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>
12 #include <net/ieee80211.h>
13 #include <net/iw_handler.h>
20 //! Approximate amount of data needed to pass a scan result back to iwlist
21 #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
28 + 40) /* 40 for WPAIE */
30 //! Memory needed to store a max sized channel List TLV for a firmware scan
31 #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
32 + (MRVDRV_MAX_CHANNELS_PER_SCAN \
33 * sizeof(struct chanscanparamset)))
35 //! Memory needed to store a max number/size SSID TLV for a firmware scan
36 #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
38 //! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
39 #define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \
40 + sizeof(struct mrvlietypes_numprobes) \
44 //! The maximum number of channels the firmware can scan per command
45 #define MRVDRV_MAX_CHANNELS_PER_SCAN 14
48 * @brief Number of channels to scan per firmware scan command issuance.
50 * Number restricted to prevent hitting the limit on the amount of scan data
51 * returned in a single firmware scan command.
53 #define MRVDRV_CHANNELS_PER_SCAN_CMD 4
55 //! Scan time specified in the channel TLV for each channel for passive scans
56 #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
58 //! Scan time specified in the channel TLV for each channel for active scans
59 #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
61 //! Macro to enable/disable SSID checking before storing a scan table
62 #ifdef DISCARD_BAD_SSID
63 #define CHECK_SSID_IS_VALID(x) ssid_valid(&bssidEntry.ssid)
65 #define CHECK_SSID_IS_VALID(x) 1
69 * @brief Check if a scanned network compatible with the driver settings
71 * WEP WPA WPA2 ad-hoc encrypt Network
72 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
73 * 0 0 0 0 NONE 0 0 0 yes No security
74 * 1 0 0 0 NONE 1 0 0 yes Static WEP
75 * 0 1 0 0 x 1x 1 x yes WPA
76 * 0 0 1 0 x 1x x 1 yes WPA2
77 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
78 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
81 * @param adapter A pointer to wlan_adapter
82 * @param index Index in scantable to check against current driver settings
83 * @param mode Network mode: Infrastructure or IBSS
85 * @return Index in scantable, or error code if negative
87 static int is_network_compatible(wlan_adapter * adapter, int index, u8 mode)
89 lbs_deb_enter(LBS_DEB_ASSOC);
91 if (adapter->scantable[index].mode == mode) {
92 if ( !adapter->secinfo.wep_enabled
93 && !adapter->secinfo.WPAenabled
94 && !adapter->secinfo.WPA2enabled
95 && adapter->scantable[index].wpa_ie[0] != WPA_IE
96 && adapter->scantable[index].rsn_ie[0] != WPA2_IE
97 && !adapter->scantable[index].privacy) {
100 } else if ( adapter->secinfo.wep_enabled
101 && !adapter->secinfo.WPAenabled
102 && !adapter->secinfo.WPA2enabled
103 && adapter->scantable[index].privacy) {
104 /* static WEP enabled */
106 } else if ( !adapter->secinfo.wep_enabled
107 && adapter->secinfo.WPAenabled
108 && !adapter->secinfo.WPA2enabled
109 && (adapter->scantable[index].wpa_ie[0] == WPA_IE)
110 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
111 && adapter->scantable[index].privacy */
115 "is_network_compatible() WPA: index=%d wpa_ie=%#x "
116 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
117 "privacy=%#x\n", index,
118 adapter->scantable[index].wpa_ie[0],
119 adapter->scantable[index].rsn_ie[0],
120 adapter->secinfo.wep_enabled ? "e" : "d",
121 adapter->secinfo.WPAenabled ? "e" : "d",
122 adapter->secinfo.WPA2enabled ? "e" : "d",
123 adapter->scantable[index].privacy);
125 } else if ( !adapter->secinfo.wep_enabled
126 && !adapter->secinfo.WPAenabled
127 && adapter->secinfo.WPA2enabled
128 && (adapter->scantable[index].rsn_ie[0] == WPA2_IE)
129 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
130 && adapter->scantable[index].privacy */
134 "is_network_compatible() WPA2: index=%d wpa_ie=%#x "
135 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
136 "privacy=%#x\n", index,
137 adapter->scantable[index].wpa_ie[0],
138 adapter->scantable[index].rsn_ie[0],
139 adapter->secinfo.wep_enabled ? "e" : "d",
140 adapter->secinfo.WPAenabled ? "e" : "d",
141 adapter->secinfo.WPA2enabled ? "e" : "d",
142 adapter->scantable[index].privacy);
144 } else if ( !adapter->secinfo.wep_enabled
145 && !adapter->secinfo.WPAenabled
146 && !adapter->secinfo.WPA2enabled
147 && (adapter->scantable[index].wpa_ie[0] != WPA_IE)
148 && (adapter->scantable[index].rsn_ie[0] != WPA2_IE)
149 && adapter->scantable[index].privacy) {
150 /* dynamic WEP enabled */
152 "is_network_compatible() dynamic WEP: index=%d "
153 "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
155 adapter->scantable[index].wpa_ie[0],
156 adapter->scantable[index].rsn_ie[0],
157 adapter->scantable[index].privacy);
161 /* security doesn't match */
163 "is_network_compatible() FAILED: index=%d wpa_ie=%#x "
164 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
166 adapter->scantable[index].wpa_ie[0],
167 adapter->scantable[index].rsn_ie[0],
168 adapter->secinfo.wep_enabled ? "e" : "d",
169 adapter->secinfo.WPAenabled ? "e" : "d",
170 adapter->secinfo.WPA2enabled ? "e" : "d",
171 adapter->scantable[index].privacy);
172 index = -ECONNREFUSED;
176 /* mode doesn't match */
177 index = -ENETUNREACH;
180 lbs_deb_leave_args(LBS_DEB_SCAN, "index %d", index);
185 * @brief This function validates a SSID as being able to be printed
187 * @param pssid SSID structure to validate
189 * @return TRUE or FALSE
191 static u8 ssid_valid(struct WLAN_802_11_SSID *pssid)
195 for (ssididx = 0; ssididx < pssid->ssidlength; ssididx++) {
196 if (!isprint(pssid->ssid[ssididx])) {
205 * @brief Post process the scan table after a new scan command has completed
207 * Inspect each entry of the scan table and try to find an entry that
208 * matches our current associated/joined network from the scan. If
209 * one is found, update the stored copy of the bssdescriptor for our
212 * Debug dump the current scan table contents if compiled accordingly.
214 * @param priv A pointer to wlan_private structure
218 static void wlan_scan_process_results(wlan_private * priv)
220 wlan_adapter *adapter = priv->adapter;
226 if (adapter->connect_status == libertas_connected) {
227 /* try to find the current BSSID in the new scan list */
228 for (i = 0; i < adapter->numinscantable; i++) {
229 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid,
230 &adapter->curbssparams.ssid) &&
231 !memcmp(adapter->curbssparams.bssid,
232 adapter->scantable[i].macaddress,
239 /* Make a copy of current BSSID descriptor */
240 memcpy(&adapter->curbssparams.bssdescriptor,
241 &adapter->scantable[i],
242 sizeof(adapter->curbssparams.bssdescriptor));
246 for (i = 0; i < adapter->numinscantable; i++) {
247 lbs_deb_scan("Scan:(%02d) %02x:%02x:%02x:%02x:%02x:%02x, "
248 "RSSI[%03d], SSID[%s]\n",
250 adapter->scantable[i].macaddress[0],
251 adapter->scantable[i].macaddress[1],
252 adapter->scantable[i].macaddress[2],
253 adapter->scantable[i].macaddress[3],
254 adapter->scantable[i].macaddress[4],
255 adapter->scantable[i].macaddress[5],
256 (s32) adapter->scantable[i].rssi,
257 adapter->scantable[i].ssid.ssid);
262 * @brief Create a channel list for the driver to scan based on region info
264 * Use the driver region/band information to construct a comprehensive list
265 * of channels to scan. This routine is used for any scan that is not
266 * provided a specific channel list to scan.
268 * @param priv A pointer to wlan_private structure
269 * @param scanchanlist Output parameter: resulting channel list to scan
270 * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
271 * is being sent in the command to firmware. Used to
272 * increase the number of channels sent in a scan
273 * command and to disable the firmware channel scan
278 static void wlan_scan_create_channel_list(wlan_private * priv,
279 struct chanscanparamset * scanchanlist,
283 wlan_adapter *adapter = priv->adapter;
284 struct region_channel *scanregion;
285 struct chan_freq_power *cfp;
293 /* Set the default scan type to the user specified type, will later
294 * be changed to passive on a per channel basis if restricted by
295 * regulatory requirements (11d or 11h)
297 scantype = adapter->scantype;
299 for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
300 if (priv->adapter->enable11d &&
301 adapter->connect_status != libertas_connected) {
302 /* Scan all the supported chan for the first scan */
303 if (!adapter->universal_channel[rgnidx].valid)
305 scanregion = &adapter->universal_channel[rgnidx];
307 /* clear the parsed_region_chan for the first scan */
308 memset(&adapter->parsed_region_chan, 0x00,
309 sizeof(adapter->parsed_region_chan));
311 if (!adapter->region_channel[rgnidx].valid)
313 scanregion = &adapter->region_channel[rgnidx];
317 nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
319 cfp = scanregion->CFP + nextchan;
321 if (priv->adapter->enable11d) {
323 libertas_get_scan_type_11d(cfp->channel,
328 switch (scanregion->band) {
332 scanchanlist[chanidx].radiotype =
333 cmd_scan_radio_type_bg;
337 if (scantype == cmd_scan_type_passive) {
338 scanchanlist[chanidx].maxscantime =
340 (MRVDRV_PASSIVE_SCAN_CHAN_TIME);
341 scanchanlist[chanidx].chanscanmode.passivescan =
344 scanchanlist[chanidx].maxscantime =
346 (MRVDRV_ACTIVE_SCAN_CHAN_TIME);
347 scanchanlist[chanidx].chanscanmode.passivescan =
351 scanchanlist[chanidx].channumber = cfp->channel;
354 scanchanlist[chanidx].chanscanmode.
362 * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
364 * Application layer or other functions can invoke wlan_scan_networks
365 * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
366 * This structure is used as the basis of one or many wlan_scan_cmd_config
367 * commands that are sent to the command processing module and sent to
370 * Create a wlan_scan_cmd_config based on the following user supplied
371 * parameters (if present):
374 * - Number of Probes to be sent
377 * If the SSID or BSSID filter is not present, disable/clear the filter.
378 * If the number of probes is not set, use the adapter default setting
379 * Qualify the channel
381 * @param priv A pointer to wlan_private structure
382 * @param puserscanin NULL or pointer to scan configuration parameters
383 * @param ppchantlvout Output parameter: Pointer to the start of the
384 * channel TLV portion of the output scan config
385 * @param pscanchanlist Output parameter: Pointer to the resulting channel
387 * @param pmaxchanperscan Output parameter: Number of channels to scan for
388 * each issuance of the firmware scan command
389 * @param pfilteredscan Output parameter: Flag indicating whether or not
390 * a BSSID or SSID filter is being sent in the
391 * command to firmware. Used to increase the number
392 * of channels sent in a scan command and to
393 * disable the firmware channel scan filter.
394 * @param pscancurrentonly Output parameter: Flag indicating whether or not
395 * we are only scanning our current active channel
397 * @return resulting scan configuration
399 static struct wlan_scan_cmd_config *
400 wlan_scan_setup_scan_config(wlan_private * priv,
401 const struct wlan_ioctl_user_scan_cfg * puserscanin,
402 struct mrvlietypes_chanlistparamset ** ppchantlvout,
403 struct chanscanparamset * pscanchanlist,
404 int *pmaxchanperscan,
406 u8 * pscancurrentonly)
408 wlan_adapter *adapter = priv->adapter;
409 const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
410 struct mrvlietypes_numprobes *pnumprobestlv;
411 struct mrvlietypes_ssidparamset *pssidtlv;
412 struct wlan_scan_cmd_config * pscancfgout = NULL;
422 pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
423 if (pscancfgout == NULL)
426 /* The tlvbufferlen is calculated for each scan command. The TLVs added
427 * in this routine will be preserved since the routine that sends
428 * the command will append channelTLVs at *ppchantlvout. The difference
429 * between the *ppchantlvout and the tlvbuffer start will be used
430 * to calculate the size of anything we add in this routine.
432 pscancfgout->tlvbufferlen = 0;
434 /* Running tlv pointer. Assigned to ppchantlvout at end of function
435 * so later routines know where channels can be added to the command buf
437 ptlvpos = pscancfgout->tlvbuffer;
440 * Set the initial scan paramters for progressive scanning. If a specific
441 * BSSID or SSID is used, the number of channels in the scan command
442 * will be increased to the absolute maximum
444 *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
446 /* Initialize the scan as un-filtered by firmware, set to TRUE below if
447 * a SSID or BSSID filter is sent in the command
451 /* Initialize the scan as not being only on the current channel. If
452 * the channel list is customized, only contains one channel, and
453 * is the active channel, this is set true and data flow is not halted.
455 *pscancurrentonly = 0;
459 /* Set the bss type scan filter, use adapter setting if unset */
460 pscancfgout->bsstype =
461 (puserscanin->bsstype ? puserscanin->bsstype : adapter->
464 /* Set the number of probes to send, use adapter setting if unset */
465 numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
466 adapter->scanprobes);
469 * Set the BSSID filter to the incoming configuration,
470 * if non-zero. If not set, it will remain disabled (all zeros).
472 memcpy(pscancfgout->specificBSSID,
473 puserscanin->specificBSSID,
474 sizeof(pscancfgout->specificBSSID));
476 ssidlen = strlen(puserscanin->specificSSID);
480 (struct mrvlietypes_ssidparamset *) pscancfgout->
482 pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
483 pssidtlv->header.len = cpu_to_le16(ssidlen);
484 memcpy(pssidtlv->ssid, puserscanin->specificSSID,
486 ptlvpos += sizeof(pssidtlv->header) + ssidlen;
490 * The default number of channels sent in the command is low to
491 * ensure the response buffer from the firmware does not truncate
492 * scan results. That is not an issue with an SSID or BSSID
493 * filter applied to the scan results in the firmware.
495 if (ssidlen || (memcmp(pscancfgout->specificBSSID,
496 &zeromac, sizeof(zeromac)) != 0)) {
497 *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
501 pscancfgout->bsstype = adapter->scanmode;
502 numprobes = adapter->scanprobes;
505 /* If the input config or adapter has the number of Probes set, add tlv */
507 pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
508 pnumprobestlv->header.type =
509 cpu_to_le16(TLV_TYPE_NUMPROBES);
510 pnumprobestlv->header.len = sizeof(pnumprobestlv->numprobes);
511 pnumprobestlv->numprobes = cpu_to_le16(numprobes);
514 sizeof(pnumprobestlv->header) + pnumprobestlv->header.len;
516 pnumprobestlv->header.len =
517 cpu_to_le16(pnumprobestlv->header.len);
521 * Set the output for the channel TLV to the address in the tlv buffer
522 * past any TLVs that were added in this fuction (SSID, numprobes).
523 * channel TLVs will be added past this for each scan command, preserving
524 * the TLVs that were previously added.
526 *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
528 if (puserscanin && puserscanin->chanlist[0].channumber) {
530 lbs_deb_scan("Scan: Using supplied channel list\n");
533 chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
534 && puserscanin->chanlist[chanidx].channumber; chanidx++) {
536 channel = puserscanin->chanlist[chanidx].channumber;
537 (pscanchanlist + chanidx)->channumber = channel;
539 radiotype = puserscanin->chanlist[chanidx].radiotype;
540 (pscanchanlist + chanidx)->radiotype = radiotype;
542 scantype = puserscanin->chanlist[chanidx].scantype;
544 if (scantype == cmd_scan_type_passive) {
546 chanidx)->chanscanmode.passivescan = 1;
549 chanidx)->chanscanmode.passivescan = 0;
552 if (puserscanin->chanlist[chanidx].scantime) {
554 puserscanin->chanlist[chanidx].scantime;
556 if (scantype == cmd_scan_type_passive) {
557 scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
559 scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
563 (pscanchanlist + chanidx)->minscantime =
564 cpu_to_le16(scandur);
565 (pscanchanlist + chanidx)->maxscantime =
566 cpu_to_le16(scandur);
569 /* Check if we are only scanning the current channel */
570 if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
572 priv->adapter->curbssparams.channel)) {
573 *pscancurrentonly = 1;
574 lbs_deb_scan("Scan: Scanning current channel only");
578 lbs_deb_scan("Scan: Creating full region channel list\n");
579 wlan_scan_create_channel_list(priv, pscanchanlist,
588 * @brief Construct and send multiple scan config commands to the firmware
590 * Previous routines have created a wlan_scan_cmd_config with any requested
591 * TLVs. This function splits the channel TLV into maxchanperscan lists
592 * and sends the portion of the channel TLV along with the other TLVs
593 * to the wlan_cmd routines for execution in the firmware.
595 * @param priv A pointer to wlan_private structure
596 * @param maxchanperscan Maximum number channels to be included in each
597 * scan command sent to firmware
598 * @param filteredscan Flag indicating whether or not a BSSID or SSID
599 * filter is being used for the firmware command
600 * scan command sent to firmware
601 * @param pscancfgout Scan configuration used for this scan.
602 * @param pchantlvout Pointer in the pscancfgout where the channel TLV
603 * should start. This is past any other TLVs that
604 * must be sent down in each firmware command.
605 * @param pscanchanlist List of channels to scan in maxchanperscan segments
607 * @return 0 or error return otherwise
609 static int wlan_scan_channel_list(wlan_private * priv,
612 struct wlan_scan_cmd_config * pscancfgout,
613 struct mrvlietypes_chanlistparamset * pchantlvout,
614 struct chanscanparamset * pscanchanlist,
615 const struct wlan_ioctl_user_scan_cfg * puserscanin,
618 struct chanscanparamset *ptmpchan;
619 struct chanscanparamset *pstartchan;
625 union iwreq_data wrqu;
627 lbs_deb_enter(LBS_DEB_ASSOC);
629 if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
630 lbs_deb_scan("Scan: Null detect: %p, %p, %p\n",
631 pscancfgout, pchantlvout, pscanchanlist);
635 pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
637 /* Set the temp channel struct pointer to the start of the desired list */
638 ptmpchan = pscanchanlist;
640 if (priv->adapter->last_scanned_channel && !puserscanin)
641 ptmpchan += priv->adapter->last_scanned_channel;
643 /* Loop through the desired channel list, sending a new firmware scan
644 * commands for each maxchanperscan channels (or for 1,6,11 individually
645 * if configured accordingly)
647 while (ptmpchan->channumber) {
650 pchantlvout->header.len = 0;
651 scanband = ptmpchan->radiotype;
652 pstartchan = ptmpchan;
655 /* Construct the channel TLV for the scan command. Continue to
656 * insert channel TLVs until:
657 * - the tlvidx hits the maximum configured per scan command
658 * - the next channel to insert is 0 (end of desired channel list)
659 * - doneearly is set (controlling individual scanning of 1,6,11)
661 while (tlvidx < maxchanperscan && ptmpchan->channumber
662 && !doneearly && scanned < 2) {
665 "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
666 ptmpchan->channumber, ptmpchan->radiotype,
667 ptmpchan->chanscanmode.passivescan,
668 ptmpchan->chanscanmode.disablechanfilt,
669 ptmpchan->maxscantime);
671 /* Copy the current channel TLV to the command being prepared */
672 memcpy(pchantlvout->chanscanparam + tlvidx,
673 ptmpchan, sizeof(pchantlvout->chanscanparam));
675 /* Increment the TLV header length by the size appended */
676 pchantlvout->header.len +=
677 sizeof(pchantlvout->chanscanparam);
680 * The tlv buffer length is set to the number of bytes of the
681 * between the channel tlv pointer and the start of the
682 * tlv buffer. This compensates for any TLVs that were appended
683 * before the channel list.
685 pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
686 - pscancfgout->tlvbuffer);
688 /* Add the size of the channel tlv header and the data length */
689 pscancfgout->tlvbufferlen +=
690 (sizeof(pchantlvout->header)
691 + pchantlvout->header.len);
693 /* Increment the index to the channel tlv we are constructing */
698 /* Stop the loop if the *current* channel is in the 1,6,11 set
699 * and we are not filtering on a BSSID or SSID.
701 if (!filteredscan && (ptmpchan->channumber == 1
702 || ptmpchan->channumber == 6
703 || ptmpchan->channumber == 11)) {
707 /* Increment the tmp pointer to the next channel to be scanned */
711 /* Stop the loop if the *next* channel is in the 1,6,11 set.
712 * This will cause it to be the only channel scanned on the next
715 if (!filteredscan && (ptmpchan->channumber == 1
716 || ptmpchan->channumber == 6
717 || ptmpchan->channumber == 11)) {
722 /* Send the scan command to the firmware with the specified cfg */
723 ret = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
725 if (scanned >= 2 && !full_scan) {
726 priv->adapter->last_scanned_channel = ptmpchan->channumber;
733 priv->adapter->last_scanned_channel = ptmpchan->channumber;
735 memset(&wrqu, 0, sizeof(union iwreq_data));
736 wireless_send_event(priv->wlan_dev.netdev, SIOCGIWSCAN, &wrqu, NULL);
739 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
744 * @brief Internal function used to start a scan based on an input config
746 * Use the input user scan configuration information when provided in
747 * order to send the appropriate scan commands to firmware to populate or
748 * update the internal driver scan table
750 * @param priv A pointer to wlan_private structure
751 * @param puserscanin Pointer to the input configuration for the requested
754 * @return 0 or < 0 if error
756 int wlan_scan_networks(wlan_private * priv,
757 const struct wlan_ioctl_user_scan_cfg * puserscanin,
760 wlan_adapter *adapter = priv->adapter;
761 struct mrvlietypes_chanlistparamset *pchantlvout;
762 struct chanscanparamset * scan_chan_list = NULL;
763 struct wlan_scan_cmd_config * scan_cfg = NULL;
766 u8 scancurrentchanonly;
770 lbs_deb_enter(LBS_DEB_ASSOC);
772 scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
773 WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
774 if (scan_chan_list == NULL) {
779 scan_cfg = wlan_scan_setup_scan_config(priv,
785 &scancurrentchanonly);
786 if (scan_cfg == NULL) {
791 keeppreviousscan = 0;
794 keeppreviousscan = puserscanin->keeppreviousscan;
797 if (adapter->last_scanned_channel)
798 keeppreviousscan = 1;
800 if (!keeppreviousscan) {
801 memset(adapter->scantable, 0x00,
802 sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST);
803 adapter->numinscantable = 0;
806 /* Keep the data path active if we are only scanning our current channel */
807 if (!scancurrentchanonly) {
808 netif_stop_queue(priv->wlan_dev.netdev);
809 netif_carrier_off(priv->wlan_dev.netdev);
812 ret = wlan_scan_channel_list(priv,
821 /* Process the resulting scan table:
822 * - Remove any bad ssids
823 * - Update our current BSS information from scan data
825 wlan_scan_process_results(priv);
827 if (priv->adapter->connect_status == libertas_connected) {
828 netif_carrier_on(priv->wlan_dev.netdev);
829 netif_wake_queue(priv->wlan_dev.netdev);
837 kfree(scan_chan_list);
839 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
844 * @brief Inspect the scan response buffer for pointers to expected TLVs
846 * TLVs can be included at the end of the scan response BSS information.
847 * Parse the data in the buffer for pointers to TLVs that can potentially
848 * be passed back in the response
850 * @param ptlv Pointer to the start of the TLV buffer to parse
851 * @param tlvbufsize size of the TLV buffer
852 * @param ptsftlv Output parameter: Pointer to the TSF TLV if found
857 void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
859 struct mrvlietypes_tsftimestamp ** ptsftlv)
861 struct mrvlietypes_data *pcurrenttlv;
867 tlvbufleft = tlvbufsize;
870 lbs_deb_scan("SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
871 lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
873 while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
874 tlvtype = le16_to_cpu(pcurrenttlv->header.type);
875 tlvlen = le16_to_cpu(pcurrenttlv->header.len);
878 case TLV_TYPE_TSFTIMESTAMP:
879 *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
883 lbs_deb_scan("SCAN_RESP: Unhandled TLV = %d\n",
885 /* Give up, this seems corrupted */
889 tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
891 (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
896 * @brief Interpret a BSS scan response returned from the firmware
898 * Parse the various fixed fields and IEs passed back for a a BSS probe
899 * response or beacon from the scan command. Record information as needed
900 * in the scan table struct bss_descriptor for that entry.
902 * @param pBSSIDEntry Output parameter: Pointer to the BSS Entry
906 static int InterpretBSSDescriptionWithIE(struct bss_descriptor * pBSSEntry,
907 u8 ** pbeaconinfo, int *bytesleft)
909 enum ieeetypes_elementid elemID;
910 struct ieeetypes_fhparamset *pFH;
911 struct ieeetypes_dsparamset *pDS;
912 struct ieeetypes_cfparamset *pCF;
913 struct ieeetypes_ibssparamset *pibss;
914 struct ieeetypes_capinfo *pcap;
915 struct WLAN_802_11_FIXED_IEs fixedie;
923 int bytesleftforcurrentbeacon;
927 const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
929 struct ieeetypes_countryinfoset *pcountryinfo;
931 lbs_deb_enter(LBS_DEB_ASSOC);
937 if (*bytesleft >= sizeof(beaconsize)) {
938 /* Extract & convert beacon size from the command buffer */
939 memcpy(&beaconsize, *pbeaconinfo, sizeof(beaconsize));
940 beaconsize = le16_to_cpu(beaconsize);
941 *bytesleft -= sizeof(beaconsize);
942 *pbeaconinfo += sizeof(beaconsize);
945 if (beaconsize == 0 || beaconsize > *bytesleft) {
947 *pbeaconinfo += *bytesleft;
953 /* Initialize the current working beacon pointer for this BSS iteration */
954 pcurrentptr = *pbeaconinfo;
956 /* Advance the return beacon pointer past the current beacon */
957 *pbeaconinfo += beaconsize;
958 *bytesleft -= beaconsize;
960 bytesleftforcurrentbeacon = beaconsize;
962 memcpy(pBSSEntry->macaddress, pcurrentptr, ETH_ALEN);
963 lbs_deb_scan("InterpretIE: AP MAC Addr-%x:%x:%x:%x:%x:%x\n",
964 pBSSEntry->macaddress[0], pBSSEntry->macaddress[1],
965 pBSSEntry->macaddress[2], pBSSEntry->macaddress[3],
966 pBSSEntry->macaddress[4], pBSSEntry->macaddress[5]);
968 pcurrentptr += ETH_ALEN;
969 bytesleftforcurrentbeacon -= ETH_ALEN;
971 if (bytesleftforcurrentbeacon < 12) {
972 lbs_deb_scan("InterpretIE: Not enough bytes left\n");
977 * next 4 fields are RSSI, time stamp, beacon interval,
978 * and capability information
981 /* RSSI is 1 byte long */
982 pBSSEntry->rssi = le32_to_cpu((long)(*pcurrentptr));
983 lbs_deb_scan("InterpretIE: RSSI=%02X\n", *pcurrentptr);
985 bytesleftforcurrentbeacon -= 1;
987 /* time stamp is 8 bytes long */
988 memcpy(fixedie.timestamp, pcurrentptr, 8);
989 memcpy(pBSSEntry->timestamp, pcurrentptr, 8);
991 bytesleftforcurrentbeacon -= 8;
993 /* beacon interval is 2 bytes long */
994 memcpy(&fixedie.beaconinterval, pcurrentptr, 2);
995 pBSSEntry->beaconperiod = le16_to_cpu(fixedie.beaconinterval);
997 bytesleftforcurrentbeacon -= 2;
999 /* capability information is 2 bytes long */
1000 memcpy(&fixedie.capabilities, pcurrentptr, 2);
1001 lbs_deb_scan("InterpretIE: fixedie.capabilities=0x%X\n",
1002 fixedie.capabilities);
1003 fixedie.capabilities = le16_to_cpu(fixedie.capabilities);
1004 pcap = (struct ieeetypes_capinfo *) & fixedie.capabilities;
1005 memcpy(&pBSSEntry->cap, pcap, sizeof(struct ieeetypes_capinfo));
1007 bytesleftforcurrentbeacon -= 2;
1009 /* rest of the current buffer are IE's */
1010 lbs_deb_scan("InterpretIE: IElength for this AP = %d\n",
1011 bytesleftforcurrentbeacon);
1013 lbs_dbg_hex("InterpretIE: IE info", (u8 *) pcurrentptr,
1014 bytesleftforcurrentbeacon);
1016 if (pcap->privacy) {
1017 lbs_deb_scan("InterpretIE: AP WEP enabled\n");
1018 pBSSEntry->privacy = wlan802_11privfilter8021xWEP;
1020 pBSSEntry->privacy = wlan802_11privfilteracceptall;
1023 if (pcap->ibss == 1) {
1024 pBSSEntry->mode = IW_MODE_ADHOC;
1026 pBSSEntry->mode = IW_MODE_INFRA;
1029 /* process variable IE */
1030 while (bytesleftforcurrentbeacon >= 2) {
1031 elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
1032 elemlen = *((u8 *) pcurrentptr + 1);
1034 if (bytesleftforcurrentbeacon < elemlen) {
1035 lbs_deb_scan("InterpretIE: error in processing IE, "
1036 "bytes left < IE length\n");
1037 bytesleftforcurrentbeacon = 0;
1044 pBSSEntry->ssid.ssidlength = elemlen;
1045 memcpy(pBSSEntry->ssid.ssid, (pcurrentptr + 2),
1047 lbs_deb_scan("ssid '%s'\n", pBSSEntry->ssid.ssid);
1050 case SUPPORTED_RATES:
1051 memcpy(pBSSEntry->datarates, (pcurrentptr + 2),
1053 memmove(pBSSEntry->libertas_supported_rates, (pcurrentptr + 2),
1056 founddatarateie = 1;
1060 lbs_deb_scan("InterpretIE: EXTRA_IE Found!\n");
1061 pBSSEntry->extra_ie = 1;
1065 pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
1066 memmove(&pBSSEntry->phyparamset.fhparamset, pFH,
1067 sizeof(struct ieeetypes_fhparamset));
1068 pBSSEntry->phyparamset.fhparamset.dwelltime
1070 le16_to_cpu(pBSSEntry->phyparamset.fhparamset.
1075 pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
1077 pBSSEntry->channel = pDS->currentchan;
1079 memcpy(&pBSSEntry->phyparamset.dsparamset, pDS,
1080 sizeof(struct ieeetypes_dsparamset));
1084 pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
1086 memcpy(&pBSSEntry->ssparamset.cfparamset, pCF,
1087 sizeof(struct ieeetypes_cfparamset));
1090 case IBSS_PARAM_SET:
1091 pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
1092 pBSSEntry->atimwindow =
1093 le32_to_cpu(pibss->atimwindow);
1095 memmove(&pBSSEntry->ssparamset.ibssparamset, pibss,
1096 sizeof(struct ieeetypes_ibssparamset));
1098 pBSSEntry->ssparamset.ibssparamset.atimwindow
1100 le16_to_cpu(pBSSEntry->ssparamset.ibssparamset.
1104 /* Handle Country Info IE */
1107 (struct ieeetypes_countryinfoset *) pcurrentptr;
1109 if (pcountryinfo->len <
1110 sizeof(pcountryinfo->countrycode)
1111 || pcountryinfo->len > 254) {
1112 lbs_deb_scan("InterpretIE: 11D- Err "
1113 "CountryInfo len =%d min=%zd max=254\n",
1115 sizeof(pcountryinfo->countrycode));
1120 memcpy(&pBSSEntry->countryinfo,
1121 pcountryinfo, pcountryinfo->len + 2);
1122 lbs_dbg_hex("InterpretIE: 11D- CountryInfo:",
1123 (u8 *) pcountryinfo,
1124 (u32) (pcountryinfo->len + 2));
1127 case EXTENDED_SUPPORTED_RATES:
1129 * only process extended supported rate
1130 * if data rate is already found.
1131 * data rate IE should come before
1132 * extended supported rate IE
1134 if (founddatarateie) {
1135 if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
1137 (WLAN_SUPPORTED_RATES - ratesize);
1139 bytestocopy = elemlen;
1142 pRate = (u8 *) pBSSEntry->datarates;
1144 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1146 pRate = (u8 *) pBSSEntry->libertas_supported_rates;
1149 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1153 case VENDOR_SPECIFIC_221:
1154 #define IE_ID_LEN_FIELDS_BYTES 2
1155 pIe = (struct IE_WPA *)pcurrentptr;
1157 if (memcmp(pIe->oui, oui01, sizeof(oui01)))
1160 pBSSEntry->wpa_ie_len = min_t(size_t,
1161 elemlen + IE_ID_LEN_FIELDS_BYTES,
1162 sizeof(pBSSEntry->wpa_ie));
1163 memcpy(pBSSEntry->wpa_ie, pcurrentptr,
1164 pBSSEntry->wpa_ie_len);
1165 lbs_dbg_hex("InterpretIE: Resp WPA_IE",
1166 pBSSEntry->wpa_ie, elemlen);
1169 pIe = (struct IE_WPA *)pcurrentptr;
1171 pBSSEntry->rsn_ie_len = min_t(size_t,
1172 elemlen + IE_ID_LEN_FIELDS_BYTES,
1173 sizeof(pBSSEntry->rsn_ie));
1174 memcpy(pBSSEntry->rsn_ie, pcurrentptr,
1175 pBSSEntry->rsn_ie_len);
1176 lbs_dbg_hex("InterpretIE: Resp WPA2_IE",
1177 pBSSEntry->rsn_ie, elemlen);
1182 case CHALLENGE_TEXT:
1186 pcurrentptr += elemlen + 2;
1188 /* need to account for IE ID and IE len */
1189 bytesleftforcurrentbeacon -= (elemlen + 2);
1191 } /* while (bytesleftforcurrentbeacon > 2) */
1195 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1200 * @brief Compare two SSIDs
1202 * @param ssid1 A pointer to ssid to compare
1203 * @param ssid2 A pointer to ssid to compare
1205 * @return 0--ssid is same, otherwise is different
1207 int libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1, struct WLAN_802_11_SSID *ssid2)
1209 if (!ssid1 || !ssid2)
1212 if (ssid1->ssidlength != ssid2->ssidlength)
1215 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssidlength);
1219 * @brief This function finds a specific compatible BSSID in the scan list
1221 * @param adapter A pointer to wlan_adapter
1222 * @param bssid BSSID to find in the scan list
1223 * @param mode Network mode: Infrastructure or IBSS
1225 * @return index in BSSID list, or error return code (< 0)
1227 int libertas_find_BSSID_in_list(wlan_adapter * adapter, u8 * bssid, u8 mode)
1229 int ret = -ENETUNREACH;
1235 lbs_deb_scan("FindBSSID: Num of BSSIDs = %d\n",
1236 adapter->numinscantable);
1238 /* Look through the scan table for a compatible match. The ret return
1239 * variable will be equal to the index in the scan table (greater
1240 * than zero) if the network is compatible. The loop will continue
1241 * past a matched bssid that is not compatible in case there is an
1242 * AP with multiple SSIDs assigned to the same BSSID
1244 for (i = 0; ret < 0 && i < adapter->numinscantable; i++) {
1245 if (!memcmp(adapter->scantable[i].macaddress, bssid, ETH_ALEN)) {
1249 ret = is_network_compatible(adapter, i, mode);
1262 * @brief This function finds ssid in ssid list.
1264 * @param adapter A pointer to wlan_adapter
1265 * @param ssid SSID to find in the list
1266 * @param bssid BSSID to qualify the SSID selection (if provided)
1267 * @param mode Network mode: Infrastructure or IBSS
1269 * @return index in BSSID list
1271 int libertas_find_SSID_in_list(wlan_adapter * adapter,
1272 struct WLAN_802_11_SSID *ssid, u8 * bssid, u8 mode)
1274 int net = -ENETUNREACH;
1279 lbs_deb_scan("Num of Entries in Table = %d\n", adapter->numinscantable);
1281 for (i = 0; i < adapter->numinscantable; i++) {
1282 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid, ssid) &&
1284 !memcmp(adapter->scantable[i].
1285 macaddress, bssid, ETH_ALEN))) {
1289 j = is_network_compatible(adapter, i, mode);
1297 (adapter->scantable[i].rssi)
1306 if (net == -ENETUNREACH) {
1313 if (SCAN_RSSI(adapter->scantable[i].rssi)
1316 SCAN_RSSI(adapter->scantable[i].
1329 * @brief This function finds the best SSID in the Scan List
1331 * Search the scan table for the best SSID that also matches the current
1332 * adapter network preference (infrastructure or adhoc)
1334 * @param adapter A pointer to wlan_adapter
1336 * @return index in BSSID list
1338 int libertas_find_best_SSID_in_list(wlan_adapter * adapter, u8 mode)
1340 int bestnet = -ENETUNREACH;
1344 lbs_deb_enter(LBS_DEB_ASSOC);
1346 lbs_deb_scan("Num of BSSIDs = %d\n", adapter->numinscantable);
1348 for (i = 0; i < adapter->numinscantable; i++) {
1352 if (is_network_compatible(adapter, i, mode) >= 0) {
1353 if (SCAN_RSSI(adapter->scantable[i].rssi) >
1356 SCAN_RSSI(adapter->scantable[i].
1364 if (SCAN_RSSI(adapter->scantable[i].rssi) > bestrssi) {
1366 SCAN_RSSI(adapter->scantable[i].rssi);
1373 lbs_deb_leave_args(LBS_DEB_SCAN, "bestnet %d", bestnet);
1378 * @brief Find the AP with specific ssid in the scan list
1380 * @param priv A pointer to wlan_private structure
1381 * @param pSSID A pointer to AP's ssid
1383 * @return 0--success, otherwise--fail
1385 int libertas_find_best_network_SSID(wlan_private * priv,
1386 struct WLAN_802_11_SSID *pSSID,
1387 u8 preferred_mode, u8 *out_mode)
1389 wlan_adapter *adapter = priv->adapter;
1391 struct bss_descriptor *preqbssid;
1394 lbs_deb_enter(LBS_DEB_ASSOC);
1396 memset(pSSID, 0, sizeof(struct WLAN_802_11_SSID));
1398 wlan_scan_networks(priv, NULL, 1);
1399 if (adapter->surpriseremoved)
1401 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1403 i = libertas_find_best_SSID_in_list(adapter, preferred_mode);
1409 preqbssid = &adapter->scantable[i];
1410 memcpy(pSSID, &preqbssid->ssid,
1411 sizeof(struct WLAN_802_11_SSID));
1412 *out_mode = preqbssid->mode;
1414 if (!pSSID->ssidlength) {
1419 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1424 * @brief Scan Network
1426 * @param dev A pointer to net_device structure
1427 * @param info A pointer to iw_request_info structure
1428 * @param vwrq A pointer to iw_param structure
1429 * @param extra A pointer to extra data buf
1431 * @return 0 --success, otherwise fail
1433 int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
1434 struct iw_param *vwrq, char *extra)
1436 wlan_private *priv = dev->priv;
1437 wlan_adapter *adapter = priv->adapter;
1439 lbs_deb_enter(LBS_DEB_SCAN);
1441 wlan_scan_networks(priv, NULL, 0);
1443 if (adapter->surpriseremoved)
1446 lbs_deb_leave(LBS_DEB_SCAN);
1451 * @brief Send a scan command for all available channels filtered on a spec
1453 * @param priv A pointer to wlan_private structure
1454 * @param prequestedssid A pointer to AP's ssid
1455 * @param keeppreviousscan Flag used to save/clear scan table before scan
1457 * @return 0-success, otherwise fail
1459 int libertas_send_specific_SSID_scan(wlan_private * priv,
1460 struct WLAN_802_11_SSID *prequestedssid,
1461 u8 keeppreviousscan)
1463 wlan_adapter *adapter = priv->adapter;
1464 struct wlan_ioctl_user_scan_cfg scancfg;
1466 lbs_deb_enter(LBS_DEB_ASSOC);
1468 if (prequestedssid == NULL) {
1472 memset(&scancfg, 0x00, sizeof(scancfg));
1474 memcpy(scancfg.specificSSID, prequestedssid->ssid,
1475 prequestedssid->ssidlength);
1476 scancfg.keeppreviousscan = keeppreviousscan;
1478 wlan_scan_networks(priv, &scancfg, 1);
1479 if (adapter->surpriseremoved)
1481 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1483 lbs_deb_leave(LBS_DEB_ASSOC);
1488 * @brief scan an AP with specific BSSID
1490 * @param priv A pointer to wlan_private structure
1491 * @param bssid A pointer to AP's bssid
1492 * @param keeppreviousscan Flag used to save/clear scan table before scan
1494 * @return 0-success, otherwise fail
1496 int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
1498 struct wlan_ioctl_user_scan_cfg scancfg;
1500 lbs_deb_enter(LBS_DEB_ASSOC);
1502 if (bssid == NULL) {
1506 memset(&scancfg, 0x00, sizeof(scancfg));
1507 memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
1508 scancfg.keeppreviousscan = keeppreviousscan;
1510 wlan_scan_networks(priv, &scancfg, 1);
1511 if (priv->adapter->surpriseremoved)
1513 wait_event_interruptible(priv->adapter->cmd_pending,
1514 !priv->adapter->nr_cmd_pending);
1516 lbs_deb_leave(LBS_DEB_ASSOC);
1521 * @brief Retrieve the scan table entries via wireless tools IOCTL call
1523 * @param dev A pointer to net_device structure
1524 * @param info A pointer to iw_request_info structure
1525 * @param dwrq A pointer to iw_point structure
1526 * @param extra A pointer to extra data buf
1528 * @return 0 --success, otherwise fail
1530 int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
1531 struct iw_point *dwrq, char *extra)
1533 wlan_private *priv = dev->priv;
1534 wlan_adapter *adapter = priv->adapter;
1536 char *current_ev = extra;
1537 char *end_buf = extra + IW_SCAN_MAX_DATA;
1538 struct chan_freq_power *cfp;
1539 struct bss_descriptor *pscantable;
1540 char *current_val; /* For rates */
1541 struct iw_event iwe; /* Temporary buffer */
1545 #define PERFECT_RSSI ((u8)50)
1546 #define WORST_RSSI ((u8)0)
1547 #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
1550 u8 buf[16 + 256 * 2];
1553 lbs_deb_enter(LBS_DEB_ASSOC);
1556 * if there's either commands in the queue or one being
1557 * processed return -EAGAIN for iwlist to retry later.
1559 if (adapter->nr_cmd_pending)
1562 if (adapter->last_scanned_channel) {
1563 wlan_scan_networks(priv, NULL, 0);
1567 if (adapter->connect_status == libertas_connected)
1568 lbs_deb_scan("current ssid '%s'\n",
1569 adapter->curbssparams.ssid.ssid);
1571 lbs_deb_scan("Scan: Get: numinscantable = %d\n",
1572 adapter->numinscantable);
1574 /* The old API using SIOCGIWAPLIST had a hard limit of IW_MAX_AP.
1575 * The new API using SIOCGIWSCAN is only limited by buffer size
1576 * WE-14 -> WE-16 the buffer is limited to IW_SCAN_MAX_DATA bytes
1579 for (i = 0; i < adapter->numinscantable; i++) {
1580 if ((current_ev + MAX_SCAN_CELL_SIZE) >= end_buf) {
1581 lbs_deb_scan("i=%d break out: current_ev=%p end_buf=%p "
1582 "MAX_SCAN_CELL_SIZE=%zd\n",
1583 i, current_ev, end_buf, MAX_SCAN_CELL_SIZE);
1587 pscantable = &adapter->scantable[i];
1589 lbs_deb_scan("i %d, ssid '%s'\n", i, pscantable->ssid.ssid);
1592 libertas_find_cfp_by_band_and_channel(adapter, 0,
1593 pscantable->channel);
1595 lbs_deb_scan("Invalid channel number %d\n",
1596 pscantable->channel);
1600 if (!ssid_valid(&adapter->scantable[i].ssid)) {
1604 /* First entry *MUST* be the AP MAC address */
1605 iwe.cmd = SIOCGIWAP;
1606 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1607 memcpy(iwe.u.ap_addr.sa_data,
1608 &adapter->scantable[i].macaddress, ETH_ALEN);
1610 iwe.len = IW_EV_ADDR_LEN;
1612 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1615 iwe.u.data.length = adapter->scantable[i].ssid.ssidlength;
1617 if (iwe.u.data.length > 32) {
1618 iwe.u.data.length = 32;
1621 iwe.cmd = SIOCGIWESSID;
1622 iwe.u.data.flags = 1;
1623 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1624 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1625 adapter->scantable[i].ssid.
1629 iwe.cmd = SIOCGIWMODE;
1630 iwe.u.mode = adapter->scantable[i].mode;
1631 iwe.len = IW_EV_UINT_LEN;
1633 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1636 iwe.cmd = SIOCGIWFREQ;
1637 iwe.u.freq.m = (long)cfp->freq * 100000;
1639 iwe.len = IW_EV_FREQ_LEN;
1641 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1643 /* Add quality statistics */
1645 iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
1646 iwe.u.qual.level = SCAN_RSSI(adapter->scantable[i].rssi);
1648 rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
1650 (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
1651 (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
1652 (RSSI_DIFF * RSSI_DIFF);
1653 if (iwe.u.qual.qual > 100)
1654 iwe.u.qual.qual = 100;
1655 else if (iwe.u.qual.qual < 1)
1656 iwe.u.qual.qual = 0;
1658 if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
1659 iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
1662 CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
1664 if ((adapter->mode == IW_MODE_ADHOC) &&
1665 !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1666 &adapter->scantable[i].ssid)
1667 && adapter->adhoccreate) {
1668 ret = libertas_prepare_and_send_command(priv,
1671 cmd_option_waitforrsp,
1676 CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] /
1678 adapter->NF[TYPE_RXPD][TYPE_AVG] /
1682 iwe.len = IW_EV_QUAL_LEN;
1684 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1686 /* Add encryption capability */
1687 iwe.cmd = SIOCGIWENCODE;
1688 if (adapter->scantable[i].privacy) {
1689 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1691 iwe.u.data.flags = IW_ENCODE_DISABLED;
1693 iwe.u.data.length = 0;
1694 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1695 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1696 adapter->scantable->ssid.
1699 current_val = current_ev + IW_EV_LCP_LEN;
1701 iwe.cmd = SIOCGIWRATE;
1703 iwe.u.bitrate.fixed = 0;
1704 iwe.u.bitrate.disabled = 0;
1705 iwe.u.bitrate.value = 0;
1707 /* Bit rate given in 500 kb/s units (+ 0x80) */
1708 for (j = 0; j < sizeof(adapter->scantable[i].libertas_supported_rates);
1710 if (adapter->scantable[i].libertas_supported_rates[j] == 0) {
1714 (adapter->scantable[i].libertas_supported_rates[j] & 0x7F) *
1716 if (rate > iwe.u.bitrate.value) {
1717 iwe.u.bitrate.value = rate;
1720 iwe.u.bitrate.value =
1721 (adapter->scantable[i].libertas_supported_rates[j]
1723 iwe.len = IW_EV_PARAM_LEN;
1725 iwe_stream_add_value(current_ev, current_val,
1726 end_buf, &iwe, iwe.len);
1729 if ((adapter->scantable[i].mode == IW_MODE_ADHOC)
1730 && !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1731 &adapter->scantable[i].ssid)
1732 && adapter->adhoccreate) {
1733 iwe.u.bitrate.value = 22 * 500000;
1735 iwe.len = IW_EV_PARAM_LEN;
1737 iwe_stream_add_value(current_ev, current_val, end_buf, &iwe,
1740 /* Add new value to event */
1741 current_val = current_ev + IW_EV_LCP_LEN;
1743 if (adapter->scantable[i].rsn_ie[0] == WPA2_IE) {
1744 memset(&iwe, 0, sizeof(iwe));
1745 memset(buf, 0, sizeof(buf));
1746 memcpy(buf, adapter->scantable[i].rsn_ie,
1747 adapter->scantable[i].rsn_ie_len);
1748 iwe.cmd = IWEVGENIE;
1749 iwe.u.data.length = adapter->scantable[i].rsn_ie_len;
1750 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1751 current_ev = iwe_stream_add_point(current_ev, end_buf,
1754 if (adapter->scantable[i].wpa_ie[0] == WPA_IE) {
1755 memset(&iwe, 0, sizeof(iwe));
1756 memset(buf, 0, sizeof(buf));
1757 memcpy(buf, adapter->scantable[i].wpa_ie,
1758 adapter->scantable[i].wpa_ie_len);
1759 iwe.cmd = IWEVGENIE;
1760 iwe.u.data.length = adapter->scantable[i].wpa_ie_len;
1761 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1762 current_ev = iwe_stream_add_point(current_ev, end_buf,
1767 if (adapter->scantable[i].extra_ie != 0) {
1768 memset(&iwe, 0, sizeof(iwe));
1769 memset(buf, 0, sizeof(buf));
1771 ptr += sprintf(ptr, "extra_ie");
1772 iwe.u.data.length = strlen(buf);
1774 lbs_deb_scan("iwe.u.data.length %d\n",
1776 lbs_deb_scan("BUF: %s \n", buf);
1778 iwe.cmd = IWEVCUSTOM;
1779 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1781 iwe_stream_add_point(current_ev, end_buf, &iwe,
1785 current_val = current_ev + IW_EV_LCP_LEN;
1788 * Check if we added any event
1790 if ((current_val - current_ev) > IW_EV_LCP_LEN)
1791 current_ev = current_val;
1794 dwrq->length = (current_ev - extra);
1797 lbs_deb_leave(LBS_DEB_ASSOC);
1802 * @brief Prepare a scan command to be sent to the firmware
1804 * Use the wlan_scan_cmd_config sent to the command processing module in
1805 * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1806 * struct to send to firmware.
1808 * The fixed fields specifying the BSS type and BSSID filters as well as a
1809 * variable number/length of TLVs are sent in the command to firmware.
1811 * @param priv A pointer to wlan_private structure
1812 * @param cmd A pointer to cmd_ds_command structure to be sent to
1813 * firmware with the cmd_DS_801_11_SCAN structure
1814 * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used
1815 * to set the fields/TLVs for the command sent to firmware
1819 * @sa wlan_scan_create_channel_list
1821 int libertas_cmd_80211_scan(wlan_private * priv,
1822 struct cmd_ds_command *cmd, void *pdata_buf)
1824 struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
1825 struct wlan_scan_cmd_config *pscancfg;
1827 lbs_deb_enter(LBS_DEB_ASSOC);
1829 pscancfg = pdata_buf;
1831 /* Set fixed field variables in scan command */
1832 pscan->bsstype = pscancfg->bsstype;
1833 memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
1834 memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
1836 cmd->command = cpu_to_le16(cmd_802_11_scan);
1838 /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1839 cmd->size = cpu_to_le16(sizeof(pscan->bsstype)
1840 + sizeof(pscan->BSSID)
1841 + pscancfg->tlvbufferlen + S_DS_GEN);
1843 lbs_deb_scan("SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
1844 cmd->command, cmd->size, cmd->seqnum);
1846 lbs_deb_leave(LBS_DEB_ASSOC);
1851 * @brief This function handles the command response of scan
1853 * The response buffer for the scan command has the following
1856 * .-----------------------------------------------------------.
1857 * | header (4 * sizeof(u16)): Standard command response hdr |
1858 * .-----------------------------------------------------------.
1859 * | bufsize (u16) : sizeof the BSS Description data |
1860 * .-----------------------------------------------------------.
1861 * | NumOfSet (u8) : Number of BSS Descs returned |
1862 * .-----------------------------------------------------------.
1863 * | BSSDescription data (variable, size given in bufsize) |
1864 * .-----------------------------------------------------------.
1865 * | TLV data (variable, size calculated using header->size, |
1866 * | bufsize and sizeof the fixed fields above) |
1867 * .-----------------------------------------------------------.
1869 * @param priv A pointer to wlan_private structure
1870 * @param resp A pointer to cmd_ds_command
1874 int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
1876 wlan_adapter *adapter = priv->adapter;
1877 struct cmd_ds_802_11_scan_rsp *pscan;
1878 struct bss_descriptor newbssentry;
1879 struct mrvlietypes_data *ptlv;
1880 struct mrvlietypes_tsftimestamp *ptsftlv;
1891 lbs_deb_enter(LBS_DEB_ASSOC);
1893 pscan = &resp->params.scanresp;
1895 if (pscan->nr_sets > MRVDRV_MAX_BSSID_LIST) {
1897 "SCAN_RESP: Invalid number of AP returned (%d)!!\n",
1903 bytesleft = le16_to_cpu(pscan->bssdescriptsize);
1904 lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft);
1906 scanrespsize = le16_to_cpu(resp->size);
1907 lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n",
1910 numintable = adapter->numinscantable;
1911 pbssinfo = pscan->bssdesc_and_tlvbuffer;
1913 /* The size of the TLV buffer is equal to the entire command response
1914 * size (scanrespsize) minus the fixed fields (sizeof()'s), the
1915 * BSS Descriptions (bssdescriptsize as bytesLef) and the command
1916 * response header (S_DS_GEN)
1918 tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
1919 + sizeof(pscan->nr_sets)
1922 ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
1924 /* Search the TLV buffer space in the scan response for any valid TLVs */
1925 wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
1928 * Process each scan response returned (pscan->nr_sets). Save
1929 * the information in the newbssentry and then insert into the
1930 * driver scan table either as an update to an existing entry
1931 * or as an addition at the end of the table
1933 for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
1934 /* Zero out the newbssentry we are about to store info in */
1935 memset(&newbssentry, 0x00, sizeof(newbssentry));
1937 /* Process the data fields and IEs returned for this BSS */
1938 if ((InterpretBSSDescriptionWithIE(&newbssentry,
1942 && CHECK_SSID_IS_VALID(&newbssentry.ssid)) {
1945 "SCAN_RESP: BSSID = %02x:%02x:%02x:%02x:%02x:%02x\n",
1946 newbssentry.macaddress[0],
1947 newbssentry.macaddress[1],
1948 newbssentry.macaddress[2],
1949 newbssentry.macaddress[3],
1950 newbssentry.macaddress[4],
1951 newbssentry.macaddress[5]);
1954 * Search the scan table for the same bssid
1956 for (bssIdx = 0; bssIdx < numintable; bssIdx++) {
1957 if (memcmp(newbssentry.macaddress,
1958 adapter->scantable[bssIdx].
1960 sizeof(newbssentry.macaddress)) ==
1963 * If the SSID matches as well, it is a duplicate of
1964 * this entry. Keep the bssIdx set to this
1965 * entry so we replace the old contents in the table
1967 if ((newbssentry.ssid.ssidlength ==
1968 adapter->scantable[bssIdx].ssid.
1972 (newbssentry.ssid.ssid,
1973 adapter->scantable[bssIdx].ssid.
1975 newbssentry.ssid.ssidlength) ==
1978 "SCAN_RESP: Duplicate of index: %d\n",
1985 * If the bssIdx is equal to the number of entries in the table,
1986 * the new entry was not a duplicate; append it to the scan
1989 if (bssIdx == numintable) {
1990 /* Range check the bssIdx, keep it limited to the last entry */
1991 if (bssIdx == MRVDRV_MAX_BSSID_LIST) {
1999 * If the TSF TLV was appended to the scan results, save the
2000 * this entries TSF value in the networktsf field. The
2001 * networktsf is the firmware's TSF value at the time the
2002 * beacon or probe response was received.
2005 memcpy(&tsfval, &ptsftlv->tsftable[idx],
2007 tsfval = le64_to_cpu(tsfval);
2009 memcpy(&newbssentry.networktsf,
2010 &tsfval, sizeof(newbssentry.networktsf));
2013 /* Copy the locally created newbssentry to the scan table */
2014 memcpy(&adapter->scantable[bssIdx],
2016 sizeof(adapter->scantable[bssIdx]));
2020 /* error parsing/interpreting the scan response, skipped */
2021 lbs_deb_scan("SCAN_RESP: "
2022 "InterpretBSSDescriptionWithIE returned ERROR\n");
2026 lbs_deb_scan("SCAN_RESP: Scanned %2d APs, %d valid, %d total\n",
2027 pscan->nr_sets, numintable - adapter->numinscantable,
2030 /* Update the total number of BSSIDs in the scan table */
2031 adapter->numinscantable = numintable;
2035 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);