--- /dev/null
+/**
+ * Functions implementing wlan scan IOCTL and firmware command APIs
+ *
+ * IOCTL handlers as well as command preperation and response routines
+ * for sending scan commands to the firmware.
+ */
+#include <linux/ctype.h>
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <linux/wireless.h>
+#include <linux/etherdevice.h>
+
+#include <net/ieee80211.h>
+#include <net/iw_handler.h>
+
+#include <asm/unaligned.h>
+
+#include "host.h"
+#include "decl.h"
+#include "dev.h"
+#include "scan.h"
+#include "join.h"
+
+//! Approximate amount of data needed to pass a scan result back to iwlist
+#define MAX_SCAN_CELL_SIZE (IW_EV_ADDR_LEN \
+ + IW_ESSID_MAX_SIZE \
+ + IW_EV_UINT_LEN \
+ + IW_EV_FREQ_LEN \
+ + IW_EV_QUAL_LEN \
+ + IW_ESSID_MAX_SIZE \
+ + IW_EV_PARAM_LEN \
+ + 40) /* 40 for WPAIE */
+
+//! Memory needed to store a max sized channel List TLV for a firmware scan
+#define CHAN_TLV_MAX_SIZE (sizeof(struct mrvlietypesheader) \
+ + (MRVDRV_MAX_CHANNELS_PER_SCAN \
+ * sizeof(struct chanscanparamset)))
+
+//! Memory needed to store a max number/size SSID TLV for a firmware scan
+#define SSID_TLV_MAX_SIZE (1 * sizeof(struct mrvlietypes_ssidparamset))
+
+//! Maximum memory needed for a lbs_scan_cmd_config with all TLVs at max
+#define MAX_SCAN_CFG_ALLOC (sizeof(struct lbs_scan_cmd_config) \
+ + CHAN_TLV_MAX_SIZE \
+ + SSID_TLV_MAX_SIZE)
+
+//! The maximum number of channels the firmware can scan per command
+#define MRVDRV_MAX_CHANNELS_PER_SCAN 14
+
+/**
+ * @brief Number of channels to scan per firmware scan command issuance.
+ *
+ * Number restricted to prevent hitting the limit on the amount of scan data
+ * returned in a single firmware scan command.
+ */
+#define MRVDRV_CHANNELS_PER_SCAN_CMD 4
+
+//! Scan time specified in the channel TLV for each channel for passive scans
+#define MRVDRV_PASSIVE_SCAN_CHAN_TIME 100
+
+//! Scan time specified in the channel TLV for each channel for active scans
+#define MRVDRV_ACTIVE_SCAN_CHAN_TIME 100
+
+static const u8 zeromac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+static const u8 bcastmac[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+
+
+
+
+/*********************************************************************/
+/* */
+/* Misc helper functions */
+/* */
+/*********************************************************************/
+
+static inline void clear_bss_descriptor (struct bss_descriptor * bss)
+{
+ /* Don't blow away ->list, just BSS data */
+ memset(bss, 0, offsetof(struct bss_descriptor, list));
+}
+
+/**
+ * @brief Compare two SSIDs
+ *
+ * @param ssid1 A pointer to ssid to compare
+ * @param ssid2 A pointer to ssid to compare
+ *
+ * @return 0: ssid is same, otherwise is different
+ */
+int lbs_ssid_cmp(u8 *ssid1, u8 ssid1_len, u8 *ssid2, u8 ssid2_len)
+{
+ if (ssid1_len != ssid2_len)
+ return -1;
+
+ return memcmp(ssid1, ssid2, ssid1_len);
+}
+
+static inline int match_bss_no_security(struct lbs_802_11_security *secinfo,
+ struct bss_descriptor * match_bss)
+{
+ if ( !secinfo->wep_enabled
+ && !secinfo->WPAenabled
+ && !secinfo->WPA2enabled
+ && match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC
+ && match_bss->rsn_ie[0] != MFIE_TYPE_RSN
+ && !(match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
+ return 1;
+ }
+ return 0;
+}
+
+static inline int match_bss_static_wep(struct lbs_802_11_security *secinfo,
+ struct bss_descriptor * match_bss)
+{
+ if ( secinfo->wep_enabled
+ && !secinfo->WPAenabled
+ && !secinfo->WPA2enabled
+ && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
+ return 1;
+ }
+ return 0;
+}
+
+static inline int match_bss_wpa(struct lbs_802_11_security *secinfo,
+ struct bss_descriptor * match_bss)
+{
+ if ( !secinfo->wep_enabled
+ && secinfo->WPAenabled
+ && (match_bss->wpa_ie[0] == MFIE_TYPE_GENERIC)
+ /* privacy bit may NOT be set in some APs like LinkSys WRT54G
+ && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
+ */
+ ) {
+ return 1;
+ }
+ return 0;
+}
+
+static inline int match_bss_wpa2(struct lbs_802_11_security *secinfo,
+ struct bss_descriptor * match_bss)
+{
+ if ( !secinfo->wep_enabled
+ && secinfo->WPA2enabled
+ && (match_bss->rsn_ie[0] == MFIE_TYPE_RSN)
+ /* privacy bit may NOT be set in some APs like LinkSys WRT54G
+ && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
+ */
+ ) {
+ return 1;
+ }
+ return 0;
+}
+
+static inline int match_bss_dynamic_wep(struct lbs_802_11_security *secinfo,
+ struct bss_descriptor * match_bss)
+{
+ if ( !secinfo->wep_enabled
+ && !secinfo->WPAenabled
+ && !secinfo->WPA2enabled
+ && (match_bss->wpa_ie[0] != MFIE_TYPE_GENERIC)
+ && (match_bss->rsn_ie[0] != MFIE_TYPE_RSN)
+ && (match_bss->capability & WLAN_CAPABILITY_PRIVACY)) {
+ return 1;
+ }
+ return 0;
+}
+
+static inline int is_same_network(struct bss_descriptor *src,
+ struct bss_descriptor *dst)
+{
+ /* A network is only a duplicate if the channel, BSSID, and ESSID
+ * all match. We treat all <hidden> with the same BSSID and channel
+ * as one network */
+ return ((src->ssid_len == dst->ssid_len) &&
+ (src->channel == dst->channel) &&
+ !compare_ether_addr(src->bssid, dst->bssid) &&
+ !memcmp(src->ssid, dst->ssid, src->ssid_len));
+}
+
+/**
+ * @brief Check if a scanned network compatible with the driver settings
+ *
+ * WEP WPA WPA2 ad-hoc encrypt Network
+ * enabled enabled enabled AES mode privacy WPA WPA2 Compatible
+ * 0 0 0 0 NONE 0 0 0 yes No security
+ * 1 0 0 0 NONE 1 0 0 yes Static WEP
+ * 0 1 0 0 x 1x 1 x yes WPA
+ * 0 0 1 0 x 1x x 1 yes WPA2
+ * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
+ * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
+ *
+ *
+ * @param priv A pointer to struct lbs_private
+ * @param index Index in scantable to check against current driver settings
+ * @param mode Network mode: Infrastructure or IBSS
+ *
+ * @return Index in scantable, or error code if negative
+ */
+static int is_network_compatible(struct lbs_private *priv,
+ struct bss_descriptor * bss, u8 mode)
+{
+ int matched = 0;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ if (bss->mode != mode)
+ goto done;
+
+ if ((matched = match_bss_no_security(&priv->secinfo, bss))) {
+ goto done;
+ } else if ((matched = match_bss_static_wep(&priv->secinfo, bss))) {
+ goto done;
+ } else if ((matched = match_bss_wpa(&priv->secinfo, bss))) {
+ lbs_deb_scan(
+ "is_network_compatible() WPA: wpa_ie 0x%x "
+ "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
+ "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
+ priv->secinfo.wep_enabled ? "e" : "d",
+ priv->secinfo.WPAenabled ? "e" : "d",
+ priv->secinfo.WPA2enabled ? "e" : "d",
+ (bss->capability & WLAN_CAPABILITY_PRIVACY));
+ goto done;
+ } else if ((matched = match_bss_wpa2(&priv->secinfo, bss))) {
+ lbs_deb_scan(
+ "is_network_compatible() WPA2: wpa_ie 0x%x "
+ "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s "
+ "privacy 0x%x\n", bss->wpa_ie[0], bss->rsn_ie[0],
+ priv->secinfo.wep_enabled ? "e" : "d",
+ priv->secinfo.WPAenabled ? "e" : "d",
+ priv->secinfo.WPA2enabled ? "e" : "d",
+ (bss->capability & WLAN_CAPABILITY_PRIVACY));
+ goto done;
+ } else if ((matched = match_bss_dynamic_wep(&priv->secinfo, bss))) {
+ lbs_deb_scan(
+ "is_network_compatible() dynamic WEP: "
+ "wpa_ie 0x%x wpa2_ie 0x%x privacy 0x%x\n",
+ bss->wpa_ie[0], bss->rsn_ie[0],
+ (bss->capability & WLAN_CAPABILITY_PRIVACY));
+ goto done;
+ }
+
+ /* bss security settings don't match those configured on card */
+ lbs_deb_scan(
+ "is_network_compatible() FAILED: wpa_ie 0x%x "
+ "wpa2_ie 0x%x WEP %s WPA %s WPA2 %s privacy 0x%x\n",
+ bss->wpa_ie[0], bss->rsn_ie[0],
+ priv->secinfo.wep_enabled ? "e" : "d",
+ priv->secinfo.WPAenabled ? "e" : "d",
+ priv->secinfo.WPA2enabled ? "e" : "d",
+ (bss->capability & WLAN_CAPABILITY_PRIVACY));
+
+done:
+ lbs_deb_leave_args(LBS_DEB_SCAN, "matched: %d", matched);
+ return matched;
+}
+
+
+
+
+/*********************************************************************/
+/* */
+/* Main scanning support */
+/* */
+/*********************************************************************/
+
+void lbs_scan_worker(struct work_struct *work)
+{
+ struct lbs_private *priv =
+ container_of(work, struct lbs_private, scan_work.work);
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+ lbs_scan_networks(priv, NULL, 0);
+ lbs_deb_leave(LBS_DEB_SCAN);
+}
+
+
+/**
+ * @brief Create a channel list for the driver to scan based on region info
+ *
+ * Only used from lbs_scan_setup_scan_config()
+ *
+ * Use the driver region/band information to construct a comprehensive list
+ * of channels to scan. This routine is used for any scan that is not
+ * provided a specific channel list to scan.
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param scanchanlist Output parameter: resulting channel list to scan
+ * @param filteredscan Flag indicating whether or not a BSSID or SSID filter
+ * is being sent in the command to firmware. Used to
+ * increase the number of channels sent in a scan
+ * command and to disable the firmware channel scan
+ * filter.
+ *
+ * @return void
+ */
+static int lbs_scan_create_channel_list(struct lbs_private *priv,
+ struct chanscanparamset * scanchanlist,
+ u8 filteredscan)
+{
+
+ struct region_channel *scanregion;
+ struct chan_freq_power *cfp;
+ int rgnidx;
+ int chanidx;
+ int nextchan;
+ u8 scantype;
+
+ chanidx = 0;
+
+ /* Set the default scan type to the user specified type, will later
+ * be changed to passive on a per channel basis if restricted by
+ * regulatory requirements (11d or 11h)
+ */
+ scantype = CMD_SCAN_TYPE_ACTIVE;
+
+ for (rgnidx = 0; rgnidx < ARRAY_SIZE(priv->region_channel); rgnidx++) {
+ if (priv->enable11d &&
+ (priv->connect_status != LBS_CONNECTED) &&
+ (priv->mesh_connect_status != LBS_CONNECTED)) {
+ /* Scan all the supported chan for the first scan */
+ if (!priv->universal_channel[rgnidx].valid)
+ continue;
+ scanregion = &priv->universal_channel[rgnidx];
+
+ /* clear the parsed_region_chan for the first scan */
+ memset(&priv->parsed_region_chan, 0x00,
+ sizeof(priv->parsed_region_chan));
+ } else {
+ if (!priv->region_channel[rgnidx].valid)
+ continue;
+ scanregion = &priv->region_channel[rgnidx];
+ }
+
+ for (nextchan = 0;
+ nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
+
+ cfp = scanregion->CFP + nextchan;
+
+ if (priv->enable11d) {
+ scantype =
+ lbs_get_scan_type_11d(cfp->channel,
+ &priv->
+ parsed_region_chan);
+ }
+
+ switch (scanregion->band) {
+ case BAND_B:
+ case BAND_G:
+ default:
+ scanchanlist[chanidx].radiotype =
+ CMD_SCAN_RADIO_TYPE_BG;
+ break;
+ }
+
+ if (scantype == CMD_SCAN_TYPE_PASSIVE) {
+ scanchanlist[chanidx].maxscantime =
+ cpu_to_le16(MRVDRV_PASSIVE_SCAN_CHAN_TIME);
+ scanchanlist[chanidx].chanscanmode.passivescan =
+ 1;
+ } else {
+ scanchanlist[chanidx].maxscantime =
+ cpu_to_le16(MRVDRV_ACTIVE_SCAN_CHAN_TIME);
+ scanchanlist[chanidx].chanscanmode.passivescan =
+ 0;
+ }
+
+ scanchanlist[chanidx].channumber = cfp->channel;
+
+ if (filteredscan) {
+ scanchanlist[chanidx].chanscanmode.
+ disablechanfilt = 1;
+ }
+ }
+ }
+ return chanidx;
+}
+
+
+/*
+ * Add SSID TLV of the form:
+ *
+ * TLV-ID SSID 00 00
+ * length 06 00
+ * ssid 4d 4e 54 45 53 54
+ */
+static int lbs_scan_add_ssid_tlv(u8 *tlv,
+ const struct lbs_ioctl_user_scan_cfg *user_cfg)
+{
+ struct mrvlietypes_ssidparamset *ssid_tlv =
+ (struct mrvlietypes_ssidparamset *)tlv;
+ ssid_tlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
+ ssid_tlv->header.len = cpu_to_le16(user_cfg->ssid_len);
+ memcpy(ssid_tlv->ssid, user_cfg->ssid, user_cfg->ssid_len);
+ return sizeof(ssid_tlv->header) + user_cfg->ssid_len;
+}
+
+
+/*
+ * Add CHANLIST TLV of the form
+ *
+ * TLV-ID CHANLIST 01 01
+ * length 5b 00
+ * channel 1 00 01 00 00 00 64 00
+ * radio type 00
+ * channel 01
+ * scan type 00
+ * min scan time 00 00
+ * max scan time 64 00
+ * channel 2 00 02 00 00 00 64 00
+ * channel 3 00 03 00 00 00 64 00
+ * channel 4 00 04 00 00 00 64 00
+ * channel 5 00 05 00 00 00 64 00
+ * channel 6 00 06 00 00 00 64 00
+ * channel 7 00 07 00 00 00 64 00
+ * channel 8 00 08 00 00 00 64 00
+ * channel 9 00 09 00 00 00 64 00
+ * channel 10 00 0a 00 00 00 64 00
+ * channel 11 00 0b 00 00 00 64 00
+ * channel 12 00 0c 00 00 00 64 00
+ * channel 13 00 0d 00 00 00 64 00
+ *
+ */
+static int lbs_scan_add_chanlist_tlv(u8 *tlv,
+ struct chanscanparamset *chan_list,
+ int chan_count)
+{
+ size_t size = sizeof(struct chanscanparamset) * chan_count;
+ struct mrvlietypes_chanlistparamset *chan_tlv =
+ (struct mrvlietypes_chanlistparamset *) tlv;
+
+ chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+ memcpy(chan_tlv->chanscanparam, chan_list, size);
+ chan_tlv->header.len = cpu_to_le16(size);
+ return sizeof(chan_tlv->header) + size;
+}
+
+
+/*
+ * Add RATES TLV of the form
+ *
+ * TLV-ID RATES 01 00
+ * length 0e 00
+ * rates 82 84 8b 96 0c 12 18 24 30 48 60 6c
+ *
+ * The rates are in lbs_bg_rates[], but for the 802.11b
+ * rates the high bit isn't set.
+ */
+static int lbs_scan_add_rates_tlv(u8 *tlv)
+{
+ int i;
+ struct mrvlietypes_ratesparamset *rate_tlv =
+ (struct mrvlietypes_ratesparamset *) tlv;
+
+ rate_tlv->header.type = cpu_to_le16(TLV_TYPE_RATES);
+ tlv += sizeof(rate_tlv->header);
+ for (i = 0; i < MAX_RATES; i++) {
+ *tlv = lbs_bg_rates[i];
+ if (*tlv == 0)
+ break;
+ /* This code makes sure that the 802.11b rates (1 MBit/s, 2
+ MBit/s, 5.5 MBit/s and 11 MBit/s get's the high bit set.
+ Note that the values are MBit/s * 2, to mark them as
+ basic rates so that the firmware likes it better */
+ if (*tlv == 0x02 || *tlv == 0x04 ||
+ *tlv == 0x0b || *tlv == 0x16)
+ *tlv |= 0x80;
+ tlv++;
+ }
+ rate_tlv->header.len = cpu_to_le16(i);
+ return sizeof(rate_tlv->header) + i;
+}
+
+
+/*
+ * Generate the CMD_802_11_SCAN command with the proper tlv
+ * for a bunch of channels.
+ */
+static int lbs_do_scan(struct lbs_private *priv,
+ u8 bsstype,
+ struct chanscanparamset *chan_list,
+ int chan_count,
+ const struct lbs_ioctl_user_scan_cfg *user_cfg)
+{
+ int ret = -ENOMEM;
+ struct lbs_scan_cmd_config *scan_cmd;
+ u8 *tlv; /* pointer into our current, growing TLV storage area */
+
+ lbs_deb_enter_args(LBS_DEB_SCAN, "bsstype %d, chanlist[].chan %d, "
+ "chan_count %d",
+ bsstype, chan_list[0].channumber, chan_count);
+
+ /* create the fixed part for scan command */
+ scan_cmd = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
+ if (scan_cmd == NULL)
+ goto out;
+ tlv = scan_cmd->tlvbuffer;
+ if (user_cfg)
+ memcpy(scan_cmd->bssid, user_cfg->bssid, ETH_ALEN);
+ scan_cmd->bsstype = bsstype;
+
+ /* add TLVs */
+ if (user_cfg && user_cfg->ssid_len)
+ tlv += lbs_scan_add_ssid_tlv(tlv, user_cfg);
+ if (chan_list && chan_count)
+ tlv += lbs_scan_add_chanlist_tlv(tlv, chan_list, chan_count);
+ tlv += lbs_scan_add_rates_tlv(tlv);
+
+ /* This is the final data we are about to send */
+ scan_cmd->tlvbufferlen = tlv - scan_cmd->tlvbuffer;
+ lbs_deb_hex(LBS_DEB_SCAN, "SCAN_CMD", (void *)scan_cmd, 1+6);
+ lbs_deb_hex(LBS_DEB_SCAN, "SCAN_TLV", scan_cmd->tlvbuffer,
+ scan_cmd->tlvbufferlen);
+
+ ret = lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, 0,
+ CMD_OPTION_WAITFORRSP, 0, scan_cmd);
+out:
+ kfree(scan_cmd);
+ lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
+ return ret;
+}
+
+
+/**
+ * @brief Internal function used to start a scan based on an input config
+ *
+ * Also used from debugfs
+ *
+ * Use the input user scan configuration information when provided in
+ * order to send the appropriate scan commands to firmware to populate or
+ * update the internal driver scan table
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param puserscanin Pointer to the input configuration for the requested
+ * scan.
+ *
+ * @return 0 or < 0 if error
+ */
+int lbs_scan_networks(struct lbs_private *priv,
+ const struct lbs_ioctl_user_scan_cfg *user_cfg,
+ int full_scan)
+{
+ int ret = -ENOMEM;
+ struct chanscanparamset *chan_list;
+ struct chanscanparamset *curr_chans;
+ int chan_count;
+ u8 bsstype = CMD_BSS_TYPE_ANY;
+ int numchannels = MRVDRV_CHANNELS_PER_SCAN_CMD;
+ int filteredscan = 0;
+ union iwreq_data wrqu;
+#ifdef CONFIG_LIBERTAS_DEBUG
+ struct bss_descriptor *iter;
+ int i = 0;
+ DECLARE_MAC_BUF(mac);
+#endif
+
+ lbs_deb_enter_args(LBS_DEB_SCAN, "full_scan %d",
+ full_scan);
+
+ /* Cancel any partial outstanding partial scans if this scan
+ * is a full scan.
+ */
+ if (full_scan && delayed_work_pending(&priv->scan_work))
+ cancel_delayed_work(&priv->scan_work);
+
+ /* Determine same scan parameters */
+ if (user_cfg) {
+ if (user_cfg->bsstype)
+ bsstype = user_cfg->bsstype;
+ if (compare_ether_addr(user_cfg->bssid, &zeromac[0]) != 0) {
+ numchannels = MRVDRV_MAX_CHANNELS_PER_SCAN;
+ filteredscan = 1;
+ }
+ }
+ lbs_deb_scan("numchannels %d, bsstype %d, "
+ "filteredscan %d\n",
+ numchannels, bsstype, filteredscan);
+
+ /* Create list of channels to scan */
+ chan_list = kzalloc(sizeof(struct chanscanparamset) *
+ LBS_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
+ if (!chan_list) {
+ lbs_pr_alert("SCAN: chan_list empty\n");
+ goto out;
+ }
+
+ /* We want to scan all channels */
+ chan_count = lbs_scan_create_channel_list(priv, chan_list,
+ filteredscan);
+
+ netif_stop_queue(priv->dev);
+ netif_carrier_off(priv->dev);
+ if (priv->mesh_dev) {
+ netif_stop_queue(priv->mesh_dev);
+ netif_carrier_off(priv->mesh_dev);
+ }
+
+ /* Prepare to continue an interrupted scan */
+ lbs_deb_scan("chan_count %d, last_scanned_channel %d\n",
+ chan_count, priv->last_scanned_channel);
+ curr_chans = chan_list;
+ /* advance channel list by already-scanned-channels */
+ if (priv->last_scanned_channel > 0) {
+ curr_chans += priv->last_scanned_channel;
+ chan_count -= priv->last_scanned_channel;
+ }
+
+ /* Send scan command(s)
+ * numchannels contains the number of channels we should maximally scan
+ * chan_count is the total number of channels to scan
+ */
+
+ while (chan_count) {
+ int to_scan = min(numchannels, chan_count);
+ lbs_deb_scan("scanning %d of %d channels\n",
+ to_scan, chan_count);
+ ret = lbs_do_scan(priv, bsstype, curr_chans,
+ to_scan, user_cfg);
+ if (ret) {
+ lbs_pr_err("SCAN_CMD failed\n");
+ goto out2;
+ }
+ curr_chans += to_scan;
+ chan_count -= to_scan;
+
+ /* somehow schedule the next part of the scan */
+ if (chan_count &&
+ !full_scan &&
+ !priv->surpriseremoved) {
+ /* -1 marks just that we're currently scanning */
+ if (priv->last_scanned_channel < 0)
+ priv->last_scanned_channel = to_scan;
+ else
+ priv->last_scanned_channel += to_scan;
+ cancel_delayed_work(&priv->scan_work);
+ queue_delayed_work(priv->work_thread, &priv->scan_work,
+ msecs_to_jiffies(300));
+ /* skip over GIWSCAN event */
+ goto out;
+ }
+
+ }
+ memset(&wrqu, 0, sizeof(union iwreq_data));
+ wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
+
+#ifdef CONFIG_LIBERTAS_DEBUG
+ /* Dump the scan table */
+ mutex_lock(&priv->lock);
+ lbs_deb_scan("scan table:\n");
+ list_for_each_entry(iter, &priv->network_list, list)
+ lbs_deb_scan("%02d: BSSID %s, RSSI %d, SSID '%s'\n",
+ i++, print_mac(mac, iter->bssid), (s32) iter->rssi,
+ escape_essid(iter->ssid, iter->ssid_len));
+ mutex_unlock(&priv->lock);
+#endif
+
+out2:
+ priv->last_scanned_channel = 0;
+
+out:
+ if (priv->connect_status == LBS_CONNECTED) {
+ netif_carrier_on(priv->dev);
+ netif_wake_queue(priv->dev);
+ }
+ if (priv->mesh_dev && (priv->mesh_connect_status == LBS_CONNECTED)) {
+ netif_carrier_on(priv->mesh_dev);
+ netif_wake_queue(priv->mesh_dev);
+ }
+ kfree(chan_list);
+
+ lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
+ return ret;
+}
+
+
+
+
+/*********************************************************************/
+/* */
+/* Result interpretation */
+/* */
+/*********************************************************************/
+
+/**
+ * @brief Interpret a BSS scan response returned from the firmware
+ *
+ * Parse the various fixed fields and IEs passed back for a a BSS probe
+ * response or beacon from the scan command. Record information as needed
+ * in the scan table struct bss_descriptor for that entry.
+ *
+ * @param bss Output parameter: Pointer to the BSS Entry
+ *
+ * @return 0 or -1
+ */
+static int lbs_process_bss(struct bss_descriptor *bss,
+ u8 ** pbeaconinfo, int *bytesleft)
+{
+ struct ieeetypes_fhparamset *pFH;
+ struct ieeetypes_dsparamset *pDS;
+ struct ieeetypes_cfparamset *pCF;
+ struct ieeetypes_ibssparamset *pibss;
+ DECLARE_MAC_BUF(mac);
+ struct ieeetypes_countryinfoset *pcountryinfo;
+ u8 *pos, *end, *p;
+ u8 n_ex_rates = 0, got_basic_rates = 0, n_basic_rates = 0;
+ u16 beaconsize = 0;
+ int ret;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ if (*bytesleft >= sizeof(beaconsize)) {
+ /* Extract & convert beacon size from the command buffer */
+ beaconsize = le16_to_cpu(get_unaligned((__le16 *)*pbeaconinfo));
+ *bytesleft -= sizeof(beaconsize);
+ *pbeaconinfo += sizeof(beaconsize);
+ }
+
+ if (beaconsize == 0 || beaconsize > *bytesleft) {
+ *pbeaconinfo += *bytesleft;
+ *bytesleft = 0;
+ ret = -1;
+ goto done;
+ }
+
+ /* Initialize the current working beacon pointer for this BSS iteration */
+ pos = *pbeaconinfo;
+ end = pos + beaconsize;
+
+ /* Advance the return beacon pointer past the current beacon */
+ *pbeaconinfo += beaconsize;
+ *bytesleft -= beaconsize;
+
+ memcpy(bss->bssid, pos, ETH_ALEN);
+ lbs_deb_scan("process_bss: BSSID %s\n", print_mac(mac, bss->bssid));
+ pos += ETH_ALEN;
+
+ if ((end - pos) < 12) {
+ lbs_deb_scan("process_bss: Not enough bytes left\n");
+ ret = -1;
+ goto done;
+ }
+
+ /*
+ * next 4 fields are RSSI, time stamp, beacon interval,
+ * and capability information
+ */
+
+ /* RSSI is 1 byte long */
+ bss->rssi = *pos;
+ lbs_deb_scan("process_bss: RSSI %d\n", *pos);
+ pos++;
+
+ /* time stamp is 8 bytes long */
+ pos += 8;
+
+ /* beacon interval is 2 bytes long */
+ bss->beaconperiod = le16_to_cpup((void *) pos);
+ pos += 2;
+
+ /* capability information is 2 bytes long */
+ bss->capability = le16_to_cpup((void *) pos);
+ lbs_deb_scan("process_bss: capabilities 0x%04x\n", bss->capability);
+ pos += 2;
+
+ if (bss->capability & WLAN_CAPABILITY_PRIVACY)
+ lbs_deb_scan("process_bss: WEP enabled\n");
+ if (bss->capability & WLAN_CAPABILITY_IBSS)
+ bss->mode = IW_MODE_ADHOC;
+ else
+ bss->mode = IW_MODE_INFRA;
+
+ /* rest of the current buffer are IE's */
+ lbs_deb_scan("process_bss: IE len %zd\n", end - pos);
+ lbs_deb_hex(LBS_DEB_SCAN, "process_bss: IE info", pos, end - pos);
+
+ /* process variable IE */
+ while (pos <= end - 2) {
+ struct ieee80211_info_element * elem =
+ (struct ieee80211_info_element *) pos;
+
+ if (pos + elem->len > end) {
+ lbs_deb_scan("process_bss: error in processing IE, "
+ "bytes left < IE length\n");
+ break;
+ }
+
+ switch (elem->id) {
+ case MFIE_TYPE_SSID:
+ bss->ssid_len = elem->len;
+ memcpy(bss->ssid, elem->data, elem->len);
+ lbs_deb_scan("got SSID IE: '%s', len %u\n",
+ escape_essid(bss->ssid, bss->ssid_len),
+ bss->ssid_len);
+ break;
+
+ case MFIE_TYPE_RATES:
+ n_basic_rates = min_t(u8, MAX_RATES, elem->len);
+ memcpy(bss->rates, elem->data, n_basic_rates);
+ got_basic_rates = 1;
+ lbs_deb_scan("got RATES IE\n");
+ break;
+
+ case MFIE_TYPE_FH_SET:
+ pFH = (struct ieeetypes_fhparamset *) pos;
+ memmove(&bss->phyparamset.fhparamset, pFH,
+ sizeof(struct ieeetypes_fhparamset));
+ lbs_deb_scan("got FH IE\n");
+ break;
+
+ case MFIE_TYPE_DS_SET:
+ pDS = (struct ieeetypes_dsparamset *) pos;
+ bss->channel = pDS->currentchan;
+ memcpy(&bss->phyparamset.dsparamset, pDS,
+ sizeof(struct ieeetypes_dsparamset));
+ lbs_deb_scan("got DS IE, channel %d\n", bss->channel);
+ break;
+
+ case MFIE_TYPE_CF_SET:
+ pCF = (struct ieeetypes_cfparamset *) pos;
+ memcpy(&bss->ssparamset.cfparamset, pCF,
+ sizeof(struct ieeetypes_cfparamset));
+ lbs_deb_scan("got CF IE\n");
+ break;
+
+ case MFIE_TYPE_IBSS_SET:
+ pibss = (struct ieeetypes_ibssparamset *) pos;
+ bss->atimwindow = le16_to_cpu(pibss->atimwindow);
+ memmove(&bss->ssparamset.ibssparamset, pibss,
+ sizeof(struct ieeetypes_ibssparamset));
+ lbs_deb_scan("got IBSS IE\n");
+ break;
+
+ case MFIE_TYPE_COUNTRY:
+ pcountryinfo = (struct ieeetypes_countryinfoset *) pos;
+ lbs_deb_scan("got COUNTRY IE\n");
+ if (pcountryinfo->len < sizeof(pcountryinfo->countrycode)
+ || pcountryinfo->len > 254) {
+ lbs_deb_scan("process_bss: 11D- Err "
+ "CountryInfo len %d, min %zd, max 254\n",
+ pcountryinfo->len,
+ sizeof(pcountryinfo->countrycode));
+ ret = -1;
+ goto done;
+ }
+
+ memcpy(&bss->countryinfo,
+ pcountryinfo, pcountryinfo->len + 2);
+ lbs_deb_hex(LBS_DEB_SCAN, "process_bss: 11d countryinfo",
+ (u8 *) pcountryinfo,
+ (u32) (pcountryinfo->len + 2));
+ break;
+
+ case MFIE_TYPE_RATES_EX:
+ /* only process extended supported rate if data rate is
+ * already found. Data rate IE should come before
+ * extended supported rate IE
+ */
+ lbs_deb_scan("got RATESEX IE\n");
+ if (!got_basic_rates) {
+ lbs_deb_scan("... but ignoring it\n");
+ break;
+ }
+
+ n_ex_rates = elem->len;
+ if (n_basic_rates + n_ex_rates > MAX_RATES)
+ n_ex_rates = MAX_RATES - n_basic_rates;
+
+ p = bss->rates + n_basic_rates;
+ memcpy(p, elem->data, n_ex_rates);
+ break;
+
+ case MFIE_TYPE_GENERIC:
+ if (elem->len >= 4 &&
+ elem->data[0] == 0x00 &&
+ elem->data[1] == 0x50 &&
+ elem->data[2] == 0xf2 &&
+ elem->data[3] == 0x01) {
+ bss->wpa_ie_len = min(elem->len + 2,
+ MAX_WPA_IE_LEN);
+ memcpy(bss->wpa_ie, elem, bss->wpa_ie_len);
+ lbs_deb_scan("got WPA IE\n");
+ lbs_deb_hex(LBS_DEB_SCAN, "WPA IE", bss->wpa_ie,
+ elem->len);
+ } else if (elem->len >= MARVELL_MESH_IE_LENGTH &&
+ elem->data[0] == 0x00 &&
+ elem->data[1] == 0x50 &&
+ elem->data[2] == 0x43 &&
+ elem->data[3] == 0x04) {
+ lbs_deb_scan("got mesh IE\n");
+ bss->mesh = 1;
+ } else {
+ lbs_deb_scan("got generiec IE: "
+ "%02x:%02x:%02x:%02x, len %d\n",
+ elem->data[0], elem->data[1],
+ elem->data[2], elem->data[3],
+ elem->len);
+ }
+ break;
+
+ case MFIE_TYPE_RSN:
+ lbs_deb_scan("got RSN IE\n");
+ bss->rsn_ie_len = min(elem->len + 2, MAX_WPA_IE_LEN);
+ memcpy(bss->rsn_ie, elem, bss->rsn_ie_len);
+ lbs_deb_hex(LBS_DEB_SCAN, "process_bss: RSN_IE",
+ bss->rsn_ie, elem->len);
+ break;
+
+ default:
+ lbs_deb_scan("got IE 0x%04x, len %d\n",
+ elem->id, elem->len);
+ break;
+ }
+
+ pos += elem->len + 2;
+ }
+
+ /* Timestamp */
+ bss->last_scanned = jiffies;
+ lbs_unset_basic_rate_flags(bss->rates, sizeof(bss->rates));
+
+ ret = 0;
+
+done:
+ lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
+ return ret;
+}
+
+/**
+ * @brief This function finds a specific compatible BSSID in the scan list
+ *
+ * Used in association code
+ *
+ * @param priv A pointer to struct lbs_private
+ * @param bssid BSSID to find in the scan list
+ * @param mode Network mode: Infrastructure or IBSS
+ *
+ * @return index in BSSID list, or error return code (< 0)
+ */
+struct bss_descriptor *lbs_find_bssid_in_list(struct lbs_private *priv,
+ u8 * bssid, u8 mode)
+{
+ struct bss_descriptor * iter_bss;
+ struct bss_descriptor * found_bss = NULL;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ if (!bssid)
+ goto out;
+
+ lbs_deb_hex(LBS_DEB_SCAN, "looking for",
+ bssid, ETH_ALEN);
+
+ /* Look through the scan table for a compatible match. The loop will
+ * continue past a matched bssid that is not compatible in case there
+ * is an AP with multiple SSIDs assigned to the same BSSID
+ */
+ mutex_lock(&priv->lock);
+ list_for_each_entry (iter_bss, &priv->network_list, list) {
+ if (compare_ether_addr(iter_bss->bssid, bssid))
+ continue; /* bssid doesn't match */
+ switch (mode) {
+ case IW_MODE_INFRA:
+ case IW_MODE_ADHOC:
+ if (!is_network_compatible(priv, iter_bss, mode))
+ break;
+ found_bss = iter_bss;
+ break;
+ default:
+ found_bss = iter_bss;
+ break;
+ }
+ }
+ mutex_unlock(&priv->lock);
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
+ return found_bss;
+}
+
+/**
+ * @brief This function finds ssid in ssid list.
+ *
+ * Used in association code
+ *
+ * @param priv A pointer to struct lbs_private
+ * @param ssid SSID to find in the list
+ * @param bssid BSSID to qualify the SSID selection (if provided)
+ * @param mode Network mode: Infrastructure or IBSS
+ *
+ * @return index in BSSID list
+ */
+struct bss_descriptor *lbs_find_ssid_in_list(struct lbs_private *priv,
+ u8 *ssid, u8 ssid_len, u8 * bssid, u8 mode,
+ int channel)
+{
+ u8 bestrssi = 0;
+ struct bss_descriptor * iter_bss = NULL;
+ struct bss_descriptor * found_bss = NULL;
+ struct bss_descriptor * tmp_oldest = NULL;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ mutex_lock(&priv->lock);
+
+ list_for_each_entry (iter_bss, &priv->network_list, list) {
+ if ( !tmp_oldest
+ || (iter_bss->last_scanned < tmp_oldest->last_scanned))
+ tmp_oldest = iter_bss;
+
+ if (lbs_ssid_cmp(iter_bss->ssid, iter_bss->ssid_len,
+ ssid, ssid_len) != 0)
+ continue; /* ssid doesn't match */
+ if (bssid && compare_ether_addr(iter_bss->bssid, bssid) != 0)
+ continue; /* bssid doesn't match */
+ if ((channel > 0) && (iter_bss->channel != channel))
+ continue; /* channel doesn't match */
+
+ switch (mode) {
+ case IW_MODE_INFRA:
+ case IW_MODE_ADHOC:
+ if (!is_network_compatible(priv, iter_bss, mode))
+ break;
+
+ if (bssid) {
+ /* Found requested BSSID */
+ found_bss = iter_bss;
+ goto out;
+ }
+
+ if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
+ bestrssi = SCAN_RSSI(iter_bss->rssi);
+ found_bss = iter_bss;
+ }
+ break;
+ case IW_MODE_AUTO:
+ default:
+ if (SCAN_RSSI(iter_bss->rssi) > bestrssi) {
+ bestrssi = SCAN_RSSI(iter_bss->rssi);
+ found_bss = iter_bss;
+ }
+ break;
+ }
+ }
+
+out:
+ mutex_unlock(&priv->lock);
+ lbs_deb_leave_args(LBS_DEB_SCAN, "found_bss %p", found_bss);
+ return found_bss;
+}
+
+/**
+ * @brief This function finds the best SSID in the Scan List
+ *
+ * Search the scan table for the best SSID that also matches the current
+ * adapter network preference (infrastructure or adhoc)
+ *
+ * @param priv A pointer to struct lbs_private
+ *
+ * @return index in BSSID list
+ */
+static struct bss_descriptor *lbs_find_best_ssid_in_list(
+ struct lbs_private *priv,
+ u8 mode)
+{
+ u8 bestrssi = 0;
+ struct bss_descriptor * iter_bss;
+ struct bss_descriptor * best_bss = NULL;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ mutex_lock(&priv->lock);
+
+ list_for_each_entry (iter_bss, &priv->network_list, list) {
+ switch (mode) {
+ case IW_MODE_INFRA:
+ case IW_MODE_ADHOC:
+ if (!is_network_compatible(priv, iter_bss, mode))
+ break;
+ if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
+ break;
+ bestrssi = SCAN_RSSI(iter_bss->rssi);
+ best_bss = iter_bss;
+ break;
+ case IW_MODE_AUTO:
+ default:
+ if (SCAN_RSSI(iter_bss->rssi) <= bestrssi)
+ break;
+ bestrssi = SCAN_RSSI(iter_bss->rssi);
+ best_bss = iter_bss;
+ break;
+ }
+ }
+
+ mutex_unlock(&priv->lock);
+ lbs_deb_leave_args(LBS_DEB_SCAN, "best_bss %p", best_bss);
+ return best_bss;
+}
+
+/**
+ * @brief Find the AP with specific ssid in the scan list
+ *
+ * Used from association worker.
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param pSSID A pointer to AP's ssid
+ *
+ * @return 0--success, otherwise--fail
+ */
+int lbs_find_best_network_ssid(struct lbs_private *priv,
+ u8 *out_ssid, u8 *out_ssid_len, u8 preferred_mode, u8 *out_mode)
+{
+ int ret = -1;
+ struct bss_descriptor * found;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ lbs_scan_networks(priv, NULL, 1);
+ if (priv->surpriseremoved)
+ goto out;
+
+ found = lbs_find_best_ssid_in_list(priv, preferred_mode);
+ if (found && (found->ssid_len > 0)) {
+ memcpy(out_ssid, &found->ssid, IW_ESSID_MAX_SIZE);
+ *out_ssid_len = found->ssid_len;
+ *out_mode = found->mode;
+ ret = 0;
+ }
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
+ return ret;
+}
+
+
+/**
+ * @brief Send a scan command for all available channels filtered on a spec
+ *
+ * Used in association code and from debugfs
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param ssid A pointer to the SSID to scan for
+ * @param ssid_len Length of the SSID
+ * @param clear_ssid Should existing scan results with this SSID
+ * be cleared?
+ *
+ * @return 0-success, otherwise fail
+ */
+int lbs_send_specific_ssid_scan(struct lbs_private *priv,
+ u8 *ssid, u8 ssid_len, u8 clear_ssid)
+{
+ struct lbs_ioctl_user_scan_cfg scancfg;
+ int ret = 0;
+
+ lbs_deb_enter_args(LBS_DEB_SCAN, "SSID '%s', clear %d",
+ escape_essid(ssid, ssid_len), clear_ssid);
+
+ if (!ssid_len)
+ goto out;
+
+ memset(&scancfg, 0x00, sizeof(scancfg));
+ memcpy(scancfg.ssid, ssid, ssid_len);
+ scancfg.ssid_len = ssid_len;
+ scancfg.clear_ssid = clear_ssid;
+
+ lbs_scan_networks(priv, &scancfg, 1);
+ if (priv->surpriseremoved) {
+ ret = -1;
+ goto out;
+ }
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
+ return ret;
+}
+
+
+
+
+/*********************************************************************/
+/* */
+/* Support for Wireless Extensions */
+/* */
+/*********************************************************************/
+
+
+#define MAX_CUSTOM_LEN 64
+
+static inline char *lbs_translate_scan(struct lbs_private *priv,
+ char *start, char *stop,
+ struct bss_descriptor *bss)
+{
+ struct chan_freq_power *cfp;
+ char *current_val; /* For rates */
+ struct iw_event iwe; /* Temporary buffer */
+ int j;
+#define PERFECT_RSSI ((u8)50)
+#define WORST_RSSI ((u8)0)
+#define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
+ u8 rssi;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ cfp = lbs_find_cfp_by_band_and_channel(priv, 0, bss->channel);
+ if (!cfp) {
+ lbs_deb_scan("Invalid channel number %d\n", bss->channel);
+ start = NULL;
+ goto out;
+ }
+
+ /* First entry *MUST* be the BSSID */
+ iwe.cmd = SIOCGIWAP;
+ iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
+ memcpy(iwe.u.ap_addr.sa_data, &bss->bssid, ETH_ALEN);
+ start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN);
+
+ /* SSID */
+ iwe.cmd = SIOCGIWESSID;
+ iwe.u.data.flags = 1;
+ iwe.u.data.length = min((u32) bss->ssid_len, (u32) IW_ESSID_MAX_SIZE);
+ start = iwe_stream_add_point(start, stop, &iwe, bss->ssid);
+
+ /* Mode */
+ iwe.cmd = SIOCGIWMODE;
+ iwe.u.mode = bss->mode;
+ start = iwe_stream_add_event(start, stop, &iwe, IW_EV_UINT_LEN);
+
+ /* Frequency */
+ iwe.cmd = SIOCGIWFREQ;
+ iwe.u.freq.m = (long)cfp->freq * 100000;
+ iwe.u.freq.e = 1;
+ start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN);
+
+ /* Add quality statistics */
+ iwe.cmd = IWEVQUAL;
+ iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
+ iwe.u.qual.level = SCAN_RSSI(bss->rssi);
+
+ rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
+ iwe.u.qual.qual =
+ (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
+ (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
+ (RSSI_DIFF * RSSI_DIFF);
+ if (iwe.u.qual.qual > 100)
+ iwe.u.qual.qual = 100;
+
+ if (priv->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
+ iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
+ } else {
+ iwe.u.qual.noise =
+ CAL_NF(priv->NF[TYPE_BEACON][TYPE_NOAVG]);
+ }
+
+ /* Locally created ad-hoc BSSs won't have beacons if this is the
+ * only station in the adhoc network; so get signal strength
+ * from receive statistics.
+ */
+ if ((priv->mode == IW_MODE_ADHOC)
+ && priv->adhoccreate
+ && !lbs_ssid_cmp(priv->curbssparams.ssid,
+ priv->curbssparams.ssid_len,
+ bss->ssid, bss->ssid_len)) {
+ int snr, nf;
+ snr = priv->SNR[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
+ nf = priv->NF[TYPE_RXPD][TYPE_AVG] / AVG_SCALE;
+ iwe.u.qual.level = CAL_RSSI(snr, nf);
+ }
+ start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN);
+
+ /* Add encryption capability */
+ iwe.cmd = SIOCGIWENCODE;
+ if (bss->capability & WLAN_CAPABILITY_PRIVACY) {
+ iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
+ } else {
+ iwe.u.data.flags = IW_ENCODE_DISABLED;
+ }
+ iwe.u.data.length = 0;
+ start = iwe_stream_add_point(start, stop, &iwe, bss->ssid);
+
+ current_val = start + IW_EV_LCP_LEN;
+
+ iwe.cmd = SIOCGIWRATE;
+ iwe.u.bitrate.fixed = 0;
+ iwe.u.bitrate.disabled = 0;
+ iwe.u.bitrate.value = 0;
+
+ for (j = 0; bss->rates[j] && (j < sizeof(bss->rates)); j++) {
+ /* Bit rate given in 500 kb/s units */
+ iwe.u.bitrate.value = bss->rates[j] * 500000;
+ current_val = iwe_stream_add_value(start, current_val,
+ stop, &iwe, IW_EV_PARAM_LEN);
+ }
+ if ((bss->mode == IW_MODE_ADHOC)
+ && !lbs_ssid_cmp(priv->curbssparams.ssid,
+ priv->curbssparams.ssid_len,
+ bss->ssid, bss->ssid_len)
+ && priv->adhoccreate) {
+ iwe.u.bitrate.value = 22 * 500000;
+ current_val = iwe_stream_add_value(start, current_val,
+ stop, &iwe, IW_EV_PARAM_LEN);
+ }
+ /* Check if we added any event */
+ if((current_val - start) > IW_EV_LCP_LEN)
+ start = current_val;
+
+ memset(&iwe, 0, sizeof(iwe));
+ if (bss->wpa_ie_len) {
+ char buf[MAX_WPA_IE_LEN];
+ memcpy(buf, bss->wpa_ie, bss->wpa_ie_len);
+ iwe.cmd = IWEVGENIE;
+ iwe.u.data.length = bss->wpa_ie_len;
+ start = iwe_stream_add_point(start, stop, &iwe, buf);
+ }
+
+ memset(&iwe, 0, sizeof(iwe));
+ if (bss->rsn_ie_len) {
+ char buf[MAX_WPA_IE_LEN];
+ memcpy(buf, bss->rsn_ie, bss->rsn_ie_len);
+ iwe.cmd = IWEVGENIE;
+ iwe.u.data.length = bss->rsn_ie_len;
+ start = iwe_stream_add_point(start, stop, &iwe, buf);
+ }
+
+ if (bss->mesh) {
+ char custom[MAX_CUSTOM_LEN];
+ char *p = custom;
+
+ iwe.cmd = IWEVCUSTOM;
+ p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
+ "mesh-type: olpc");
+ iwe.u.data.length = p - custom;
+ if (iwe.u.data.length)
+ start = iwe_stream_add_point(start, stop, &iwe, custom);
+ }
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SCAN, "start %p", start);
+ return start;
+}
+
+
+/**
+ * @brief Handle Scan Network ioctl
+ *
+ * @param dev A pointer to net_device structure
+ * @param info A pointer to iw_request_info structure
+ * @param vwrq A pointer to iw_param structure
+ * @param extra A pointer to extra data buf
+ *
+ * @return 0 --success, otherwise fail
+ */
+int lbs_set_scan(struct net_device *dev, struct iw_request_info *info,
+ struct iw_param *wrqu, char *extra)
+{
+ struct lbs_private *priv = dev->priv;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ if (!netif_running(dev))
+ return -ENETDOWN;
+
+ /* mac80211 does this:
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+ if (sdata->type != IEEE80211_IF_TYPE_xxx)
+ return -EOPNOTSUPP;
+
+ if (wrqu->data.length == sizeof(struct iw_scan_req) &&
+ wrqu->data.flags & IW_SCAN_THIS_ESSID) {
+ req = (struct iw_scan_req *)extra;
+ ssid = req->essid;
+ ssid_len = req->essid_len;
+ }
+ */
+
+ if (!delayed_work_pending(&priv->scan_work))
+ queue_delayed_work(priv->work_thread, &priv->scan_work,
+ msecs_to_jiffies(50));
+ /* set marker that currently a scan is taking place */
+ priv->last_scanned_channel = -1;
+
+ if (priv->surpriseremoved)
+ return -EIO;
+
+ lbs_deb_leave(LBS_DEB_SCAN);
+ return 0;
+}
+
+
+/**
+ * @brief Handle Retrieve scan table ioctl
+ *
+ * @param dev A pointer to net_device structure
+ * @param info A pointer to iw_request_info structure
+ * @param dwrq A pointer to iw_point structure
+ * @param extra A pointer to extra data buf
+ *
+ * @return 0 --success, otherwise fail
+ */
+int lbs_get_scan(struct net_device *dev, struct iw_request_info *info,
+ struct iw_point *dwrq, char *extra)
+{
+#define SCAN_ITEM_SIZE 128
+ struct lbs_private *priv = dev->priv;
+ int err = 0;
+ char *ev = extra;
+ char *stop = ev + dwrq->length;
+ struct bss_descriptor * iter_bss;
+ struct bss_descriptor * safe;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ /* iwlist should wait until the current scan is finished */
+ if (priv->last_scanned_channel)
+ return -EAGAIN;
+
+ /* Update RSSI if current BSS is a locally created ad-hoc BSS */
+ if ((priv->mode == IW_MODE_ADHOC) && priv->adhoccreate) {
+ lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
+ CMD_OPTION_WAITFORRSP, 0, NULL);
+ }
+
+ mutex_lock(&priv->lock);
+ list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) {
+ char * next_ev;
+ unsigned long stale_time;
+
+ if (stop - ev < SCAN_ITEM_SIZE) {
+ err = -E2BIG;
+ break;
+ }
+
+ /* For mesh device, list only mesh networks */
+ if (dev == priv->mesh_dev && !iter_bss->mesh)
+ continue;
+
+ /* Prune old an old scan result */
+ stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
+ if (time_after(jiffies, stale_time)) {
+ list_move_tail (&iter_bss->list,
+ &priv->network_free_list);
+ clear_bss_descriptor(iter_bss);
+ continue;
+ }
+
+ /* Translate to WE format this entry */
+ next_ev = lbs_translate_scan(priv, ev, stop, iter_bss);
+ if (next_ev == NULL)
+ continue;
+ ev = next_ev;
+ }
+ mutex_unlock(&priv->lock);
+
+ dwrq->length = (ev - extra);
+ dwrq->flags = 0;
+
+ lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", err);
+ return err;
+}
+
+
+
+
+/*********************************************************************/
+/* */
+/* Command execution */
+/* */
+/*********************************************************************/
+
+
+/**
+ * @brief Prepare a scan command to be sent to the firmware
+ *
+ * Called via lbs_prepare_and_send_command(priv, CMD_802_11_SCAN, ...)
+ * from cmd.c
+ *
+ * Sends a fixed lenght data part (specifying the BSS type and BSSID filters)
+ * as well as a variable number/length of TLVs to the firmware.
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param cmd A pointer to cmd_ds_command structure to be sent to
+ * firmware with the cmd_DS_801_11_SCAN structure
+ * @param pdata_buf Void pointer cast of a lbs_scan_cmd_config struct used
+ * to set the fields/TLVs for the command sent to firmware
+ *
+ * @return 0 or -1
+ */
+int lbs_cmd_80211_scan(struct lbs_private *priv,
+ struct cmd_ds_command *cmd, void *pdata_buf)
+{
+ struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
+ struct lbs_scan_cmd_config *pscancfg = pdata_buf;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ /* Set fixed field variables in scan command */
+ pscan->bsstype = pscancfg->bsstype;
+ memcpy(pscan->bssid, pscancfg->bssid, ETH_ALEN);
+ memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
+
+ /* size is equal to the sizeof(fixed portions) + the TLV len + header */
+ cmd->size = cpu_to_le16(sizeof(pscan->bsstype) + ETH_ALEN
+ + pscancfg->tlvbufferlen + S_DS_GEN);
+
+ lbs_deb_leave(LBS_DEB_SCAN);
+ return 0;
+}
+
+/**
+ * @brief This function handles the command response of scan
+ *
+ * Called from handle_cmd_response() in cmdrespc.
+ *
+ * The response buffer for the scan command has the following
+ * memory layout:
+ *
+ * .-----------------------------------------------------------.
+ * | header (4 * sizeof(u16)): Standard command response hdr |
+ * .-----------------------------------------------------------.
+ * | bufsize (u16) : sizeof the BSS Description data |
+ * .-----------------------------------------------------------.
+ * | NumOfSet (u8) : Number of BSS Descs returned |
+ * .-----------------------------------------------------------.
+ * | BSSDescription data (variable, size given in bufsize) |
+ * .-----------------------------------------------------------.
+ * | TLV data (variable, size calculated using header->size, |
+ * | bufsize and sizeof the fixed fields above) |
+ * .-----------------------------------------------------------.
+ *
+ * @param priv A pointer to struct lbs_private structure
+ * @param resp A pointer to cmd_ds_command
+ *
+ * @return 0 or -1
+ */
+int lbs_ret_80211_scan(struct lbs_private *priv, struct cmd_ds_command *resp)
+{
+ struct cmd_ds_802_11_scan_rsp *pscan;
+ struct bss_descriptor * iter_bss;
+ struct bss_descriptor * safe;
+ u8 *pbssinfo;
+ u16 scanrespsize;
+ int bytesleft;
+ int idx;
+ int tlvbufsize;
+ int ret;
+
+ lbs_deb_enter(LBS_DEB_SCAN);
+
+ /* Prune old entries from scan table */
+ list_for_each_entry_safe (iter_bss, safe, &priv->network_list, list) {
+ unsigned long stale_time = iter_bss->last_scanned + DEFAULT_MAX_SCAN_AGE;
+ if (time_before(jiffies, stale_time))
+ continue;
+ list_move_tail (&iter_bss->list, &priv->network_free_list);
+ clear_bss_descriptor(iter_bss);
+ }
+
+ pscan = &resp->params.scanresp;
+
+ if (pscan->nr_sets > MAX_NETWORK_COUNT) {
+ lbs_deb_scan(
+ "SCAN_RESP: too many scan results (%d, max %d)!!\n",
+ pscan->nr_sets, MAX_NETWORK_COUNT);
+ ret = -1;
+ goto done;
+ }
+
+ bytesleft = le16_to_cpu(pscan->bssdescriptsize);
+ lbs_deb_scan("SCAN_RESP: bssdescriptsize %d\n", bytesleft);
+
+ scanrespsize = le16_to_cpu(resp->size);
+ lbs_deb_scan("SCAN_RESP: scan results %d\n", pscan->nr_sets);
+
+ pbssinfo = pscan->bssdesc_and_tlvbuffer;
+
+ /* The size of the TLV buffer is equal to the entire command response
+ * size (scanrespsize) minus the fixed fields (sizeof()'s), the
+ * BSS Descriptions (bssdescriptsize as bytesLef) and the command
+ * response header (S_DS_GEN)
+ */
+ tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
+ + sizeof(pscan->nr_sets)
+ + S_DS_GEN);
+
+ /*
+ * Process each scan response returned (pscan->nr_sets). Save
+ * the information in the newbssentry and then insert into the
+ * driver scan table either as an update to an existing entry
+ * or as an addition at the end of the table
+ */
+ for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
+ struct bss_descriptor new;
+ struct bss_descriptor * found = NULL;
+ struct bss_descriptor * oldest = NULL;
+ DECLARE_MAC_BUF(mac);
+
+ /* Process the data fields and IEs returned for this BSS */
+ memset(&new, 0, sizeof (struct bss_descriptor));
+ if (lbs_process_bss(&new, &pbssinfo, &bytesleft) != 0) {
+ /* error parsing the scan response, skipped */
+ lbs_deb_scan("SCAN_RESP: process_bss returned ERROR\n");
+ continue;
+ }
+
+ /* Try to find this bss in the scan table */
+ list_for_each_entry (iter_bss, &priv->network_list, list) {
+ if (is_same_network(iter_bss, &new)) {
+ found = iter_bss;
+ break;
+ }
+
+ if ((oldest == NULL) ||
+ (iter_bss->last_scanned < oldest->last_scanned))
+ oldest = iter_bss;
+ }
+
+ if (found) {
+ /* found, clear it */
+ clear_bss_descriptor(found);
+ } else if (!list_empty(&priv->network_free_list)) {
+ /* Pull one from the free list */
+ found = list_entry(priv->network_free_list.next,
+ struct bss_descriptor, list);
+ list_move_tail(&found->list, &priv->network_list);
+ } else if (oldest) {
+ /* If there are no more slots, expire the oldest */
+ found = oldest;
+ clear_bss_descriptor(found);
+ list_move_tail(&found->list, &priv->network_list);
+ } else {
+ continue;
+ }
+
+ lbs_deb_scan("SCAN_RESP: BSSID %s\n",
+ print_mac(mac, new.bssid));
+
+ /* Copy the locally created newbssentry to the scan table */
+ memcpy(found, &new, offsetof(struct bss_descriptor, list));
+ }
+
+ ret = 0;
+
+done:
+ lbs_deb_leave_args(LBS_DEB_SCAN, "ret %d", ret);
+ return ret;
+}
projects / openwrt / openwrt.git / blobdiff