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path: root/drivers/net/wireless/libertas/scan.c
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Diffstat (limited to 'drivers/net/wireless/libertas/scan.c')
-rw-r--r--drivers/net/wireless/libertas/scan.c2044
1 files changed, 2044 insertions, 0 deletions
diff --git a/drivers/net/wireless/libertas/scan.c b/drivers/net/wireless/libertas/scan.c
new file mode 100644
index 000000000000..e18706238951
--- /dev/null
+++ b/drivers/net/wireless/libertas/scan.c
@@ -0,0 +1,2044 @@
+/* -*- mode: C; tab-width: 4; indent-tabs-mode: nil -*- */
+/* vi: set expandtab shiftwidth=4 tabstop=4 textwidth=78: */
+
+/**
+ * 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 <net/ieee80211.h>
+#include <net/iw_handler.h>
+
+#include "host.h"
+#include "decl.h"
+#include "dev.h"
+#include "scan.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 wlan_scan_cmd_config with all TLVs at max
+#define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config) \
+ + sizeof(struct mrvlietypes_numprobes) \
+ + 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
+
+//! Macro to enable/disable SSID checking before storing a scan table
+#ifdef DISCARD_BAD_SSID
+#define CHECK_SSID_IS_VALID(x) ssid_valid(&bssidEntry.ssid)
+#else
+#define CHECK_SSID_IS_VALID(x) 1
+#endif
+
+/**
+ * @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 adapter A pointer to wlan_adapter
+ * @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(wlan_adapter * adapter, int index, int mode)
+{
+ ENTER();
+
+ if (adapter->scantable[index].inframode == mode) {
+ if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
+ && !adapter->secinfo.WPAenabled
+ && !adapter->secinfo.WPA2enabled
+ && adapter->scantable[index].wpa_supplicant.wpa_ie[0] !=
+ WPA_IE
+ && adapter->scantable[index].wpa2_supplicant.wpa_ie[0] !=
+ WPA2_IE && adapter->secinfo.Encryptionmode == CIPHER_NONE
+ && !adapter->scantable[index].privacy) {
+ /* no security */
+ LEAVE();
+ return index;
+ } else if (adapter->secinfo.WEPstatus == wlan802_11WEPenabled
+ && !adapter->secinfo.WPAenabled
+ && !adapter->secinfo.WPA2enabled
+ && adapter->scantable[index].privacy) {
+ /* static WEP enabled */
+ LEAVE();
+ return index;
+ } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
+ && adapter->secinfo.WPAenabled
+ && !adapter->secinfo.WPA2enabled
+ && (adapter->scantable[index].wpa_supplicant.
+ wpa_ie[0]
+ == WPA_IE)
+ /* privacy bit may NOT be set in some APs like LinkSys WRT54G
+ && adapter->scantable[index].privacy */
+ ) {
+ /* WPA enabled */
+ lbs_pr_debug(1,
+ "is_network_compatible() WPA: index=%d wpa_ie=%#x "
+ "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
+ "privacy=%#x\n", index,
+ adapter->scantable[index].wpa_supplicant.
+ wpa_ie[0],
+ adapter->scantable[index].wpa2_supplicant.
+ wpa_ie[0],
+ (adapter->secinfo.WEPstatus ==
+ wlan802_11WEPenabled) ? "e" : "d",
+ (adapter->secinfo.WPAenabled) ? "e" : "d",
+ (adapter->secinfo.WPA2enabled) ? "e" : "d",
+ adapter->secinfo.Encryptionmode,
+ adapter->scantable[index].privacy);
+ LEAVE();
+ return index;
+ } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
+ && !adapter->secinfo.WPAenabled
+ && adapter->secinfo.WPA2enabled
+ && (adapter->scantable[index].wpa2_supplicant.
+ wpa_ie[0]
+ == WPA2_IE)
+ /* privacy bit may NOT be set in some APs like LinkSys WRT54G
+ && adapter->scantable[index].privacy */
+ ) {
+ /* WPA2 enabled */
+ lbs_pr_debug(1,
+ "is_network_compatible() WPA2: index=%d wpa_ie=%#x "
+ "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
+ "privacy=%#x\n", index,
+ adapter->scantable[index].wpa_supplicant.
+ wpa_ie[0],
+ adapter->scantable[index].wpa2_supplicant.
+ wpa_ie[0],
+ (adapter->secinfo.WEPstatus ==
+ wlan802_11WEPenabled) ? "e" : "d",
+ (adapter->secinfo.WPAenabled) ? "e" : "d",
+ (adapter->secinfo.WPA2enabled) ? "e" : "d",
+ adapter->secinfo.Encryptionmode,
+ adapter->scantable[index].privacy);
+ LEAVE();
+ return index;
+ } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
+ && !adapter->secinfo.WPAenabled
+ && !adapter->secinfo.WPA2enabled
+ && (adapter->scantable[index].wpa_supplicant.
+ wpa_ie[0]
+ != WPA_IE)
+ && (adapter->scantable[index].wpa2_supplicant.
+ wpa_ie[0]
+ != WPA2_IE)
+ && adapter->secinfo.Encryptionmode != CIPHER_NONE
+ && adapter->scantable[index].privacy) {
+ /* dynamic WEP enabled */
+ lbs_pr_debug(1,
+ "is_network_compatible() dynamic WEP: index=%d "
+ "wpa_ie=%#x wpa2_ie=%#x Encmode=%#x privacy=%#x\n",
+ index,
+ adapter->scantable[index].wpa_supplicant.
+ wpa_ie[0],
+ adapter->scantable[index].wpa2_supplicant.
+ wpa_ie[0], adapter->secinfo.Encryptionmode,
+ adapter->scantable[index].privacy);
+ LEAVE();
+ return index;
+ }
+
+ /* security doesn't match */
+ lbs_pr_debug(1,
+ "is_network_compatible() FAILED: index=%d wpa_ie=%#x "
+ "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x privacy=%#x\n",
+ index,
+ adapter->scantable[index].wpa_supplicant.wpa_ie[0],
+ adapter->scantable[index].wpa2_supplicant.wpa_ie[0],
+ (adapter->secinfo.WEPstatus ==
+ wlan802_11WEPenabled) ? "e" : "d",
+ (adapter->secinfo.WPAenabled) ? "e" : "d",
+ (adapter->secinfo.WPA2enabled) ? "e" : "d",
+ adapter->secinfo.Encryptionmode,
+ adapter->scantable[index].privacy);
+ LEAVE();
+ return -ECONNREFUSED;
+ }
+
+ /* mode doesn't match */
+ LEAVE();
+ return -ENETUNREACH;
+}
+
+/**
+ * @brief This function validates a SSID as being able to be printed
+ *
+ * @param pssid SSID structure to validate
+ *
+ * @return TRUE or FALSE
+ */
+static u8 ssid_valid(struct WLAN_802_11_SSID *pssid)
+{
+ int ssididx;
+
+ for (ssididx = 0; ssididx < pssid->ssidlength; ssididx++) {
+ if (!isprint(pssid->ssid[ssididx])) {
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+/**
+ * @brief Post process the scan table after a new scan command has completed
+ *
+ * Inspect each entry of the scan table and try to find an entry that
+ * matches our current associated/joined network from the scan. If
+ * one is found, update the stored copy of the bssdescriptor for our
+ * current network.
+ *
+ * Debug dump the current scan table contents if compiled accordingly.
+ *
+ * @param priv A pointer to wlan_private structure
+ *
+ * @return void
+ */
+static void wlan_scan_process_results(wlan_private * priv)
+{
+ wlan_adapter *adapter = priv->adapter;
+ int foundcurrent;
+ int i;
+
+ foundcurrent = 0;
+
+ if (adapter->connect_status == libertas_connected) {
+ /* try to find the current BSSID in the new scan list */
+ for (i = 0; i < adapter->numinscantable; i++) {
+ if (!libertas_SSID_cmp(&adapter->scantable[i].ssid,
+ &adapter->curbssparams.ssid) &&
+ !memcmp(adapter->curbssparams.bssid,
+ adapter->scantable[i].macaddress,
+ ETH_ALEN)) {
+ foundcurrent = 1;
+ }
+ }
+
+ if (foundcurrent) {
+ /* Make a copy of current BSSID descriptor */
+ memcpy(&adapter->curbssparams.bssdescriptor,
+ &adapter->scantable[i],
+ sizeof(adapter->curbssparams.bssdescriptor));
+ }
+ }
+
+ for (i = 0; i < adapter->numinscantable; i++) {
+ lbs_pr_debug(1, "Scan:(%02d) %02x:%02x:%02x:%02x:%02x:%02x, "
+ "RSSI[%03d], SSID[%s]\n",
+ i,
+ adapter->scantable[i].macaddress[0],
+ adapter->scantable[i].macaddress[1],
+ adapter->scantable[i].macaddress[2],
+ adapter->scantable[i].macaddress[3],
+ adapter->scantable[i].macaddress[4],
+ adapter->scantable[i].macaddress[5],
+ (s32) adapter->scantable[i].rssi,
+ adapter->scantable[i].ssid.ssid);
+ }
+}
+
+/**
+ * @brief Create a channel list for the driver to scan based on region info
+ *
+ * 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 wlan_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 void wlan_scan_create_channel_list(wlan_private * priv,
+ struct chanscanparamset * scanchanlist,
+ u8 filteredscan)
+{
+
+ wlan_adapter *adapter = priv->adapter;
+ 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 = adapter->scantype;
+
+ for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
+ if (priv->adapter->enable11d &&
+ adapter->connect_status != libertas_connected) {
+ /* Scan all the supported chan for the first scan */
+ if (!adapter->universal_channel[rgnidx].valid)
+ continue;
+ scanregion = &adapter->universal_channel[rgnidx];
+
+ /* clear the parsed_region_chan for the first scan */
+ memset(&adapter->parsed_region_chan, 0x00,
+ sizeof(adapter->parsed_region_chan));
+ } else {
+ if (!adapter->region_channel[rgnidx].valid)
+ continue;
+ scanregion = &adapter->region_channel[rgnidx];
+ }
+
+ for (nextchan = 0;
+ nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
+
+ cfp = scanregion->CFP + nextchan;
+
+ if (priv->adapter->enable11d) {
+ scantype =
+ libertas_get_scan_type_11d(cfp->channel,
+ &adapter->
+ 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;
+ }
+ }
+ }
+}
+
+/**
+ * @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
+ *
+ * Application layer or other functions can invoke wlan_scan_networks
+ * with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
+ * This structure is used as the basis of one or many wlan_scan_cmd_config
+ * commands that are sent to the command processing module and sent to
+ * firmware.
+ *
+ * Create a wlan_scan_cmd_config based on the following user supplied
+ * parameters (if present):
+ * - SSID filter
+ * - BSSID filter
+ * - Number of Probes to be sent
+ * - channel list
+ *
+ * If the SSID or BSSID filter is not present, disable/clear the filter.
+ * If the number of probes is not set, use the adapter default setting
+ * Qualify the channel
+ *
+ * @param priv A pointer to wlan_private structure
+ * @param puserscanin NULL or pointer to scan configuration parameters
+ * @param ppchantlvout Output parameter: Pointer to the start of the
+ * channel TLV portion of the output scan config
+ * @param pscanchanlist Output parameter: Pointer to the resulting channel
+ * list to scan
+ * @param pmaxchanperscan Output parameter: Number of channels to scan for
+ * each issuance of the firmware scan command
+ * @param pfilteredscan Output parameter: 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.
+ * @param pscancurrentonly Output parameter: Flag indicating whether or not
+ * we are only scanning our current active channel
+ *
+ * @return resulting scan configuration
+ */
+static struct wlan_scan_cmd_config *
+wlan_scan_setup_scan_config(wlan_private * priv,
+ const struct wlan_ioctl_user_scan_cfg * puserscanin,
+ struct mrvlietypes_chanlistparamset ** ppchantlvout,
+ struct chanscanparamset * pscanchanlist,
+ int *pmaxchanperscan,
+ u8 * pfilteredscan,
+ u8 * pscancurrentonly)
+{
+ wlan_adapter *adapter = priv->adapter;
+ const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
+ struct mrvlietypes_numprobes *pnumprobestlv;
+ struct mrvlietypes_ssidparamset *pssidtlv;
+ struct wlan_scan_cmd_config * pscancfgout = NULL;
+ u8 *ptlvpos;
+ u16 numprobes;
+ u16 ssidlen;
+ int chanidx;
+ int scantype;
+ int scandur;
+ int channel;
+ int radiotype;
+
+ pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
+ if (pscancfgout == NULL)
+ goto out;
+
+ /* The tlvbufferlen is calculated for each scan command. The TLVs added
+ * in this routine will be preserved since the routine that sends
+ * the command will append channelTLVs at *ppchantlvout. The difference
+ * between the *ppchantlvout and the tlvbuffer start will be used
+ * to calculate the size of anything we add in this routine.
+ */
+ pscancfgout->tlvbufferlen = 0;
+
+ /* Running tlv pointer. Assigned to ppchantlvout at end of function
+ * so later routines know where channels can be added to the command buf
+ */
+ ptlvpos = pscancfgout->tlvbuffer;
+
+ /*
+ * Set the initial scan paramters for progressive scanning. If a specific
+ * BSSID or SSID is used, the number of channels in the scan command
+ * will be increased to the absolute maximum
+ */
+ *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
+
+ /* Initialize the scan as un-filtered by firmware, set to TRUE below if
+ * a SSID or BSSID filter is sent in the command
+ */
+ *pfilteredscan = 0;
+
+ /* Initialize the scan as not being only on the current channel. If
+ * the channel list is customized, only contains one channel, and
+ * is the active channel, this is set true and data flow is not halted.
+ */
+ *pscancurrentonly = 0;
+
+ if (puserscanin) {
+
+ /* Set the bss type scan filter, use adapter setting if unset */
+ pscancfgout->bsstype =
+ (puserscanin->bsstype ? puserscanin->bsstype : adapter->
+ scanmode);
+
+ /* Set the number of probes to send, use adapter setting if unset */
+ numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
+ adapter->scanprobes);
+
+ /*
+ * Set the BSSID filter to the incoming configuration,
+ * if non-zero. If not set, it will remain disabled (all zeros).
+ */
+ memcpy(pscancfgout->specificBSSID,
+ puserscanin->specificBSSID,
+ sizeof(pscancfgout->specificBSSID));
+
+ ssidlen = strlen(puserscanin->specificSSID);
+
+ if (ssidlen) {
+ pssidtlv =
+ (struct mrvlietypes_ssidparamset *) pscancfgout->
+ tlvbuffer;
+ pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
+ pssidtlv->header.len = cpu_to_le16(ssidlen);
+ memcpy(pssidtlv->ssid, puserscanin->specificSSID,
+ ssidlen);
+ ptlvpos += sizeof(pssidtlv->header) + ssidlen;
+ }
+
+ /*
+ * The default number of channels sent in the command is low to
+ * ensure the response buffer from the firmware does not truncate
+ * scan results. That is not an issue with an SSID or BSSID
+ * filter applied to the scan results in the firmware.
+ */
+ if (ssidlen || (memcmp(pscancfgout->specificBSSID,
+ &zeromac, sizeof(zeromac)) != 0)) {
+ *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
+ *pfilteredscan = 1;
+ }
+ } else {
+ pscancfgout->bsstype = adapter->scanmode;
+ numprobes = adapter->scanprobes;
+ }
+
+ /* If the input config or adapter has the number of Probes set, add tlv */
+ if (numprobes) {
+ pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
+ pnumprobestlv->header.type =
+ cpu_to_le16(TLV_TYPE_NUMPROBES);
+ pnumprobestlv->header.len = sizeof(pnumprobestlv->numprobes);
+ pnumprobestlv->numprobes = cpu_to_le16(numprobes);
+
+ ptlvpos +=
+ sizeof(pnumprobestlv->header) + pnumprobestlv->header.len;
+
+ pnumprobestlv->header.len =
+ cpu_to_le16(pnumprobestlv->header.len);
+ }
+
+ /*
+ * Set the output for the channel TLV to the address in the tlv buffer
+ * past any TLVs that were added in this fuction (SSID, numprobes).
+ * channel TLVs will be added past this for each scan command, preserving
+ * the TLVs that were previously added.
+ */
+ *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
+
+ if (puserscanin && puserscanin->chanlist[0].channumber) {
+
+ lbs_pr_debug(1, "Scan: Using supplied channel list\n");
+
+ for (chanidx = 0;
+ chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
+ && puserscanin->chanlist[chanidx].channumber; chanidx++) {
+
+ channel = puserscanin->chanlist[chanidx].channumber;
+ (pscanchanlist + chanidx)->channumber = channel;
+
+ radiotype = puserscanin->chanlist[chanidx].radiotype;
+ (pscanchanlist + chanidx)->radiotype = radiotype;
+
+ scantype = puserscanin->chanlist[chanidx].scantype;
+
+ if (scantype == cmd_scan_type_passive) {
+ (pscanchanlist +
+ chanidx)->chanscanmode.passivescan = 1;
+ } else {
+ (pscanchanlist +
+ chanidx)->chanscanmode.passivescan = 0;
+ }
+
+ if (puserscanin->chanlist[chanidx].scantime) {
+ scandur =
+ puserscanin->chanlist[chanidx].scantime;
+ } else {
+ if (scantype == cmd_scan_type_passive) {
+ scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
+ } else {
+ scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
+ }
+ }
+
+ (pscanchanlist + chanidx)->minscantime =
+ cpu_to_le16(scandur);
+ (pscanchanlist + chanidx)->maxscantime =
+ cpu_to_le16(scandur);
+ }
+
+ /* Check if we are only scanning the current channel */
+ if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
+ ==
+ priv->adapter->curbssparams.channel)) {
+ *pscancurrentonly = 1;
+ lbs_pr_debug(1, "Scan: Scanning current channel only");
+ }
+
+ } else {
+ lbs_pr_debug(1, "Scan: Creating full region channel list\n");
+ wlan_scan_create_channel_list(priv, pscanchanlist,
+ *pfilteredscan);
+ }
+
+out:
+ return pscancfgout;
+}
+
+/**
+ * @brief Construct and send multiple scan config commands to the firmware
+ *
+ * Previous routines have created a wlan_scan_cmd_config with any requested
+ * TLVs. This function splits the channel TLV into maxchanperscan lists
+ * and sends the portion of the channel TLV along with the other TLVs
+ * to the wlan_cmd routines for execution in the firmware.
+ *
+ * @param priv A pointer to wlan_private structure
+ * @param maxchanperscan Maximum number channels to be included in each
+ * scan command sent to firmware
+ * @param filteredscan Flag indicating whether or not a BSSID or SSID
+ * filter is being used for the firmware command
+ * scan command sent to firmware
+ * @param pscancfgout Scan configuration used for this scan.
+ * @param pchantlvout Pointer in the pscancfgout where the channel TLV
+ * should start. This is past any other TLVs that
+ * must be sent down in each firmware command.
+ * @param pscanchanlist List of channels to scan in maxchanperscan segments
+ *
+ * @return 0 or error return otherwise
+ */
+static int wlan_scan_channel_list(wlan_private * priv,
+ int maxchanperscan,
+ u8 filteredscan,
+ struct wlan_scan_cmd_config * pscancfgout,
+ struct mrvlietypes_chanlistparamset * pchantlvout,
+ struct chanscanparamset * pscanchanlist)
+{
+ struct chanscanparamset *ptmpchan;
+ struct chanscanparamset *pstartchan;
+ u8 scanband;
+ int doneearly;
+ int tlvidx;
+ int ret = 0;
+
+ ENTER();
+
+ if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
+ lbs_pr_debug(1, "Scan: Null detect: %p, %p, %p\n",
+ pscancfgout, pchantlvout, pscanchanlist);
+ return -1;
+ }
+
+ pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
+
+ /* Set the temp channel struct pointer to the start of the desired list */
+ ptmpchan = pscanchanlist;
+
+ /* Loop through the desired channel list, sending a new firmware scan
+ * commands for each maxchanperscan channels (or for 1,6,11 individually
+ * if configured accordingly)
+ */
+ while (ptmpchan->channumber) {
+
+ tlvidx = 0;
+ pchantlvout->header.len = 0;
+ scanband = ptmpchan->radiotype;
+ pstartchan = ptmpchan;
+ doneearly = 0;
+
+ /* Construct the channel TLV for the scan command. Continue to
+ * insert channel TLVs until:
+ * - the tlvidx hits the maximum configured per scan command
+ * - the next channel to insert is 0 (end of desired channel list)
+ * - doneearly is set (controlling individual scanning of 1,6,11)
+ */
+ while (tlvidx < maxchanperscan && ptmpchan->channumber
+ && !doneearly) {
+
+ lbs_pr_debug(1,
+ "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
+ ptmpchan->channumber, ptmpchan->radiotype,
+ ptmpchan->chanscanmode.passivescan,
+ ptmpchan->chanscanmode.disablechanfilt,
+ ptmpchan->maxscantime);
+
+ /* Copy the current channel TLV to the command being prepared */
+ memcpy(pchantlvout->chanscanparam + tlvidx,
+ ptmpchan, sizeof(pchantlvout->chanscanparam));
+
+ /* Increment the TLV header length by the size appended */
+ pchantlvout->header.len +=
+ sizeof(pchantlvout->chanscanparam);
+
+ /*
+ * The tlv buffer length is set to the number of bytes of the
+ * between the channel tlv pointer and the start of the
+ * tlv buffer. This compensates for any TLVs that were appended
+ * before the channel list.
+ */
+ pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
+ - pscancfgout->tlvbuffer);
+
+ /* Add the size of the channel tlv header and the data length */
+ pscancfgout->tlvbufferlen +=
+ (sizeof(pchantlvout->header)
+ + pchantlvout->header.len);
+
+ /* Increment the index to the channel tlv we are constructing */
+ tlvidx++;
+
+ doneearly = 0;
+
+ /* Stop the loop if the *current* channel is in the 1,6,11 set
+ * and we are not filtering on a BSSID or SSID.
+ */
+ if (!filteredscan && (ptmpchan->channumber == 1
+ || ptmpchan->channumber == 6
+ || ptmpchan->channumber == 11)) {
+ doneearly = 1;
+ }
+
+ /* Increment the tmp pointer to the next channel to be scanned */
+ ptmpchan++;
+
+ /* Stop the loop if the *next* channel is in the 1,6,11 set.
+ * This will cause it to be the only channel scanned on the next
+ * interation
+ */
+ if (!filteredscan && (ptmpchan->channumber == 1
+ || ptmpchan->channumber == 6
+ || ptmpchan->channumber == 11)) {
+ doneearly = 1;
+ }
+ }
+
+ /* Send the scan command to the firmware with the specified cfg */
+ ret = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
+ 0, 0, pscancfgout);
+ }
+
+ LEAVE();
+ return ret;
+}
+
+/**
+ * @brief Internal function used to start a scan based on an input config
+ *
+ * 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 wlan_private structure
+ * @param puserscanin Pointer to the input configuration for the requested
+ * scan.
+ *
+ * @return 0 or < 0 if error
+ */
+int wlan_scan_networks(wlan_private * priv,
+ const struct wlan_ioctl_user_scan_cfg * puserscanin)
+{
+ wlan_adapter *adapter = priv->adapter;
+ struct mrvlietypes_chanlistparamset *pchantlvout;
+ struct chanscanparamset * scan_chan_list = NULL;
+ struct wlan_scan_cmd_config * scan_cfg = NULL;
+ u8 keeppreviousscan;
+ u8 filteredscan;
+ u8 scancurrentchanonly;
+ int maxchanperscan;
+ int ret;
+
+ ENTER();
+
+ scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
+ WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
+ if (scan_chan_list == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ scan_cfg = wlan_scan_setup_scan_config(priv,
+ puserscanin,
+ &pchantlvout,
+ scan_chan_list,
+ &maxchanperscan,
+ &filteredscan,
+ &scancurrentchanonly);
+ if (scan_cfg == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ keeppreviousscan = 0;
+
+ if (puserscanin) {
+ keeppreviousscan = puserscanin->keeppreviousscan;
+ }
+
+ if (!keeppreviousscan) {
+ memset(adapter->scantable, 0x00,
+ sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST);
+ adapter->numinscantable = 0;
+ }
+
+ /* Keep the data path active if we are only scanning our current channel */
+ if (!scancurrentchanonly) {
+ netif_stop_queue(priv->wlan_dev.netdev);
+ netif_carrier_off(priv->wlan_dev.netdev);
+ }
+
+ ret = wlan_scan_channel_list(priv,
+ maxchanperscan,
+ filteredscan,
+ scan_cfg,
+ pchantlvout,
+ scan_chan_list);
+
+ /* Process the resulting scan table:
+ * - Remove any bad ssids
+ * - Update our current BSS information from scan data
+ */
+ wlan_scan_process_results(priv);
+
+ if (priv->adapter->connect_status == libertas_connected) {
+ netif_carrier_on(priv->wlan_dev.netdev);
+ netif_wake_queue(priv->wlan_dev.netdev);
+ }
+
+out:
+ if (scan_cfg)
+ kfree(scan_cfg);
+
+ if (scan_chan_list)
+ kfree(scan_chan_list);
+
+ LEAVE();
+ return ret;
+}
+
+/**
+ * @brief Inspect the scan response buffer for pointers to expected TLVs
+ *
+ * TLVs can be included at the end of the scan response BSS information.
+ * Parse the data in the buffer for pointers to TLVs that can potentially
+ * be passed back in the response
+ *
+ * @param ptlv Pointer to the start of the TLV buffer to parse
+ * @param tlvbufsize size of the TLV buffer
+ * @param ptsftlv Output parameter: Pointer to the TSF TLV if found
+ *
+ * @return void
+ */
+static
+void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
+ int tlvbufsize,
+ struct mrvlietypes_tsftimestamp ** ptsftlv)
+{
+ struct mrvlietypes_data *pcurrenttlv;
+ int tlvbufleft;
+ u16 tlvtype;
+ u16 tlvlen;
+
+ pcurrenttlv = ptlv;
+ tlvbufleft = tlvbufsize;
+ *ptsftlv = NULL;
+
+ lbs_pr_debug(1, "SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
+ lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
+
+ while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
+ tlvtype = le16_to_cpu(pcurrenttlv->header.type);
+ tlvlen = le16_to_cpu(pcurrenttlv->header.len);
+
+ switch (tlvtype) {
+ case TLV_TYPE_TSFTIMESTAMP:
+ *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
+ break;
+
+ default:
+ lbs_pr_debug(1, "SCAN_RESP: Unhandled TLV = %d\n",
+ tlvtype);
+ /* Give up, this seems corrupted */
+ return;
+ } /* switch */
+
+ tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
+ pcurrenttlv =
+ (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
+ } /* while */
+}
+
+/**
+ * @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 pBSSIDEntry Output parameter: Pointer to the BSS Entry
+ *
+ * @return 0 or -1
+ */
+static int InterpretBSSDescriptionWithIE(struct bss_descriptor * pBSSEntry,
+ u8 ** pbeaconinfo, int *bytesleft)
+{
+ enum ieeetypes_elementid elemID;
+ struct ieeetypes_fhparamset *pFH;
+ struct ieeetypes_dsparamset *pDS;
+ struct ieeetypes_cfparamset *pCF;
+ struct ieeetypes_ibssparamset *pibss;
+ struct ieeetypes_capinfo *pcap;
+ struct WLAN_802_11_FIXED_IEs fixedie;
+ u8 *pcurrentptr;
+ u8 *pRate;
+ u8 elemlen;
+ u8 bytestocopy;
+ u8 ratesize;
+ u16 beaconsize;
+ u8 founddatarateie;
+ int bytesleftforcurrentbeacon;
+
+ struct WPA_SUPPLICANT *pwpa_supplicant;
+ struct WPA_SUPPLICANT *pwpa2_supplicant;
+ struct IE_WPA *pIe;
+ const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
+
+ struct ieeetypes_countryinfoset *pcountryinfo;
+
+ ENTER();
+
+ founddatarateie = 0;
+ ratesize = 0;
+ beaconsize = 0;
+
+ if (*bytesleft >= sizeof(beaconsize)) {
+ /* Extract & convert beacon size from the command buffer */
+ memcpy(&beaconsize, *pbeaconinfo, sizeof(beaconsize));
+ beaconsize = le16_to_cpu(beaconsize);
+ *bytesleft -= sizeof(beaconsize);
+ *pbeaconinfo += sizeof(beaconsize);
+ }
+
+ if (beaconsize == 0 || beaconsize > *bytesleft) {
+
+ *pbeaconinfo += *bytesleft;
+ *bytesleft = 0;
+
+ return -1;
+ }
+
+ /* Initialize the current working beacon pointer for this BSS iteration */
+ pcurrentptr = *pbeaconinfo;
+
+ /* Advance the return beacon pointer past the current beacon */
+ *pbeaconinfo += beaconsize;
+ *bytesleft -= beaconsize;
+
+ bytesleftforcurrentbeacon = beaconsize;
+
+ pwpa_supplicant = &pBSSEntry->wpa_supplicant;
+ pwpa2_supplicant = &pBSSEntry->wpa2_supplicant;
+
+ memcpy(pBSSEntry->macaddress, pcurrentptr, ETH_ALEN);
+ lbs_pr_debug(1, "InterpretIE: AP MAC Addr-%x:%x:%x:%x:%x:%x\n",
+ pBSSEntry->macaddress[0], pBSSEntry->macaddress[1],
+ pBSSEntry->macaddress[2], pBSSEntry->macaddress[3],
+ pBSSEntry->macaddress[4], pBSSEntry->macaddress[5]);
+
+ pcurrentptr += ETH_ALEN;
+ bytesleftforcurrentbeacon -= ETH_ALEN;
+
+ if (bytesleftforcurrentbeacon < 12) {
+ lbs_pr_debug(1, "InterpretIE: Not enough bytes left\n");
+ return -1;
+ }
+
+ /*
+ * next 4 fields are RSSI, time stamp, beacon interval,
+ * and capability information
+ */
+
+ /* RSSI is 1 byte long */
+ pBSSEntry->rssi = le32_to_cpu((long)(*pcurrentptr));
+ lbs_pr_debug(1, "InterpretIE: RSSI=%02X\n", *pcurrentptr);
+ pcurrentptr += 1;
+ bytesleftforcurrentbeacon -= 1;
+
+ /* time stamp is 8 bytes long */
+ memcpy(fixedie.timestamp, pcurrentptr, 8);
+ memcpy(pBSSEntry->timestamp, pcurrentptr, 8);
+ pcurrentptr += 8;
+ bytesleftforcurrentbeacon -= 8;
+
+ /* beacon interval is 2 bytes long */
+ memcpy(&fixedie.beaconinterval, pcurrentptr, 2);
+ pBSSEntry->beaconperiod = le16_to_cpu(fixedie.beaconinterval);
+ pcurrentptr += 2;
+ bytesleftforcurrentbeacon -= 2;
+
+ /* capability information is 2 bytes long */
+ memcpy(&fixedie.capabilities, pcurrentptr, 2);
+ lbs_pr_debug(1, "InterpretIE: fixedie.capabilities=0x%X\n",
+ fixedie.capabilities);
+ fixedie.capabilities = le16_to_cpu(fixedie.capabilities);
+ pcap = (struct ieeetypes_capinfo *) & fixedie.capabilities;
+ memcpy(&pBSSEntry->cap, pcap, sizeof(struct ieeetypes_capinfo));
+ pcurrentptr += 2;
+ bytesleftforcurrentbeacon -= 2;
+
+ /* rest of the current buffer are IE's */
+ lbs_pr_debug(1, "InterpretIE: IElength for this AP = %d\n",
+ bytesleftforcurrentbeacon);
+
+ lbs_dbg_hex("InterpretIE: IE info", (u8 *) pcurrentptr,
+ bytesleftforcurrentbeacon);
+
+ if (pcap->privacy) {
+ lbs_pr_debug(1, "InterpretIE: AP WEP enabled\n");
+ pBSSEntry->privacy = wlan802_11privfilter8021xWEP;
+ } else {
+ pBSSEntry->privacy = wlan802_11privfilteracceptall;
+ }
+
+ if (pcap->ibss == 1) {
+ pBSSEntry->inframode = wlan802_11ibss;
+ } else {
+ pBSSEntry->inframode = wlan802_11infrastructure;
+ }
+
+ /* process variable IE */
+ while (bytesleftforcurrentbeacon >= 2) {
+ elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
+ elemlen = *((u8 *) pcurrentptr + 1);
+
+ if (bytesleftforcurrentbeacon < elemlen) {
+ lbs_pr_debug(1, "InterpretIE: error in processing IE, "
+ "bytes left < IE length\n");
+ bytesleftforcurrentbeacon = 0;
+ continue;
+ }
+
+ switch (elemID) {
+
+ case SSID:
+ pBSSEntry->ssid.ssidlength = elemlen;
+ memcpy(pBSSEntry->ssid.ssid, (pcurrentptr + 2),
+ elemlen);
+ lbs_pr_debug(1, "ssid: %32s", pBSSEntry->ssid.ssid);
+ break;
+
+ case SUPPORTED_RATES:
+ memcpy(pBSSEntry->datarates, (pcurrentptr + 2),
+ elemlen);
+ memmove(pBSSEntry->libertas_supported_rates, (pcurrentptr + 2),
+ elemlen);
+ ratesize = elemlen;
+ founddatarateie = 1;
+ break;
+
+ case EXTRA_IE:
+ lbs_pr_debug(1, "InterpretIE: EXTRA_IE Found!\n");
+ pBSSEntry->extra_ie = 1;
+ break;
+
+ case FH_PARAM_SET:
+ pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
+ memmove(&pBSSEntry->phyparamset.fhparamset, pFH,
+ sizeof(struct ieeetypes_fhparamset));
+ pBSSEntry->phyparamset.fhparamset.dwelltime
+ =
+ le16_to_cpu(pBSSEntry->phyparamset.fhparamset.
+ dwelltime);
+ break;
+
+ case DS_PARAM_SET:
+ pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
+
+ pBSSEntry->channel = pDS->currentchan;
+
+ memcpy(&pBSSEntry->phyparamset.dsparamset, pDS,
+ sizeof(struct ieeetypes_dsparamset));
+ break;
+
+ case CF_PARAM_SET:
+ pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
+
+ memcpy(&pBSSEntry->ssparamset.cfparamset, pCF,
+ sizeof(struct ieeetypes_cfparamset));
+ break;
+
+ case IBSS_PARAM_SET:
+ pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
+ pBSSEntry->atimwindow =
+ le32_to_cpu(pibss->atimwindow);
+
+ memmove(&pBSSEntry->ssparamset.ibssparamset, pibss,
+ sizeof(struct ieeetypes_ibssparamset));
+
+ pBSSEntry->ssparamset.ibssparamset.atimwindow
+ =
+ le16_to_cpu(pBSSEntry->ssparamset.ibssparamset.
+ atimwindow);
+ break;
+
+ /* Handle Country Info IE */
+ case COUNTRY_INFO:
+ pcountryinfo =
+ (struct ieeetypes_countryinfoset *) pcurrentptr;
+
+ if (pcountryinfo->len <
+ sizeof(pcountryinfo->countrycode)
+ || pcountryinfo->len > 254) {
+ lbs_pr_debug(1, "InterpretIE: 11D- Err "
+ "CountryInfo len =%d min=%d max=254\n",
+ pcountryinfo->len,
+ sizeof(pcountryinfo->countrycode));
+ LEAVE();
+ return -1;
+ }
+
+ memcpy(&pBSSEntry->countryinfo,
+ pcountryinfo, pcountryinfo->len + 2);
+ lbs_dbg_hex("InterpretIE: 11D- CountryInfo:",
+ (u8 *) pcountryinfo,
+ (u32) (pcountryinfo->len + 2));
+ break;
+
+ case EXTENDED_SUPPORTED_RATES:
+ /*
+ * only process extended supported rate
+ * if data rate is already found.
+ * data rate IE should come before
+ * extended supported rate IE
+ */
+ if (founddatarateie) {
+ if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
+ bytestocopy =
+ (WLAN_SUPPORTED_RATES - ratesize);
+ } else {
+ bytestocopy = elemlen;
+ }
+
+ pRate = (u8 *) pBSSEntry->datarates;
+ pRate += ratesize;
+ memmove(pRate, (pcurrentptr + 2), bytestocopy);
+
+ pRate = (u8 *) pBSSEntry->libertas_supported_rates;
+
+ pRate += ratesize;
+ memmove(pRate, (pcurrentptr + 2), bytestocopy);
+ }
+ break;
+
+ case VENDOR_SPECIFIC_221:
+#define IE_ID_LEN_FIELDS_BYTES 2
+ pIe = (struct IE_WPA *)pcurrentptr;
+
+ if (!memcmp(pIe->oui, oui01, sizeof(oui01))) {
+ pwpa_supplicant->wpa_ie_len
+ = min_t(size_t, elemlen + IE_ID_LEN_FIELDS_BYTES,
+ sizeof(pwpa_supplicant->wpa_ie));
+ memcpy(pwpa_supplicant->wpa_ie,
+ pcurrentptr,
+ pwpa_supplicant->wpa_ie_len);
+ lbs_dbg_hex("InterpretIE: Resp WPA_IE",
+ pwpa_supplicant->wpa_ie, elemlen);
+ }
+ break;
+ case WPA2_IE:
+ pIe = (struct IE_WPA *)pcurrentptr;
+ pwpa2_supplicant->wpa_ie_len
+ = min_t(size_t, elemlen + IE_ID_LEN_FIELDS_BYTES,
+ sizeof(pwpa2_supplicant->wpa_ie));
+ memcpy(pwpa2_supplicant->wpa_ie,
+ pcurrentptr, pwpa2_supplicant->wpa_ie_len);
+
+ lbs_dbg_hex("InterpretIE: Resp WPA2_IE",
+ pwpa2_supplicant->wpa_ie, elemlen);
+ break;
+ case TIM:
+ break;
+
+ case CHALLENGE_TEXT:
+ break;
+ }
+
+ pcurrentptr += elemlen + 2;
+
+ /* need to account for IE ID and IE len */
+ bytesleftforcurrentbeacon -= (elemlen + 2);
+
+ } /* while (bytesleftforcurrentbeacon > 2) */
+
+ return 0;
+}
+
+/**
+ * @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 libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1, struct WLAN_802_11_SSID *ssid2)
+{
+ if (!ssid1 || !ssid2)
+ return -1;
+
+ if (ssid1->ssidlength != ssid2->ssidlength)
+ return -1;
+
+ return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssidlength);
+}
+
+/**
+ * @brief This function finds a specific compatible BSSID in the scan list
+ *
+ * @param adapter A pointer to wlan_adapter
+ * @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)
+ */
+int libertas_find_BSSID_in_list(wlan_adapter * adapter, u8 * bssid, int mode)
+{
+ int ret = -ENETUNREACH;
+ int i;
+
+ if (!bssid)
+ return -EFAULT;
+
+ lbs_pr_debug(1, "FindBSSID: Num of BSSIDs = %d\n",
+ adapter->numinscantable);
+
+ /* Look through the scan table for a compatible match. The ret return
+ * variable will be equal to the index in the scan table (greater
+ * than zero) if the network is compatible. 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
+ */
+ for (i = 0; ret < 0 && i < adapter->numinscantable; i++) {
+ if (!memcmp(adapter->scantable[i].macaddress, bssid, ETH_ALEN)) {
+ switch (mode) {
+ case wlan802_11infrastructure:
+ case wlan802_11ibss:
+ ret = is_network_compatible(adapter, i, mode);
+ break;
+ default:
+ ret = i;
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
+
+/**
+ * @brief This function finds ssid in ssid list.
+ *
+ * @param adapter A pointer to wlan_adapter
+ * @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
+ */
+int libertas_find_SSID_in_list(wlan_adapter * adapter,
+ struct WLAN_802_11_SSID *ssid, u8 * bssid, int mode)
+{
+ int net = -ENETUNREACH;
+ u8 bestrssi = 0;
+ int i;
+ int j;
+
+ lbs_pr_debug(1, "Num of Entries in Table = %d\n", adapter->numinscantable);
+
+ for (i = 0; i < adapter->numinscantable; i++) {
+ if (!libertas_SSID_cmp(&adapter->scantable[i].ssid, ssid) &&
+ (!bssid ||
+ !memcmp(adapter->scantable[i].
+ macaddress, bssid, ETH_ALEN))) {
+ switch (mode) {
+ case wlan802_11infrastructure:
+ case wlan802_11ibss:
+ j = is_network_compatible(adapter, i, mode);
+
+ if (j >= 0) {
+ if (bssid) {
+ return i;
+ }
+
+ if (SCAN_RSSI
+ (adapter->scantable[i].rssi)
+ > bestrssi) {
+ bestrssi =
+ SCAN_RSSI(adapter->
+ scantable[i].
+ rssi);
+ net = i;
+ }
+ } else {
+ if (net == -ENETUNREACH) {
+ net = j;
+ }
+ }
+ break;
+ case wlan802_11autounknown:
+ default:
+ if (SCAN_RSSI(adapter->scantable[i].rssi)
+ > bestrssi) {
+ bestrssi =
+ SCAN_RSSI(adapter->scantable[i].
+ rssi);
+ net = i;
+ }
+ break;
+ }
+ }
+ }
+
+ return net;
+}
+
+/**
+ * @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 adapter A pointer to wlan_adapter
+ *
+ * @return index in BSSID list
+ */
+int libertas_find_best_SSID_in_list(wlan_adapter * adapter,
+ enum WLAN_802_11_NETWORK_INFRASTRUCTURE mode)
+{
+ int bestnet = -ENETUNREACH;
+ u8 bestrssi = 0;
+ int i;
+
+ ENTER();
+
+ lbs_pr_debug(1, "Num of BSSIDs = %d\n", adapter->numinscantable);
+
+ for (i = 0; i < adapter->numinscantable; i++) {
+ switch (mode) {
+ case wlan802_11infrastructure:
+ case wlan802_11ibss:
+ if (is_network_compatible(adapter, i, mode) >= 0) {
+ if (SCAN_RSSI(adapter->scantable[i].rssi) >
+ bestrssi) {
+ bestrssi =
+ SCAN_RSSI(adapter->scantable[i].
+ rssi);
+ bestnet = i;
+ }
+ }
+ break;
+ case wlan802_11autounknown:
+ default:
+ if (SCAN_RSSI(adapter->scantable[i].rssi) > bestrssi) {
+ bestrssi =
+ SCAN_RSSI(adapter->scantable[i].rssi);
+ bestnet = i;
+ }
+ break;
+ }
+ }
+
+ LEAVE();
+ return bestnet;
+}
+
+/**
+ * @brief Find the AP with specific ssid in the scan list
+ *
+ * @param priv A pointer to wlan_private structure
+ * @param pSSID A pointer to AP's ssid
+ *
+ * @return 0--success, otherwise--fail
+ */
+int libertas_find_best_network_SSID(wlan_private * priv,
+ struct WLAN_802_11_SSID *pSSID,
+ enum WLAN_802_11_NETWORK_INFRASTRUCTURE preferred_mode,
+ enum WLAN_802_11_NETWORK_INFRASTRUCTURE *out_mode)
+{
+ wlan_adapter *adapter = priv->adapter;
+ int ret = 0;
+ struct bss_descriptor *preqbssid;
+ int i;
+
+ ENTER();
+
+ memset(pSSID, 0, sizeof(struct WLAN_802_11_SSID));
+
+ wlan_scan_networks(priv, NULL);
+ if (adapter->surpriseremoved)
+ return -1;
+ wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
+
+ i = libertas_find_best_SSID_in_list(adapter, preferred_mode);
+ if (i < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ preqbssid = &adapter->scantable[i];
+ memcpy(pSSID, &preqbssid->ssid,
+ sizeof(struct WLAN_802_11_SSID));
+ *out_mode = preqbssid->inframode;
+
+ if (!pSSID->ssidlength) {
+ ret = -1;
+ }
+
+out:
+ LEAVE();
+ return ret;
+}
+
+/**
+ * @brief Scan Network
+ *
+ * @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 libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
+ struct iw_param *vwrq, char *extra)
+{
+ wlan_private *priv = dev->priv;
+ wlan_adapter *adapter = priv->adapter;
+ union iwreq_data wrqu;
+
+ ENTER();
+
+ if (!wlan_scan_networks(priv, NULL)) {
+ memset(&wrqu, 0, sizeof(union iwreq_data));
+ wireless_send_event(priv->wlan_dev.netdev, SIOCGIWSCAN, &wrqu,
+ NULL);
+ }
+
+ if (adapter->surpriseremoved)
+ return -1;
+
+ LEAVE();
+ return 0;
+}
+
+/**
+ * @brief Send a scan command for all available channels filtered on a spec
+ *
+ * @param priv A pointer to wlan_private structure
+ * @param prequestedssid A pointer to AP's ssid
+ * @param keeppreviousscan Flag used to save/clear scan table before scan
+ *
+ * @return 0-success, otherwise fail
+ */
+int libertas_send_specific_SSID_scan(wlan_private * priv,
+ struct WLAN_802_11_SSID *prequestedssid,
+ u8 keeppreviousscan)
+{
+ wlan_adapter *adapter = priv->adapter;
+ struct wlan_ioctl_user_scan_cfg scancfg;
+
+ ENTER();
+
+ if (prequestedssid == NULL) {
+ return -1;
+ }
+
+ memset(&scancfg, 0x00, sizeof(scancfg));
+
+ memcpy(scancfg.specificSSID, prequestedssid->ssid,
+ prequestedssid->ssidlength);
+ scancfg.keeppreviousscan = keeppreviousscan;
+
+ wlan_scan_networks(priv, &scancfg);
+ if (adapter->surpriseremoved)
+ return -1;
+ wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
+
+ LEAVE();
+ return 0;
+}
+
+/**
+ * @brief scan an AP with specific BSSID
+ *
+ * @param priv A pointer to wlan_private structure
+ * @param bssid A pointer to AP's bssid
+ * @param keeppreviousscan Flag used to save/clear scan table before scan
+ *
+ * @return 0-success, otherwise fail
+ */
+int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
+{
+ struct wlan_ioctl_user_scan_cfg scancfg;
+
+ ENTER();
+
+ if (bssid == NULL) {
+ return -1;
+ }
+
+ memset(&scancfg, 0x00, sizeof(scancfg));
+ memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
+ scancfg.keeppreviousscan = keeppreviousscan;
+
+ wlan_scan_networks(priv, &scancfg);
+ if (priv->adapter->surpriseremoved)
+ return -1;
+ wait_event_interruptible(priv->adapter->cmd_pending,
+ !priv->adapter->nr_cmd_pending);
+
+ LEAVE();
+ return 0;
+}
+
+/**
+ * @brief Retrieve the scan table entries via wireless tools IOCTL call
+ *
+ * @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 libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
+ struct iw_point *dwrq, char *extra)
+{
+ wlan_private *priv = dev->priv;
+ wlan_adapter *adapter = priv->adapter;
+ int ret = 0;
+ char *current_ev = extra;
+ char *end_buf = extra + IW_SCAN_MAX_DATA;
+ struct chan_freq_power *cfp;
+ struct bss_descriptor *pscantable;
+ char *current_val; /* For rates */
+ struct iw_event iwe; /* Temporary buffer */
+ int i;
+ int j;
+ int rate;
+#define PERFECT_RSSI ((u8)50)
+#define WORST_RSSI ((u8)0)
+#define RSSI_DIFF ((u8)(PERFECT_RSSI - WORST_RSSI))
+ u8 rssi;
+
+ u8 buf[16 + 256 * 2];
+ u8 *ptr;
+
+ ENTER();
+
+ /*
+ * if there's either commands in the queue or one being
+ * processed return -EAGAIN for iwlist to retry later.
+ */
+ if (adapter->nr_cmd_pending)
+ return -EAGAIN;
+
+ if (adapter->connect_status == libertas_connected)
+ lbs_pr_debug(1, "Current ssid: %32s\n",
+ adapter->curbssparams.ssid.ssid);
+
+ lbs_pr_debug(1, "Scan: Get: numinscantable = %d\n",
+ adapter->numinscantable);
+
+ /* The old API using SIOCGIWAPLIST had a hard limit of IW_MAX_AP.
+ * The new API using SIOCGIWSCAN is only limited by buffer size
+ * WE-14 -> WE-16 the buffer is limited to IW_SCAN_MAX_DATA bytes
+ * which is 4096.
+ */
+ for (i = 0; i < adapter->numinscantable; i++) {
+ if ((current_ev + MAX_SCAN_CELL_SIZE) >= end_buf) {
+ lbs_pr_debug(1, "i=%d break out: current_ev=%p end_buf=%p "
+ "MAX_SCAN_CELL_SIZE=%d\n",
+ i, current_ev, end_buf, MAX_SCAN_CELL_SIZE);
+ break;
+ }
+
+ pscantable = &adapter->scantable[i];
+
+ lbs_pr_debug(1, "i=%d ssid: %32s\n", i, pscantable->ssid.ssid);
+
+ cfp =
+ libertas_find_cfp_by_band_and_channel(adapter, 0,
+ pscantable->channel);
+ if (!cfp) {
+ lbs_pr_debug(1, "Invalid channel number %d\n",
+ pscantable->channel);
+ continue;
+ }
+
+ if (!ssid_valid(&adapter->scantable[i].ssid)) {
+ continue;
+ }
+
+ /* First entry *MUST* be the AP MAC address */
+ iwe.cmd = SIOCGIWAP;
+ iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
+ memcpy(iwe.u.ap_addr.sa_data,
+ &adapter->scantable[i].macaddress, ETH_ALEN);
+
+ iwe.len = IW_EV_ADDR_LEN;
+ current_ev =
+ iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
+
+ //Add the ESSID
+ iwe.u.data.length = adapter->scantable[i].ssid.ssidlength;
+
+ if (iwe.u.data.length > 32) {
+ iwe.u.data.length = 32;
+ }
+
+ iwe.cmd = SIOCGIWESSID;
+ iwe.u.data.flags = 1;
+ iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
+ current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
+ adapter->scantable[i].ssid.
+ ssid);
+
+ //Add mode
+ iwe.cmd = SIOCGIWMODE;
+ iwe.u.mode = adapter->scantable[i].inframode + 1;
+ iwe.len = IW_EV_UINT_LEN;
+ current_ev =
+ iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
+
+ //frequency
+ iwe.cmd = SIOCGIWFREQ;
+ iwe.u.freq.m = (long)cfp->freq * 100000;
+ iwe.u.freq.e = 1;
+ iwe.len = IW_EV_FREQ_LEN;
+ current_ev =
+ iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
+
+ /* Add quality statistics */
+ iwe.cmd = IWEVQUAL;
+ iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
+ iwe.u.qual.level = SCAN_RSSI(adapter->scantable[i].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;
+ else if (iwe.u.qual.qual < 1)
+ iwe.u.qual.qual = 0;
+
+ if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
+ iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
+ } else {
+ iwe.u.qual.noise =
+ CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
+ }
+ if ((adapter->inframode == wlan802_11ibss) &&
+ !libertas_SSID_cmp(&adapter->curbssparams.ssid,
+ &adapter->scantable[i].ssid)
+ && adapter->adhoccreate) {
+ ret = libertas_prepare_and_send_command(priv,
+ cmd_802_11_rssi,
+ 0,
+ cmd_option_waitforrsp,
+ 0, NULL);
+
+ if (!ret) {
+ iwe.u.qual.level =
+ CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] /
+ AVG_SCALE,
+ adapter->NF[TYPE_RXPD][TYPE_AVG] /
+ AVG_SCALE);
+ }
+ }
+ iwe.len = IW_EV_QUAL_LEN;
+ current_ev =
+ iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
+
+ /* Add encryption capability */
+ iwe.cmd = SIOCGIWENCODE;
+ if (adapter->scantable[i].privacy) {
+ iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
+ } else {
+ iwe.u.data.flags = IW_ENCODE_DISABLED;
+ }
+ iwe.u.data.length = 0;
+ iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
+ current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
+ adapter->scantable->ssid.
+ ssid);
+
+ current_val = current_ev + IW_EV_LCP_LEN;
+
+ iwe.cmd = SIOCGIWRATE;
+
+ iwe.u.bitrate.fixed = 0;
+ iwe.u.bitrate.disabled = 0;
+ iwe.u.bitrate.value = 0;
+
+ /* Bit rate given in 500 kb/s units (+ 0x80) */
+ for (j = 0; j < sizeof(adapter->scantable[i].libertas_supported_rates);
+ j++) {
+ if (adapter->scantable[i].libertas_supported_rates[j] == 0) {
+ break;
+ }
+ rate =
+ (adapter->scantable[i].libertas_supported_rates[j] & 0x7F) *
+ 500000;
+ if (rate > iwe.u.bitrate.value) {
+ iwe.u.bitrate.value = rate;
+ }
+
+ iwe.u.bitrate.value =
+ (adapter->scantable[i].libertas_supported_rates[j]
+ & 0x7f) * 500000;
+ iwe.len = IW_EV_PARAM_LEN;
+ current_ev =
+ iwe_stream_add_value(current_ev, current_val,
+ end_buf, &iwe, iwe.len);
+
+ }
+ if ((adapter->scantable[i].inframode == wlan802_11ibss)
+ && !libertas_SSID_cmp(&adapter->curbssparams.ssid,
+ &adapter->scantable[i].ssid)
+ && adapter->adhoccreate) {
+ iwe.u.bitrate.value = 22 * 500000;
+ }
+ iwe.len = IW_EV_PARAM_LEN;
+ current_ev =
+ iwe_stream_add_value(current_ev, current_val, end_buf, &iwe,
+ iwe.len);
+
+ /* Add new value to event */
+ current_val = current_ev + IW_EV_LCP_LEN;
+
+ if (adapter->scantable[i].wpa2_supplicant.wpa_ie[0] == WPA2_IE) {
+ memset(&iwe, 0, sizeof(iwe));
+ memset(buf, 0, sizeof(buf));
+ memcpy(buf, adapter->scantable[i].
+ wpa2_supplicant.wpa_ie,
+ adapter->scantable[i].wpa2_supplicant.
+ wpa_ie_len);
+ iwe.cmd = IWEVGENIE;
+ iwe.u.data.length = adapter->scantable[i].
+ wpa2_supplicant.wpa_ie_len;
+ iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
+ current_ev = iwe_stream_add_point(current_ev, end_buf,
+ &iwe, buf);
+ }
+ if (adapter->scantable[i].wpa_supplicant.wpa_ie[0] == WPA_IE) {
+ memset(&iwe, 0, sizeof(iwe));
+ memset(buf, 0, sizeof(buf));
+ memcpy(buf, adapter->scantable[i].
+ wpa_supplicant.wpa_ie,
+ adapter->scantable[i].wpa_supplicant.
+ wpa_ie_len);
+ iwe.cmd = IWEVGENIE;
+ iwe.u.data.length = adapter->scantable[i].
+ wpa_supplicant.wpa_ie_len;
+ iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
+ current_ev = iwe_stream_add_point(current_ev, end_buf,
+ &iwe, buf);
+ }
+
+
+ if (adapter->scantable[i].extra_ie != 0) {
+ memset(&iwe, 0, sizeof(iwe));
+ memset(buf, 0, sizeof(buf));
+ ptr = buf;
+ ptr += sprintf(ptr, "extra_ie");
+ iwe.u.data.length = strlen(buf);
+
+ lbs_pr_debug(1, "iwe.u.data.length %d\n",
+ iwe.u.data.length);
+ lbs_pr_debug(1, "BUF: %s \n", buf);
+
+ iwe.cmd = IWEVCUSTOM;
+ iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
+ current_ev =
+ iwe_stream_add_point(current_ev, end_buf, &iwe,
+ buf);
+ }
+
+ current_val = current_ev + IW_EV_LCP_LEN;
+
+ /*
+ * Check if we added any event
+ */
+ if ((current_val - current_ev) > IW_EV_LCP_LEN)
+ current_ev = current_val;
+ }
+
+ dwrq->length = (current_ev - extra);
+ dwrq->flags = 0;
+
+ LEAVE();
+ return 0;
+}
+
+/**
+ * @brief Prepare a scan command to be sent to the firmware
+ *
+ * Use the wlan_scan_cmd_config sent to the command processing module in
+ * the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
+ * struct to send to firmware.
+ *
+ * The fixed fields specifying the BSS type and BSSID filters as well as a
+ * variable number/length of TLVs are sent in the command to firmware.
+ *
+ * @param priv A pointer to wlan_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 wlan_scan_cmd_config struct used
+ * to set the fields/TLVs for the command sent to firmware
+ *
+ * @return 0 or -1
+ *
+ * @sa wlan_scan_create_channel_list
+ */
+int libertas_cmd_80211_scan(wlan_private * priv,
+ struct cmd_ds_command *cmd, void *pdata_buf)
+{
+ struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
+ struct wlan_scan_cmd_config *pscancfg;
+
+ ENTER();
+
+ pscancfg = pdata_buf;
+
+ /* Set fixed field variables in scan command */
+ pscan->bsstype = pscancfg->bsstype;
+ memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
+ memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
+
+ cmd->command = cpu_to_le16(cmd_802_11_scan);
+
+ /* size is equal to the sizeof(fixed portions) + the TLV len + header */
+ cmd->size = cpu_to_le16(sizeof(pscan->bsstype)
+ + sizeof(pscan->BSSID)
+ + pscancfg->tlvbufferlen + S_DS_GEN);
+
+ lbs_pr_debug(1, "SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
+ cmd->command, cmd->size, cmd->seqnum);
+ LEAVE();
+ return 0;
+}
+
+/**
+ * @brief This function handles the command response of scan
+ *
+ * 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 wlan_private structure
+ * @param resp A pointer to cmd_ds_command
+ *
+ * @return 0 or -1
+ */
+int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
+{
+ wlan_adapter *adapter = priv->adapter;
+ struct cmd_ds_802_11_scan_rsp *pscan;
+ struct bss_descriptor newbssentry;
+ struct mrvlietypes_data *ptlv;
+ struct mrvlietypes_tsftimestamp *ptsftlv;
+ u8 *pbssinfo;
+ u16 scanrespsize;
+ int bytesleft;
+ int numintable;
+ int bssIdx;
+ int idx;
+ int tlvbufsize;
+ u64 tsfval;
+
+ ENTER();
+
+ pscan = &resp->params.scanresp;
+
+ if (pscan->nr_sets > MRVDRV_MAX_BSSID_LIST) {
+ lbs_pr_debug(1,
+ "SCAN_RESP: Invalid number of AP returned (%d)!!\n",
+ pscan->nr_sets);
+ LEAVE();
+ return -1;
+ }
+
+ bytesleft = le16_to_cpu(pscan->bssdescriptsize);
+ lbs_pr_debug(1, "SCAN_RESP: bssdescriptsize %d\n", bytesleft);
+
+ scanrespsize = le16_to_cpu(resp->size);
+ lbs_pr_debug(1, "SCAN_RESP: returned %d AP before parsing\n",
+ pscan->nr_sets);
+
+ numintable = adapter->numinscantable;
+ 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);
+
+ ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
+
+ /* Search the TLV buffer space in the scan response for any valid TLVs */
+ wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
+
+ /*
+ * 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++) {
+ /* Zero out the newbssentry we are about to store info in */
+ memset(&newbssentry, 0x00, sizeof(newbssentry));
+
+ /* Process the data fields and IEs returned for this BSS */
+ if ((InterpretBSSDescriptionWithIE(&newbssentry,
+ &pbssinfo,
+ &bytesleft) ==
+ 0)
+ && CHECK_SSID_IS_VALID(&newbssentry.ssid)) {
+
+ lbs_pr_debug(1,
+ "SCAN_RESP: BSSID = %02x:%02x:%02x:%02x:%02x:%02x\n",
+ newbssentry.macaddress[0],
+ newbssentry.macaddress[1],
+ newbssentry.macaddress[2],
+ newbssentry.macaddress[3],
+ newbssentry.macaddress[4],
+ newbssentry.macaddress[5]);
+
+ /*
+ * Search the scan table for the same bssid
+ */
+ for (bssIdx = 0; bssIdx < numintable; bssIdx++) {
+ if (memcmp(newbssentry.macaddress,
+ adapter->scantable[bssIdx].
+ macaddress,
+ sizeof(newbssentry.macaddress)) ==
+ 0) {
+ /*
+ * If the SSID matches as well, it is a duplicate of
+ * this entry. Keep the bssIdx set to this
+ * entry so we replace the old contents in the table
+ */
+ if ((newbssentry.ssid.ssidlength ==
+ adapter->scantable[bssIdx].ssid.
+ ssidlength)
+ &&
+ (memcmp
+ (newbssentry.ssid.ssid,
+ adapter->scantable[bssIdx].ssid.
+ ssid,
+ newbssentry.ssid.ssidlength) ==
+ 0)) {
+ lbs_pr_debug(1,
+ "SCAN_RESP: Duplicate of index: %d\n",
+ bssIdx);
+ break;
+ }
+ }
+ }
+ /*
+ * If the bssIdx is equal to the number of entries in the table,
+ * the new entry was not a duplicate; append it to the scan
+ * table
+ */
+ if (bssIdx == numintable) {
+ /* Range check the bssIdx, keep it limited to the last entry */
+ if (bssIdx == MRVDRV_MAX_BSSID_LIST) {
+ bssIdx--;
+ } else {
+ numintable++;
+ }
+ }
+
+ /*
+ * If the TSF TLV was appended to the scan results, save the
+ * this entries TSF value in the networktsf field. The
+ * networktsf is the firmware's TSF value at the time the
+ * beacon or probe response was received.
+ */
+ if (ptsftlv) {
+ memcpy(&tsfval, &ptsftlv->tsftable[idx],
+ sizeof(tsfval));
+ tsfval = le64_to_cpu(tsfval);
+
+ memcpy(&newbssentry.networktsf,
+ &tsfval, sizeof(newbssentry.networktsf));
+ }
+
+ /* Copy the locally created newbssentry to the scan table */
+ memcpy(&adapter->scantable[bssIdx],
+ &newbssentry,
+ sizeof(adapter->scantable[bssIdx]));
+
+ } else {
+
+ /* error parsing/interpreting the scan response, skipped */
+ lbs_pr_debug(1, "SCAN_RESP: "
+ "InterpretBSSDescriptionWithIE returned ERROR\n");
+ }
+ }
+
+ lbs_pr_debug(1, "SCAN_RESP: Scanned %2d APs, %d valid, %d total\n",
+ pscan->nr_sets, numintable - adapter->numinscantable,
+ numintable);
+
+ /* Update the total number of BSSIDs in the scan table */
+ adapter->numinscantable = numintable;
+
+ LEAVE();
+ return 0;
+}