2 * Functions implementing wlan scan IOCTL and firmware command APIs
4 * IOCTL handlers as well as command preperation and response routines
5 * for sending scan commands to the firmware.
7 #include <linux/ctype.h>
9 #include <linux/netdevice.h>
10 #include <linux/wireless.h>
11 #include <linux/etherdevice.h>
13 #include <net/ieee80211.h>
14 #include <net/iw_handler.h>
16 #include <asm/unaligned.h>
24 //! Approximate amount of data needed to pass a scan result back to iwlist
25 #define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
32 + 40) /* 40 for WPAIE */
34 //! Memory needed to store a max sized channel List TLV for a firmware scan
35 #define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
36 + (MRVDRV_MAX_CHANNELS_PER_SCAN \
37 * sizeof(struct chanscanparamset)))
39 //! Memory needed to store a max number/size SSID TLV for a firmware scan
40 #define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
42 //! Maximum memory needed for a lbs_scan_cmd_config with all TLVs at max
43 #define MAX_SCAN_CFG_ALLOC (sizeof(struct lbs_scan_cmd_config) \
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 static const u8 zeromac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
65 static const u8 bcastmac[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
70 /*********************************************************************/
72 /* Misc helper functions */
74 /*********************************************************************/
76 static inline void clear_bss_descriptor (struct bss_descriptor * bss)
78 /* Don't blow away ->list, just BSS data */
79 memset(bss, 0, offsetof(struct bss_descriptor, list));
82 static inline int match_bss_no_security(struct lbs_802_11_security *secinfo,
83 struct bss_descriptor * match_bss)
85 if ( !secinfo->wep_enabled
86 && !secinfo->WPAenabled
87 && !secinfo->WPA2enabled
88 && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC
89 && match_bss->rsn_ie[0] != MFIE_TYPE_RSN
90 && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
96 static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo,
97 struct bss_descriptor * match_bss)
99 if ( secinfo->wep_enabled
100 && !secinfo->WPAenabled
101 && !secinfo->WPA2enabled
102 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
108 static inline int match_bss_wpa(struct lbs_802_11_security *secinfo,
109 struct bss_descriptor * match_bss)
111 if ( !secinfo->wep_enabled
112 && secinfo->WPAenabled
113 && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC)
114 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
115 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
123 static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo,
124 struct bss_descriptor * match_bss)
126 if ( !secinfo->wep_enabled
127 && secinfo->WPA2enabled
128 && (match_bss->rsn_ie[0] == MFIE_TYPE_RSN)
129 /* privacy bit may NOT be set in some APs like LinkSys WRT54G
130 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
138 static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo,
139 struct bss_descriptor * match_bss)
141 if ( !secinfo->wep_enabled
142 && !secinfo->WPAenabled
143 && !secinfo->WPA2enabled
144 && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC)
145 && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN)
146 && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
153 * @brief Check if a scanned network compatible with the driver settings
155 * WEP WPA WPA2 ad-hoc encrypt Network
156 * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
157 * 0 0 0 0 NONE 0 0 0 yes No security
158 * 1 0 0 0 NONE 1 0 0 yes Static WEP
159 * 0 1 0 0 x 1x 1 x yes WPA
160 * 0 0 1 0 x 1x x 1 yes WPA2
161 * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
162 * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
165 * @param adapter A pointer to struct lbs_adapter
166 * @param index Index in scantable to check against current driver settings
167 * @param mode Network mode: Infrastructure or IBSS
169 * @return Index in scantable, or error code if negative
171 static int is_network_compatible(struct lbs_adapter *adapter,
172 struct bss_descriptor * bss, u8 mode)
176 lbs_deb_enter(LBS_DEB_SCAN);
178 if (bss->mode != mode)
181 if ((matched = match_bss_no_security(&adapter->secinfo, bss))) {
183 } else if ((matched = match_bss_static_wep(&adapter->secinfo, bss))) {
185 } else if ((matched = match_bss_wpa(&adapter->secinfo, bss))) {
187 "is_network_compatible() WPA: wpa_ie=%#x "
188 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
189 "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0],
190 adapter->secinfo.wep_enabled ? "e" : "d",
191 adapter->secinfo.WPAenabled ? "e" : "d",
192 adapter->secinfo.WPA2enabled ? "e" : "d",
193 (bss->capability & WLAN_CAPABILITY_PRIVACY));
195 } else if ((matched = match_bss_wpa2(&adapter->secinfo, bss))) {
197 "is_network_compatible() WPA2: wpa_ie=%#x "
198 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
199 "privacy=%#x\n", bss->wpa_ie[0], bss->rsn_ie[0],
200 adapter->secinfo.wep_enabled ? "e" : "d",
201 adapter->secinfo.WPAenabled ? "e" : "d",
202 adapter->secinfo.WPA2enabled ? "e" : "d",
203 (bss->capability & WLAN_CAPABILITY_PRIVACY));
205 } else if ((matched = match_bss_dynamic_wep(&adapter->secinfo, bss))) {
207 "is_network_compatible() dynamic WEP: "
208 "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
209 bss->wpa_ie[0], bss->rsn_ie[0],
210 (bss->capability & WLAN_CAPABILITY_PRIVACY));
214 /* bss security settings don't match those configured on card */
216 "is_network_compatible() FAILED: wpa_ie=%#x "
217 "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
218 bss->wpa_ie[0], bss->rsn_ie[0],
219 adapter->secinfo.wep_enabled ? "e" : "d",
220 adapter->secinfo.WPAenabled ? "e" : "d",
221 adapter->secinfo.WPA2enabled ? "e" : "d",
222 (bss->capability & WLAN_CAPABILITY_PRIVACY));
225 lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched);
230 * @brief Compare two SSIDs
232 * @param ssid1 A pointer to ssid to compare
233 * @param ssid2 A pointer to ssid to compare
235 * @return 0--ssid is same, otherwise is different
237 int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len)
239 if (ssid1_len != ssid2_len)
242 return memcmp(ssid1, ssid2, ssid1_len);
248 /*********************************************************************/
250 /* Main scanning support */
252 /*********************************************************************/
256 * @brief Create a channel list for the driver to scan based on region info
258 * Only used from lbs_scan_setup_scan_config()
260 * Use the driver region/band information to construct a comprehensive list
261 * of channels to scan. This routine is used for any scan that is not
262 * provided a specific channel list to scan.
264 * @param priv A pointer to struct lbs_private structure
265 * @param scanchanlist Output parameter: resulting channel list to scan
266 * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
267 * is being sent in the command to firmware. Used to
268 * increase the number of channels sent in a scan
269 * command and to disable the firmware channel scan
274 static void lbs_scan_create_channel_list(struct lbs_private *priv,
275 struct chanscanparamset * scanchanlist,
279 struct lbs_adapter *adapter = priv->adapter;
280 struct region_channel *scanregion;
281 struct chan_freq_power *cfp;
287 lbs_deb_enter_args(LBS_DEB_SCAN, "filteredscan %d", filteredscan);
291 /* Set the default scan type to the user specified type, will later
292 * be changed to passive on a per channel basis if restricted by
293 * regulatory requirements (11d or 11h)
295 scantype = CMD_SCAN_TYPE_ACTIVE;
297 for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
298 if (priv->adapter->enable11d &&
299 (adapter->connect_status != LBS_CONNECTED) &&
300 (adapter->mesh_connect_status != LBS_CONNECTED)) {
301 /* Scan all the supported chan for the first scan */
302 if (!adapter->universal_channel[rgnidx].valid)
304 scanregion = &adapter->universal_channel[rgnidx];
306 /* clear the parsed_region_chan for the first scan */
307 memset(&adapter->parsed_region_chan, 0x00,
308 sizeof(adapter->parsed_region_chan));
310 if (!adapter->region_channel[rgnidx].valid)
312 scanregion = &adapter->region_channel[rgnidx];
316 nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
318 cfp = scanregion->CFP + nextchan;
320 if (priv->adapter->enable11d) {
322 lbs_get_scan_type_11d(cfp->channel,
327 switch (scanregion->band) {
331 scanchanlist[chanidx].radiotype =
332 CMD_SCAN_RADIO_TYPE_BG;
336 if (scantype == CMD_SCAN_TYPE_PASSIVE) {
337 scanchanlist[chanidx].maxscantime =
338 cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME);
339 scanchanlist[chanidx].chanscanmode.passivescan =
342 scanchanlist[chanidx].maxscantime =
343 cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME);
344 scanchanlist[chanidx].chanscanmode.passivescan =
348 scanchanlist[chanidx].channumber = cfp->channel;
351 scanchanlist[chanidx].chanscanmode.
359 /* Delayed partial scan worker */
360 void lbs_scan_worker(struct work_struct *work)
362 struct lbs_private *priv = container_of(work,
366 lbs_scan_networks(priv, NULL, 0);
371 * @brief Construct a lbs_scan_cmd_config structure to use in issue scan cmds
373 * Application layer or other functions can invoke lbs_scan_networks
374 * with a scan configuration supplied in a lbs_ioctl_user_scan_cfg struct.
375 * This structure is used as the basis of one or many lbs_scan_cmd_config
376 * commands that are sent to the command processing module and sent to
379 * Create a lbs_scan_cmd_config based on the following user supplied
380 * parameters (if present):
383 * - Number of Probes to be sent
386 * If the SSID or BSSID filter is not present, disable/clear the filter.
387 * Qualify the channel
389 * @param priv A pointer to struct lbs_private structure
390 * @param puserscanin NULL or pointer to scan configuration parameters
391 * @param ppchantlvout Output parameter: Pointer to the start of the
392 * channel TLV portion of the output scan config
393 * @param pscanchanlist Output parameter: Pointer to the resulting channel
395 * @param pmaxchanperscan Output parameter: Number of channels to scan for
396 * each issuance of the firmware scan command
397 * @param pfilteredscan Output parameter: Flag indicating whether or not
398 * a BSSID or SSID filter is being sent in the
399 * command to firmware. Used to increase the number
400 * of channels sent in a scan command and to
401 * disable the firmware channel scan filter.
402 * @param pscancurrentonly Output parameter: Flag indicating whether or not
403 * we are only scanning our current active channel
405 * @return resulting scan configuration
407 static struct lbs_scan_cmd_config *
408 lbs_scan_setup_scan_config(struct lbs_private *priv,
409 const struct lbs_ioctl_user_scan_cfg *puserscanin,
410 struct mrvlietypes_chanlistparamset ** ppchantlvout,
411 struct chanscanparamset * pscanchanlist,
412 int *pmaxchanperscan,
414 u8 * pscancurrentonly)
416 struct mrvlietypes_ssidparamset *pssidtlv;
417 struct lbs_scan_cmd_config *pscancfgout = NULL;
425 lbs_deb_enter(LBS_DEB_SCAN);
427 pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
428 if (pscancfgout == NULL)
431 /* The tlvbufferlen is calculated for each scan command. The TLVs added
432 * in this routine will be preserved since the routine that sends
433 * the command will append channelTLVs at *ppchantlvout. The difference
434 * between the *ppchantlvout and the tlvbuffer start will be used
435 * to calculate the size of anything we add in this routine.
437 pscancfgout->tlvbufferlen = 0;
439 /* Running tlv pointer. Assigned to ppchantlvout at end of function
440 * so later routines know where channels can be added to the command buf
442 ptlvpos = pscancfgout->tlvbuffer;
445 * Set the initial scan paramters for progressive scanning. If a specific
446 * BSSID or SSID is used, the number of channels in the scan command
447 * will be increased to the absolute maximum
449 *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
451 /* Initialize the scan as un-filtered by firmware, set to TRUE below if
452 * a SSID or BSSID filter is sent in the command
456 /* Initialize the scan as not being only on the current channel. If
457 * the channel list is customized, only contains one channel, and
458 * is the active channel, this is set true and data flow is not halted.
460 *pscancurrentonly = 0;
463 /* Set the bss type scan filter, use adapter setting if unset */
464 pscancfgout->bsstype =
465 puserscanin->bsstype ? puserscanin->bsstype : CMD_BSS_TYPE_ANY;
468 * Set the BSSID filter to the incoming configuration,
469 * if non-zero. If not set, it will remain disabled (all zeros).
471 memcpy(pscancfgout->bssid, puserscanin->bssid,
472 sizeof(pscancfgout->bssid));
474 if (puserscanin->ssid_len) {
476 (struct mrvlietypes_ssidparamset *) pscancfgout->
478 pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
479 pssidtlv->header.len = cpu_to_le16(puserscanin->ssid_len);
480 memcpy(pssidtlv->ssid, puserscanin->ssid,
481 puserscanin->ssid_len);
482 ptlvpos += sizeof(pssidtlv->header) + puserscanin->ssid_len;
486 * The default number of channels sent in the command is low to
487 * ensure the response buffer from the firmware does not truncate
488 * scan results. That is not an issue with an SSID or BSSID
489 * filter applied to the scan results in the firmware.
491 if ( puserscanin->ssid_len
492 || (compare_ether_addr(pscancfgout->bssid, &zeromac[0]) != 0)) {
493 *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
497 pscancfgout->bsstype = CMD_BSS_TYPE_ANY;
501 * Set the output for the channel TLV to the address in the tlv buffer
502 * past any TLVs that were added in this fuction (SSID).
503 * channel TLVs will be added past this for each scan command, preserving
504 * the TLVs that were previously added.
506 *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
508 if (!puserscanin || !puserscanin->chanlist[0].channumber) {
509 /* Create a default channel scan list */
510 lbs_deb_scan("creating full region channel list\n");
511 lbs_scan_create_channel_list(priv, pscanchanlist,
517 chanidx < LBS_IOCTL_USER_SCAN_CHAN_MAX
518 && puserscanin->chanlist[chanidx].channumber; chanidx++) {
520 channel = puserscanin->chanlist[chanidx].channumber;
521 (pscanchanlist + chanidx)->channumber = channel;
523 radiotype = puserscanin->chanlist[chanidx].radiotype;
524 (pscanchanlist + chanidx)->radiotype = radiotype;
526 scantype = puserscanin->chanlist[chanidx].scantype;
528 if (scantype == CMD_SCAN_TYPE_PASSIVE) {
530 chanidx)->chanscanmode.passivescan = 1;
533 chanidx)->chanscanmode.passivescan = 0;
536 if (puserscanin->chanlist[chanidx].scantime) {
537 scandur = puserscanin->chanlist[chanidx].scantime;
539 if (scantype == CMD_SCAN_TYPE_PASSIVE) {
540 scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
542 scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
546 (pscanchanlist + chanidx)->minscantime =
547 cpu_to_le16(scandur);
548 (pscanchanlist + chanidx)->maxscantime =
549 cpu_to_le16(scandur);
552 /* Check if we are only scanning the current channel */
553 if ((chanidx == 1) &&
554 (puserscanin->chanlist[0].channumber ==
555 priv->adapter->curbssparams.channel)) {
556 *pscancurrentonly = 1;
557 lbs_deb_scan("scanning current channel only");
565 * @brief Construct and send multiple scan config commands to the firmware
567 * Only used from lbs_scan_networks()
569 * Previous routines have created a lbs_scan_cmd_config with any requested
570 * TLVs. This function splits the channel TLV into maxchanperscan lists
571 * and sends the portion of the channel TLV along with the other TLVs
572 * to the lbs_cmd routines for execution in the firmware.
574 * @param priv A pointer to struct lbs_private structure
575 * @param maxchanperscan Maximum number channels to be included in each
576 * scan command sent to firmware
577 * @param filteredscan Flag indicating whether or not a BSSID or SSID
578 * filter is being used for the firmware command
579 * scan command sent to firmware
580 * @param pscancfgout Scan configuration used for this scan.
581 * @param pchantlvout Pointer in the pscancfgout where the channel TLV
582 * should start. This is past any other TLVs that
583 * must be sent down in each firmware command.
584 * @param pscanchanlist List of channels to scan in maxchanperscan segments
586 * @return 0 or error return otherwise
588 static int lbs_scan_channel_list(struct lbs_private *priv,
591 struct lbs_scan_cmd_config *pscancfgout,
592 struct mrvlietypes_chanlistparamset * pchantlvout,
593 struct chanscanparamset * pscanchanlist,
594 const struct lbs_ioctl_user_scan_cfg *puserscanin,
597 struct chanscanparamset *ptmpchan;
598 struct chanscanparamset *pstartchan;
604 union iwreq_data wrqu;
606 lbs_deb_enter_args(LBS_DEB_SCAN, "maxchanperscan %d, filteredscan %d, "
607 "full_scan %d", maxchanperscan, filteredscan, full_scan);
609 if (!pscancfgout || !pchantlvout || !pscanchanlist) {
610 lbs_deb_scan("pscancfgout, pchantlvout or "
611 "pscanchanlist is NULL\n");
616 pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
618 /* Set the temp channel struct pointer to the start of the desired list */
619 ptmpchan = pscanchanlist;
621 if (priv->adapter->last_scanned_channel && !puserscanin)
622 ptmpchan += priv->adapter->last_scanned_channel;
624 /* Loop through the desired channel list, sending a new firmware scan
625 * commands for each maxchanperscan channels (or for 1,6,11 individually
626 * if configured accordingly)
628 while (ptmpchan->channumber) {
631 pchantlvout->header.len = 0;
632 scanband = ptmpchan->radiotype;
633 pstartchan = ptmpchan;
636 /* Construct the channel TLV for the scan command. Continue to
637 * insert channel TLVs until:
638 * - the tlvidx hits the maximum configured per scan command
639 * - the next channel to insert is 0 (end of desired channel list)
640 * - doneearly is set (controlling individual scanning of 1,6,11)
642 while (tlvidx < maxchanperscan && ptmpchan->channumber
643 && !doneearly && scanned < 2) {
645 lbs_deb_scan("channel %d, radio %d, passive %d, "
646 "dischanflt %d, maxscantime %d\n",
647 ptmpchan->channumber,
649 ptmpchan->chanscanmode.passivescan,
650 ptmpchan->chanscanmode.disablechanfilt,
651 ptmpchan->maxscantime);
653 /* Copy the current channel TLV to the command being prepared */
654 memcpy(pchantlvout->chanscanparam + tlvidx,
655 ptmpchan, sizeof(pchantlvout->chanscanparam));
657 /* Increment the TLV header length by the size appended */
658 /* Ew, it would be _so_ nice if we could just declare the
659 variable little-endian and let GCC handle it for us */
660 pchantlvout->header.len =
661 cpu_to_le16(le16_to_cpu(pchantlvout->header.len) +
662 sizeof(pchantlvout->chanscanparam));
665 * The tlv buffer length is set to the number of bytes of the
666 * between the channel tlv pointer and the start of the
667 * tlv buffer. This compensates for any TLVs that were appended
668 * before the channel list.
670 pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
671 - pscancfgout->tlvbuffer);
673 /* Add the size of the channel tlv header and the data length */
674 pscancfgout->tlvbufferlen +=
675 (sizeof(pchantlvout->header)
676 + le16_to_cpu(pchantlvout->header.len));
678 /* Increment the index to the channel tlv we are constructing */
683 /* Stop the loop if the *current* channel is in the 1,6,11 set
684 * and we are not filtering on a BSSID or SSID.
686 if (!filteredscan && (ptmpchan->channumber == 1
687 || ptmpchan->channumber == 6
688 || ptmpchan->channumber == 11)) {
692 /* Increment the tmp pointer to the next channel to be scanned */
696 /* Stop the loop if the *next* channel is in the 1,6,11 set.
697 * This will cause it to be the only channel scanned on the next
700 if (!filteredscan && (ptmpchan->channumber == 1
701 || ptmpchan->channumber == 6
702 || ptmpchan->channumber == 11)) {
707 /* Send the scan command to the firmware with the specified cfg */
708 ret = lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, 0,
710 if (scanned >= 2 && !full_scan) {
718 priv->adapter->last_scanned_channel = ptmpchan->channumber;
720 if (priv->adapter->last_scanned_channel) {
721 /* Schedule the next part of the partial scan */
722 if (!full_scan && !priv->adapter->surpriseremoved) {
723 cancel_delayed_work(&priv->scan_work);
724 queue_delayed_work(priv->work_thread, &priv->scan_work,
725 msecs_to_jiffies(300));
728 /* All done, tell userspace the scan table has been updated */
729 memset(&wrqu, 0, sizeof(union iwreq_data));
730 wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
734 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
739 * Only used from lbs_scan_networks()
741 static void clear_selected_scan_list_entries(struct lbs_adapter *adapter,
742 const struct lbs_ioctl_user_scan_cfg *scan_cfg)
744 struct bss_descriptor *bss;
745 struct bss_descriptor *safe;
746 u32 clear_ssid_flag = 0, clear_bssid_flag = 0;
748 lbs_deb_enter(LBS_DEB_SCAN);
753 if (scan_cfg->clear_ssid && scan_cfg->ssid_len)
756 if (scan_cfg->clear_bssid
757 && (compare_ether_addr(scan_cfg->bssid, &zeromac[0]) != 0)
758 && (compare_ether_addr(scan_cfg->bssid, &bcastmac[0]) != 0)) {
759 clear_bssid_flag = 1;
762 if (!clear_ssid_flag && !clear_bssid_flag)
765 mutex_lock(&adapter->lock);
766 list_for_each_entry_safe (bss, safe, &adapter->network_list, list) {
769 /* Check for an SSID match */
771 && (bss->ssid_len == scan_cfg->ssid_len)
772 && !memcmp(bss->ssid, scan_cfg->ssid, bss->ssid_len))
775 /* Check for a BSSID match */
776 if ( clear_bssid_flag
777 && !compare_ether_addr(bss->bssid, scan_cfg->bssid))
781 list_move_tail (&bss->list, &adapter->network_free_list);
782 clear_bss_descriptor(bss);
785 mutex_unlock(&adapter->lock);
787 lbs_deb_leave(LBS_DEB_SCAN);
792 * @brief Internal function used to start a scan based on an input config
794 * Also used from debugfs
796 * Use the input user scan configuration information when provided in
797 * order to send the appropriate scan commands to firmware to populate or
798 * update the internal driver scan table
800 * @param priv A pointer to struct lbs_private structure
801 * @param puserscanin Pointer to the input configuration for the requested
803 * @param full_scan ???
805 * @return 0 or < 0 if error
807 int lbs_scan_networks(struct lbs_private *priv,
808 const struct lbs_ioctl_user_scan_cfg *puserscanin,
811 struct lbs_adapter *adapter = priv->adapter;
812 struct mrvlietypes_chanlistparamset *pchantlvout;
813 struct chanscanparamset * scan_chan_list = NULL;
814 struct lbs_scan_cmd_config *scan_cfg = NULL;
816 u8 scancurrentchanonly;
819 #ifdef CONFIG_LIBERTAS_DEBUG
820 struct bss_descriptor * iter_bss;
822 DECLARE_MAC_BUF(mac);
825 lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d", full_scan);
827 /* Cancel any partial outstanding partial scans if this scan
830 if (full_scan && delayed_work_pending(&priv->scan_work))
831 cancel_delayed_work(&priv->scan_work);
833 scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
834 LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
835 if (scan_chan_list == NULL) {
840 scan_cfg = lbs_scan_setup_scan_config(priv,
846 &scancurrentchanonly);
847 if (scan_cfg == NULL) {
852 clear_selected_scan_list_entries(adapter, puserscanin);
854 /* Keep the data path active if we are only scanning our current channel */
855 if (!scancurrentchanonly) {
856 netif_stop_queue(priv->dev);
857 netif_carrier_off(priv->dev);
858 if (priv->mesh_dev) {
859 netif_stop_queue(priv->mesh_dev);
860 netif_carrier_off(priv->mesh_dev);
864 ret = lbs_scan_channel_list(priv,
873 #ifdef CONFIG_LIBERTAS_DEBUG
874 /* Dump the scan table */
875 mutex_lock(&adapter->lock);
876 lbs_deb_scan("The scan table contains:\n");
877 list_for_each_entry (iter_bss, &adapter->network_list, list) {
878 lbs_deb_scan("scan %02d, %s, RSSI, %d, SSID '%s'\n",
879 i++, print_mac(mac, iter_bss->bssid), (s32) iter_bss->rssi,
880 escape_essid(iter_bss->ssid, iter_bss->ssid_len));
882 mutex_unlock(&adapter->lock);
885 if (adapter->connect_status == LBS_CONNECTED) {
886 netif_carrier_on(priv->dev);
887 netif_wake_queue(priv->dev);
890 if (priv->mesh_dev && (adapter->mesh_connect_status == LBS_CONNECTED)) {
891 netif_carrier_on(priv->mesh_dev);
892 netif_wake_queue(priv->mesh_dev);
900 kfree(scan_chan_list);
902 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
907 * @brief Interpret a BSS scan response returned from the firmware
909 * Parse the various fixed fields and IEs passed back for a a BSS probe
910 * response or beacon from the scan command. Record information as needed
911 * in the scan table struct bss_descriptor for that entry.
913 * @param bss Output parameter: Pointer to the BSS Entry
917 static int lbs_process_bss(struct bss_descriptor *bss,
918 u8 ** pbeaconinfo, int *bytesleft)
920 struct ieeetypes_fhparamset *pFH;
921 struct ieeetypes_dsparamset *pDS;
922 struct ieeetypes_cfparamset *pCF;
923 struct ieeetypes_ibssparamset *pibss;
924 DECLARE_MAC_BUF(mac);
925 struct ieeetypes_countryinfoset *pcountryinfo;
927 u8 n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0;
931 lbs_deb_enter(LBS_DEB_SCAN);
933 if (*bytesleft >= sizeof(beaconsize)) {
934 /* Extract & convert beacon size from the command buffer */
935 beaconsize = le16_to_cpu(get_unaligned((u16 *)*pbeaconinfo));
936 *bytesleft -= sizeof(beaconsize);
937 *pbeaconinfo += sizeof(beaconsize);
940 if (beaconsize == 0 || beaconsize > *bytesleft) {
941 *pbeaconinfo += *bytesleft;
947 /* Initialize the current working beacon pointer for this BSS iteration */
949 end = pos + beaconsize;
951 /* Advance the return beacon pointer past the current beacon */
952 *pbeaconinfo += beaconsize;
953 *bytesleft -= beaconsize;
955 memcpy(bss->bssid, pos, ETH_ALEN);
956 lbs_deb_scan("process_bss: AP BSSID %s\n", print_mac(mac, bss->bssid));
959 if ((end - pos) < 12) {
960 lbs_deb_scan("process_bss: Not enough bytes left\n");
966 * next 4 fields are RSSI, time stamp, beacon interval,
967 * and capability information
970 /* RSSI is 1 byte long */
972 lbs_deb_scan("process_bss: RSSI=%02X\n", *pos);
975 /* time stamp is 8 bytes long */
978 /* beacon interval is 2 bytes long */
979 bss->beaconperiod = le16_to_cpup((void *) pos);
982 /* capability information is 2 bytes long */
983 bss->capability = le16_to_cpup((void *) pos);
984 lbs_deb_scan("process_bss: capabilities = 0x%4X\n", bss->capability);
987 if (bss->capability & WLAN_CAPABILITY_PRIVACY)
988 lbs_deb_scan("process_bss: AP WEP enabled\n");
989 if (bss->capability & WLAN_CAPABILITY_IBSS)
990 bss->mode = IW_MODE_ADHOC;
992 bss->mode = IW_MODE_INFRA;
994 /* rest of the current buffer are IE's */
995 lbs_deb_scan("process_bss: IE length for this AP = %zd\n", end - pos);
996 lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos);
998 /* process variable IE */
999 while (pos <= end - 2) {
1000 struct ieee80211_info_element * elem =
1001 (struct ieee80211_info_element *) pos;
1003 if (pos + elem->len > end) {
1004 lbs_deb_scan("process_bss: error in processing IE, "
1005 "bytes left < IE length\n");
1010 case MFIE_TYPE_SSID:
1011 bss->ssid_len = elem->len;
1012 memcpy(bss->ssid, elem->data, elem->len);
1013 lbs_deb_scan("ssid '%s', ssid length %u\n",
1014 escape_essid(bss->ssid, bss->ssid_len),
1018 case MFIE_TYPE_RATES:
1019 n_basic_rates = min_t(u8, MAX_RATES, elem->len);
1020 memcpy(bss->rates, elem->data, n_basic_rates);
1021 got_basic_rates = 1;
1024 case MFIE_TYPE_FH_SET:
1025 pFH = (struct ieeetypes_fhparamset *) pos;
1026 memmove(&bss->phyparamset.fhparamset, pFH,
1027 sizeof(struct ieeetypes_fhparamset));
1028 #if 0 /* I think we can store these LE */
1029 bss->phyparamset.fhparamset.dwelltime
1030 = le16_to_cpu(bss->phyparamset.fhparamset.dwelltime);
1034 case MFIE_TYPE_DS_SET:
1035 pDS = (struct ieeetypes_dsparamset *) pos;
1036 bss->channel = pDS->currentchan;
1037 memcpy(&bss->phyparamset.dsparamset, pDS,
1038 sizeof(struct ieeetypes_dsparamset));
1041 case MFIE_TYPE_CF_SET:
1042 pCF = (struct ieeetypes_cfparamset *) pos;
1043 memcpy(&bss->ssparamset.cfparamset, pCF,
1044 sizeof(struct ieeetypes_cfparamset));
1047 case MFIE_TYPE_IBSS_SET:
1048 pibss = (struct ieeetypes_ibssparamset *) pos;
1049 bss->atimwindow = le32_to_cpu(pibss->atimwindow);
1050 memmove(&bss->ssparamset.ibssparamset, pibss,
1051 sizeof(struct ieeetypes_ibssparamset));
1053 bss->ssparamset.ibssparamset.atimwindow
1054 = le16_to_cpu(bss->ssparamset.ibssparamset.atimwindow);
1058 case MFIE_TYPE_COUNTRY:
1059 pcountryinfo = (struct ieeetypes_countryinfoset *) pos;
1060 if (pcountryinfo->len < sizeof(pcountryinfo->countrycode)
1061 || pcountryinfo->len > 254) {
1062 lbs_deb_scan("process_bss: 11D- Err "
1063 "CountryInfo len =%d min=%zd max=254\n",
1065 sizeof(pcountryinfo->countrycode));
1070 memcpy(&bss->countryinfo,
1071 pcountryinfo, pcountryinfo->len + 2);
1072 lbs_deb_hex(LBS_DEB_SCAN, "process_bss: 11d countryinfo",
1073 (u8 *) pcountryinfo,
1074 (u32) (pcountryinfo->len + 2));
1077 case MFIE_TYPE_RATES_EX:
1078 /* only process extended supported rate if data rate is
1079 * already found. Data rate IE should come before
1080 * extended supported rate IE
1082 if (!got_basic_rates)
1085 n_ex_rates = elem->len;
1086 if (n_basic_rates + n_ex_rates > MAX_RATES)
1087 n_ex_rates = MAX_RATES - n_basic_rates;
1089 p = bss->rates + n_basic_rates;
1090 memcpy(p, elem->data, n_ex_rates);
1093 case MFIE_TYPE_GENERIC:
1094 if (elem->len >= 4 &&
1095 elem->data[0] == 0x00 &&
1096 elem->data[1] == 0x50 &&
1097 elem->data[2] == 0xf2 &&
1098 elem->data[3] == 0x01) {
1099 bss->wpa_ie_len = min(elem->len + 2,
1101 memcpy(bss->wpa_ie, elem, bss->wpa_ie_len);
1102 lbs_deb_hex(LBS_DEB_SCAN, "process_bss: WPA IE", bss->wpa_ie,
1104 } else if (elem->len >= MARVELL_MESH_IE_LENGTH &&
1105 elem->data[0] == 0x00 &&
1106 elem->data[1] == 0x50 &&
1107 elem->data[2] == 0x43 &&
1108 elem->data[3] == 0x04) {
1114 bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN);
1115 memcpy(bss->rsn_ie, elem, bss->rsn_ie_len);
1116 lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE", bss->rsn_ie, elem->len);
1123 pos += elem->len + 2;
1127 bss->last_scanned = jiffies;
1128 lbs_unset_basic_rate_flags(bss->rates, sizeof(bss->rates));
1133 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1138 * @brief This function finds a specific compatible BSSID in the scan list
1140 * Used in association code
1142 * @param adapter A pointer to struct lbs_adapter
1143 * @param bssid BSSID to find in the scan list
1144 * @param mode Network mode: Infrastructure or IBSS
1146 * @return index in BSSID list, or error return code (< 0)
1148 struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_adapter *adapter,
1149 u8 * bssid, u8 mode)
1151 struct bss_descriptor * iter_bss;
1152 struct bss_descriptor * found_bss = NULL;
1154 lbs_deb_enter(LBS_DEB_SCAN);
1159 lbs_deb_hex(LBS_DEB_SCAN, "looking for",
1162 /* Look through the scan table for a compatible match. The loop will
1163 * continue past a matched bssid that is not compatible in case there
1164 * is an AP with multiple SSIDs assigned to the same BSSID
1166 mutex_lock(&adapter->lock);
1167 list_for_each_entry (iter_bss, &adapter->network_list, list) {
1168 if (compare_ether_addr(iter_bss->bssid, bssid))
1169 continue; /* bssid doesn't match */
1173 if (!is_network_compatible(adapter, iter_bss, mode))
1175 found_bss = iter_bss;
1178 found_bss = iter_bss;
1182 mutex_unlock(&adapter->lock);
1185 lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
1190 * @brief This function finds ssid in ssid list.
1192 * Used in association code
1194 * @param adapter A pointer to struct lbs_adapter
1195 * @param ssid SSID to find in the list
1196 * @param bssid BSSID to qualify the SSID selection (if provided)
1197 * @param mode Network mode: Infrastructure or IBSS
1199 * @return index in BSSID list
1201 struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_adapter *adapter,
1202 u8 *ssid, u8 ssid_len, u8 * bssid, u8 mode,
1206 struct bss_descriptor * iter_bss = NULL;
1207 struct bss_descriptor * found_bss = NULL;
1208 struct bss_descriptor * tmp_oldest = NULL;
1210 lbs_deb_enter(LBS_DEB_SCAN);
1212 mutex_lock(&adapter->lock);
1214 list_for_each_entry (iter_bss, &adapter->network_list, list) {
1216 || (iter_bss->last_scanned < tmp_oldest->last_scanned))
1217 tmp_oldest = iter_bss;
1219 if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len,
1220 ssid, ssid_len) != 0)
1221 continue; /* ssid doesn't match */
1222 if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0)
1223 continue; /* bssid doesn't match */
1224 if ((channel > 0) && (iter_bss->channel != channel))
1225 continue; /* channel doesn't match */
1230 if (!is_network_compatible(adapter, iter_bss, mode))
1234 /* Found requested BSSID */
1235 found_bss = iter_bss;
1239 if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
1240 bestrssi = SCAN_RSSI(iter_bss->rssi);
1241 found_bss = iter_bss;
1246 if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
1247 bestrssi = SCAN_RSSI(iter_bss->rssi);
1248 found_bss = iter_bss;
1255 mutex_unlock(&adapter->lock);
1256 lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
1261 * @brief This function finds the best SSID in the Scan List
1263 * Search the scan table for the best SSID that also matches the current
1264 * adapter network preference (infrastructure or adhoc)
1266 * @param adapter A pointer to struct lbs_adapter
1268 * @return index in BSSID list
1270 static struct bss_descriptor *lbs_find_best_ssid_in_list(
1271 struct lbs_adapter *adapter,
1275 struct bss_descriptor * iter_bss;
1276 struct bss_descriptor * best_bss = NULL;
1278 lbs_deb_enter(LBS_DEB_SCAN);
1280 mutex_lock(&adapter->lock);
1282 list_for_each_entry (iter_bss, &adapter->network_list, list) {
1286 if (!is_network_compatible(adapter, iter_bss, mode))
1288 if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
1290 bestrssi = SCAN_RSSI(iter_bss->rssi);
1291 best_bss = iter_bss;
1295 if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
1297 bestrssi = SCAN_RSSI(iter_bss->rssi);
1298 best_bss = iter_bss;
1303 mutex_unlock(&adapter->lock);
1304 lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss);
1309 * @brief Find the AP with specific ssid in the scan list
1311 * Used from association worker.
1313 * @param priv A pointer to struct lbs_private structure
1314 * @param pSSID A pointer to AP's ssid
1316 * @return 0--success, otherwise--fail
1318 int lbs_find_best_network_ssid(struct lbs_private *priv,
1319 u8 *out_ssid, u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode)
1321 struct lbs_adapter *adapter = priv->adapter;
1323 struct bss_descriptor * found;
1325 lbs_deb_enter(LBS_DEB_SCAN);
1327 lbs_scan_networks(priv, NULL, 1);
1328 if (adapter->surpriseremoved)
1331 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1333 found = lbs_find_best_ssid_in_list(adapter, preferred_mode);
1334 if (found && (found->ssid_len > 0)) {
1335 memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE);
1336 *out_ssid_len = found->ssid_len;
1337 *out_mode = found->mode;
1342 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1347 * @brief Scan Network
1349 * @param dev A pointer to net_device structure
1350 * @param info A pointer to iw_request_info structure
1351 * @param vwrq A pointer to iw_param structure
1352 * @param extra A pointer to extra data buf
1354 * @return 0 --success, otherwise fail
1356 int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
1357 struct iw_param *vwrq, char *extra)
1359 struct lbs_private *priv = dev->priv;
1360 struct lbs_adapter *adapter = priv->adapter;
1362 lbs_deb_enter(LBS_DEB_SCAN);
1364 if (!delayed_work_pending(&priv->scan_work)) {
1365 queue_delayed_work(priv->work_thread, &priv->scan_work,
1366 msecs_to_jiffies(50));
1369 if (adapter->surpriseremoved)
1372 lbs_deb_leave(LBS_DEB_SCAN);
1378 * @brief Send a scan command for all available channels filtered on a spec
1380 * Used in association code and from debugfs
1382 * @param priv A pointer to struct lbs_private structure
1383 * @param ssid A pointer to the SSID to scan for
1384 * @param ssid_len Length of the SSID
1385 * @param clear_ssid Should existing scan results with this SSID
1387 * @param prequestedssid A pointer to AP's ssid
1388 * @param keeppreviousscan Flag used to save/clear scan table before scan
1390 * @return 0-success, otherwise fail
1392 int lbs_send_specific_ssid_scan(struct lbs_private *priv,
1393 u8 *ssid, u8 ssid_len, u8 clear_ssid)
1395 struct lbs_adapter *adapter = priv->adapter;
1396 struct lbs_ioctl_user_scan_cfg scancfg;
1399 lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s', clear %d",
1400 escape_essid(ssid, ssid_len), clear_ssid);
1405 memset(&scancfg, 0x00, sizeof(scancfg));
1406 memcpy(scancfg.ssid, ssid, ssid_len);
1407 scancfg.ssid_len = ssid_len;
1408 scancfg.clear_ssid = clear_ssid;
1410 lbs_scan_networks(priv, &scancfg, 1);
1411 if (adapter->surpriseremoved) {
1415 wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1418 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
1425 /*********************************************************************/
1427 /* Support for Wireless Extensions */
1429 /*********************************************************************/
1431 #define MAX_CUSTOM_LEN 64
1433 static inline char *lbs_translate_scan(struct lbs_private *priv,
1434 char *start, char *stop,
1435 struct bss_descriptor *bss)
1437 struct lbs_adapter *adapter = priv->adapter;
1438 struct chan_freq_power *cfp;
1439 char *current_val; /* For rates */
1440 struct iw_event iwe; /* Temporary buffer */
1442 #define PERFECT_RSSI ((u8)50)
1443 #define WORST_RSSI ((u8)0)
1444 #define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
1447 lbs_deb_enter(LBS_DEB_SCAN);
1449 cfp = lbs_find_cfp_by_band_and_channel(adapter, 0, bss->channel);
1451 lbs_deb_scan("Invalid channel number %d\n", bss->channel);
1456 /* First entry *MUST* be the AP BSSID */
1457 iwe.cmd = SIOCGIWAP;
1458 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1459 memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN);
1460 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN);
1463 iwe.cmd = SIOCGIWESSID;
1464 iwe.u.data.flags = 1;
1465 iwe.u.data.length = min((u32) bss->ssid_len, (u32) IW_ESSID_MAX_SIZE);
1466 start = iwe_stream_add_point(start, stop, &iwe, bss->ssid);
1469 iwe.cmd = SIOCGIWMODE;
1470 iwe.u.mode = bss->mode;
1471 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN);
1474 iwe.cmd = SIOCGIWFREQ;
1475 iwe.u.freq.m = (long)cfp->freq * 100000;
1477 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN);
1479 /* Add quality statistics */
1481 iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
1482 iwe.u.qual.level = SCAN_RSSI(bss->rssi);
1484 rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
1486 (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
1487 (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
1488 (RSSI_DIFF * RSSI_DIFF);
1489 if (iwe.u.qual.qual > 100)
1490 iwe.u.qual.qual = 100;
1492 if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
1493 iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
1496 CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
1499 /* Locally created ad-hoc BSSs won't have beacons if this is the
1500 * only station in the adhoc network; so get signal strength
1501 * from receive statistics.
1503 if ((adapter->mode == IW_MODE_ADHOC)
1504 && adapter->adhoccreate
1505 && !lbs_ssid_cmp(adapter->curbssparams.ssid,
1506 adapter->curbssparams.ssid_len,
1507 bss->ssid, bss->ssid_len)) {
1509 snr = adapter->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
1510 nf = adapter->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
1511 iwe.u.qual.level = CAL_RSSI(snr, nf);
1513 start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN);
1515 /* Add encryption capability */
1516 iwe.cmd = SIOCGIWENCODE;
1517 if (bss->capability & WLAN_CAPABILITY_PRIVACY) {
1518 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1520 iwe.u.data.flags = IW_ENCODE_DISABLED;
1522 iwe.u.data.length = 0;
1523 start = iwe_stream_add_point(start, stop, &iwe, bss->ssid);
1525 current_val = start + IW_EV_LCP_LEN;
1527 iwe.cmd = SIOCGIWRATE;
1528 iwe.u.bitrate.fixed = 0;
1529 iwe.u.bitrate.disabled = 0;
1530 iwe.u.bitrate.value = 0;
1532 for (j = 0; bss->rates[j] && (j < sizeof(bss->rates)); j++) {
1533 /* Bit rate given in 500 kb/s units */
1534 iwe.u.bitrate.value = bss->rates[j] * 500000;
1535 current_val = iwe_stream_add_value(start, current_val,
1536 stop, &iwe, IW_EV_PARAM_LEN);
1538 if ((bss->mode == IW_MODE_ADHOC)
1539 && !lbs_ssid_cmp(adapter->curbssparams.ssid,
1540 adapter->curbssparams.ssid_len,
1541 bss->ssid, bss->ssid_len)
1542 && adapter->adhoccreate) {
1543 iwe.u.bitrate.value = 22 * 500000;
1544 current_val = iwe_stream_add_value(start, current_val,
1545 stop, &iwe, IW_EV_PARAM_LEN);
1547 /* Check if we added any event */
1548 if((current_val - start) > IW_EV_LCP_LEN)
1549 start = current_val;
1551 memset(&iwe, 0, sizeof(iwe));
1552 if (bss->wpa_ie_len) {
1553 char buf[MAX_WPA_IE_LEN];
1554 memcpy(buf, bss->wpa_ie, bss->wpa_ie_len);
1555 iwe.cmd = IWEVGENIE;
1556 iwe.u.data.length = bss->wpa_ie_len;
1557 start = iwe_stream_add_point(start, stop, &iwe, buf);
1560 memset(&iwe, 0, sizeof(iwe));
1561 if (bss->rsn_ie_len) {
1562 char buf[MAX_WPA_IE_LEN];
1563 memcpy(buf, bss->rsn_ie, bss->rsn_ie_len);
1564 iwe.cmd = IWEVGENIE;
1565 iwe.u.data.length = bss->rsn_ie_len;
1566 start = iwe_stream_add_point(start, stop, &iwe, buf);
1570 char custom[MAX_CUSTOM_LEN];
1573 iwe.cmd = IWEVCUSTOM;
1574 p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
1576 iwe.u.data.length = p - custom;
1577 if (iwe.u.data.length)
1578 start = iwe_stream_add_point(start, stop, &iwe, custom);
1582 lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start);
1587 * @brief Handle Retrieve scan table ioctl
1589 * @param dev A pointer to net_device structure
1590 * @param info A pointer to iw_request_info structure
1591 * @param dwrq A pointer to iw_point structure
1592 * @param extra A pointer to extra data buf
1594 * @return 0 --success, otherwise fail
1596 int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
1597 struct iw_point *dwrq, char *extra)
1599 #define SCAN_ITEM_SIZE 128
1600 struct lbs_private *priv = dev->priv;
1601 struct lbs_adapter *adapter = priv->adapter;
1604 char *stop = ev + dwrq->length;
1605 struct bss_descriptor * iter_bss;
1606 struct bss_descriptor * safe;
1608 lbs_deb_enter(LBS_DEB_SCAN);
1610 /* Update RSSI if current BSS is a locally created ad-hoc BSS */
1611 if ((adapter->mode == IW_MODE_ADHOC) && adapter->adhoccreate) {
1612 lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
1613 CMD_OPTION_WAITFORRSP, 0, NULL);
1616 mutex_lock(&adapter->lock);
1617 list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) {
1619 unsigned long stale_time;
1621 if (stop - ev < SCAN_ITEM_SIZE) {
1626 /* For mesh device, list only mesh networks */
1627 if (dev == priv->mesh_dev && !iter_bss->mesh)
1630 /* Prune old an old scan result */
1631 stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
1632 if (time_after(jiffies, stale_time)) {
1633 list_move_tail (&iter_bss->list,
1634 &adapter->network_free_list);
1635 clear_bss_descriptor(iter_bss);
1639 /* Translate to WE format this entry */
1640 next_ev = lbs_translate_scan(priv, ev, stop, iter_bss);
1641 if (next_ev == NULL)
1645 mutex_unlock(&adapter->lock);
1647 dwrq->length = (ev - extra);
1650 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", err);
1657 /*********************************************************************/
1659 /* Command execution */
1661 /*********************************************************************/
1665 * @brief Prepare a scan command to be sent to the firmware
1667 * Called from lbs_prepare_and_send_command() in cmd.c
1669 * Sends a fixed lenght data part (specifying the BSS type and BSSID filters)
1670 * as well as a variable number/length of TLVs to the firmware.
1672 * @param priv A pointer to struct lbs_private structure
1673 * @param cmd A pointer to cmd_ds_command structure to be sent to
1674 * firmware with the cmd_DS_801_11_SCAN structure
1675 * @param pdata_buf Void pointer cast of a lbs_scan_cmd_config struct used
1676 * to set the fields/TLVs for the command sent to firmware
1680 int lbs_cmd_80211_scan(struct lbs_private *priv,
1681 struct cmd_ds_command *cmd, void *pdata_buf)
1683 struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
1684 struct lbs_scan_cmd_config *pscancfg = pdata_buf;
1686 lbs_deb_enter(LBS_DEB_SCAN);
1688 /* Set fixed field variables in scan command */
1689 pscan->bsstype = pscancfg->bsstype;
1690 memcpy(pscan->bssid, pscancfg->bssid, ETH_ALEN);
1691 memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
1693 cmd->command = cpu_to_le16(CMD_802_11_SCAN);
1695 /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1696 cmd->size = cpu_to_le16(sizeof(pscan->bsstype) + ETH_ALEN
1697 + pscancfg->tlvbufferlen + S_DS_GEN);
1699 lbs_deb_scan("SCAN_CMD: command 0x%04x, size %d, seqnum %d\n",
1700 le16_to_cpu(cmd->command), le16_to_cpu(cmd->size),
1701 le16_to_cpu(cmd->seqnum));
1703 lbs_deb_leave(LBS_DEB_SCAN);
1707 static inline int is_same_network(struct bss_descriptor *src,
1708 struct bss_descriptor *dst)
1710 /* A network is only a duplicate if the channel, BSSID, and ESSID
1711 * all match. We treat all <hidden> with the same BSSID and channel
1713 return ((src->ssid_len == dst->ssid_len) &&
1714 (src->channel == dst->channel) &&
1715 !compare_ether_addr(src->bssid, dst->bssid) &&
1716 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1720 * @brief This function handles the command response of scan
1722 * Called from handle_cmd_response() in cmdrespc.
1724 * The response buffer for the scan command has the following
1727 * .-----------------------------------------------------------.
1728 * | header (4 * sizeof(u16)): Standard command response hdr |
1729 * .-----------------------------------------------------------.
1730 * | bufsize (u16) : sizeof the BSS Description data |
1731 * .-----------------------------------------------------------.
1732 * | NumOfSet (u8) : Number of BSS Descs returned |
1733 * .-----------------------------------------------------------.
1734 * | BSSDescription data (variable, size given in bufsize) |
1735 * .-----------------------------------------------------------.
1736 * | TLV data (variable, size calculated using header->size, |
1737 * | bufsize and sizeof the fixed fields above) |
1738 * .-----------------------------------------------------------.
1740 * @param priv A pointer to struct lbs_private structure
1741 * @param resp A pointer to cmd_ds_command
1745 int lbs_ret_80211_scan(struct lbs_private *priv, struct cmd_ds_command *resp)
1747 struct lbs_adapter *adapter = priv->adapter;
1748 struct cmd_ds_802_11_scan_rsp *pscan;
1749 struct bss_descriptor * iter_bss;
1750 struct bss_descriptor * safe;
1758 lbs_deb_enter(LBS_DEB_SCAN);
1760 /* Prune old entries from scan table */
1761 list_for_each_entry_safe (iter_bss, safe, &adapter->network_list, list) {
1762 unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
1763 if (time_before(jiffies, stale_time))
1765 list_move_tail (&iter_bss->list, &adapter->network_free_list);
1766 clear_bss_descriptor(iter_bss);
1769 pscan = &resp->params.scanresp;
1771 if (pscan->nr_sets > MAX_NETWORK_COUNT) {
1773 "SCAN_RESP: too many scan results (%d, max %d)!!\n",
1774 pscan->nr_sets, MAX_NETWORK_COUNT);
1779 bytesleft = le16_to_cpu(get_unaligned((u16*)&pscan->bssdescriptsize));
1780 lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft);
1782 scanrespsize = le16_to_cpu(get_unaligned((u16*)&resp->size));
1783 lbs_deb_scan("SCAN_RESP: returned %d AP before parsing\n",
1786 pbssinfo = pscan->bssdesc_and_tlvbuffer;
1788 /* The size of the TLV buffer is equal to the entire command response
1789 * size (scanrespsize) minus the fixed fields (sizeof()'s), the
1790 * BSS Descriptions (bssdescriptsize as bytesLef) and the command
1791 * response header (S_DS_GEN)
1793 tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
1794 + sizeof(pscan->nr_sets)
1798 * Process each scan response returned (pscan->nr_sets). Save
1799 * the information in the newbssentry and then insert into the
1800 * driver scan table either as an update to an existing entry
1801 * or as an addition at the end of the table
1803 for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
1804 struct bss_descriptor new;
1805 struct bss_descriptor * found = NULL;
1806 struct bss_descriptor * oldest = NULL;
1807 DECLARE_MAC_BUF(mac);
1809 /* Process the data fields and IEs returned for this BSS */
1810 memset(&new, 0, sizeof (struct bss_descriptor));
1811 if (lbs_process_bss(&new, &pbssinfo, &bytesleft) != 0) {
1812 /* error parsing the scan response, skipped */
1813 lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n");
1817 /* Try to find this bss in the scan table */
1818 list_for_each_entry (iter_bss, &adapter->network_list, list) {
1819 if (is_same_network(iter_bss, &new)) {
1824 if ((oldest == NULL) ||
1825 (iter_bss->last_scanned < oldest->last_scanned))
1830 /* found, clear it */
1831 clear_bss_descriptor(found);
1832 } else if (!list_empty(&adapter->network_free_list)) {
1833 /* Pull one from the free list */
1834 found = list_entry(adapter->network_free_list.next,
1835 struct bss_descriptor, list);
1836 list_move_tail(&found->list, &adapter->network_list);
1837 } else if (oldest) {
1838 /* If there are no more slots, expire the oldest */
1840 clear_bss_descriptor(found);
1841 list_move_tail(&found->list, &adapter->network_list);
1846 lbs_deb_scan("SCAN_RESP: BSSID = %s\n",
1847 print_mac(mac, new.bssid));
1849 /* Copy the locally created newbssentry to the scan table */
1850 memcpy(found, &new, offsetof(struct bss_descriptor, list));
1856 lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);