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>
22 //! Approximate amount of data needed to pass a scan result back to iwlist
23 #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
30 + 40) /* 40 for WPAIE */
32 //! Memory needed to store a max sized channel List TLV for a firmware scan
33 #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
34 + (MRVDRV_MAX_CHANNELS_PER_SCAN \
35 * sizeof(struct chanscanparamset)))
37 //! Memory needed to store a max number/size SSID TLV for a firmware scan
38 #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
40 //! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
41 #define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \
42 + sizeof(struct mrvlietypes_numprobes) \
46 //! The maximum number of channels the firmware can scan per command
47 #define MRVDRV_MAX_CHANNELS_PER_SCAN 14
50 * @brief Number of channels to scan per firmware scan command issuance.
52 * Number restricted to prevent hitting the limit on the amount of scan data
53 * returned in a single firmware scan command.
55 #define MRVDRV_CHANNELS_PER_SCAN_CMD 4
57 //! Scan time specified in the channel TLV for each channel for passive scans
58 #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
60 //! Scan time specified in the channel TLV for each channel for active scans
61 #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
63 static const u8 zeromac
[ETH_ALEN
] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
64 static const u8 bcastmac
[ETH_ALEN
] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
66 static inline void clear_bss_descriptor (struct bss_descriptor
* bss
)
68 /* Don't blow away ->list, just BSS data */
69 memset(bss
, 0, offsetof(struct bss_descriptor
, list
));
72 static inline int match_bss_no_security(struct wlan_802_11_security
* secinfo
,
73 struct bss_descriptor
* match_bss
)
75 if ( !secinfo
->wep_enabled
76 && !secinfo
->WPAenabled
77 && !secinfo
->WPA2enabled
78 && match_bss
->wpa_ie
[0] != MFIE_TYPE_GENERIC
79 && match_bss
->rsn_ie
[0] != MFIE_TYPE_RSN
80 && !(match_bss
->capability
& WLAN_CAPABILITY_PRIVACY
)) {
86 static inline int match_bss_static_wep(struct wlan_802_11_security
* secinfo
,
87 struct bss_descriptor
* match_bss
)
89 if ( secinfo
->wep_enabled
90 && !secinfo
->WPAenabled
91 && !secinfo
->WPA2enabled
92 && (match_bss
->capability
& WLAN_CAPABILITY_PRIVACY
)) {
98 static inline int match_bss_wpa(struct wlan_802_11_security
* secinfo
,
99 struct bss_descriptor
* match_bss
)
101 if ( !secinfo
->wep_enabled
102 && secinfo
->WPAenabled
103 && (match_bss
->wpa_ie
[0] == MFIE_TYPE_GENERIC
)
104 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
105 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
113 static inline int match_bss_wpa2(struct wlan_802_11_security
* secinfo
,
114 struct bss_descriptor
* match_bss
)
116 if ( !secinfo
->wep_enabled
117 && secinfo
->WPA2enabled
118 && (match_bss
->rsn_ie
[0] == MFIE_TYPE_RSN
)
119 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
120 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
128 static inline int match_bss_dynamic_wep(struct wlan_802_11_security
* secinfo
,
129 struct bss_descriptor
* match_bss
)
131 if ( !secinfo
->wep_enabled
132 && !secinfo
->WPAenabled
133 && !secinfo
->WPA2enabled
134 && (match_bss
->wpa_ie
[0] != MFIE_TYPE_GENERIC
)
135 && (match_bss
->rsn_ie
[0] != MFIE_TYPE_RSN
)
136 && (match_bss
->capability
& WLAN_CAPABILITY_PRIVACY
)) {
143 * @brief Check if a scanned network compatible with the driver settings
145 * WEP WPA WPA2 ad-hoc encrypt Network
146 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
147 * 0 0 0 0 NONE 0 0 0 yes No security
148 * 1 0 0 0 NONE 1 0 0 yes Static WEP
149 * 0 1 0 0 x 1x 1 x yes WPA
150 * 0 0 1 0 x 1x x 1 yes WPA2
151 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
152 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
155 * @param adapter A pointer to wlan_adapter
156 * @param index Index in scantable to check against current driver settings
157 * @param mode Network mode: Infrastructure or IBSS
159 * @return Index in scantable, or error code if negative
161 static int is_network_compatible(wlan_adapter
* adapter
,
162 struct bss_descriptor
* bss
, u8 mode
)
166 lbs_deb_enter(LBS_DEB_ASSOC
);
168 if (bss
->mode
!= mode
)
171 if ((matched
= match_bss_no_security(&adapter
->secinfo
, bss
))) {
173 } else if ((matched
= match_bss_static_wep(&adapter
->secinfo
, bss
))) {
175 } else if ((matched
= match_bss_wpa(&adapter
->secinfo
, bss
))) {
177 "is_network_compatible() WPA: wpa_ie=%#x "
178 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
179 "privacy=%#x\n", bss
->wpa_ie
[0], bss
->rsn_ie
[0],
180 adapter
->secinfo
.wep_enabled
? "e" : "d",
181 adapter
->secinfo
.WPAenabled
? "e" : "d",
182 adapter
->secinfo
.WPA2enabled
? "e" : "d",
183 (bss
->capability
& WLAN_CAPABILITY_PRIVACY
));
185 } else if ((matched
= match_bss_wpa2(&adapter
->secinfo
, bss
))) {
187 "is_network_compatible() WPA2: wpa_ie=%#x "
188 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
189 "privacy=%#x\n", bss
->wpa_ie
[0], bss
->rsn_ie
[0],
190 adapter
->secinfo
.wep_enabled
? "e" : "d",
191 adapter
->secinfo
.WPAenabled
? "e" : "d",
192 adapter
->secinfo
.WPA2enabled
? "e" : "d",
193 (bss
->capability
& WLAN_CAPABILITY_PRIVACY
));
195 } else if ((matched
= match_bss_dynamic_wep(&adapter
->secinfo
, bss
))) {
197 "is_network_compatible() dynamic WEP: "
198 "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
199 bss
->wpa_ie
[0], bss
->rsn_ie
[0],
200 (bss
->capability
& WLAN_CAPABILITY_PRIVACY
));
204 /* bss security settings don't match those configured on card */
206 "is_network_compatible() FAILED: wpa_ie=%#x "
207 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
208 bss
->wpa_ie
[0], bss
->rsn_ie
[0],
209 adapter
->secinfo
.wep_enabled
? "e" : "d",
210 adapter
->secinfo
.WPAenabled
? "e" : "d",
211 adapter
->secinfo
.WPA2enabled
? "e" : "d",
212 (bss
->capability
& WLAN_CAPABILITY_PRIVACY
));
215 lbs_deb_leave(LBS_DEB_SCAN
);
220 * @brief Create a channel list for the driver to scan based on region info
222 * Use the driver region/band information to construct a comprehensive list
223 * of channels to scan. This routine is used for any scan that is not
224 * provided a specific channel list to scan.
226 * @param priv A pointer to wlan_private structure
227 * @param scanchanlist Output parameter: resulting channel list to scan
228 * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
229 * is being sent in the command to firmware. Used to
230 * increase the number of channels sent in a scan
231 * command and to disable the firmware channel scan
236 static void wlan_scan_create_channel_list(wlan_private
* priv
,
237 struct chanscanparamset
* scanchanlist
,
241 wlan_adapter
*adapter
= priv
->adapter
;
242 struct region_channel
*scanregion
;
243 struct chan_freq_power
*cfp
;
251 /* Set the default scan type to the user specified type, will later
252 * be changed to passive on a per channel basis if restricted by
253 * regulatory requirements (11d or 11h)
255 scantype
= CMD_SCAN_TYPE_ACTIVE
;
257 for (rgnidx
= 0; rgnidx
< ARRAY_SIZE(adapter
->region_channel
); rgnidx
++) {
258 if (priv
->adapter
->enable11d
&&
259 adapter
->connect_status
!= LIBERTAS_CONNECTED
) {
260 /* Scan all the supported chan for the first scan */
261 if (!adapter
->universal_channel
[rgnidx
].valid
)
263 scanregion
= &adapter
->universal_channel
[rgnidx
];
265 /* clear the parsed_region_chan for the first scan */
266 memset(&adapter
->parsed_region_chan
, 0x00,
267 sizeof(adapter
->parsed_region_chan
));
269 if (!adapter
->region_channel
[rgnidx
].valid
)
271 scanregion
= &adapter
->region_channel
[rgnidx
];
275 nextchan
< scanregion
->nrcfp
; nextchan
++, chanidx
++) {
277 cfp
= scanregion
->CFP
+ nextchan
;
279 if (priv
->adapter
->enable11d
) {
281 libertas_get_scan_type_11d(cfp
->channel
,
286 switch (scanregion
->band
) {
290 scanchanlist
[chanidx
].radiotype
=
291 CMD_SCAN_RADIO_TYPE_BG
;
295 if (scantype
== CMD_SCAN_TYPE_PASSIVE
) {
296 scanchanlist
[chanidx
].maxscantime
=
297 cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME
);
298 scanchanlist
[chanidx
].chanscanmode
.passivescan
=
301 scanchanlist
[chanidx
].maxscantime
=
302 cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME
);
303 scanchanlist
[chanidx
].chanscanmode
.passivescan
=
307 scanchanlist
[chanidx
].channumber
= cfp
->channel
;
310 scanchanlist
[chanidx
].chanscanmode
.
318 /* Delayed partial scan worker */
319 void libertas_scan_worker(struct work_struct
*work
)
321 wlan_private
*priv
= container_of(work
, wlan_private
, scan_work
.work
);
323 wlan_scan_networks(priv
, NULL
, 0);
328 * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
330 * Application layer or other functions can invoke wlan_scan_networks
331 * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
332 * This structure is used as the basis of one or many wlan_scan_cmd_config
333 * commands that are sent to the command processing module and sent to
336 * Create a wlan_scan_cmd_config based on the following user supplied
337 * parameters (if present):
340 * - Number of Probes to be sent
343 * If the SSID or BSSID filter is not present, disable/clear the filter.
344 * If the number of probes is not set, use the adapter default setting
345 * Qualify the channel
347 * @param priv A pointer to wlan_private structure
348 * @param puserscanin NULL or pointer to scan configuration parameters
349 * @param ppchantlvout Output parameter: Pointer to the start of the
350 * channel TLV portion of the output scan config
351 * @param pscanchanlist Output parameter: Pointer to the resulting channel
353 * @param pmaxchanperscan Output parameter: Number of channels to scan for
354 * each issuance of the firmware scan command
355 * @param pfilteredscan Output parameter: Flag indicating whether or not
356 * a BSSID or SSID filter is being sent in the
357 * command to firmware. Used to increase the number
358 * of channels sent in a scan command and to
359 * disable the firmware channel scan filter.
360 * @param pscancurrentonly Output parameter: Flag indicating whether or not
361 * we are only scanning our current active channel
363 * @return resulting scan configuration
365 static struct wlan_scan_cmd_config
*
366 wlan_scan_setup_scan_config(wlan_private
* priv
,
367 const struct wlan_ioctl_user_scan_cfg
* puserscanin
,
368 struct mrvlietypes_chanlistparamset
** ppchantlvout
,
369 struct chanscanparamset
* pscanchanlist
,
370 int *pmaxchanperscan
,
372 u8
* pscancurrentonly
)
374 struct mrvlietypes_numprobes
*pnumprobestlv
;
375 struct mrvlietypes_ssidparamset
*pssidtlv
;
376 struct wlan_scan_cmd_config
* pscancfgout
= NULL
;
385 pscancfgout
= kzalloc(MAX_SCAN_CFG_ALLOC
, GFP_KERNEL
);
386 if (pscancfgout
== NULL
)
389 /* The tlvbufferlen is calculated for each scan command. The TLVs added
390 * in this routine will be preserved since the routine that sends
391 * the command will append channelTLVs at *ppchantlvout. The difference
392 * between the *ppchantlvout and the tlvbuffer start will be used
393 * to calculate the size of anything we add in this routine.
395 pscancfgout
->tlvbufferlen
= 0;
397 /* Running tlv pointer. Assigned to ppchantlvout at end of function
398 * so later routines know where channels can be added to the command buf
400 ptlvpos
= pscancfgout
->tlvbuffer
;
403 * Set the initial scan paramters for progressive scanning. If a specific
404 * BSSID or SSID is used, the number of channels in the scan command
405 * will be increased to the absolute maximum
407 *pmaxchanperscan
= MRVDRV_CHANNELS_PER_SCAN_CMD
;
409 /* Initialize the scan as un-filtered by firmware, set to TRUE below if
410 * a SSID or BSSID filter is sent in the command
414 /* Initialize the scan as not being only on the current channel. If
415 * the channel list is customized, only contains one channel, and
416 * is the active channel, this is set true and data flow is not halted.
418 *pscancurrentonly
= 0;
421 /* Set the bss type scan filter, use adapter setting if unset */
422 pscancfgout
->bsstype
=
423 puserscanin
->bsstype
? puserscanin
->bsstype
: CMD_BSS_TYPE_ANY
;
425 /* Set the number of probes to send, use adapter setting if unset */
426 numprobes
= puserscanin
->numprobes
? puserscanin
->numprobes
: 0;
429 * Set the BSSID filter to the incoming configuration,
430 * if non-zero. If not set, it will remain disabled (all zeros).
432 memcpy(pscancfgout
->bssid
, puserscanin
->bssid
,
433 sizeof(pscancfgout
->bssid
));
435 if (puserscanin
->ssid_len
) {
437 (struct mrvlietypes_ssidparamset
*) pscancfgout
->
439 pssidtlv
->header
.type
= cpu_to_le16(TLV_TYPE_SSID
);
440 pssidtlv
->header
.len
= cpu_to_le16(puserscanin
->ssid_len
);
441 memcpy(pssidtlv
->ssid
, puserscanin
->ssid
,
442 puserscanin
->ssid_len
);
443 ptlvpos
+= sizeof(pssidtlv
->header
) + puserscanin
->ssid_len
;
447 * The default number of channels sent in the command is low to
448 * ensure the response buffer from the firmware does not truncate
449 * scan results. That is not an issue with an SSID or BSSID
450 * filter applied to the scan results in the firmware.
452 if ( puserscanin
->ssid_len
453 || (compare_ether_addr(pscancfgout
->bssid
, &zeromac
[0]) != 0)) {
454 *pmaxchanperscan
= MRVDRV_MAX_CHANNELS_PER_SCAN
;
458 pscancfgout
->bsstype
= CMD_BSS_TYPE_ANY
;
462 /* If the input config or adapter has the number of Probes set, add tlv */
464 pnumprobestlv
= (struct mrvlietypes_numprobes
*) ptlvpos
;
465 pnumprobestlv
->header
.type
= cpu_to_le16(TLV_TYPE_NUMPROBES
);
466 pnumprobestlv
->header
.len
= cpu_to_le16(2);
467 pnumprobestlv
->numprobes
= cpu_to_le16(numprobes
);
469 ptlvpos
+= sizeof(*pnumprobestlv
);
473 * Set the output for the channel TLV to the address in the tlv buffer
474 * past any TLVs that were added in this fuction (SSID, numprobes).
475 * channel TLVs will be added past this for each scan command, preserving
476 * the TLVs that were previously added.
478 *ppchantlvout
= (struct mrvlietypes_chanlistparamset
*) ptlvpos
;
480 if (!puserscanin
|| !puserscanin
->chanlist
[0].channumber
) {
481 /* Create a default channel scan list */
482 lbs_deb_scan("Scan: Creating full region channel list\n");
483 wlan_scan_create_channel_list(priv
, pscanchanlist
,
488 lbs_deb_scan("Scan: Using supplied channel list\n");
490 chanidx
< WLAN_IOCTL_USER_SCAN_CHAN_MAX
491 && puserscanin
->chanlist
[chanidx
].channumber
; chanidx
++) {
493 channel
= puserscanin
->chanlist
[chanidx
].channumber
;
494 (pscanchanlist
+ chanidx
)->channumber
= channel
;
496 radiotype
= puserscanin
->chanlist
[chanidx
].radiotype
;
497 (pscanchanlist
+ chanidx
)->radiotype
= radiotype
;
499 scantype
= puserscanin
->chanlist
[chanidx
].scantype
;
501 if (scantype
== CMD_SCAN_TYPE_PASSIVE
) {
503 chanidx
)->chanscanmode
.passivescan
= 1;
506 chanidx
)->chanscanmode
.passivescan
= 0;
509 if (puserscanin
->chanlist
[chanidx
].scantime
) {
510 scandur
= puserscanin
->chanlist
[chanidx
].scantime
;
512 if (scantype
== CMD_SCAN_TYPE_PASSIVE
) {
513 scandur
= MRVDRV_PASSIVE_SCAN_CHAN_TIME
;
515 scandur
= MRVDRV_ACTIVE_SCAN_CHAN_TIME
;
519 (pscanchanlist
+ chanidx
)->minscantime
=
520 cpu_to_le16(scandur
);
521 (pscanchanlist
+ chanidx
)->maxscantime
=
522 cpu_to_le16(scandur
);
525 /* Check if we are only scanning the current channel */
526 if ((chanidx
== 1) &&
527 (puserscanin
->chanlist
[0].channumber
==
528 priv
->adapter
->curbssparams
.channel
)) {
529 *pscancurrentonly
= 1;
530 lbs_deb_scan("Scan: Scanning current channel only");
538 * @brief Construct and send multiple scan config commands to the firmware
540 * Previous routines have created a wlan_scan_cmd_config with any requested
541 * TLVs. This function splits the channel TLV into maxchanperscan lists
542 * and sends the portion of the channel TLV along with the other TLVs
543 * to the wlan_cmd routines for execution in the firmware.
545 * @param priv A pointer to wlan_private structure
546 * @param maxchanperscan Maximum number channels to be included in each
547 * scan command sent to firmware
548 * @param filteredscan Flag indicating whether or not a BSSID or SSID
549 * filter is being used for the firmware command
550 * scan command sent to firmware
551 * @param pscancfgout Scan configuration used for this scan.
552 * @param pchantlvout Pointer in the pscancfgout where the channel TLV
553 * should start. This is past any other TLVs that
554 * must be sent down in each firmware command.
555 * @param pscanchanlist List of channels to scan in maxchanperscan segments
557 * @return 0 or error return otherwise
559 static int wlan_scan_channel_list(wlan_private
* priv
,
562 struct wlan_scan_cmd_config
* pscancfgout
,
563 struct mrvlietypes_chanlistparamset
* pchantlvout
,
564 struct chanscanparamset
* pscanchanlist
,
565 const struct wlan_ioctl_user_scan_cfg
* puserscanin
,
568 struct chanscanparamset
*ptmpchan
;
569 struct chanscanparamset
*pstartchan
;
575 union iwreq_data wrqu
;
577 lbs_deb_enter(LBS_DEB_ASSOC
);
579 if (pscancfgout
== 0 || pchantlvout
== 0 || pscanchanlist
== 0) {
580 lbs_deb_scan("Scan: Null detect: %p, %p, %p\n",
581 pscancfgout
, pchantlvout
, pscanchanlist
);
585 pchantlvout
->header
.type
= cpu_to_le16(TLV_TYPE_CHANLIST
);
587 /* Set the temp channel struct pointer to the start of the desired list */
588 ptmpchan
= pscanchanlist
;
590 if (priv
->adapter
->last_scanned_channel
&& !puserscanin
)
591 ptmpchan
+= priv
->adapter
->last_scanned_channel
;
593 /* Loop through the desired channel list, sending a new firmware scan
594 * commands for each maxchanperscan channels (or for 1,6,11 individually
595 * if configured accordingly)
597 while (ptmpchan
->channumber
) {
600 pchantlvout
->header
.len
= 0;
601 scanband
= ptmpchan
->radiotype
;
602 pstartchan
= ptmpchan
;
605 /* Construct the channel TLV for the scan command. Continue to
606 * insert channel TLVs until:
607 * - the tlvidx hits the maximum configured per scan command
608 * - the next channel to insert is 0 (end of desired channel list)
609 * - doneearly is set (controlling individual scanning of 1,6,11)
611 while (tlvidx
< maxchanperscan
&& ptmpchan
->channumber
612 && !doneearly
&& scanned
< 2) {
614 lbs_deb_scan("Scan: Chan(%3d), Radio(%d), mode(%d,%d), "
616 ptmpchan
->channumber
, ptmpchan
->radiotype
,
617 ptmpchan
->chanscanmode
.passivescan
,
618 ptmpchan
->chanscanmode
.disablechanfilt
,
619 ptmpchan
->maxscantime
);
621 /* Copy the current channel TLV to the command being prepared */
622 memcpy(pchantlvout
->chanscanparam
+ tlvidx
,
623 ptmpchan
, sizeof(pchantlvout
->chanscanparam
));
625 /* Increment the TLV header length by the size appended */
626 /* Ew, it would be _so_ nice if we could just declare the
627 variable little-endian and let GCC handle it for us */
628 pchantlvout
->header
.len
=
629 cpu_to_le16(le16_to_cpu(pchantlvout
->header
.len
) +
630 sizeof(pchantlvout
->chanscanparam
));
633 * The tlv buffer length is set to the number of bytes of the
634 * between the channel tlv pointer and the start of the
635 * tlv buffer. This compensates for any TLVs that were appended
636 * before the channel list.
638 pscancfgout
->tlvbufferlen
= ((u8
*) pchantlvout
639 - pscancfgout
->tlvbuffer
);
641 /* Add the size of the channel tlv header and the data length */
642 pscancfgout
->tlvbufferlen
+=
643 (sizeof(pchantlvout
->header
)
644 + le16_to_cpu(pchantlvout
->header
.len
));
646 /* Increment the index to the channel tlv we are constructing */
651 /* Stop the loop if the *current* channel is in the 1,6,11 set
652 * and we are not filtering on a BSSID or SSID.
654 if (!filteredscan
&& (ptmpchan
->channumber
== 1
655 || ptmpchan
->channumber
== 6
656 || ptmpchan
->channumber
== 11)) {
660 /* Increment the tmp pointer to the next channel to be scanned */
664 /* Stop the loop if the *next* channel is in the 1,6,11 set.
665 * This will cause it to be the only channel scanned on the next
668 if (!filteredscan
&& (ptmpchan
->channumber
== 1
669 || ptmpchan
->channumber
== 6
670 || ptmpchan
->channumber
== 11)) {
675 /* Send the scan command to the firmware with the specified cfg */
676 ret
= libertas_prepare_and_send_command(priv
, CMD_802_11_SCAN
, 0,
678 if (scanned
>= 2 && !full_scan
) {
686 priv
->adapter
->last_scanned_channel
= ptmpchan
->channumber
;
688 if (priv
->adapter
->last_scanned_channel
) {
689 /* Schedule the next part of the partial scan */
690 if (!full_scan
&& !priv
->adapter
->surpriseremoved
) {
691 cancel_delayed_work(&priv
->scan_work
);
692 queue_delayed_work(priv
->work_thread
, &priv
->scan_work
,
693 msecs_to_jiffies(300));
696 /* All done, tell userspace the scan table has been updated */
697 memset(&wrqu
, 0, sizeof(union iwreq_data
));
698 wireless_send_event(priv
->dev
, SIOCGIWSCAN
, &wrqu
, NULL
);
701 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
706 clear_selected_scan_list_entries(wlan_adapter
* adapter
,
707 const struct wlan_ioctl_user_scan_cfg
* scan_cfg
)
709 struct bss_descriptor
* bss
;
710 struct bss_descriptor
* safe
;
711 u32 clear_ssid_flag
= 0, clear_bssid_flag
= 0;
716 if (scan_cfg
->clear_ssid
&& scan_cfg
->ssid_len
)
719 if (scan_cfg
->clear_bssid
720 && (compare_ether_addr(scan_cfg
->bssid
, &zeromac
[0]) != 0)
721 && (compare_ether_addr(scan_cfg
->bssid
, &bcastmac
[0]) != 0)) {
722 clear_bssid_flag
= 1;
725 if (!clear_ssid_flag
&& !clear_bssid_flag
)
728 mutex_lock(&adapter
->lock
);
729 list_for_each_entry_safe (bss
, safe
, &adapter
->network_list
, list
) {
732 /* Check for an SSID match */
734 && (bss
->ssid_len
== scan_cfg
->ssid_len
)
735 && !memcmp(bss
->ssid
, scan_cfg
->ssid
, bss
->ssid_len
))
738 /* Check for a BSSID match */
739 if ( clear_bssid_flag
740 && !compare_ether_addr(bss
->bssid
, scan_cfg
->bssid
))
744 list_move_tail (&bss
->list
, &adapter
->network_free_list
);
745 clear_bss_descriptor(bss
);
748 mutex_unlock(&adapter
->lock
);
753 * @brief Internal function used to start a scan based on an input config
755 * Use the input user scan configuration information when provided in
756 * order to send the appropriate scan commands to firmware to populate or
757 * update the internal driver scan table
759 * @param priv A pointer to wlan_private structure
760 * @param puserscanin Pointer to the input configuration for the requested
763 * @return 0 or < 0 if error
765 int wlan_scan_networks(wlan_private
* priv
,
766 const struct wlan_ioctl_user_scan_cfg
* puserscanin
,
769 wlan_adapter
* adapter
= priv
->adapter
;
770 struct mrvlietypes_chanlistparamset
*pchantlvout
;
771 struct chanscanparamset
* scan_chan_list
= NULL
;
772 struct wlan_scan_cmd_config
* scan_cfg
= NULL
;
774 u8 scancurrentchanonly
;
777 #ifdef CONFIG_LIBERTAS_DEBUG
778 struct bss_descriptor
* iter_bss
;
780 DECLARE_MAC_BUF(mac
);
783 lbs_deb_enter(LBS_DEB_SCAN
);
785 /* Cancel any partial outstanding partial scans if this scan
788 if (full_scan
&& delayed_work_pending(&priv
->scan_work
))
789 cancel_delayed_work(&priv
->scan_work
);
791 scan_chan_list
= kzalloc(sizeof(struct chanscanparamset
) *
792 WLAN_IOCTL_USER_SCAN_CHAN_MAX
, GFP_KERNEL
);
793 if (scan_chan_list
== NULL
) {
798 scan_cfg
= wlan_scan_setup_scan_config(priv
,
804 &scancurrentchanonly
);
805 if (scan_cfg
== NULL
) {
810 clear_selected_scan_list_entries(adapter
, puserscanin
);
812 /* Keep the data path active if we are only scanning our current channel */
813 if (!scancurrentchanonly
) {
814 netif_stop_queue(priv
->dev
);
815 netif_carrier_off(priv
->dev
);
816 if (priv
->mesh_dev
) {
817 netif_stop_queue(priv
->mesh_dev
);
818 netif_carrier_off(priv
->mesh_dev
);
822 ret
= wlan_scan_channel_list(priv
,
831 #ifdef CONFIG_LIBERTAS_DEBUG
832 /* Dump the scan table */
833 mutex_lock(&adapter
->lock
);
834 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
835 lbs_deb_scan("Scan:(%02d) %s, RSSI[%03d], SSID[%s]\n",
836 i
++, print_mac(mac
, iter_bss
->bssid
), (s32
) iter_bss
->rssi
,
837 escape_essid(iter_bss
->ssid
, iter_bss
->ssid_len
));
839 mutex_unlock(&adapter
->lock
);
842 if (priv
->adapter
->connect_status
== LIBERTAS_CONNECTED
) {
843 netif_carrier_on(priv
->dev
);
844 netif_wake_queue(priv
->dev
);
845 if (priv
->mesh_dev
) {
846 netif_carrier_on(priv
->mesh_dev
);
847 netif_wake_queue(priv
->mesh_dev
);
856 kfree(scan_chan_list
);
858 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
863 * @brief Interpret a BSS scan response returned from the firmware
865 * Parse the various fixed fields and IEs passed back for a a BSS probe
866 * response or beacon from the scan command. Record information as needed
867 * in the scan table struct bss_descriptor for that entry.
869 * @param bss Output parameter: Pointer to the BSS Entry
873 static int libertas_process_bss(struct bss_descriptor
* bss
,
874 u8
** pbeaconinfo
, int *bytesleft
)
876 struct ieeetypes_fhparamset
*pFH
;
877 struct ieeetypes_dsparamset
*pDS
;
878 struct ieeetypes_cfparamset
*pCF
;
879 struct ieeetypes_ibssparamset
*pibss
;
880 DECLARE_MAC_BUF(mac
);
881 struct ieeetypes_countryinfoset
*pcountryinfo
;
883 u8 n_ex_rates
= 0, got_basic_rates
= 0, n_basic_rates
= 0;
887 lbs_deb_enter(LBS_DEB_ASSOC
);
889 if (*bytesleft
>= sizeof(beaconsize
)) {
890 /* Extract & convert beacon size from the command buffer */
891 beaconsize
= le16_to_cpup((void *)*pbeaconinfo
);
892 *bytesleft
-= sizeof(beaconsize
);
893 *pbeaconinfo
+= sizeof(beaconsize
);
896 if (beaconsize
== 0 || beaconsize
> *bytesleft
) {
897 *pbeaconinfo
+= *bytesleft
;
902 /* Initialize the current working beacon pointer for this BSS iteration */
904 end
= pos
+ beaconsize
;
906 /* Advance the return beacon pointer past the current beacon */
907 *pbeaconinfo
+= beaconsize
;
908 *bytesleft
-= beaconsize
;
910 memcpy(bss
->bssid
, pos
, ETH_ALEN
);
911 lbs_deb_scan("process_bss: AP BSSID %s\n", print_mac(mac
, bss
->bssid
));
914 if ((end
- pos
) < 12) {
915 lbs_deb_scan("process_bss: Not enough bytes left\n");
920 * next 4 fields are RSSI, time stamp, beacon interval,
921 * and capability information
924 /* RSSI is 1 byte long */
926 lbs_deb_scan("process_bss: RSSI=%02X\n", *pos
);
929 /* time stamp is 8 bytes long */
932 /* beacon interval is 2 bytes long */
933 bss
->beaconperiod
= le16_to_cpup((void *) pos
);
936 /* capability information is 2 bytes long */
937 bss
->capability
= le16_to_cpup((void *) pos
);
938 lbs_deb_scan("process_bss: capabilities = 0x%4X\n", bss
->capability
);
941 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
)
942 lbs_deb_scan("process_bss: AP WEP enabled\n");
943 if (bss
->capability
& WLAN_CAPABILITY_IBSS
)
944 bss
->mode
= IW_MODE_ADHOC
;
946 bss
->mode
= IW_MODE_INFRA
;
948 /* rest of the current buffer are IE's */
949 lbs_deb_scan("process_bss: IE length for this AP = %zd\n", end
- pos
);
950 lbs_deb_hex(LBS_DEB_SCAN
, "process_bss: IE info", pos
, end
- pos
);
952 /* process variable IE */
953 while (pos
<= end
- 2) {
954 struct ieee80211_info_element
* elem
=
955 (struct ieee80211_info_element
*) pos
;
957 if (pos
+ elem
->len
> end
) {
958 lbs_deb_scan("process_bss: error in processing IE, "
959 "bytes left < IE length\n");
965 bss
->ssid_len
= elem
->len
;
966 memcpy(bss
->ssid
, elem
->data
, elem
->len
);
967 lbs_deb_scan("ssid '%s', ssid length %u\n",
968 escape_essid(bss
->ssid
, bss
->ssid_len
),
972 case MFIE_TYPE_RATES
:
973 n_basic_rates
= min_t(u8
, MAX_RATES
, elem
->len
);
974 memcpy(bss
->rates
, elem
->data
, n_basic_rates
);
978 case MFIE_TYPE_FH_SET
:
979 pFH
= (struct ieeetypes_fhparamset
*) pos
;
980 memmove(&bss
->phyparamset
.fhparamset
, pFH
,
981 sizeof(struct ieeetypes_fhparamset
));
982 #if 0 /* I think we can store these LE */
983 bss
->phyparamset
.fhparamset
.dwelltime
984 = le16_to_cpu(bss
->phyparamset
.fhparamset
.dwelltime
);
988 case MFIE_TYPE_DS_SET
:
989 pDS
= (struct ieeetypes_dsparamset
*) pos
;
990 bss
->channel
= pDS
->currentchan
;
991 memcpy(&bss
->phyparamset
.dsparamset
, pDS
,
992 sizeof(struct ieeetypes_dsparamset
));
995 case MFIE_TYPE_CF_SET
:
996 pCF
= (struct ieeetypes_cfparamset
*) pos
;
997 memcpy(&bss
->ssparamset
.cfparamset
, pCF
,
998 sizeof(struct ieeetypes_cfparamset
));
1001 case MFIE_TYPE_IBSS_SET
:
1002 pibss
= (struct ieeetypes_ibssparamset
*) pos
;
1003 bss
->atimwindow
= le32_to_cpu(pibss
->atimwindow
);
1004 memmove(&bss
->ssparamset
.ibssparamset
, pibss
,
1005 sizeof(struct ieeetypes_ibssparamset
));
1007 bss
->ssparamset
.ibssparamset
.atimwindow
1008 = le16_to_cpu(bss
->ssparamset
.ibssparamset
.atimwindow
);
1012 case MFIE_TYPE_COUNTRY
:
1013 pcountryinfo
= (struct ieeetypes_countryinfoset
*) pos
;
1014 if (pcountryinfo
->len
< sizeof(pcountryinfo
->countrycode
)
1015 || pcountryinfo
->len
> 254) {
1016 lbs_deb_scan("process_bss: 11D- Err "
1017 "CountryInfo len =%d min=%zd max=254\n",
1019 sizeof(pcountryinfo
->countrycode
));
1024 memcpy(&bss
->countryinfo
,
1025 pcountryinfo
, pcountryinfo
->len
+ 2);
1026 lbs_deb_hex(LBS_DEB_SCAN
, "process_bss: 11d countryinfo",
1027 (u8
*) pcountryinfo
,
1028 (u32
) (pcountryinfo
->len
+ 2));
1031 case MFIE_TYPE_RATES_EX
:
1032 /* only process extended supported rate if data rate is
1033 * already found. Data rate IE should come before
1034 * extended supported rate IE
1036 if (!got_basic_rates
)
1039 n_ex_rates
= elem
->len
;
1040 if (n_basic_rates
+ n_ex_rates
> MAX_RATES
)
1041 n_ex_rates
= MAX_RATES
- n_basic_rates
;
1043 p
= bss
->rates
+ n_basic_rates
;
1044 memcpy(p
, elem
->data
, n_ex_rates
);
1047 case MFIE_TYPE_GENERIC
:
1048 if (elem
->len
>= 4 &&
1049 elem
->data
[0] == 0x00 &&
1050 elem
->data
[1] == 0x50 &&
1051 elem
->data
[2] == 0xf2 &&
1052 elem
->data
[3] == 0x01) {
1053 bss
->wpa_ie_len
= min(elem
->len
+ 2,
1055 memcpy(bss
->wpa_ie
, elem
, bss
->wpa_ie_len
);
1056 lbs_deb_hex(LBS_DEB_SCAN
, "process_bss: WPA IE", bss
->wpa_ie
,
1058 } else if (elem
->len
>= MARVELL_MESH_IE_LENGTH
&&
1059 elem
->data
[0] == 0x00 &&
1060 elem
->data
[1] == 0x50 &&
1061 elem
->data
[2] == 0x43 &&
1062 elem
->data
[3] == 0x04) {
1068 bss
->rsn_ie_len
= min(elem
->len
+ 2, MAX_WPA_IE_LEN
);
1069 memcpy(bss
->rsn_ie
, elem
, bss
->rsn_ie_len
);
1070 lbs_deb_hex(LBS_DEB_SCAN
, "process_bss: RSN_IE", bss
->rsn_ie
, elem
->len
);
1077 pos
+= elem
->len
+ 2;
1081 bss
->last_scanned
= jiffies
;
1082 libertas_unset_basic_rate_flags(bss
->rates
, sizeof(bss
->rates
));
1087 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
1092 * @brief Compare two SSIDs
1094 * @param ssid1 A pointer to ssid to compare
1095 * @param ssid2 A pointer to ssid to compare
1097 * @return 0--ssid is same, otherwise is different
1099 int libertas_ssid_cmp(u8
*ssid1
, u8 ssid1_len
, u8
*ssid2
, u8 ssid2_len
)
1101 if (ssid1_len
!= ssid2_len
)
1104 return memcmp(ssid1
, ssid2
, ssid1_len
);
1108 * @brief This function finds a specific compatible BSSID in the scan list
1110 * @param adapter A pointer to wlan_adapter
1111 * @param bssid BSSID to find in the scan list
1112 * @param mode Network mode: Infrastructure or IBSS
1114 * @return index in BSSID list, or error return code (< 0)
1116 struct bss_descriptor
* libertas_find_bssid_in_list(wlan_adapter
* adapter
,
1117 u8
* bssid
, u8 mode
)
1119 struct bss_descriptor
* iter_bss
;
1120 struct bss_descriptor
* found_bss
= NULL
;
1125 lbs_deb_hex(LBS_DEB_SCAN
, "looking for",
1128 /* Look through the scan table for a compatible match. The loop will
1129 * continue past a matched bssid that is not compatible in case there
1130 * is an AP with multiple SSIDs assigned to the same BSSID
1132 mutex_lock(&adapter
->lock
);
1133 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1134 if (compare_ether_addr(iter_bss
->bssid
, bssid
))
1135 continue; /* bssid doesn't match */
1139 if (!is_network_compatible(adapter
, iter_bss
, mode
))
1141 found_bss
= iter_bss
;
1144 found_bss
= iter_bss
;
1148 mutex_unlock(&adapter
->lock
);
1154 * @brief This function finds ssid in ssid list.
1156 * @param adapter A pointer to wlan_adapter
1157 * @param ssid SSID to find in the list
1158 * @param bssid BSSID to qualify the SSID selection (if provided)
1159 * @param mode Network mode: Infrastructure or IBSS
1161 * @return index in BSSID list
1163 struct bss_descriptor
* libertas_find_ssid_in_list(wlan_adapter
* adapter
,
1164 u8
*ssid
, u8 ssid_len
, u8
* bssid
, u8 mode
,
1168 struct bss_descriptor
* iter_bss
= NULL
;
1169 struct bss_descriptor
* found_bss
= NULL
;
1170 struct bss_descriptor
* tmp_oldest
= NULL
;
1172 mutex_lock(&adapter
->lock
);
1174 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1176 || (iter_bss
->last_scanned
< tmp_oldest
->last_scanned
))
1177 tmp_oldest
= iter_bss
;
1179 if (libertas_ssid_cmp(iter_bss
->ssid
, iter_bss
->ssid_len
,
1180 ssid
, ssid_len
) != 0)
1181 continue; /* ssid doesn't match */
1182 if (bssid
&& compare_ether_addr(iter_bss
->bssid
, bssid
) != 0)
1183 continue; /* bssid doesn't match */
1184 if ((channel
> 0) && (iter_bss
->channel
!= channel
))
1185 continue; /* channel doesn't match */
1190 if (!is_network_compatible(adapter
, iter_bss
, mode
))
1194 /* Found requested BSSID */
1195 found_bss
= iter_bss
;
1199 if (SCAN_RSSI(iter_bss
->rssi
) > bestrssi
) {
1200 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1201 found_bss
= iter_bss
;
1206 if (SCAN_RSSI(iter_bss
->rssi
) > bestrssi
) {
1207 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1208 found_bss
= iter_bss
;
1215 mutex_unlock(&adapter
->lock
);
1220 * @brief This function finds the best SSID in the Scan List
1222 * Search the scan table for the best SSID that also matches the current
1223 * adapter network preference (infrastructure or adhoc)
1225 * @param adapter A pointer to wlan_adapter
1227 * @return index in BSSID list
1229 static struct bss_descriptor
* libertas_find_best_ssid_in_list(wlan_adapter
* adapter
,
1233 struct bss_descriptor
* iter_bss
;
1234 struct bss_descriptor
* best_bss
= NULL
;
1236 mutex_lock(&adapter
->lock
);
1238 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1242 if (!is_network_compatible(adapter
, iter_bss
, mode
))
1244 if (SCAN_RSSI(iter_bss
->rssi
) <= bestrssi
)
1246 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1247 best_bss
= iter_bss
;
1251 if (SCAN_RSSI(iter_bss
->rssi
) <= bestrssi
)
1253 bestrssi
= SCAN_RSSI(iter_bss
->rssi
);
1254 best_bss
= iter_bss
;
1259 mutex_unlock(&adapter
->lock
);
1264 * @brief Find the AP with specific ssid in the scan list
1266 * @param priv A pointer to wlan_private structure
1267 * @param pSSID A pointer to AP's ssid
1269 * @return 0--success, otherwise--fail
1271 int libertas_find_best_network_ssid(wlan_private
* priv
,
1272 u8
*out_ssid
, u8
*out_ssid_len
, u8 preferred_mode
, u8
*out_mode
)
1274 wlan_adapter
*adapter
= priv
->adapter
;
1276 struct bss_descriptor
* found
;
1278 lbs_deb_enter(LBS_DEB_ASSOC
);
1280 wlan_scan_networks(priv
, NULL
, 1);
1281 if (adapter
->surpriseremoved
)
1284 wait_event_interruptible(adapter
->cmd_pending
, !adapter
->nr_cmd_pending
);
1286 found
= libertas_find_best_ssid_in_list(adapter
, preferred_mode
);
1287 if (found
&& (found
->ssid_len
> 0)) {
1288 memcpy(out_ssid
, &found
->ssid
, IW_ESSID_MAX_SIZE
);
1289 *out_ssid_len
= found
->ssid_len
;
1290 *out_mode
= found
->mode
;
1294 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);
1299 * @brief Scan Network
1301 * @param dev A pointer to net_device structure
1302 * @param info A pointer to iw_request_info structure
1303 * @param vwrq A pointer to iw_param structure
1304 * @param extra A pointer to extra data buf
1306 * @return 0 --success, otherwise fail
1308 int libertas_set_scan(struct net_device
*dev
, struct iw_request_info
*info
,
1309 struct iw_param
*vwrq
, char *extra
)
1311 wlan_private
*priv
= dev
->priv
;
1312 wlan_adapter
*adapter
= priv
->adapter
;
1314 lbs_deb_enter(LBS_DEB_SCAN
);
1316 if (!delayed_work_pending(&priv
->scan_work
)) {
1317 queue_delayed_work(priv
->work_thread
, &priv
->scan_work
,
1318 msecs_to_jiffies(50));
1321 if (adapter
->surpriseremoved
)
1324 lbs_deb_leave(LBS_DEB_SCAN
);
1329 * @brief Send a scan command for all available channels filtered on a spec
1331 * @param priv A pointer to wlan_private structure
1332 * @param prequestedssid A pointer to AP's ssid
1333 * @param keeppreviousscan Flag used to save/clear scan table before scan
1335 * @return 0-success, otherwise fail
1337 int libertas_send_specific_ssid_scan(wlan_private
* priv
,
1338 u8
*ssid
, u8 ssid_len
, u8 clear_ssid
)
1340 wlan_adapter
*adapter
= priv
->adapter
;
1341 struct wlan_ioctl_user_scan_cfg scancfg
;
1344 lbs_deb_enter(LBS_DEB_ASSOC
);
1349 memset(&scancfg
, 0x00, sizeof(scancfg
));
1350 memcpy(scancfg
.ssid
, ssid
, ssid_len
);
1351 scancfg
.ssid_len
= ssid_len
;
1352 scancfg
.clear_ssid
= clear_ssid
;
1354 wlan_scan_networks(priv
, &scancfg
, 1);
1355 if (adapter
->surpriseremoved
)
1357 wait_event_interruptible(adapter
->cmd_pending
, !adapter
->nr_cmd_pending
);
1360 lbs_deb_leave(LBS_DEB_ASSOC
);
1364 #define MAX_CUSTOM_LEN 64
1366 static inline char *libertas_translate_scan(wlan_private
*priv
,
1367 char *start
, char *stop
,
1368 struct bss_descriptor
*bss
)
1370 wlan_adapter
*adapter
= priv
->adapter
;
1371 struct chan_freq_power
*cfp
;
1372 char *current_val
; /* For rates */
1373 struct iw_event iwe
; /* Temporary buffer */
1375 #define PERFECT_RSSI ((u8)50)
1376 #define WORST_RSSI ((u8)0)
1377 #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
1380 cfp
= libertas_find_cfp_by_band_and_channel(adapter
, 0, bss
->channel
);
1382 lbs_deb_scan("Invalid channel number %d\n", bss
->channel
);
1386 /* First entry *MUST* be the AP BSSID */
1387 iwe
.cmd
= SIOCGIWAP
;
1388 iwe
.u
.ap_addr
.sa_family
= ARPHRD_ETHER
;
1389 memcpy(iwe
.u
.ap_addr
.sa_data
, &bss
->bssid
, ETH_ALEN
);
1390 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_ADDR_LEN
);
1393 iwe
.cmd
= SIOCGIWESSID
;
1394 iwe
.u
.data
.flags
= 1;
1395 iwe
.u
.data
.length
= min((u32
) bss
->ssid_len
, (u32
) IW_ESSID_MAX_SIZE
);
1396 start
= iwe_stream_add_point(start
, stop
, &iwe
, bss
->ssid
);
1399 iwe
.cmd
= SIOCGIWMODE
;
1400 iwe
.u
.mode
= bss
->mode
;
1401 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_UINT_LEN
);
1404 iwe
.cmd
= SIOCGIWFREQ
;
1405 iwe
.u
.freq
.m
= (long)cfp
->freq
* 100000;
1407 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_FREQ_LEN
);
1409 /* Add quality statistics */
1411 iwe
.u
.qual
.updated
= IW_QUAL_ALL_UPDATED
;
1412 iwe
.u
.qual
.level
= SCAN_RSSI(bss
->rssi
);
1414 rssi
= iwe
.u
.qual
.level
- MRVDRV_NF_DEFAULT_SCAN_VALUE
;
1416 (100 * RSSI_DIFF
* RSSI_DIFF
- (PERFECT_RSSI
- rssi
) *
1417 (15 * (RSSI_DIFF
) + 62 * (PERFECT_RSSI
- rssi
))) /
1418 (RSSI_DIFF
* RSSI_DIFF
);
1419 if (iwe
.u
.qual
.qual
> 100)
1420 iwe
.u
.qual
.qual
= 100;
1422 if (adapter
->NF
[TYPE_BEACON
][TYPE_NOAVG
] == 0) {
1423 iwe
.u
.qual
.noise
= MRVDRV_NF_DEFAULT_SCAN_VALUE
;
1426 CAL_NF(adapter
->NF
[TYPE_BEACON
][TYPE_NOAVG
]);
1429 /* Locally created ad-hoc BSSs won't have beacons if this is the
1430 * only station in the adhoc network; so get signal strength
1431 * from receive statistics.
1433 if ((adapter
->mode
== IW_MODE_ADHOC
)
1434 && adapter
->adhoccreate
1435 && !libertas_ssid_cmp(adapter
->curbssparams
.ssid
,
1436 adapter
->curbssparams
.ssid_len
,
1437 bss
->ssid
, bss
->ssid_len
)) {
1439 snr
= adapter
->SNR
[TYPE_RXPD
][TYPE_AVG
] / AVG_SCALE
;
1440 nf
= adapter
->NF
[TYPE_RXPD
][TYPE_AVG
] / AVG_SCALE
;
1441 iwe
.u
.qual
.level
= CAL_RSSI(snr
, nf
);
1443 start
= iwe_stream_add_event(start
, stop
, &iwe
, IW_EV_QUAL_LEN
);
1445 /* Add encryption capability */
1446 iwe
.cmd
= SIOCGIWENCODE
;
1447 if (bss
->capability
& WLAN_CAPABILITY_PRIVACY
) {
1448 iwe
.u
.data
.flags
= IW_ENCODE_ENABLED
| IW_ENCODE_NOKEY
;
1450 iwe
.u
.data
.flags
= IW_ENCODE_DISABLED
;
1452 iwe
.u
.data
.length
= 0;
1453 start
= iwe_stream_add_point(start
, stop
, &iwe
, bss
->ssid
);
1455 current_val
= start
+ IW_EV_LCP_LEN
;
1457 iwe
.cmd
= SIOCGIWRATE
;
1458 iwe
.u
.bitrate
.fixed
= 0;
1459 iwe
.u
.bitrate
.disabled
= 0;
1460 iwe
.u
.bitrate
.value
= 0;
1462 for (j
= 0; bss
->rates
[j
] && (j
< sizeof(bss
->rates
)); j
++) {
1463 /* Bit rate given in 500 kb/s units */
1464 iwe
.u
.bitrate
.value
= bss
->rates
[j
] * 500000;
1465 current_val
= iwe_stream_add_value(start
, current_val
,
1466 stop
, &iwe
, IW_EV_PARAM_LEN
);
1468 if ((bss
->mode
== IW_MODE_ADHOC
)
1469 && !libertas_ssid_cmp(adapter
->curbssparams
.ssid
,
1470 adapter
->curbssparams
.ssid_len
,
1471 bss
->ssid
, bss
->ssid_len
)
1472 && adapter
->adhoccreate
) {
1473 iwe
.u
.bitrate
.value
= 22 * 500000;
1474 current_val
= iwe_stream_add_value(start
, current_val
,
1475 stop
, &iwe
, IW_EV_PARAM_LEN
);
1477 /* Check if we added any event */
1478 if((current_val
- start
) > IW_EV_LCP_LEN
)
1479 start
= current_val
;
1481 memset(&iwe
, 0, sizeof(iwe
));
1482 if (bss
->wpa_ie_len
) {
1483 char buf
[MAX_WPA_IE_LEN
];
1484 memcpy(buf
, bss
->wpa_ie
, bss
->wpa_ie_len
);
1485 iwe
.cmd
= IWEVGENIE
;
1486 iwe
.u
.data
.length
= bss
->wpa_ie_len
;
1487 start
= iwe_stream_add_point(start
, stop
, &iwe
, buf
);
1490 memset(&iwe
, 0, sizeof(iwe
));
1491 if (bss
->rsn_ie_len
) {
1492 char buf
[MAX_WPA_IE_LEN
];
1493 memcpy(buf
, bss
->rsn_ie
, bss
->rsn_ie_len
);
1494 iwe
.cmd
= IWEVGENIE
;
1495 iwe
.u
.data
.length
= bss
->rsn_ie_len
;
1496 start
= iwe_stream_add_point(start
, stop
, &iwe
, buf
);
1500 char custom
[MAX_CUSTOM_LEN
];
1503 iwe
.cmd
= IWEVCUSTOM
;
1504 p
+= snprintf(p
, MAX_CUSTOM_LEN
- (p
- custom
),
1506 iwe
.u
.data
.length
= p
- custom
;
1507 if (iwe
.u
.data
.length
)
1508 start
= iwe_stream_add_point(start
, stop
, &iwe
, custom
);
1515 * @brief Retrieve the scan table entries via wireless tools IOCTL call
1517 * @param dev A pointer to net_device structure
1518 * @param info A pointer to iw_request_info structure
1519 * @param dwrq A pointer to iw_point structure
1520 * @param extra A pointer to extra data buf
1522 * @return 0 --success, otherwise fail
1524 int libertas_get_scan(struct net_device
*dev
, struct iw_request_info
*info
,
1525 struct iw_point
*dwrq
, char *extra
)
1527 #define SCAN_ITEM_SIZE 128
1528 wlan_private
*priv
= dev
->priv
;
1529 wlan_adapter
*adapter
= priv
->adapter
;
1532 char *stop
= ev
+ dwrq
->length
;
1533 struct bss_descriptor
* iter_bss
;
1534 struct bss_descriptor
* safe
;
1536 lbs_deb_enter(LBS_DEB_ASSOC
);
1538 /* Update RSSI if current BSS is a locally created ad-hoc BSS */
1539 if ((adapter
->mode
== IW_MODE_ADHOC
) && adapter
->adhoccreate
) {
1540 libertas_prepare_and_send_command(priv
, CMD_802_11_RSSI
, 0,
1541 CMD_OPTION_WAITFORRSP
, 0, NULL
);
1544 mutex_lock(&adapter
->lock
);
1545 list_for_each_entry_safe (iter_bss
, safe
, &adapter
->network_list
, list
) {
1547 unsigned long stale_time
;
1549 if (stop
- ev
< SCAN_ITEM_SIZE
) {
1554 /* For mesh device, list only mesh networks */
1555 if (dev
== priv
->mesh_dev
&& !iter_bss
->mesh
)
1558 /* Prune old an old scan result */
1559 stale_time
= iter_bss
->last_scanned
+ DEFAULT_MAX_SCAN_AGE
;
1560 if (time_after(jiffies
, stale_time
)) {
1561 list_move_tail (&iter_bss
->list
,
1562 &adapter
->network_free_list
);
1563 clear_bss_descriptor(iter_bss
);
1567 /* Translate to WE format this entry */
1568 next_ev
= libertas_translate_scan(priv
, ev
, stop
, iter_bss
);
1569 if (next_ev
== NULL
)
1573 mutex_unlock(&adapter
->lock
);
1575 dwrq
->length
= (ev
- extra
);
1578 lbs_deb_leave(LBS_DEB_ASSOC
);
1583 * @brief Prepare a scan command to be sent to the firmware
1585 * Use the wlan_scan_cmd_config sent to the command processing module in
1586 * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1587 * struct to send to firmware.
1589 * The fixed fields specifying the BSS type and BSSID filters as well as a
1590 * variable number/length of TLVs are sent in the command to firmware.
1592 * @param priv A pointer to wlan_private structure
1593 * @param cmd A pointer to cmd_ds_command structure to be sent to
1594 * firmware with the cmd_DS_801_11_SCAN structure
1595 * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used
1596 * to set the fields/TLVs for the command sent to firmware
1600 * @sa wlan_scan_create_channel_list
1602 int libertas_cmd_80211_scan(wlan_private
* priv
,
1603 struct cmd_ds_command
*cmd
, void *pdata_buf
)
1605 struct cmd_ds_802_11_scan
*pscan
= &cmd
->params
.scan
;
1606 struct wlan_scan_cmd_config
*pscancfg
;
1608 lbs_deb_enter(LBS_DEB_ASSOC
);
1610 pscancfg
= pdata_buf
;
1612 /* Set fixed field variables in scan command */
1613 pscan
->bsstype
= pscancfg
->bsstype
;
1614 memcpy(pscan
->bssid
, pscancfg
->bssid
, ETH_ALEN
);
1615 memcpy(pscan
->tlvbuffer
, pscancfg
->tlvbuffer
, pscancfg
->tlvbufferlen
);
1617 cmd
->command
= cpu_to_le16(CMD_802_11_SCAN
);
1619 /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1620 cmd
->size
= cpu_to_le16(sizeof(pscan
->bsstype
) + ETH_ALEN
1621 + pscancfg
->tlvbufferlen
+ S_DS_GEN
);
1623 lbs_deb_scan("SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
1624 le16_to_cpu(cmd
->command
), le16_to_cpu(cmd
->size
),
1625 le16_to_cpu(cmd
->seqnum
));
1627 lbs_deb_leave(LBS_DEB_ASSOC
);
1631 static inline int is_same_network(struct bss_descriptor
*src
,
1632 struct bss_descriptor
*dst
)
1634 /* A network is only a duplicate if the channel, BSSID, and ESSID
1635 * all match. We treat all <hidden> with the same BSSID and channel
1637 return ((src
->ssid_len
== dst
->ssid_len
) &&
1638 (src
->channel
== dst
->channel
) &&
1639 !compare_ether_addr(src
->bssid
, dst
->bssid
) &&
1640 !memcmp(src
->ssid
, dst
->ssid
, src
->ssid_len
));
1644 * @brief This function handles the command response of scan
1646 * The response buffer for the scan command has the following
1649 * .-----------------------------------------------------------.
1650 * | header (4 * sizeof(u16)): Standard command response hdr |
1651 * .-----------------------------------------------------------.
1652 * | bufsize (u16) : sizeof the BSS Description data |
1653 * .-----------------------------------------------------------.
1654 * | NumOfSet (u8) : Number of BSS Descs returned |
1655 * .-----------------------------------------------------------.
1656 * | BSSDescription data (variable, size given in bufsize) |
1657 * .-----------------------------------------------------------.
1658 * | TLV data (variable, size calculated using header->size, |
1659 * | bufsize and sizeof the fixed fields above) |
1660 * .-----------------------------------------------------------.
1662 * @param priv A pointer to wlan_private structure
1663 * @param resp A pointer to cmd_ds_command
1667 int libertas_ret_80211_scan(wlan_private
* priv
, struct cmd_ds_command
*resp
)
1669 wlan_adapter
*adapter
= priv
->adapter
;
1670 struct cmd_ds_802_11_scan_rsp
*pscan
;
1671 struct bss_descriptor
* iter_bss
;
1672 struct bss_descriptor
* safe
;
1680 lbs_deb_enter(LBS_DEB_ASSOC
);
1682 /* Prune old entries from scan table */
1683 list_for_each_entry_safe (iter_bss
, safe
, &adapter
->network_list
, list
) {
1684 unsigned long stale_time
= iter_bss
->last_scanned
+ DEFAULT_MAX_SCAN_AGE
;
1685 if (time_before(jiffies
, stale_time
))
1687 list_move_tail (&iter_bss
->list
, &adapter
->network_free_list
);
1688 clear_bss_descriptor(iter_bss
);
1691 pscan
= &resp
->params
.scanresp
;
1693 if (pscan
->nr_sets
> MAX_NETWORK_COUNT
) {
1695 "SCAN_RESP: too many scan results (%d, max %d)!!\n",
1696 pscan
->nr_sets
, MAX_NETWORK_COUNT
);
1701 bytesleft
= le16_to_cpu(pscan
->bssdescriptsize
);
1702 lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft
);
1704 scanrespsize
= le16_to_cpu(resp
->size
);
1705 lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n",
1708 pbssinfo
= pscan
->bssdesc_and_tlvbuffer
;
1710 /* The size of the TLV buffer is equal to the entire command response
1711 * size (scanrespsize) minus the fixed fields (sizeof()'s), the
1712 * BSS Descriptions (bssdescriptsize as bytesLef) and the command
1713 * response header (S_DS_GEN)
1715 tlvbufsize
= scanrespsize
- (bytesleft
+ sizeof(pscan
->bssdescriptsize
)
1716 + sizeof(pscan
->nr_sets
)
1720 * Process each scan response returned (pscan->nr_sets). Save
1721 * the information in the newbssentry and then insert into the
1722 * driver scan table either as an update to an existing entry
1723 * or as an addition at the end of the table
1725 for (idx
= 0; idx
< pscan
->nr_sets
&& bytesleft
; idx
++) {
1726 struct bss_descriptor
new;
1727 struct bss_descriptor
* found
= NULL
;
1728 struct bss_descriptor
* oldest
= NULL
;
1729 DECLARE_MAC_BUF(mac
);
1731 /* Process the data fields and IEs returned for this BSS */
1732 memset(&new, 0, sizeof (struct bss_descriptor
));
1733 if (libertas_process_bss(&new, &pbssinfo
, &bytesleft
) != 0) {
1734 /* error parsing the scan response, skipped */
1735 lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n");
1739 /* Try to find this bss in the scan table */
1740 list_for_each_entry (iter_bss
, &adapter
->network_list
, list
) {
1741 if (is_same_network(iter_bss
, &new)) {
1746 if ((oldest
== NULL
) ||
1747 (iter_bss
->last_scanned
< oldest
->last_scanned
))
1752 /* found, clear it */
1753 clear_bss_descriptor(found
);
1754 } else if (!list_empty(&adapter
->network_free_list
)) {
1755 /* Pull one from the free list */
1756 found
= list_entry(adapter
->network_free_list
.next
,
1757 struct bss_descriptor
, list
);
1758 list_move_tail(&found
->list
, &adapter
->network_list
);
1759 } else if (oldest
) {
1760 /* If there are no more slots, expire the oldest */
1762 clear_bss_descriptor(found
);
1763 list_move_tail(&found
->list
, &adapter
->network_list
);
1768 lbs_deb_scan("SCAN_RESP: BSSID = %s\n",
1769 print_mac(mac
, new.bssid
));
1771 /* Copy the locally created newbssentry to the scan table */
1772 memcpy(found
, &new, offsetof(struct bss_descriptor
, list
));
1778 lbs_deb_leave_args(LBS_DEB_SCAN
, "ret %d", ret
);