent to the command processing module in
1704 * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1705 * struct to send to firmware.
1707 * The fixed fields specifying the BSS type and BSSID filters as well as a
1708 * variable number/length of TLVs are sent in the command to firmware.
1710 * @param priv A pointer to wlan_private structure
1711 * @param cmd A pointer to cmd_ds_command structure to be sent to
1712 * firmware with the cmd_DS_801_11_SCAN structure
1713 * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used
1714 * to set the fields/TLVs for the command sent to firmware
1718 * @sa wlan_scan_create_channel_list
1720 int libertas_cmd_80211_scan(wlan_private
* priv
,
1721 struct cmd_ds_command
*cmd
, void *pdata_buf
)
1723 struct cmd_ds_802_11_scan
*pscan
= &cmd
->params
.scan
;
1724 struct wlan_scan_cmd_config
*pscancfg
;
1726 lbs_deb_enter(LBS_DEB_ASSOC
);
1728 pscancfg
= pdata_buf
;
1730 /* Set fixed field variables in scan command */
1731 pscan
->bsstype
= pscancfg
->bsstype
;
1732 memcpy(pscan
->BSSID
, pscancfg
->bssid
, sizeof(pscan
->BSSID
));
1733 memcpy(pscan
->tlvbuffer
, pscancfg
->tlvbuffer
, pscancfg
->tlvbufferlen
);
1735 cmd
->command
= cpu_to_le16(cmd_802_11_scan
);
1737 /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1738 cmd
->size
= cpu_to_le16(sizeof(pscan
->bsstype
)
1739 + sizeof(pscan
->BSSID
)
1740 + pscancfg
->tlvbufferlen
+ S_DS_GEN
);
1742 lbs_deb_scan("SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
1743 le16_to_cpu(cmd
->command
), le16_to_cpu(cmd
->size
),
1744 le16_to_cpu(cmd
->seqnum
));
1746 lbs_deb_leave(LBS_DEB_ASSOC
);
1750 static inline int is_same_network(struct bss_descriptor
*src
,
1751 struct bss_descriptor
*dst
)
1753 /* A network is only a duplicate if the channel, BSSID, and ESSID
1754 * all match. We treat all <hidden> with the same BSSID and channel
1756 return ((src
->ssid
.ssidlength
== dst
->ssid
.ssidlength
) &&
1757 (src
->channel
== dst
->channel
) &&
1758 !compare_ether_addr(src
->bssid
, dst
->bssid
) &&
1759 !memcmp(src
->ssid
.ssid
, dst
->ssid
.ssid
, src
->ssid
.ssidlength
));
1763 * @brief This function handles the command response of scan
1765 * The response buffer for the scan command has the following
1768 * .-----------------------------------------------------------.
1769 * | header (4 * sizeof(u16)): Standard command response hdr |
1770 * .-----------------------------------------------------------.
1771 * | bufsize (u16) : sizeof the BSS Description data |
1772 * .-----------------------------------------------------------.
1773 * | NumOfSet (u8) : Number of BSS Descs returned |
1774 * .-----------------------------------------------------------.
1775 * | BSSDescription data (variable, size given in bufsize) |
1776 * .-----------------------------------------------------------.
1777 * | TLV data (variable, size calculated using header->size, |
1778 * | bufsize and sizeof the fixed fields above) |
1779 * .-----------------------------------------------------------.
1781 * @param priv A pointer to wlan_private structure
1782 * @param resp A pointer to cmd_ds_command
1786 int libertas_ret_80211_scan(wlan_private
* priv
, struct cmd_ds_command
*resp
)
1788 wlan_adapter
*adapter
= priv
->adapter
;
1789 struct cmd_ds_802_11_scan_rsp
*pscan
;
1790 struct mrvlietypes_data
*ptlv
;
1791 struct mrvlietypes_tsftimestamp
*ptsftlv
;
1792 struct bss_descriptor
* iter_bss
;
1793 struct bss_descriptor
* safe
;
1801 lbs_deb_enter(LBS_DEB_ASSOC
);
1803 /* Prune old entries from scan table */
1804 list_for_each_entry_safe (iter_bss
, safe
, &adapter
->network_list
, list
) {
1805 unsigned long stale_time
= iter_bss
->last_scanned
+ DEFAULT_MAX_SCAN_AGE
;
1806 if (time_before(jiffies
, stale_time
))
1808 list_move_tail (&iter_bss
->list
, &adapter
->network_free_list
);
1809 clear_bss_descriptor(iter_bss
);
1812 pscan
= &resp
->params
.scanresp
;
1814 if (pscan
->nr_sets
> MAX_NETWORK_COUNT
) {
1816 "SCAN_RESP: too many scan results (%d, max %d)!!\n",
1817 pscan
->nr_sets
, MAX_NETWORK_COUNT
);
1822 bytesleft
= le16_to_cpu(pscan
->bssdescriptsize
);
1823 lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft
);
1825 scanrespsize
= le16_to_cpu(resp
->size
);
1826 lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n",
1829 pbssinfo
= pscan
->bssdesc_and_tlvbuffer
;
1831 /* The size of the TLV buffer is equal to the entire command response
1832 * size (scanrespsize) minus the fixed fields (sizeof()'s), the
1833 * BSS Descriptions (bssdescriptsize as bytesLef) and the command
1834 * response header (S_DS_GEN)
1836 tlvbufsize
= scanrespsize
- (bytesleft
+ sizeof(pscan
->bssdescriptsize
)
1837 + sizeof(pscan
->nr_sets
)
1840 ptlv
= (struct mrvlietypes_data
*) (pscan
->bssdesc_and_tlvbuffer
+ bytesleft
);
1842 /* Search the TLV buffer space in the scan response for any valid TLVs */
1843 wlan_ret_802_11_scan_get_tlv_ptrs(ptlv
, tlvbufsize
, &ptsftlv
);
1846 * Process each scan response returned (pscan->nr_sets). Save
1847 * the information in the newbssentry and then insert into the
1848 * driver scan table either as an update to an existing entry
1849 * or as an addition at the end of the table
1851 for (idx
= 0; idx
< pscan
->nr_sets
&& bytesleft
; idx
++) {
1852 struct bss_descriptor
new;
1853 struct bss_descriptor
* found
= NULL
;
1854 struct bss_descriptor
* oldest
= NULL
;
1856 /* Process the data fields and IEs returned for this BSS */
1857 memset(&new, 0, sizeof (struct bss_descriptor
));
1858 if (libertas_process_bss(&new, &pbssinfo
, &bytesleft
) != 0) {
1859 /* error parsing the scan response, skipped */
1860 lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n");
1864 /* Try to find this bss in the scan table */
1865 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1866 if (is_same_network(iter_bss
, &new)) {
1871 if ((oldest
== NULL
) ||
1872 (iter_bss
->last_scanned
< oldest
->last_scanned
))
1877 /* found, clear it */
1878 clear_bss_descriptor(found
);
1879 } else if (!list_empty(&adapter
->network_free_list
)) {
1880 /* Pull one from the free list */
1881 found
= list_entry(adapter
->network_free_list
.next
,
1882 struct bss_descriptor
, list
);
1883 list_move_tail(&found
->list
, &adapter
->network_list
);
1884 } else if (oldest
) {
1885 /* If there are no more slots, expire the oldest */
1887 clear_bss_descriptor(found
);
1888 list_move_tail(&found
->list
, &adapter
->network_list
);
1893 lbs_deb_scan("SCAN_RESP: BSSID = " MAC_FMT
"\n",
1894 new.bssid
[0], new.bssid
[1], new.bssid
[2],
1895 new.bssid
[3], new.bssid
[4], new.bssid
[5]);
1898 * If the TSF TLV was appended to the scan results, save the
1899 * this entries TSF value in the networktsf field. The
1900 * networktsf is the firmware's TSF value at the time the
1901 * beacon or probe response was received.
1904 new.networktsf
= le64_to_cpup(&ptsftlv
->tsftable
[idx
]);
1907 /* Copy the locally created newbssentry to the scan table */
1908 memcpy(found
, &new, offsetof(struct bss_descriptor
, list
));
1914 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);