1 /* -*- mode: C; tab-width: 4; indent-tabs-mode: nil -*- */
2 /* vi: set expandtab shiftwidth=4 tabstop=4 textwidth=78: */
5 * Functions implementing wlan scan IOCTL and firmware command APIs
7 * IOCTL handlers as well as command preperation and response routines
8 * for sending scan commands to the firmware.
10 #include <linux/ctype.h>
12 #include <linux/netdevice.h>
13 #include <linux/wireless.h>
15 #include <net/ieee80211.h>
16 #include <net/iw_handler.h>
23 //! Approximate amount of data needed to pass a scan result back to iwlist
24 #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
31 + 40) /* 40 for WPAIE */
33 //! Memory needed to store a max sized channel List TLV for a firmware scan
34 #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
35 + (MRVDRV_MAX_CHANNELS_PER_SCAN \
36 * sizeof(struct chanscanparamset)))
38 //! Memory needed to store a max number/size SSID TLV for a firmware scan
39 #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
41 //! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
42 #define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \
43 + sizeof(struct mrvlietypes_numprobes) \
47 //! The maximum number of channels the firmware can scan per command
48 #define MRVDRV_MAX_CHANNELS_PER_SCAN 14
51 * @brief Number of channels to scan per firmware scan command issuance.
53 * Number restricted to prevent hitting the limit on the amount of scan data
54 * returned in a single firmware scan command.
56 #define MRVDRV_CHANNELS_PER_SCAN_CMD 4
58 //! Scan time specified in the channel TLV for each channel for passive scans
59 #define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
61 //! Scan time specified in the channel TLV for each channel for active scans
62 #define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
64 //! Macro to enable/disable SSID checking before storing a scan table
65 #ifdef DISCARD_BAD_SSID
66 #define CHECK_SSID_IS_VALID(x) ssid_valid(&bssidEntry.ssid)
68 #define CHECK_SSID_IS_VALID(x) 1
72 * @brief Check if a scanned network compatible with the driver settings
74 * WEP WPA WPA2 ad-hoc encrypt Network
75 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
76 * 0 0 0 0 NONE 0 0 0 yes No security
77 * 1 0 0 0 NONE 1 0 0 yes Static WEP
78 * 0 1 0 0 x 1x 1 x yes WPA
79 * 0 0 1 0 x 1x x 1 yes WPA2
80 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
81 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
84 * @param adapter A pointer to wlan_adapter
85 * @param index Index in scantable to check against current driver settings
86 * @param mode Network mode: Infrastructure or IBSS
88 * @return Index in scantable, or error code if negative
90 static int is_network_compatible(wlan_adapter * adapter, int index, int mode)
94 if (adapter->scantable[index].inframode == mode) {
95 if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
96 && !adapter->secinfo.WPAenabled
97 && !adapter->secinfo.WPA2enabled
98 && adapter->scantable[index].wpa_ie[0] != WPA_IE
99 && adapter->scantable[index].rsn_ie[0] != WPA2_IE
100 && adapter->secinfo.Encryptionmode == CIPHER_NONE
101 && !adapter->scantable[index].privacy) {
105 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPenabled
106 && !adapter->secinfo.WPAenabled
107 && !adapter->secinfo.WPA2enabled
108 && adapter->scantable[index].privacy) {
109 /* static WEP enabled */
112 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
113 && adapter->secinfo.WPAenabled
114 && !adapter->secinfo.WPA2enabled
115 && (adapter->scantable[index].wpa_ie[0] == WPA_IE)
116 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
117 && adapter->scantable[index].privacy */
121 "is_network_compatible() WPA: index=%d wpa_ie=%#x "
122 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
123 "privacy=%#x\n", index,
124 adapter->scantable[index].wpa_ie[0],
125 adapter->scantable[index].rsn_ie[0],
126 (adapter->secinfo.WEPstatus ==
127 wlan802_11WEPenabled) ? "e" : "d",
128 (adapter->secinfo.WPAenabled) ? "e" : "d",
129 (adapter->secinfo.WPA2enabled) ? "e" : "d",
130 adapter->secinfo.Encryptionmode,
131 adapter->scantable[index].privacy);
134 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
135 && !adapter->secinfo.WPAenabled
136 && adapter->secinfo.WPA2enabled
137 && (adapter->scantable[index].rsn_ie[0] == WPA2_IE)
138 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
139 && adapter->scantable[index].privacy */
143 "is_network_compatible() WPA2: index=%d wpa_ie=%#x "
144 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
145 "privacy=%#x\n", index,
146 adapter->scantable[index].wpa_ie[0],
147 adapter->scantable[index].rsn_ie[0],
148 (adapter->secinfo.WEPstatus ==
149 wlan802_11WEPenabled) ? "e" : "d",
150 (adapter->secinfo.WPAenabled) ? "e" : "d",
151 (adapter->secinfo.WPA2enabled) ? "e" : "d",
152 adapter->secinfo.Encryptionmode,
153 adapter->scantable[index].privacy);
156 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
157 && !adapter->secinfo.WPAenabled
158 && !adapter->secinfo.WPA2enabled
159 && (adapter->scantable[index].wpa_ie[0] != WPA_IE)
160 && (adapter->scantable[index].rsn_ie[0] != WPA2_IE)
161 && adapter->secinfo.Encryptionmode != CIPHER_NONE
162 && adapter->scantable[index].privacy) {
163 /* dynamic WEP enabled */
165 "is_network_compatible() dynamic WEP: index=%d "
166 "wpa_ie=%#x wpa2_ie=%#x Encmode=%#x privacy=%#x\n",
168 adapter->scantable[index].wpa_ie[0],
169 adapter->scantable[index].rsn_ie[0],
170 adapter->secinfo.Encryptionmode,
171 adapter->scantable[index].privacy);
176 /* security doesn't match */
178 "is_network_compatible() FAILED: index=%d wpa_ie=%#x "
179 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x privacy=%#x\n",
181 adapter->scantable[index].wpa_ie[0],
182 adapter->scantable[index].rsn_ie[0],
183 (adapter->secinfo.WEPstatus ==
184 wlan802_11WEPenabled) ? "e" : "d",
185 (adapter->secinfo.WPAenabled) ? "e" : "d",
186 (adapter->secinfo.WPA2enabled) ? "e" : "d",
187 adapter->secinfo.Encryptionmode,
188 adapter->scantable[index].privacy);
190 return -ECONNREFUSED;
193 /* mode doesn't match */
199 * @brief This function validates a SSID as being able to be printed
201 * @param pssid SSID structure to validate
203 * @return TRUE or FALSE
205 static u8 ssid_valid(struct WLAN_802_11_SSID *pssid)
209 for (ssididx = 0; ssididx < pssid->ssidlength; ssididx++) {
210 if (!isprint(pssid->ssid[ssididx])) {
219 * @brief Post process the scan table after a new scan command has completed
221 * Inspect each entry of the scan table and try to find an entry that
222 * matches our current associated/joined network from the scan. If
223 * one is found, update the stored copy of the bssdescriptor for our
226 * Debug dump the current scan table contents if compiled accordingly.
228 * @param priv A pointer to wlan_private structure
232 static void wlan_scan_process_results(wlan_private * priv)
234 wlan_adapter *adapter = priv->adapter;
240 if (adapter->connect_status == libertas_connected) {
241 /* try to find the current BSSID in the new scan list */
242 for (i = 0; i < adapter->numinscantable; i++) {
243 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid,
244 &adapter->curbssparams.ssid) &&
245 !memcmp(adapter->curbssparams.bssid,
246 adapter->scantable[i].macaddress,
253 /* Make a copy of current BSSID descriptor */
254 memcpy(&adapter->curbssparams.bssdescriptor,
255 &adapter->scantable[i],
256 sizeof(adapter->curbssparams.bssdescriptor));
260 for (i = 0; i < adapter->numinscantable; i++) {
261 lbs_pr_debug(1, "Scan:(%02d) %02x:%02x:%02x:%02x:%02x:%02x, "
262 "RSSI[%03d], SSID[%s]\n",
264 adapter->scantable[i].macaddress[0],
265 adapter->scantable[i].macaddress[1],
266 adapter->scantable[i].macaddress[2],
267 adapter->scantable[i].macaddress[3],
268 adapter->scantable[i].macaddress[4],
269 adapter->scantable[i].macaddress[5],
270 (s32) adapter->scantable[i].rssi,
271 adapter->scantable[i].ssid.ssid);
276 * @brief Create a channel list for the driver to scan based on region info
278 * Use the driver region/band information to construct a comprehensive list
279 * of channels to scan. This routine is used for any scan that is not
280 * provided a specific channel list to scan.
282 * @param priv A pointer to wlan_private structure
283 * @param scanchanlist Output parameter: resulting channel list to scan
284 * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
285 * is being sent in the command to firmware. Used to
286 * increase the number of channels sent in a scan
287 * command and to disable the firmware channel scan
292 static void wlan_scan_create_channel_list(wlan_private * priv,
293 struct chanscanparamset * scanchanlist,
297 wlan_adapter *adapter = priv->adapter;
298 struct region_channel *scanregion;
299 struct chan_freq_power *cfp;
307 /* Set the default scan type to the user specified type, will later
308 * be changed to passive on a per channel basis if restricted by
309 * regulatory requirements (11d or 11h)
311 scantype = adapter->scantype;
313 for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
314 if (priv->adapter->enable11d &&
315 adapter->connect_status != libertas_connected) {
316 /* Scan all the supported chan for the first scan */
317 if (!adapter->universal_channel[rgnidx].valid)
319 scanregion = &adapter->universal_channel[rgnidx];
321 /* clear the parsed_region_chan for the first scan */
322 memset(&adapter->parsed_region_chan, 0x00,
323 sizeof(adapter->parsed_region_chan));
325 if (!adapter->region_channel[rgnidx].valid)
327 scanregion = &adapter->region_channel[rgnidx];
331 nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
333 cfp = scanregion->CFP + nextchan;
335 if (priv->adapter->enable11d) {
337 libertas_get_scan_type_11d(cfp->channel,
342 switch (scanregion->band) {
346 scanchanlist[chanidx].radiotype =
347 cmd_scan_radio_type_bg;
351 if (scantype == cmd_scan_type_passive) {
352 scanchanlist[chanidx].maxscantime =
354 (MRVDRV_PASSIVE_SCAN_CHAN_TIME);
355 scanchanlist[chanidx].chanscanmode.passivescan =
358 scanchanlist[chanidx].maxscantime =
360 (MRVDRV_ACTIVE_SCAN_CHAN_TIME);
361 scanchanlist[chanidx].chanscanmode.passivescan =
365 scanchanlist[chanidx].channumber = cfp->channel;
368 scanchanlist[chanidx].chanscanmode.
376 * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
378 * Application layer or other functions can invoke wlan_scan_networks
379 * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
380 * This structure is used as the basis of one or many wlan_scan_cmd_config
381 * commands that are sent to the command processing module and sent to
384 * Create a wlan_scan_cmd_config based on the following user supplied
385 * parameters (if present):
388 * - Number of Probes to be sent
391 * If the SSID or BSSID filter is not present, disable/clear the filter.
392 * If the number of probes is not set, use the adapter default setting
393 * Qualify the channel
395 * @param priv A pointer to wlan_private structure
396 * @param puserscanin NULL or pointer to scan configuration parameters
397 * @param ppchantlvout Output parameter: Pointer to the start of the
398 * channel TLV portion of the output scan config
399 * @param pscanchanlist Output parameter: Pointer to the resulting channel
401 * @param pmaxchanperscan Output parameter: Number of channels to scan for
402 * each issuance of the firmware scan command
403 * @param pfilteredscan Output parameter: Flag indicating whether or not
404 * a BSSID or SSID filter is being sent in the
405 * command to firmware. Used to increase the number
406 * of channels sent in a scan command and to
407 * disable the firmware channel scan filter.
408 * @param pscancurrentonly Output parameter: Flag indicating whether or not
409 * we are only scanning our current active channel
411 * @return resulting scan configuration
413 static struct wlan_scan_cmd_config *
414 wlan_scan_setup_scan_config(wlan_private * priv,
415 const struct wlan_ioctl_user_scan_cfg * puserscanin,
416 struct mrvlietypes_chanlistparamset ** ppchantlvout,
417 struct chanscanparamset * pscanchanlist,
418 int *pmaxchanperscan,
420 u8 * pscancurrentonly)
422 wlan_adapter *adapter = priv->adapter;
423 const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
424 struct mrvlietypes_numprobes *pnumprobestlv;
425 struct mrvlietypes_ssidparamset *pssidtlv;
426 struct wlan_scan_cmd_config * pscancfgout = NULL;
436 pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
437 if (pscancfgout == NULL)
440 /* The tlvbufferlen is calculated for each scan command. The TLVs added
441 * in this routine will be preserved since the routine that sends
442 * the command will append channelTLVs at *ppchantlvout. The difference
443 * between the *ppchantlvout and the tlvbuffer start will be used
444 * to calculate the size of anything we add in this routine.
446 pscancfgout->tlvbufferlen = 0;
448 /* Running tlv pointer. Assigned to ppchantlvout at end of function
449 * so later routines know where channels can be added to the command buf
451 ptlvpos = pscancfgout->tlvbuffer;
454 * Set the initial scan paramters for progressive scanning. If a specific
455 * BSSID or SSID is used, the number of channels in the scan command
456 * will be increased to the absolute maximum
458 *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
460 /* Initialize the scan as un-filtered by firmware, set to TRUE below if
461 * a SSID or BSSID filter is sent in the command
465 /* Initialize the scan as not being only on the current channel. If
466 * the channel list is customized, only contains one channel, and
467 * is the active channel, this is set true and data flow is not halted.
469 *pscancurrentonly = 0;
473 /* Set the bss type scan filter, use adapter setting if unset */
474 pscancfgout->bsstype =
475 (puserscanin->bsstype ? puserscanin->bsstype : adapter->
478 /* Set the number of probes to send, use adapter setting if unset */
479 numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
480 adapter->scanprobes);
483 * Set the BSSID filter to the incoming configuration,
484 * if non-zero. If not set, it will remain disabled (all zeros).
486 memcpy(pscancfgout->specificBSSID,
487 puserscanin->specificBSSID,
488 sizeof(pscancfgout->specificBSSID));
490 ssidlen = strlen(puserscanin->specificSSID);
494 (struct mrvlietypes_ssidparamset *) pscancfgout->
496 pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
497 pssidtlv->header.len = cpu_to_le16(ssidlen);
498 memcpy(pssidtlv->ssid, puserscanin->specificSSID,
500 ptlvpos += sizeof(pssidtlv->header) + ssidlen;
504 * The default number of channels sent in the command is low to
505 * ensure the response buffer from the firmware does not truncate
506 * scan results. That is not an issue with an SSID or BSSID
507 * filter applied to the scan results in the firmware.
509 if (ssidlen || (memcmp(pscancfgout->specificBSSID,
510 &zeromac, sizeof(zeromac)) != 0)) {
511 *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
515 pscancfgout->bsstype = adapter->scanmode;
516 numprobes = adapter->scanprobes;
519 /* If the input config or adapter has the number of Probes set, add tlv */
521 pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
522 pnumprobestlv->header.type =
523 cpu_to_le16(TLV_TYPE_NUMPROBES);
524 pnumprobestlv->header.len = sizeof(pnumprobestlv->numprobes);
525 pnumprobestlv->numprobes = cpu_to_le16(numprobes);
528 sizeof(pnumprobestlv->header) + pnumprobestlv->header.len;
530 pnumprobestlv->header.len =
531 cpu_to_le16(pnumprobestlv->header.len);
535 * Set the output for the channel TLV to the address in the tlv buffer
536 * past any TLVs that were added in this fuction (SSID, numprobes).
537 * channel TLVs will be added past this for each scan command, preserving
538 * the TLVs that were previously added.
540 *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
542 if (puserscanin && puserscanin->chanlist[0].channumber) {
544 lbs_pr_debug(1, "Scan: Using supplied channel list\n");
547 chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
548 && puserscanin->chanlist[chanidx].channumber; chanidx++) {
550 channel = puserscanin->chanlist[chanidx].channumber;
551 (pscanchanlist + chanidx)->channumber = channel;
553 radiotype = puserscanin->chanlist[chanidx].radiotype;
554 (pscanchanlist + chanidx)->radiotype = radiotype;
556 scantype = puserscanin->chanlist[chanidx].scantype;
558 if (scantype == cmd_scan_type_passive) {
560 chanidx)->chanscanmode.passivescan = 1;
563 chanidx)->chanscanmode.passivescan = 0;
566 if (puserscanin->chanlist[chanidx].scantime) {
568 puserscanin->chanlist[chanidx].scantime;
570 if (scantype == cmd_scan_type_passive) {
571 scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
573 scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
577 (pscanchanlist + chanidx)->minscantime =
578 cpu_to_le16(scandur);
579 (pscanchanlist + chanidx)->maxscantime =
580 cpu_to_le16(scandur);
583 /* Check if we are only scanning the current channel */
584 if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
586 priv->adapter->curbssparams.channel)) {
587 *pscancurrentonly = 1;
588 lbs_pr_debug(1, "Scan: Scanning current channel only");
592 lbs_pr_debug(1, "Scan: Creating full region channel list\n");
593 wlan_scan_create_channel_list(priv, pscanchanlist,
602 * @brief Construct and send multiple scan config commands to the firmware
604 * Previous routines have created a wlan_scan_cmd_config with any requested
605 * TLVs. This function splits the channel TLV into maxchanperscan lists
606 * and sends the portion of the channel TLV along with the other TLVs
607 * to the wlan_cmd routines for execution in the firmware.
609 * @param priv A pointer to wlan_private structure
610 * @param maxchanperscan Maximum number channels to be included in each
611 * scan command sent to firmware
612 * @param filteredscan Flag indicating whether or not a BSSID or SSID
613 * filter is being used for the firmware command
614 * scan command sent to firmware
615 * @param pscancfgout Scan configuration used for this scan.
616 * @param pchantlvout Pointer in the pscancfgout where the channel TLV
617 * should start. This is past any other TLVs that
618 * must be sent down in each firmware command.
619 * @param pscanchanlist List of channels to scan in maxchanperscan segments
621 * @return 0 or error return otherwise
623 static int wlan_scan_channel_list(wlan_private * priv,
626 struct wlan_scan_cmd_config * pscancfgout,
627 struct mrvlietypes_chanlistparamset * pchantlvout,
628 struct chanscanparamset * pscanchanlist)
630 struct chanscanparamset *ptmpchan;
631 struct chanscanparamset *pstartchan;
639 if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
640 lbs_pr_debug(1, "Scan: Null detect: %p, %p, %p\n",
641 pscancfgout, pchantlvout, pscanchanlist);
645 pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
647 /* Set the temp channel struct pointer to the start of the desired list */
648 ptmpchan = pscanchanlist;
650 /* Loop through the desired channel list, sending a new firmware scan
651 * commands for each maxchanperscan channels (or for 1,6,11 individually
652 * if configured accordingly)
654 while (ptmpchan->channumber) {
657 pchantlvout->header.len = 0;
658 scanband = ptmpchan->radiotype;
659 pstartchan = ptmpchan;
662 /* Construct the channel TLV for the scan command. Continue to
663 * insert channel TLVs until:
664 * - the tlvidx hits the maximum configured per scan command
665 * - the next channel to insert is 0 (end of desired channel list)
666 * - doneearly is set (controlling individual scanning of 1,6,11)
668 while (tlvidx < maxchanperscan && ptmpchan->channumber
672 "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
673 ptmpchan->channumber, ptmpchan->radiotype,
674 ptmpchan->chanscanmode.passivescan,
675 ptmpchan->chanscanmode.disablechanfilt,
676 ptmpchan->maxscantime);
678 /* Copy the current channel TLV to the command being prepared */
679 memcpy(pchantlvout->chanscanparam + tlvidx,
680 ptmpchan, sizeof(pchantlvout->chanscanparam));
682 /* Increment the TLV header length by the size appended */
683 pchantlvout->header.len +=
684 sizeof(pchantlvout->chanscanparam);
687 * The tlv buffer length is set to the number of bytes of the
688 * between the channel tlv pointer and the start of the
689 * tlv buffer. This compensates for any TLVs that were appended
690 * before the channel list.
692 pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
693 - pscancfgout->tlvbuffer);
695 /* Add the size of the channel tlv header and the data length */
696 pscancfgout->tlvbufferlen +=
697 (sizeof(pchantlvout->header)
698 + pchantlvout->header.len);
700 /* Increment the index to the channel tlv we are constructing */
705 /* Stop the loop if the *current* channel is in the 1,6,11 set
706 * and we are not filtering on a BSSID or SSID.
708 if (!filteredscan && (ptmpchan->channumber == 1
709 || ptmpchan->channumber == 6
710 || ptmpchan->channumber == 11)) {
714 /* Increment the tmp pointer to the next channel to be scanned */
717 /* Stop the loop if the *next* channel is in the 1,6,11 set.
718 * This will cause it to be the only channel scanned on the next
721 if (!filteredscan && (ptmpchan->channumber == 1
722 || ptmpchan->channumber == 6
723 || ptmpchan->channumber == 11)) {
728 /* Send the scan command to the firmware with the specified cfg */
729 ret = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
738 * @brief Internal function used to start a scan based on an input config
740 * Use the input user scan configuration information when provided in
741 * order to send the appropriate scan commands to firmware to populate or
742 * update the internal driver scan table
744 * @param priv A pointer to wlan_private structure
745 * @param puserscanin Pointer to the input configuration for the requested
748 * @return 0 or < 0 if error
750 int wlan_scan_networks(wlan_private * priv,
751 const struct wlan_ioctl_user_scan_cfg * puserscanin)
753 wlan_adapter *adapter = priv->adapter;
754 struct mrvlietypes_chanlistparamset *pchantlvout;
755 struct chanscanparamset * scan_chan_list = NULL;
756 struct wlan_scan_cmd_config * scan_cfg = NULL;
759 u8 scancurrentchanonly;
765 scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
766 WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
767 if (scan_chan_list == NULL) {
772 scan_cfg = wlan_scan_setup_scan_config(priv,
778 &scancurrentchanonly);
779 if (scan_cfg == NULL) {
784 keeppreviousscan = 0;
787 keeppreviousscan = puserscanin->keeppreviousscan;
790 if (!keeppreviousscan) {
791 memset(adapter->scantable, 0x00,
792 sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST);
793 adapter->numinscantable = 0;
796 /* Keep the data path active if we are only scanning our current channel */
797 if (!scancurrentchanonly) {
798 netif_stop_queue(priv->wlan_dev.netdev);
799 netif_carrier_off(priv->wlan_dev.netdev);
802 ret = wlan_scan_channel_list(priv,
809 /* Process the resulting scan table:
810 * - Remove any bad ssids
811 * - Update our current BSS information from scan data
813 wlan_scan_process_results(priv);
815 if (priv->adapter->connect_status == libertas_connected) {
816 netif_carrier_on(priv->wlan_dev.netdev);
817 netif_wake_queue(priv->wlan_dev.netdev);
825 kfree(scan_chan_list);
832 * @brief Inspect the scan response buffer for pointers to expected TLVs
834 * TLVs can be included at the end of the scan response BSS information.
835 * Parse the data in the buffer for pointers to TLVs that can potentially
836 * be passed back in the response
838 * @param ptlv Pointer to the start of the TLV buffer to parse
839 * @param tlvbufsize size of the TLV buffer
840 * @param ptsftlv Output parameter: Pointer to the TSF TLV if found
845 void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
847 struct mrvlietypes_tsftimestamp ** ptsftlv)
849 struct mrvlietypes_data *pcurrenttlv;
855 tlvbufleft = tlvbufsize;
858 lbs_pr_debug(1, "SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
859 lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
861 while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
862 tlvtype = le16_to_cpu(pcurrenttlv->header.type);
863 tlvlen = le16_to_cpu(pcurrenttlv->header.len);
866 case TLV_TYPE_TSFTIMESTAMP:
867 *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
871 lbs_pr_debug(1, "SCAN_RESP: Unhandled TLV = %d\n",
873 /* Give up, this seems corrupted */
877 tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
879 (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
884 * @brief Interpret a BSS scan response returned from the firmware
886 * Parse the various fixed fields and IEs passed back for a a BSS probe
887 * response or beacon from the scan command. Record information as needed
888 * in the scan table struct bss_descriptor for that entry.
890 * @param pBSSIDEntry Output parameter: Pointer to the BSS Entry
894 static int InterpretBSSDescriptionWithIE(struct bss_descriptor * pBSSEntry,
895 u8 ** pbeaconinfo, int *bytesleft)
897 enum ieeetypes_elementid elemID;
898 struct ieeetypes_fhparamset *pFH;
899 struct ieeetypes_dsparamset *pDS;
900 struct ieeetypes_cfparamset *pCF;
901 struct ieeetypes_ibssparamset *pibss;
902 struct ieeetypes_capinfo *pcap;
903 struct WLAN_802_11_FIXED_IEs fixedie;
911 int bytesleftforcurrentbeacon;
914 const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
916 struct ieeetypes_countryinfoset *pcountryinfo;
924 if (*bytesleft >= sizeof(beaconsize)) {
925 /* Extract & convert beacon size from the command buffer */
926 memcpy(&beaconsize, *pbeaconinfo, sizeof(beaconsize));
927 beaconsize = le16_to_cpu(beaconsize);
928 *bytesleft -= sizeof(beaconsize);
929 *pbeaconinfo += sizeof(beaconsize);
932 if (beaconsize == 0 || beaconsize > *bytesleft) {
934 *pbeaconinfo += *bytesleft;
940 /* Initialize the current working beacon pointer for this BSS iteration */
941 pcurrentptr = *pbeaconinfo;
943 /* Advance the return beacon pointer past the current beacon */
944 *pbeaconinfo += beaconsize;
945 *bytesleft -= beaconsize;
947 bytesleftforcurrentbeacon = beaconsize;
949 memcpy(pBSSEntry->macaddress, pcurrentptr, ETH_ALEN);
950 lbs_pr_debug(1, "InterpretIE: AP MAC Addr-%x:%x:%x:%x:%x:%x\n",
951 pBSSEntry->macaddress[0], pBSSEntry->macaddress[1],
952 pBSSEntry->macaddress[2], pBSSEntry->macaddress[3],
953 pBSSEntry->macaddress[4], pBSSEntry->macaddress[5]);
955 pcurrentptr += ETH_ALEN;
956 bytesleftforcurrentbeacon -= ETH_ALEN;
958 if (bytesleftforcurrentbeacon < 12) {
959 lbs_pr_debug(1, "InterpretIE: Not enough bytes left\n");
964 * next 4 fields are RSSI, time stamp, beacon interval,
965 * and capability information
968 /* RSSI is 1 byte long */
969 pBSSEntry->rssi = le32_to_cpu((long)(*pcurrentptr));
970 lbs_pr_debug(1, "InterpretIE: RSSI=%02X\n", *pcurrentptr);
972 bytesleftforcurrentbeacon -= 1;
974 /* time stamp is 8 bytes long */
975 memcpy(fixedie.timestamp, pcurrentptr, 8);
976 memcpy(pBSSEntry->timestamp, pcurrentptr, 8);
978 bytesleftforcurrentbeacon -= 8;
980 /* beacon interval is 2 bytes long */
981 memcpy(&fixedie.beaconinterval, pcurrentptr, 2);
982 pBSSEntry->beaconperiod = le16_to_cpu(fixedie.beaconinterval);
984 bytesleftforcurrentbeacon -= 2;
986 /* capability information is 2 bytes long */
987 memcpy(&fixedie.capabilities, pcurrentptr, 2);
988 lbs_pr_debug(1, "InterpretIE: fixedie.capabilities=0x%X\n",
989 fixedie.capabilities);
990 fixedie.capabilities = le16_to_cpu(fixedie.capabilities);
991 pcap = (struct ieeetypes_capinfo *) & fixedie.capabilities;
992 memcpy(&pBSSEntry->cap, pcap, sizeof(struct ieeetypes_capinfo));
994 bytesleftforcurrentbeacon -= 2;
996 /* rest of the current buffer are IE's */
997 lbs_pr_debug(1, "InterpretIE: IElength for this AP = %d\n",
998 bytesleftforcurrentbeacon);
1000 lbs_dbg_hex("InterpretIE: IE info", (u8 *) pcurrentptr,
1001 bytesleftforcurrentbeacon);
1003 if (pcap->privacy) {
1004 lbs_pr_debug(1, "InterpretIE: AP WEP enabled\n");
1005 pBSSEntry->privacy = wlan802_11privfilter8021xWEP;
1007 pBSSEntry->privacy = wlan802_11privfilteracceptall;
1010 if (pcap->ibss == 1) {
1011 pBSSEntry->inframode = wlan802_11ibss;
1013 pBSSEntry->inframode = wlan802_11infrastructure;
1016 /* process variable IE */
1017 while (bytesleftforcurrentbeacon >= 2) {
1018 elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
1019 elemlen = *((u8 *) pcurrentptr + 1);
1021 if (bytesleftforcurrentbeacon < elemlen) {
1022 lbs_pr_debug(1, "InterpretIE: error in processing IE, "
1023 "bytes left < IE length\n");
1024 bytesleftforcurrentbeacon = 0;
1031 pBSSEntry->ssid.ssidlength = elemlen;
1032 memcpy(pBSSEntry->ssid.ssid, (pcurrentptr + 2),
1034 lbs_pr_debug(1, "ssid: %32s", pBSSEntry->ssid.ssid);
1037 case SUPPORTED_RATES:
1038 memcpy(pBSSEntry->datarates, (pcurrentptr + 2),
1040 memmove(pBSSEntry->libertas_supported_rates, (pcurrentptr + 2),
1043 founddatarateie = 1;
1047 lbs_pr_debug(1, "InterpretIE: EXTRA_IE Found!\n");
1048 pBSSEntry->extra_ie = 1;
1052 pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
1053 memmove(&pBSSEntry->phyparamset.fhparamset, pFH,
1054 sizeof(struct ieeetypes_fhparamset));
1055 pBSSEntry->phyparamset.fhparamset.dwelltime
1057 le16_to_cpu(pBSSEntry->phyparamset.fhparamset.
1062 pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
1064 pBSSEntry->channel = pDS->currentchan;
1066 memcpy(&pBSSEntry->phyparamset.dsparamset, pDS,
1067 sizeof(struct ieeetypes_dsparamset));
1071 pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
1073 memcpy(&pBSSEntry->ssparamset.cfparamset, pCF,
1074 sizeof(struct ieeetypes_cfparamset));
1077 case IBSS_PARAM_SET:
1078 pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
1079 pBSSEntry->atimwindow =
1080 le32_to_cpu(pibss->atimwindow);
1082 memmove(&pBSSEntry->ssparamset.ibssparamset, pibss,
1083 sizeof(struct ieeetypes_ibssparamset));
1085 pBSSEntry->ssparamset.ibssparamset.atimwindow
1087 le16_to_cpu(pBSSEntry->ssparamset.ibssparamset.
1091 /* Handle Country Info IE */
1094 (struct ieeetypes_countryinfoset *) pcurrentptr;
1096 if (pcountryinfo->len <
1097 sizeof(pcountryinfo->countrycode)
1098 || pcountryinfo->len > 254) {
1099 lbs_pr_debug(1, "InterpretIE: 11D- Err "
1100 "CountryInfo len =%d min=%d max=254\n",
1102 sizeof(pcountryinfo->countrycode));
1107 memcpy(&pBSSEntry->countryinfo,
1108 pcountryinfo, pcountryinfo->len + 2);
1109 lbs_dbg_hex("InterpretIE: 11D- CountryInfo:",
1110 (u8 *) pcountryinfo,
1111 (u32) (pcountryinfo->len + 2));
1114 case EXTENDED_SUPPORTED_RATES:
1116 * only process extended supported rate
1117 * if data rate is already found.
1118 * data rate IE should come before
1119 * extended supported rate IE
1121 if (founddatarateie) {
1122 if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
1124 (WLAN_SUPPORTED_RATES - ratesize);
1126 bytestocopy = elemlen;
1129 pRate = (u8 *) pBSSEntry->datarates;
1131 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1133 pRate = (u8 *) pBSSEntry->libertas_supported_rates;
1136 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1140 case VENDOR_SPECIFIC_221:
1141 #define IE_ID_LEN_FIELDS_BYTES 2
1142 pIe = (struct IE_WPA *)pcurrentptr;
1144 if (memcmp(pIe->oui, oui01, sizeof(oui01)))
1147 pBSSEntry->wpa_ie_len = min_t(size_t,
1148 elemlen + IE_ID_LEN_FIELDS_BYTES,
1149 sizeof(pBSSEntry->wpa_ie));
1150 memcpy(pBSSEntry->wpa_ie, pcurrentptr,
1151 pBSSEntry->wpa_ie_len);
1152 lbs_dbg_hex("InterpretIE: Resp WPA_IE",
1153 pBSSEntry->wpa_ie, elemlen);
1156 pIe = (struct IE_WPA *)pcurrentptr;
1158 pBSSEntry->rsn_ie_len = min_t(size_t,
1159 elemlen + IE_ID_LEN_FIELDS_BYTES,
1160 sizeof(pBSSEntry->rsn_ie));
1161 memcpy(pBSSEntry->rsn_ie, pcurrentptr,
1162 pBSSEntry->rsn_ie_len);
1163 lbs_dbg_hex("InterpretIE: Resp WPA2_IE",
1164 pBSSEntry->rsn_ie, elemlen);
1169 case CHALLENGE_TEXT:
1173 pcurrentptr += elemlen + 2;
1175 /* need to account for IE ID and IE len */
1176 bytesleftforcurrentbeacon -= (elemlen + 2);
1178 } /* while (bytesleftforcurrentbeacon > 2) */
1184 * @brief Compare two SSIDs
1186 * @param ssid1 A pointer to ssid to compare
1187 * @param ssid2 A pointer to ssid to compare
1189 * @return 0--ssid is same, otherwise is different
1191 int libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1, struct WLAN_802_11_SSID *ssid2)
1193 if (!ssid1 || !ssid2)
1196 if (ssid1->ssidlength != ssid2->ssidlength)
1199 return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssidlength);
1203 * @brief This function finds a specific compatible BSSID in the scan list
1205 * @param adapter A pointer to wlan_adapter
1206 * @param bssid BSSID to find in the scan list
1207 * @param mode Network mode: Infrastructure or IBSS
1209 * @return index in BSSID list, or error return code (< 0)
1211 int libertas_find_BSSID_in_list(wlan_adapter * adapter, u8 * bssid, int mode)
1213 int ret = -ENETUNREACH;
1219 lbs_pr_debug(1, "FindBSSID: Num of BSSIDs = %d\n",
1220 adapter->numinscantable);
1222 /* Look through the scan table for a compatible match. The ret return
1223 * variable will be equal to the index in the scan table (greater
1224 * than zero) if the network is compatible. The loop will continue
1225 * past a matched bssid that is not compatible in case there is an
1226 * AP with multiple SSIDs assigned to the same BSSID
1228 for (i = 0; ret < 0 && i < adapter->numinscantable; i++) {
1229 if (!memcmp(adapter->scantable[i].macaddress, bssid, ETH_ALEN)) {
1231 case wlan802_11infrastructure:
1232 case wlan802_11ibss:
1233 ret = is_network_compatible(adapter, i, mode);
1246 * @brief This function finds ssid in ssid list.
1248 * @param adapter A pointer to wlan_adapter
1249 * @param ssid SSID to find in the list
1250 * @param bssid BSSID to qualify the SSID selection (if provided)
1251 * @param mode Network mode: Infrastructure or IBSS
1253 * @return index in BSSID list
1255 int libertas_find_SSID_in_list(wlan_adapter * adapter,
1256 struct WLAN_802_11_SSID *ssid, u8 * bssid, int mode)
1258 int net = -ENETUNREACH;
1263 lbs_pr_debug(1, "Num of Entries in Table = %d\n", adapter->numinscantable);
1265 for (i = 0; i < adapter->numinscantable; i++) {
1266 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid, ssid) &&
1268 !memcmp(adapter->scantable[i].
1269 macaddress, bssid, ETH_ALEN))) {
1271 case wlan802_11infrastructure:
1272 case wlan802_11ibss:
1273 j = is_network_compatible(adapter, i, mode);
1281 (adapter->scantable[i].rssi)
1290 if (net == -ENETUNREACH) {
1295 case wlan802_11autounknown:
1297 if (SCAN_RSSI(adapter->scantable[i].rssi)
1300 SCAN_RSSI(adapter->scantable[i].
1313 * @brief This function finds the best SSID in the Scan List
1315 * Search the scan table for the best SSID that also matches the current
1316 * adapter network preference (infrastructure or adhoc)
1318 * @param adapter A pointer to wlan_adapter
1320 * @return index in BSSID list
1322 int libertas_find_best_SSID_in_list(wlan_adapter * adapter,
1323 enum WLAN_802_11_NETWORK_INFRASTRUCTURE mode)
1325 int bestnet = -ENETUNREACH;
1331 lbs_pr_debug(1, "Num of BSSIDs = %d\n", adapter->numinscantable);
1333 for (i = 0; i < adapter->numinscantable; i++) {
1335 case wlan802_11infrastructure:
1336 case wlan802_11ibss:
1337 if (is_network_compatible(adapter, i, mode) >= 0) {
1338 if (SCAN_RSSI(adapter->scantable[i].rssi) >
1341 SCAN_RSSI(adapter->scantable[i].
1347 case wlan802_11autounknown:
1349 if (SCAN_RSSI(adapter->scantable[i].rssi) > bestrssi) {
1351 SCAN_RSSI(adapter->scantable[i].rssi);
1363 * @brief Find the AP with specific ssid in the scan list
1365 * @param priv A pointer to wlan_private structure
1366 * @param pSSID A pointer to AP's ssid
1368 * @return 0--success, otherwise--fail
1370 int libertas_find_best_network_SSID(wlan_private * priv,
1371 struct WLAN_802_11_SSID *pSSID,
1372 enum WLAN_802_11_NETWORK_INFRASTRUCTURE preferred_mode,
1373 enum WLAN_802_11_NETWORK_INFRASTRUCTURE *out_mode)
1375 wlan_adapter *adapter = priv->adapter;
1377 struct bss_descriptor *preqbssid;
1382 memset(pSSID, 0, sizeof(struct WLAN_802_11_SSID));
1384 wlan_scan_networks(priv, NULL);
1385 if (adapter->surpriseremoved)
1387 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1389 i = libertas_find_best_SSID_in_list(adapter, preferred_mode);
1395 preqbssid = &adapter->scantable[i];
1396 memcpy(pSSID, &preqbssid->ssid,
1397 sizeof(struct WLAN_802_11_SSID));
1398 *out_mode = preqbssid->inframode;
1400 if (!pSSID->ssidlength) {
1410 * @brief Scan Network
1412 * @param dev A pointer to net_device structure
1413 * @param info A pointer to iw_request_info structure
1414 * @param vwrq A pointer to iw_param structure
1415 * @param extra A pointer to extra data buf
1417 * @return 0 --success, otherwise fail
1419 int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
1420 struct iw_param *vwrq, char *extra)
1422 wlan_private *priv = dev->priv;
1423 wlan_adapter *adapter = priv->adapter;
1424 union iwreq_data wrqu;
1428 if (!wlan_scan_networks(priv, NULL)) {
1429 memset(&wrqu, 0, sizeof(union iwreq_data));
1430 wireless_send_event(priv->wlan_dev.netdev, SIOCGIWSCAN, &wrqu,
1434 if (adapter->surpriseremoved)
1442 * @brief Send a scan command for all available channels filtered on a spec
1444 * @param priv A pointer to wlan_private structure
1445 * @param prequestedssid A pointer to AP's ssid
1446 * @param keeppreviousscan Flag used to save/clear scan table before scan
1448 * @return 0-success, otherwise fail
1450 int libertas_send_specific_SSID_scan(wlan_private * priv,
1451 struct WLAN_802_11_SSID *prequestedssid,
1452 u8 keeppreviousscan)
1454 wlan_adapter *adapter = priv->adapter;
1455 struct wlan_ioctl_user_scan_cfg scancfg;
1459 if (prequestedssid == NULL) {
1463 memset(&scancfg, 0x00, sizeof(scancfg));
1465 memcpy(scancfg.specificSSID, prequestedssid->ssid,
1466 prequestedssid->ssidlength);
1467 scancfg.keeppreviousscan = keeppreviousscan;
1469 wlan_scan_networks(priv, &scancfg);
1470 if (adapter->surpriseremoved)
1472 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1479 * @brief scan an AP with specific BSSID
1481 * @param priv A pointer to wlan_private structure
1482 * @param bssid A pointer to AP's bssid
1483 * @param keeppreviousscan Flag used to save/clear scan table before scan
1485 * @return 0-success, otherwise fail
1487 int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
1489 struct wlan_ioctl_user_scan_cfg scancfg;
1493 if (bssid == NULL) {
1497 memset(&scancfg, 0x00, sizeof(scancfg));
1498 memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
1499 scancfg.keeppreviousscan = keeppreviousscan;
1501 wlan_scan_networks(priv, &scancfg);
1502 if (priv->adapter->surpriseremoved)
1504 wait_event_interruptible(priv->adapter->cmd_pending,
1505 !priv->adapter->nr_cmd_pending);
1512 * @brief Retrieve the scan table entries via wireless tools IOCTL call
1514 * @param dev A pointer to net_device structure
1515 * @param info A pointer to iw_request_info structure
1516 * @param dwrq A pointer to iw_point structure
1517 * @param extra A pointer to extra data buf
1519 * @return 0 --success, otherwise fail
1521 int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
1522 struct iw_point *dwrq, char *extra)
1524 wlan_private *priv = dev->priv;
1525 wlan_adapter *adapter = priv->adapter;
1527 char *current_ev = extra;
1528 char *end_buf = extra + IW_SCAN_MAX_DATA;
1529 struct chan_freq_power *cfp;
1530 struct bss_descriptor *pscantable;
1531 char *current_val; /* For rates */
1532 struct iw_event iwe; /* Temporary buffer */
1536 #define PERFECT_RSSI ((u8)50)
1537 #define WORST_RSSI ((u8)0)
1538 #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
1541 u8 buf[16 + 256 * 2];
1547 * if there's either commands in the queue or one being
1548 * processed return -EAGAIN for iwlist to retry later.
1550 if (adapter->nr_cmd_pending)
1553 if (adapter->connect_status == libertas_connected)
1554 lbs_pr_debug(1, "Current ssid: %32s\n",
1555 adapter->curbssparams.ssid.ssid);
1557 lbs_pr_debug(1, "Scan: Get: numinscantable = %d\n",
1558 adapter->numinscantable);
1560 /* The old API using SIOCGIWAPLIST had a hard limit of IW_MAX_AP.
1561 * The new API using SIOCGIWSCAN is only limited by buffer size
1562 * WE-14 -> WE-16 the buffer is limited to IW_SCAN_MAX_DATA bytes
1565 for (i = 0; i < adapter->numinscantable; i++) {
1566 if ((current_ev + MAX_SCAN_CELL_SIZE) >= end_buf) {
1567 lbs_pr_debug(1, "i=%d break out: current_ev=%p end_buf=%p "
1568 "MAX_SCAN_CELL_SIZE=%d\n",
1569 i, current_ev, end_buf, MAX_SCAN_CELL_SIZE);
1573 pscantable = &adapter->scantable[i];
1575 lbs_pr_debug(1, "i=%d ssid: %32s\n", i, pscantable->ssid.ssid);
1578 libertas_find_cfp_by_band_and_channel(adapter, 0,
1579 pscantable->channel);
1581 lbs_pr_debug(1, "Invalid channel number %d\n",
1582 pscantable->channel);
1586 if (!ssid_valid(&adapter->scantable[i].ssid)) {
1590 /* First entry *MUST* be the AP MAC address */
1591 iwe.cmd = SIOCGIWAP;
1592 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1593 memcpy(iwe.u.ap_addr.sa_data,
1594 &adapter->scantable[i].macaddress, ETH_ALEN);
1596 iwe.len = IW_EV_ADDR_LEN;
1598 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1601 iwe.u.data.length = adapter->scantable[i].ssid.ssidlength;
1603 if (iwe.u.data.length > 32) {
1604 iwe.u.data.length = 32;
1607 iwe.cmd = SIOCGIWESSID;
1608 iwe.u.data.flags = 1;
1609 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1610 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1611 adapter->scantable[i].ssid.
1615 iwe.cmd = SIOCGIWMODE;
1616 iwe.u.mode = adapter->scantable[i].inframode + 1;
1617 iwe.len = IW_EV_UINT_LEN;
1619 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1622 iwe.cmd = SIOCGIWFREQ;
1623 iwe.u.freq.m = (long)cfp->freq * 100000;
1625 iwe.len = IW_EV_FREQ_LEN;
1627 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1629 /* Add quality statistics */
1631 iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
1632 iwe.u.qual.level = SCAN_RSSI(adapter->scantable[i].rssi);
1634 rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
1636 (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
1637 (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
1638 (RSSI_DIFF * RSSI_DIFF);
1639 if (iwe.u.qual.qual > 100)
1640 iwe.u.qual.qual = 100;
1641 else if (iwe.u.qual.qual < 1)
1642 iwe.u.qual.qual = 0;
1644 if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
1645 iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
1648 CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
1650 if ((adapter->inframode == wlan802_11ibss) &&
1651 !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1652 &adapter->scantable[i].ssid)
1653 && adapter->adhoccreate) {
1654 ret = libertas_prepare_and_send_command(priv,
1657 cmd_option_waitforrsp,
1662 CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] /
1664 adapter->NF[TYPE_RXPD][TYPE_AVG] /
1668 iwe.len = IW_EV_QUAL_LEN;
1670 iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1672 /* Add encryption capability */
1673 iwe.cmd = SIOCGIWENCODE;
1674 if (adapter->scantable[i].privacy) {
1675 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1677 iwe.u.data.flags = IW_ENCODE_DISABLED;
1679 iwe.u.data.length = 0;
1680 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1681 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1682 adapter->scantable->ssid.
1685 current_val = current_ev + IW_EV_LCP_LEN;
1687 iwe.cmd = SIOCGIWRATE;
1689 iwe.u.bitrate.fixed = 0;
1690 iwe.u.bitrate.disabled = 0;
1691 iwe.u.bitrate.value = 0;
1693 /* Bit rate given in 500 kb/s units (+ 0x80) */
1694 for (j = 0; j < sizeof(adapter->scantable[i].libertas_supported_rates);
1696 if (adapter->scantable[i].libertas_supported_rates[j] == 0) {
1700 (adapter->scantable[i].libertas_supported_rates[j] & 0x7F) *
1702 if (rate > iwe.u.bitrate.value) {
1703 iwe.u.bitrate.value = rate;
1706 iwe.u.bitrate.value =
1707 (adapter->scantable[i].libertas_supported_rates[j]
1709 iwe.len = IW_EV_PARAM_LEN;
1711 iwe_stream_add_value(current_ev, current_val,
1712 end_buf, &iwe, iwe.len);
1715 if ((adapter->scantable[i].inframode == wlan802_11ibss)
1716 && !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1717 &adapter->scantable[i].ssid)
1718 && adapter->adhoccreate) {
1719 iwe.u.bitrate.value = 22 * 500000;
1721 iwe.len = IW_EV_PARAM_LEN;
1723 iwe_stream_add_value(current_ev, current_val, end_buf, &iwe,
1726 /* Add new value to event */
1727 current_val = current_ev + IW_EV_LCP_LEN;
1729 if (adapter->scantable[i].rsn_ie[0] == WPA2_IE) {
1730 memset(&iwe, 0, sizeof(iwe));
1731 memset(buf, 0, sizeof(buf));
1732 memcpy(buf, adapter->scantable[i].rsn_ie,
1733 adapter->scantable[i].rsn_ie_len);
1734 iwe.cmd = IWEVGENIE;
1735 iwe.u.data.length = adapter->scantable[i].rsn_ie_len;
1736 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1737 current_ev = iwe_stream_add_point(current_ev, end_buf,
1740 if (adapter->scantable[i].wpa_ie[0] == WPA_IE) {
1741 memset(&iwe, 0, sizeof(iwe));
1742 memset(buf, 0, sizeof(buf));
1743 memcpy(buf, adapter->scantable[i].wpa_ie,
1744 adapter->scantable[i].wpa_ie_len);
1745 iwe.cmd = IWEVGENIE;
1746 iwe.u.data.length = adapter->scantable[i].wpa_ie_len;
1747 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1748 current_ev = iwe_stream_add_point(current_ev, end_buf,
1753 if (adapter->scantable[i].extra_ie != 0) {
1754 memset(&iwe, 0, sizeof(iwe));
1755 memset(buf, 0, sizeof(buf));
1757 ptr += sprintf(ptr, "extra_ie");
1758 iwe.u.data.length = strlen(buf);
1760 lbs_pr_debug(1, "iwe.u.data.length %d\n",
1762 lbs_pr_debug(1, "BUF: %s \n", buf);
1764 iwe.cmd = IWEVCUSTOM;
1765 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1767 iwe_stream_add_point(current_ev, end_buf, &iwe,
1771 current_val = current_ev + IW_EV_LCP_LEN;
1774 * Check if we added any event
1776 if ((current_val - current_ev) > IW_EV_LCP_LEN)
1777 current_ev = current_val;
1780 dwrq->length = (current_ev - extra);
1788 * @brief Prepare a scan command to be sent to the firmware
1790 * Use the wlan_scan_cmd_config sent to the command processing module in
1791 * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1792 * struct to send to firmware.
1794 * The fixed fields specifying the BSS type and BSSID filters as well as a
1795 * variable number/length of TLVs are sent in the command to firmware.
1797 * @param priv A pointer to wlan_private structure
1798 * @param cmd A pointer to cmd_ds_command structure to be sent to
1799 * firmware with the cmd_DS_801_11_SCAN structure
1800 * @param pdata_buf Void pointer cast of a wlan_scan_cmd_config struct used
1801 * to set the fields/TLVs for the command sent to firmware
1805 * @sa wlan_scan_create_channel_list
1807 int libertas_cmd_80211_scan(wlan_private * priv,
1808 struct cmd_ds_command *cmd, void *pdata_buf)
1810 struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
1811 struct wlan_scan_cmd_config *pscancfg;
1815 pscancfg = pdata_buf;
1817 /* Set fixed field variables in scan command */
1818 pscan->bsstype = pscancfg->bsstype;
1819 memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
1820 memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
1822 cmd->command = cpu_to_le16(cmd_802_11_scan);
1824 /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1825 cmd->size = cpu_to_le16(sizeof(pscan->bsstype)
1826 + sizeof(pscan->BSSID)
1827 + pscancfg->tlvbufferlen + S_DS_GEN);
1829 lbs_pr_debug(1, "SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
1830 cmd->command, cmd->size, cmd->seqnum);
1836 * @brief This function handles the command response of scan
1838 * The response buffer for the scan command has the following
1841 * .-----------------------------------------------------------.
1842 * | header (4 * sizeof(u16)): Standard command response hdr |
1843 * .-----------------------------------------------------------.
1844 * | bufsize (u16) : sizeof the BSS Description data |
1845 * .-----------------------------------------------------------.
1846 * | NumOfSet (u8) : Number of BSS Descs returned |
1847 * .-----------------------------------------------------------.
1848 * | BSSDescription data (variable, size given in bufsize) |
1849 * .-----------------------------------------------------------.
1850 * | TLV data (variable, size calculated using header->size, |
1851 * | bufsize and sizeof the fixed fields above) |
1852 * .-----------------------------------------------------------.
1854 * @param priv A pointer to wlan_private structure
1855 * @param resp A pointer to cmd_ds_command
1859 int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
1861 wlan_adapter *adapter = priv->adapter;
1862 struct cmd_ds_802_11_scan_rsp *pscan;
1863 struct bss_descriptor newbssentry;
1864 struct mrvlietypes_data *ptlv;
1865 struct mrvlietypes_tsftimestamp *ptsftlv;
1877 pscan = &resp->params.scanresp;
1879 if (pscan->nr_sets > MRVDRV_MAX_BSSID_LIST) {
1881 "SCAN_RESP: Invalid number of AP returned (%d)!!\n",
1887 bytesleft = le16_to_cpu(pscan->bssdescriptsize);
1888 lbs_pr_debug(1, "SCAN_RESP: bssdescriptsize %d\n", bytesleft);
1890 scanrespsize = le16_to_cpu(resp->size);
1891 lbs_pr_debug(1, "SCAN_RESP: returned %d AP before parsing\n",
1894 numintable = adapter->numinscantable;
1895 pbssinfo = pscan->bssdesc_and_tlvbuffer;
1897 /* The size of the TLV buffer is equal to the entire command response
1898 * size (scanrespsize) minus the fixed fields (sizeof()'s), the
1899 * BSS Descriptions (bssdescriptsize as bytesLef) and the command
1900 * response header (S_DS_GEN)
1902 tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
1903 + sizeof(pscan->nr_sets)
1906 ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
1908 /* Search the TLV buffer space in the scan response for any valid TLVs */
1909 wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
1912 * Process each scan response returned (pscan->nr_sets). Save
1913 * the information in the newbssentry and then insert into the
1914 * driver scan table either as an update to an existing entry
1915 * or as an addition at the end of the table
1917 for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
1918 /* Zero out the newbssentry we are about to store info in */
1919 memset(&newbssentry, 0x00, sizeof(newbssentry));
1921 /* Process the data fields and IEs returned for this BSS */
1922 if ((InterpretBSSDescriptionWithIE(&newbssentry,
1926 && CHECK_SSID_IS_VALID(&newbssentry.ssid)) {
1929 "SCAN_RESP: BSSID = %02x:%02x:%02x:%02x:%02x:%02x\n",
1930 newbssentry.macaddress[0],
1931 newbssentry.macaddress[1],
1932 newbssentry.macaddress[2],
1933 newbssentry.macaddress[3],
1934 newbssentry.macaddress[4],
1935 newbssentry.macaddress[5]);
1938 * Search the scan table for the same bssid
1940 for (bssIdx = 0; bssIdx < numintable; bssIdx++) {
1941 if (memcmp(newbssentry.macaddress,
1942 adapter->scantable[bssIdx].
1944 sizeof(newbssentry.macaddress)) ==
1947 * If the SSID matches as well, it is a duplicate of
1948 * this entry. Keep the bssIdx set to this
1949 * entry so we replace the old contents in the table
1951 if ((newbssentry.ssid.ssidlength ==
1952 adapter->scantable[bssIdx].ssid.
1956 (newbssentry.ssid.ssid,
1957 adapter->scantable[bssIdx].ssid.
1959 newbssentry.ssid.ssidlength) ==
1962 "SCAN_RESP: Duplicate of index: %d\n",
1969 * If the bssIdx is equal to the number of entries in the table,
1970 * the new entry was not a duplicate; append it to the scan
1973 if (bssIdx == numintable) {
1974 /* Range check the bssIdx, keep it limited to the last entry */
1975 if (bssIdx == MRVDRV_MAX_BSSID_LIST) {
1983 * If the TSF TLV was appended to the scan results, save the
1984 * this entries TSF value in the networktsf field. The
1985 * networktsf is the firmware's TSF value at the time the
1986 * beacon or probe response was received.
1989 memcpy(&tsfval, &ptsftlv->tsftable[idx],
1991 tsfval = le64_to_cpu(tsfval);
1993 memcpy(&newbssentry.networktsf,
1994 &tsfval, sizeof(newbssentry.networktsf));
1997 /* Copy the locally created newbssentry to the scan table */
1998 memcpy(&adapter->scantable[bssIdx],
2000 sizeof(adapter->scantable[bssIdx]));
2004 /* error parsing/interpreting the scan response, skipped */
2005 lbs_pr_debug(1, "SCAN_RESP: "
2006 "InterpretBSSDescriptionWithIE returned ERROR\n");
2010 lbs_pr_debug(1, "SCAN_RESP: Scanned %2d APs, %d valid, %d total\n",
2011 pscan->nr_sets, numintable - adapter->numinscantable,
2014 /* Update the total number of BSSIDs in the scan table */
2015 adapter->numinscantable = numintable;