err.no Git - linux-2.6/blob - drivers/net/wireless/libertas/scan.c

   1 /**
   2   * Functions implementing wlan scan IOCTL and firmware command APIs
   3   *
   4   * IOCTL handlers as well as command preperation and response routines
   5   *  for sending scan commands to the firmware.
   6   */
   7 #include <linux/ctype.h>
   8 #include <linux/if.h>
   9 #include <linux/netdevice.h>
  10 #include <linux/wireless.h>
  11
  12 #include <net/ieee80211.h>
  13 #include <net/iw_handler.h>
  14
  15 #include "host.h"
  16 #include "decl.h"
  17 #include "dev.h"
  18 #include "scan.h"
  19
  20 //! Approximate amount of data needed to pass a scan result back to iwlist
  21 #define MAX_SCAN_CELL_SIZE  (IW_EV_ADDR_LEN             \
  22                              + IW_ESSID_MAX_SIZE        \
  23                              + IW_EV_UINT_LEN           \
  24                              + IW_EV_FREQ_LEN           \
  25                              + IW_EV_QUAL_LEN           \
  26                              + IW_ESSID_MAX_SIZE        \
  27                              + IW_EV_PARAM_LEN          \
  28                              + 40)      /* 40 for WPAIE */
  29
  30 //! Memory needed to store a max sized channel List TLV for a firmware scan
  31 #define CHAN_TLV_MAX_SIZE  (sizeof(struct mrvlietypesheader)    \
  32                             + (MRVDRV_MAX_CHANNELS_PER_SCAN     \
  33                                * sizeof(struct chanscanparamset)))
  34
  35 //! Memory needed to store a max number/size SSID TLV for a firmware scan
  36 #define SSID_TLV_MAX_SIZE  (1 * sizeof(struct mrvlietypes_ssidparamset))
  37
  38 //! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
  39 #define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config)  \
  40                             + sizeof(struct mrvlietypes_numprobes)   \
  41                             + CHAN_TLV_MAX_SIZE                 \
  42                             + SSID_TLV_MAX_SIZE)
  43
  44 //! The maximum number of channels the firmware can scan per command
  45 #define MRVDRV_MAX_CHANNELS_PER_SCAN   14
  46
  47 /**
  48  * @brief Number of channels to scan per firmware scan command issuance.
  49  *
  50  *  Number restricted to prevent hitting the limit on the amount of scan data
  51  *  returned in a single firmware scan command.
  52  */
  53 #define MRVDRV_CHANNELS_PER_SCAN_CMD   4
  54
  55 //! Scan time specified in the channel TLV for each channel for passive scans
  56 #define MRVDRV_PASSIVE_SCAN_CHAN_TIME  100
  57
  58 //! Scan time specified in the channel TLV for each channel for active scans
  59 #define MRVDRV_ACTIVE_SCAN_CHAN_TIME   100
  60
  61 //! Macro to enable/disable SSID checking before storing a scan table
  62 #ifdef DISCARD_BAD_SSID
  63 #define CHECK_SSID_IS_VALID(x) ssid_valid(&bssidEntry.ssid)
  64 #else
  65 #define CHECK_SSID_IS_VALID(x) 1
  66 #endif
  67
  68 /**
  69  *  @brief Check if a scanned network compatible with the driver settings
  70  *
  71  *   WEP     WPA     WPA2    ad-hoc  encrypt                      Network
  72  * enabled enabled  enabled   AES     mode   privacy  WPA  WPA2  Compatible
  73  *    0       0        0       0      NONE      0      0    0   yes No security
  74  *    1       0        0       0      NONE      1      0    0   yes Static WEP
  75  *    0       1        0       0       x        1x     1    x   yes WPA
  76  *    0       0        1       0       x        1x     x    1   yes WPA2
  77  *    0       0        0       1      NONE      1      0    0   yes Ad-hoc AES
  78  *    0       0        0       0     !=NONE     1      0    0   yes Dynamic WEP
  79  *
  80  *
  81  *  @param adapter A pointer to wlan_adapter
  82  *  @param index   Index in scantable to check against current driver settings
  83  *  @param mode    Network mode: Infrastructure or IBSS
  84  *
  85  *  @return        Index in scantable, or error code if negative
  86  */
  87 static int is_network_compatible(wlan_adapter * adapter, int index, u8 mode)
  88 {
  89         ENTER();
  90
  91         if (adapter->scantable[index].mode == mode) {
  92                 if (   !adapter->secinfo.wep_enabled
  93                     && !adapter->secinfo.WPAenabled
  94                     && !adapter->secinfo.WPA2enabled
  95                     && adapter->scantable[index].wpa_ie[0] != WPA_IE
  96                     && adapter->scantable[index].rsn_ie[0] != WPA2_IE
  97                     && !adapter->scantable[index].privacy) {
  98                         /* no security */
  99                         LEAVE();
 100                         return index;
 101                 } else if (   adapter->secinfo.wep_enabled
 102                            && !adapter->secinfo.WPAenabled
 103                            && !adapter->secinfo.WPA2enabled
 104                            && adapter->scantable[index].privacy) {
 105                         /* static WEP enabled */
 106                         LEAVE();
 107                         return index;
 108                 } else if (   !adapter->secinfo.wep_enabled
 109                            && adapter->secinfo.WPAenabled
 110                            && !adapter->secinfo.WPA2enabled
 111                            && (adapter->scantable[index].wpa_ie[0] == WPA_IE)
 112                            /* privacy bit may NOT be set in some APs like LinkSys WRT54G
 113                               && adapter->scantable[index].privacy */
 114                     ) {
 115                         /* WPA enabled */
 116                         lbs_pr_debug(1,
 117                                "is_network_compatible() WPA: index=%d wpa_ie=%#x "
 118                                "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 119                                "privacy=%#x\n", index,
 120                                adapter->scantable[index].wpa_ie[0],
 121                                adapter->scantable[index].rsn_ie[0],
 122                                adapter->secinfo.wep_enabled ? "e" : "d",
 123                                adapter->secinfo.WPAenabled ? "e" : "d",
 124                                adapter->secinfo.WPA2enabled ? "e" : "d",
 125                                adapter->scantable[index].privacy);
 126                         LEAVE();
 127                         return index;
 128                 } else if (   !adapter->secinfo.wep_enabled
 129                            && !adapter->secinfo.WPAenabled
 130                            && adapter->secinfo.WPA2enabled
 131                            && (adapter->scantable[index].rsn_ie[0] == WPA2_IE)
 132                            /* privacy bit may NOT be set in some APs like LinkSys WRT54G
 133                               && adapter->scantable[index].privacy */
 134                     ) {
 135                         /* WPA2 enabled */
 136                         lbs_pr_debug(1,
 137                                "is_network_compatible() WPA2: index=%d wpa_ie=%#x "
 138                                "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
 139                                "privacy=%#x\n", index,
 140                                adapter->scantable[index].wpa_ie[0],
 141                                adapter->scantable[index].rsn_ie[0],
 142                                adapter->secinfo.wep_enabled ? "e" : "d",
 143                                adapter->secinfo.WPAenabled ? "e" : "d",
 144                                adapter->secinfo.WPA2enabled ? "e" : "d",
 145                                adapter->scantable[index].privacy);
 146                         LEAVE();
 147                         return index;
 148                 } else if (   !adapter->secinfo.wep_enabled
 149                            && !adapter->secinfo.WPAenabled
 150                            && !adapter->secinfo.WPA2enabled
 151                            && (adapter->scantable[index].wpa_ie[0] != WPA_IE)
 152                            && (adapter->scantable[index].rsn_ie[0] != WPA2_IE)
 153                            && adapter->scantable[index].privacy) {
 154                         /* dynamic WEP enabled */
 155                         lbs_pr_debug(1,
 156                                "is_network_compatible() dynamic WEP: index=%d "
 157                                "wpa_ie=%#x wpa2_ie=%#x privacy=%#x\n",
 158                                index,
 159                                adapter->scantable[index].wpa_ie[0],
 160                                adapter->scantable[index].rsn_ie[0],
 161                                adapter->scantable[index].privacy);
 162                         LEAVE();
 163                         return index;
 164                 }
 165
 166                 /* security doesn't match */
 167                 lbs_pr_debug(1,
 168                        "is_network_compatible() FAILED: index=%d wpa_ie=%#x "
 169                        "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s privacy=%#x\n",
 170                        index,
 171                        adapter->scantable[index].wpa_ie[0],
 172                        adapter->scantable[index].rsn_ie[0],
 173                        adapter->secinfo.wep_enabled ? "e" : "d",
 174                        adapter->secinfo.WPAenabled ? "e" : "d",
 175                        adapter->secinfo.WPA2enabled ? "e" : "d",
 176                        adapter->scantable[index].privacy);
 177                 LEAVE();
 178                 return -ECONNREFUSED;
 179         }
 180
 181         /* mode doesn't match */
 182         LEAVE();
 183         return -ENETUNREACH;
 184 }
 185
 186 /**
 187  *  @brief This function validates a SSID as being able to be printed
 188  *
 189  *  @param pssid   SSID structure to validate
 190  *
 191  *  @return        TRUE or FALSE
 192  */
 193 static u8 ssid_valid(struct WLAN_802_11_SSID *pssid)
 194 {
 195         int ssididx;
 196
 197         for (ssididx = 0; ssididx < pssid->ssidlength; ssididx++) {
 198                 if (!isprint(pssid->ssid[ssididx])) {
 199                         return 0;
 200                 }
 201         }
 202
 203         return 1;
 204 }
 205
 206 /**
 207  *  @brief Post process the scan table after a new scan command has completed
 208  *
 209  *  Inspect each entry of the scan table and try to find an entry that
 210  *    matches our current associated/joined network from the scan.  If
 211  *    one is found, update the stored copy of the bssdescriptor for our
 212  *    current network.
 213  *
 214  *  Debug dump the current scan table contents if compiled accordingly.
 215  *
 216  *  @param priv   A pointer to wlan_private structure
 217  *
 218  *  @return       void
 219  */
 220 static void wlan_scan_process_results(wlan_private * priv)
 221 {
 222         wlan_adapter *adapter = priv->adapter;
 223         int foundcurrent;
 224         int i;
 225
 226         foundcurrent = 0;
 227
 228         if (adapter->connect_status == libertas_connected) {
 229                 /* try to find the current BSSID in the new scan list */
 230                 for (i = 0; i < adapter->numinscantable; i++) {
 231                         if (!libertas_SSID_cmp(&adapter->scantable[i].ssid,
 232                                      &adapter->curbssparams.ssid) &&
 233                             !memcmp(adapter->curbssparams.bssid,
 234                                     adapter->scantable[i].macaddress,
 235                                     ETH_ALEN)) {
 236                                 foundcurrent = 1;
 237                         }
 238                 }
 239
 240                 if (foundcurrent) {
 241                         /* Make a copy of current BSSID descriptor */
 242                         memcpy(&adapter->curbssparams.bssdescriptor,
 243                                &adapter->scantable[i],
 244                                sizeof(adapter->curbssparams.bssdescriptor));
 245                 }
 246         }
 247
 248         for (i = 0; i < adapter->numinscantable; i++) {
 249                 lbs_pr_debug(1, "Scan:(%02d) %02x:%02x:%02x:%02x:%02x:%02x, "
 250                        "RSSI[%03d], SSID[%s]\n",
 251                        i,
 252                        adapter->scantable[i].macaddress[0],
 253                        adapter->scantable[i].macaddress[1],
 254                        adapter->scantable[i].macaddress[2],
 255                        adapter->scantable[i].macaddress[3],
 256                        adapter->scantable[i].macaddress[4],
 257                        adapter->scantable[i].macaddress[5],
 258                        (s32) adapter->scantable[i].rssi,
 259                        adapter->scantable[i].ssid.ssid);
 260         }
 261 }
 262
 263 /**
 264  *  @brief Create a channel list for the driver to scan based on region info
 265  *
 266  *  Use the driver region/band information to construct a comprehensive list
 267  *    of channels to scan.  This routine is used for any scan that is not
 268  *    provided a specific channel list to scan.
 269  *
 270  *  @param priv          A pointer to wlan_private structure
 271  *  @param scanchanlist  Output parameter: resulting channel list to scan
 272  *  @param filteredscan  Flag indicating whether or not a BSSID or SSID filter
 273  *                       is being sent in the command to firmware.  Used to
 274  *                       increase the number of channels sent in a scan
 275  *                       command and to disable the firmware channel scan
 276  *                       filter.
 277  *
 278  *  @return              void
 279  */
 280 static void wlan_scan_create_channel_list(wlan_private * priv,
 281                                           struct chanscanparamset * scanchanlist,
 282                                           u8 filteredscan)
 283 {
 284
 285         wlan_adapter *adapter = priv->adapter;
 286         struct region_channel *scanregion;
 287         struct chan_freq_power *cfp;
 288         int rgnidx;
 289         int chanidx;
 290         int nextchan;
 291         u8 scantype;
 292
 293         chanidx = 0;
 294
 295         /* Set the default scan type to the user specified type, will later
 296          *   be changed to passive on a per channel basis if restricted by
 297          *   regulatory requirements (11d or 11h)
 298          */
 299         scantype = adapter->scantype;
 300
 301         for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
 302                 if (priv->adapter->enable11d &&
 303                     adapter->connect_status != libertas_connected) {
 304                         /* Scan all the supported chan for the first scan */
 305                         if (!adapter->universal_channel[rgnidx].valid)
 306                                 continue;
 307                         scanregion = &adapter->universal_channel[rgnidx];
 308
 309                         /* clear the parsed_region_chan for the first scan */
 310                         memset(&adapter->parsed_region_chan, 0x00,
 311                                sizeof(adapter->parsed_region_chan));
 312                 } else {
 313                         if (!adapter->region_channel[rgnidx].valid)
 314                                 continue;
 315                         scanregion = &adapter->region_channel[rgnidx];
 316                 }
 317
 318                 for (nextchan = 0;
 319                      nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
 320
 321                         cfp = scanregion->CFP + nextchan;
 322
 323                         if (priv->adapter->enable11d) {
 324                                 scantype =
 325                                     libertas_get_scan_type_11d(cfp->channel,
 326                                                            &adapter->
 327                                                            parsed_region_chan);
 328                         }
 329
 330                         switch (scanregion->band) {
 331                         case BAND_B:
 332                         case BAND_G:
 333                         default:
 334                                 scanchanlist[chanidx].radiotype =
 335                                     cmd_scan_radio_type_bg;
 336                                 break;
 337                         }
 338
 339                         if (scantype == cmd_scan_type_passive) {
 340                                 scanchanlist[chanidx].maxscantime =
 341                                     cpu_to_le16
 342                                     (MRVDRV_PASSIVE_SCAN_CHAN_TIME);
 343                                 scanchanlist[chanidx].chanscanmode.passivescan =
 344                                     1;
 345                         } else {
 346                                 scanchanlist[chanidx].maxscantime =
 347                                     cpu_to_le16
 348                                     (MRVDRV_ACTIVE_SCAN_CHAN_TIME);
 349                                 scanchanlist[chanidx].chanscanmode.passivescan =
 350                                     0;
 351                         }
 352
 353                         scanchanlist[chanidx].channumber = cfp->channel;
 354
 355                         if (filteredscan) {
 356                                 scanchanlist[chanidx].chanscanmode.
 357                                     disablechanfilt = 1;
 358                         }
 359                 }
 360         }
 361 }
 362
 363 /**
 364  *  @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
 365  *
 366  *  Application layer or other functions can invoke wlan_scan_networks
 367  *    with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
 368  *    This structure is used as the basis of one or many wlan_scan_cmd_config
 369  *    commands that are sent to the command processing module and sent to
 370  *    firmware.
 371  *
 372  *  Create a wlan_scan_cmd_config based on the following user supplied
 373  *    parameters (if present):
 374  *             - SSID filter
 375  *             - BSSID filter
 376  *             - Number of Probes to be sent
 377  *             - channel list
 378  *
 379  *  If the SSID or BSSID filter is not present, disable/clear the filter.
 380  *  If the number of probes is not set, use the adapter default setting
 381  *  Qualify the channel
 382  *
 383  *  @param priv             A pointer to wlan_private structure
 384  *  @param puserscanin      NULL or pointer to scan configuration parameters
 385  *  @param ppchantlvout     Output parameter: Pointer to the start of the
 386  *                          channel TLV portion of the output scan config
 387  *  @param pscanchanlist    Output parameter: Pointer to the resulting channel
 388  *                          list to scan
 389  *  @param pmaxchanperscan  Output parameter: Number of channels to scan for
 390  *                          each issuance of the firmware scan command
 391  *  @param pfilteredscan    Output parameter: Flag indicating whether or not
 392  *                          a BSSID or SSID filter is being sent in the
 393  *                          command to firmware.  Used to increase the number
 394  *                          of channels sent in a scan command and to
 395  *                          disable the firmware channel scan filter.
 396  *  @param pscancurrentonly Output parameter: Flag indicating whether or not
 397  *                          we are only scanning our current active channel
 398  *
 399  *  @return                 resulting scan configuration
 400  */
 401 static struct wlan_scan_cmd_config *
 402 wlan_scan_setup_scan_config(wlan_private * priv,
 403                             const struct wlan_ioctl_user_scan_cfg * puserscanin,
 404                             struct mrvlietypes_chanlistparamset ** ppchantlvout,
 405                             struct chanscanparamset * pscanchanlist,
 406                             int *pmaxchanperscan,
 407                             u8 * pfilteredscan,
 408                             u8 * pscancurrentonly)
 409 {
 410         wlan_adapter *adapter = priv->adapter;
 411         const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
 412         struct mrvlietypes_numprobes *pnumprobestlv;
 413         struct mrvlietypes_ssidparamset *pssidtlv;
 414         struct wlan_scan_cmd_config * pscancfgout = NULL;
 415         u8 *ptlvpos;
 416         u16 numprobes;
 417         u16 ssidlen;
 418         int chanidx;
 419         int scantype;
 420         int scandur;
 421         int channel;
 422         int radiotype;
 423
 424         pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
 425         if (pscancfgout == NULL)
 426                 goto out;
 427
 428         /* The tlvbufferlen is calculated for each scan command.  The TLVs added
 429          *   in this routine will be preserved since the routine that sends
 430          *   the command will append channelTLVs at *ppchantlvout.  The difference
 431          *   between the *ppchantlvout and the tlvbuffer start will be used
 432          *   to calculate the size of anything we add in this routine.
 433          */
 434         pscancfgout->tlvbufferlen = 0;
 435
 436         /* Running tlv pointer.  Assigned to ppchantlvout at end of function
 437          *  so later routines know where channels can be added to the command buf
 438          */
 439         ptlvpos = pscancfgout->tlvbuffer;
 440
 441         /*
 442          * Set the initial scan paramters for progressive scanning.  If a specific
 443          *   BSSID or SSID is used, the number of channels in the scan command
 444          *   will be increased to the absolute maximum
 445          */
 446         *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
 447
 448         /* Initialize the scan as un-filtered by firmware, set to TRUE below if
 449          *   a SSID or BSSID filter is sent in the command
 450          */
 451         *pfilteredscan = 0;
 452
 453         /* Initialize the scan as not being only on the current channel.  If
 454          *   the channel list is customized, only contains one channel, and
 455          *   is the active channel, this is set true and data flow is not halted.
 456          */
 457         *pscancurrentonly = 0;
 458
 459         if (puserscanin) {
 460
 461                 /* Set the bss type scan filter, use adapter setting if unset */
 462                 pscancfgout->bsstype =
 463                     (puserscanin->bsstype ? puserscanin->bsstype : adapter->
 464                      scanmode);
 465
 466                 /* Set the number of probes to send, use adapter setting if unset */
 467                 numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
 468                              adapter->scanprobes);
 469
 470                 /*
 471                  * Set the BSSID filter to the incoming configuration,
 472                  *   if non-zero.  If not set, it will remain disabled (all zeros).
 473                  */
 474                 memcpy(pscancfgout->specificBSSID,
 475                        puserscanin->specificBSSID,
 476                        sizeof(pscancfgout->specificBSSID));
 477
 478                 ssidlen = strlen(puserscanin->specificSSID);
 479
 480                 if (ssidlen) {
 481                         pssidtlv =
 482                             (struct mrvlietypes_ssidparamset *) pscancfgout->
 483                             tlvbuffer;
 484                         pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
 485                         pssidtlv->header.len = cpu_to_le16(ssidlen);
 486                         memcpy(pssidtlv->ssid, puserscanin->specificSSID,
 487                                ssidlen);
 488                         ptlvpos += sizeof(pssidtlv->header) + ssidlen;
 489                 }
 490
 491                 /*
 492                  *  The default number of channels sent in the command is low to
 493                  *    ensure the response buffer from the firmware does not truncate
 494                  *    scan results.  That is not an issue with an SSID or BSSID
 495                  *    filter applied to the scan results in the firmware.
 496                  */
 497                 if (ssidlen || (memcmp(pscancfgout->specificBSSID,
 498                                        &zeromac, sizeof(zeromac)) != 0)) {
 499                         *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
 500                         *pfilteredscan = 1;
 501                 }
 502         } else {
 503                 pscancfgout->bsstype = adapter->scanmode;
 504                 numprobes = adapter->scanprobes;
 505         }
 506
 507         /* If the input config or adapter has the number of Probes set, add tlv */
 508         if (numprobes) {
 509                 pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
 510                 pnumprobestlv->header.type =
 511                     cpu_to_le16(TLV_TYPE_NUMPROBES);
 512                 pnumprobestlv->header.len = sizeof(pnumprobestlv->numprobes);
 513                 pnumprobestlv->numprobes = cpu_to_le16(numprobes);
 514
 515                 ptlvpos +=
 516                     sizeof(pnumprobestlv->header) + pnumprobestlv->header.len;
 517
 518                 pnumprobestlv->header.len =
 519                     cpu_to_le16(pnumprobestlv->header.len);
 520         }
 521
 522         /*
 523          * Set the output for the channel TLV to the address in the tlv buffer
 524          *   past any TLVs that were added in this fuction (SSID, numprobes).
 525          *   channel TLVs will be added past this for each scan command, preserving
 526          *   the TLVs that were previously added.
 527          */
 528         *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
 529
 530         if (puserscanin && puserscanin->chanlist[0].channumber) {
 531
 532                 lbs_pr_debug(1, "Scan: Using supplied channel list\n");
 533
 534                 for (chanidx = 0;
 535                      chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
 536                      && puserscanin->chanlist[chanidx].channumber; chanidx++) {
 537
 538                         channel = puserscanin->chanlist[chanidx].channumber;
 539                         (pscanchanlist + chanidx)->channumber = channel;
 540
 541                         radiotype = puserscanin->chanlist[chanidx].radiotype;
 542                         (pscanchanlist + chanidx)->radiotype = radiotype;
 543
 544                         scantype = puserscanin->chanlist[chanidx].scantype;
 545
 546                         if (scantype == cmd_scan_type_passive) {
 547                                 (pscanchanlist +
 548                                  chanidx)->chanscanmode.passivescan = 1;
 549                         } else {
 550                                 (pscanchanlist +
 551                                  chanidx)->chanscanmode.passivescan = 0;
 552                         }
 553
 554                         if (puserscanin->chanlist[chanidx].scantime) {
 555                                 scandur =
 556                                     puserscanin->chanlist[chanidx].scantime;
 557                         } else {
 558                                 if (scantype == cmd_scan_type_passive) {
 559                                         scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
 560                                 } else {
 561                                         scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
 562                                 }
 563                         }
 564
 565                         (pscanchanlist + chanidx)->minscantime =
 566                             cpu_to_le16(scandur);
 567                         (pscanchanlist + chanidx)->maxscantime =
 568                             cpu_to_le16(scandur);
 569                 }
 570
 571                 /* Check if we are only scanning the current channel */
 572                 if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
 573                                        ==
 574                                        priv->adapter->curbssparams.channel)) {
 575                         *pscancurrentonly = 1;
 576                         lbs_pr_debug(1, "Scan: Scanning current channel only");
 577                 }
 578
 579         } else {
 580                 lbs_pr_debug(1, "Scan: Creating full region channel list\n");
 581                 wlan_scan_create_channel_list(priv, pscanchanlist,
 582                                               *pfilteredscan);
 583         }
 584
 585 out:
 586         return pscancfgout;
 587 }
 588
 589 /**
 590  *  @brief Construct and send multiple scan config commands to the firmware
 591  *
 592  *  Previous routines have created a wlan_scan_cmd_config with any requested
 593  *   TLVs.  This function splits the channel TLV into maxchanperscan lists
 594  *   and sends the portion of the channel TLV along with the other TLVs
 595  *   to the wlan_cmd routines for execution in the firmware.
 596  *
 597  *  @param priv            A pointer to wlan_private structure
 598  *  @param maxchanperscan  Maximum number channels to be included in each
 599  *                         scan command sent to firmware
 600  *  @param filteredscan    Flag indicating whether or not a BSSID or SSID
 601  *                         filter is being used for the firmware command
 602  *                         scan command sent to firmware
 603  *  @param pscancfgout     Scan configuration used for this scan.
 604  *  @param pchantlvout     Pointer in the pscancfgout where the channel TLV
 605  *                         should start.  This is past any other TLVs that
 606  *                         must be sent down in each firmware command.
 607  *  @param pscanchanlist   List of channels to scan in maxchanperscan segments
 608  *
 609  *  @return                0 or error return otherwise
 610  */
 611 static int wlan_scan_channel_list(wlan_private * priv,
 612                                   int maxchanperscan,
 613                                   u8 filteredscan,
 614                                   struct wlan_scan_cmd_config * pscancfgout,
 615                                   struct mrvlietypes_chanlistparamset * pchantlvout,
 616                                   struct chanscanparamset * pscanchanlist,
 617                                   const struct wlan_ioctl_user_scan_cfg * puserscanin,
 618                                   int full_scan)
 619 {
 620         struct chanscanparamset *ptmpchan;
 621         struct chanscanparamset *pstartchan;
 622         u8 scanband;
 623         int doneearly;
 624         int tlvidx;
 625         int ret = 0;
 626         int scanned = 0;
 627         union iwreq_data wrqu;
 628
 629         ENTER();
 630
 631         if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
 632                 lbs_pr_debug(1, "Scan: Null detect: %p, %p, %p\n",
 633                        pscancfgout, pchantlvout, pscanchanlist);
 634                 return -1;
 635         }
 636
 637         pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 638
 639         /* Set the temp channel struct pointer to the start of the desired list */
 640         ptmpchan = pscanchanlist;
 641
 642         if (priv->adapter->last_scanned_channel && !puserscanin)
 643                 ptmpchan += priv->adapter->last_scanned_channel;
 644
 645         /* Loop through the desired channel list, sending a new firmware scan
 646          *   commands for each maxchanperscan channels (or for 1,6,11 individually
 647          *   if configured accordingly)
 648          */
 649         while (ptmpchan->channumber) {
 650
 651                 tlvidx = 0;
 652                 pchantlvout->header.len = 0;
 653                 scanband = ptmpchan->radiotype;
 654                 pstartchan = ptmpchan;
 655                 doneearly = 0;
 656
 657                 /* Construct the channel TLV for the scan command.  Continue to
 658                  *  insert channel TLVs until:
 659                  *    - the tlvidx hits the maximum configured per scan command
 660                  *    - the next channel to insert is 0 (end of desired channel list)
 661                  *    - doneearly is set (controlling individual scanning of 1,6,11)
 662                  */
 663                 while (tlvidx < maxchanperscan && ptmpchan->channumber
 664                        && !doneearly && scanned < 2) {
 665
 666             lbs_pr_debug(1,
 667                     "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
 668                 ptmpchan->channumber, ptmpchan->radiotype,
 669                 ptmpchan->chanscanmode.passivescan,
 670                 ptmpchan->chanscanmode.disablechanfilt,
 671                 ptmpchan->maxscantime);
 672
 673                         /* Copy the current channel TLV to the command being prepared */
 674                         memcpy(pchantlvout->chanscanparam + tlvidx,
 675                                ptmpchan, sizeof(pchantlvout->chanscanparam));
 676
 677                         /* Increment the TLV header length by the size appended */
 678                         pchantlvout->header.len +=
 679                             sizeof(pchantlvout->chanscanparam);
 680
 681                         /*
 682                          *  The tlv buffer length is set to the number of bytes of the
 683                          *    between the channel tlv pointer and the start of the
 684                          *    tlv buffer.  This compensates for any TLVs that were appended
 685                          *    before the channel list.
 686                          */
 687                         pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
 688                                                      - pscancfgout->tlvbuffer);
 689
 690                         /*  Add the size of the channel tlv header and the data length */
 691                         pscancfgout->tlvbufferlen +=
 692                             (sizeof(pchantlvout->header)
 693                              + pchantlvout->header.len);
 694
 695                         /* Increment the index to the channel tlv we are constructing */
 696                         tlvidx++;
 697
 698                         doneearly = 0;
 699
 700                         /* Stop the loop if the *current* channel is in the 1,6,11 set
 701                          *   and we are not filtering on a BSSID or SSID.
 702                          */
 703                         if (!filteredscan && (ptmpchan->channumber == 1
 704                                               || ptmpchan->channumber == 6
 705                                               || ptmpchan->channumber == 11)) {
 706                                 doneearly = 1;
 707                         }
 708
 709                         /* Increment the tmp pointer to the next channel to be scanned */
 710                         ptmpchan++;
 711                         scanned++;
 712
 713                         /* Stop the loop if the *next* channel is in the 1,6,11 set.
 714                          *  This will cause it to be the only channel scanned on the next
 715                          *  interation
 716                          */
 717                         if (!filteredscan && (ptmpchan->channumber == 1
 718                                               || ptmpchan->channumber == 6
 719                                               || ptmpchan->channumber == 11)) {
 720                                 doneearly = 1;
 721                         }
 722                 }
 723
 724                 /* Send the scan command to the firmware with the specified cfg */
 725                 ret = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
 726                                             0, 0, pscancfgout);
 727                 if (scanned >= 2 && !full_scan) {
 728                         priv->adapter->last_scanned_channel = ptmpchan->channumber;
 729                         return 0;
 730                 }
 731                 scanned = 0;
 732         }
 733
 734         priv->adapter->last_scanned_channel = ptmpchan->channumber;
 735
 736         memset(&wrqu, 0, sizeof(union iwreq_data));
 737         wireless_send_event(priv->wlan_dev.netdev, SIOCGIWSCAN, &wrqu, NULL);
 738
 739         LEAVE();
 740         return ret;
 741 }
 742
 743 /**
 744  *  @brief Internal function used to start a scan based on an input config
 745  *
 746  *  Use the input user scan configuration information when provided in
 747  *    order to send the appropriate scan commands to firmware to populate or
 748  *    update the internal driver scan table
 749  *
 750  *  @param priv          A pointer to wlan_private structure
 751  *  @param puserscanin   Pointer to the input configuration for the requested
 752  *                       scan.
 753  *
 754  *  @return              0 or < 0 if error
 755  */
 756 int wlan_scan_networks(wlan_private * priv,
 757                               const struct wlan_ioctl_user_scan_cfg * puserscanin,
 758                               int full_scan)
 759 {
 760         wlan_adapter *adapter = priv->adapter;
 761         struct mrvlietypes_chanlistparamset *pchantlvout;
 762         struct chanscanparamset * scan_chan_list = NULL;
 763         struct wlan_scan_cmd_config * scan_cfg = NULL;
 764         u8 keeppreviousscan;
 765         u8 filteredscan;
 766         u8 scancurrentchanonly;
 767         int maxchanperscan;
 768         int ret;
 769
 770         ENTER();
 771
 772         scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
 773                                 WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
 774         if (scan_chan_list == NULL) {
 775                 ret = -ENOMEM;
 776                 goto out;
 777         }
 778
 779         scan_cfg = wlan_scan_setup_scan_config(priv,
 780                                                puserscanin,
 781                                                &pchantlvout,
 782                                                scan_chan_list,
 783                                                &maxchanperscan,
 784                                                &filteredscan,
 785                                                &scancurrentchanonly);
 786         if (scan_cfg == NULL) {
 787                 ret = -ENOMEM;
 788                 goto out;
 789         }
 790
 791         keeppreviousscan = 0;
 792
 793         if (puserscanin) {
 794                 keeppreviousscan = puserscanin->keeppreviousscan;
 795         }
 796
 797         if (adapter->last_scanned_channel)
 798                 keeppreviousscan = 1;
 799
 800         if (!keeppreviousscan) {
 801                 memset(adapter->scantable, 0x00,
 802                        sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST);
 803                 adapter->numinscantable = 0;
 804         }
 805
 806         /* Keep the data path active if we are only scanning our current channel */
 807         if (!scancurrentchanonly) {
 808                 netif_stop_queue(priv->wlan_dev.netdev);
 809                 netif_carrier_off(priv->wlan_dev.netdev);
 810         }
 811
 812         ret = wlan_scan_channel_list(priv,
 813                                      maxchanperscan,
 814                                      filteredscan,
 815                                      scan_cfg,
 816                                      pchantlvout,
 817                                      scan_chan_list,
 818                                      puserscanin,
 819                                      full_scan);
 820
 821         /*  Process the resulting scan table:
 822          *    - Remove any bad ssids
 823          *    - Update our current BSS information from scan data
 824          */
 825         wlan_scan_process_results(priv);
 826
 827         if (priv->adapter->connect_status == libertas_connected) {
 828                 netif_carrier_on(priv->wlan_dev.netdev);
 829                 netif_wake_queue(priv->wlan_dev.netdev);
 830         }
 831
 832 out:
 833         if (scan_cfg)
 834                 kfree(scan_cfg);
 835
 836         if (scan_chan_list)
 837                 kfree(scan_chan_list);
 838
 839         LEAVE();
 840         return ret;
 841 }
 842
 843 /**
 844  *  @brief Inspect the scan response buffer for pointers to expected TLVs
 845  *
 846  *  TLVs can be included at the end of the scan response BSS information.
 847  *    Parse the data in the buffer for pointers to TLVs that can potentially
 848  *    be passed back in the response
 849  *
 850  *  @param ptlv        Pointer to the start of the TLV buffer to parse
 851  *  @param tlvbufsize  size of the TLV buffer
 852  *  @param ptsftlv     Output parameter: Pointer to the TSF TLV if found
 853  *
 854  *  @return            void
 855  */
 856 static
 857 void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
 858                                        int tlvbufsize,
 859                                        struct mrvlietypes_tsftimestamp ** ptsftlv)
 860 {
 861         struct mrvlietypes_data *pcurrenttlv;
 862         int tlvbufleft;
 863         u16 tlvtype;
 864         u16 tlvlen;
 865
 866         pcurrenttlv = ptlv;
 867         tlvbufleft = tlvbufsize;
 868         *ptsftlv = NULL;
 869
 870         lbs_pr_debug(1, "SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
 871         lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
 872
 873         while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
 874                 tlvtype = le16_to_cpu(pcurrenttlv->header.type);
 875                 tlvlen = le16_to_cpu(pcurrenttlv->header.len);
 876
 877                 switch (tlvtype) {
 878                 case TLV_TYPE_TSFTIMESTAMP:
 879                         *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
 880                         break;
 881
 882                 default:
 883                         lbs_pr_debug(1, "SCAN_RESP: Unhandled TLV = %d\n",
 884                                tlvtype);
 885                         /* Give up, this seems corrupted */
 886                         return;
 887                 }               /* switch */
 888
 889                 tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
 890                 pcurrenttlv =
 891                     (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
 892         }                       /* while */
 893 }
 894
 895 /**
 896  *  @brief Interpret a BSS scan response returned from the firmware
 897  *
 898  *  Parse the various fixed fields and IEs passed back for a a BSS probe
 899  *   response or beacon from the scan command.  Record information as needed
 900  *   in the scan table struct bss_descriptor for that entry.
 901  *
 902  *  @param pBSSIDEntry  Output parameter: Pointer to the BSS Entry
 903  *
 904  *  @return             0 or -1
 905  */
 906 static int InterpretBSSDescriptionWithIE(struct bss_descriptor * pBSSEntry,
 907                                          u8 ** pbeaconinfo, int *bytesleft)
 908 {
 909         enum ieeetypes_elementid elemID;
 910         struct ieeetypes_fhparamset *pFH;
 911         struct ieeetypes_dsparamset *pDS;
 912         struct ieeetypes_cfparamset *pCF;
 913         struct ieeetypes_ibssparamset *pibss;
 914         struct ieeetypes_capinfo *pcap;
 915         struct WLAN_802_11_FIXED_IEs fixedie;
 916         u8 *pcurrentptr;
 917         u8 *pRate;
 918         u8 elemlen;
 919         u8 bytestocopy;
 920         u8 ratesize;
 921         u16 beaconsize;
 922         u8 founddatarateie;
 923         int bytesleftforcurrentbeacon;
 924
 925         struct IE_WPA *pIe;
 926         const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
 927
 928         struct ieeetypes_countryinfoset *pcountryinfo;
 929
 930         ENTER();
 931
 932         founddatarateie = 0;
 933         ratesize = 0;
 934         beaconsize = 0;
 935
 936         if (*bytesleft >= sizeof(beaconsize)) {
 937                 /* Extract & convert beacon size from the command buffer */
 938                 memcpy(&beaconsize, *pbeaconinfo, sizeof(beaconsize));
 939                 beaconsize = le16_to_cpu(beaconsize);
 940                 *bytesleft -= sizeof(beaconsize);
 941                 *pbeaconinfo += sizeof(beaconsize);
 942         }
 943
 944         if (beaconsize == 0 || beaconsize > *bytesleft) {
 945
 946                 *pbeaconinfo += *bytesleft;
 947                 *bytesleft = 0;
 948
 949                 return -1;
 950         }
 951
 952         /* Initialize the current working beacon pointer for this BSS iteration */
 953         pcurrentptr = *pbeaconinfo;
 954
 955         /* Advance the return beacon pointer past the current beacon */
 956         *pbeaconinfo += beaconsize;
 957         *bytesleft -= beaconsize;
 958
 959         bytesleftforcurrentbeacon = beaconsize;
 960
 961         memcpy(pBSSEntry->macaddress, pcurrentptr, ETH_ALEN);
 962         lbs_pr_debug(1, "InterpretIE: AP MAC Addr-%x:%x:%x:%x:%x:%x\n",
 963                pBSSEntry->macaddress[0], pBSSEntry->macaddress[1],
 964                pBSSEntry->macaddress[2], pBSSEntry->macaddress[3],
 965                pBSSEntry->macaddress[4], pBSSEntry->macaddress[5]);
 966
 967         pcurrentptr += ETH_ALEN;
 968         bytesleftforcurrentbeacon -= ETH_ALEN;
 969
 970         if (bytesleftforcurrentbeacon < 12) {
 971                 lbs_pr_debug(1, "InterpretIE: Not enough bytes left\n");
 972                 return -1;
 973         }
 974
 975         /*
 976          * next 4 fields are RSSI, time stamp, beacon interval,
 977          *   and capability information
 978          */
 979
 980         /* RSSI is 1 byte long */
 981         pBSSEntry->rssi = le32_to_cpu((long)(*pcurrentptr));
 982         lbs_pr_debug(1, "InterpretIE: RSSI=%02X\n", *pcurrentptr);
 983         pcurrentptr += 1;
 984         bytesleftforcurrentbeacon -= 1;
 985
 986         /* time stamp is 8 bytes long */
 987         memcpy(fixedie.timestamp, pcurrentptr, 8);
 988         memcpy(pBSSEntry->timestamp, pcurrentptr, 8);
 989         pcurrentptr += 8;
 990         bytesleftforcurrentbeacon -= 8;
 991
 992         /* beacon interval is 2 bytes long */
 993         memcpy(&fixedie.beaconinterval, pcurrentptr, 2);
 994         pBSSEntry->beaconperiod = le16_to_cpu(fixedie.beaconinterval);
 995         pcurrentptr += 2;
 996         bytesleftforcurrentbeacon -= 2;
 997
 998         /* capability information is 2 bytes long */
 999         memcpy(&fixedie.capabilities, pcurrentptr, 2);
1000         lbs_pr_debug(1, "InterpretIE: fixedie.capabilities=0x%X\n",
1001                fixedie.capabilities);
1002         fixedie.capabilities = le16_to_cpu(fixedie.capabilities);
1003         pcap = (struct ieeetypes_capinfo *) & fixedie.capabilities;
1004         memcpy(&pBSSEntry->cap, pcap, sizeof(struct ieeetypes_capinfo));
1005         pcurrentptr += 2;
1006         bytesleftforcurrentbeacon -= 2;
1007
1008         /* rest of the current buffer are IE's */
1009         lbs_pr_debug(1, "InterpretIE: IElength for this AP = %d\n",
1010                bytesleftforcurrentbeacon);
1011
1012         lbs_dbg_hex("InterpretIE: IE info", (u8 *) pcurrentptr,
1013                 bytesleftforcurrentbeacon);
1014
1015         if (pcap->privacy) {
1016                 lbs_pr_debug(1, "InterpretIE: AP WEP enabled\n");
1017                 pBSSEntry->privacy = wlan802_11privfilter8021xWEP;
1018         } else {
1019                 pBSSEntry->privacy = wlan802_11privfilteracceptall;
1020         }
1021
1022         if (pcap->ibss == 1) {
1023                 pBSSEntry->mode = IW_MODE_ADHOC;
1024         } else {
1025                 pBSSEntry->mode = IW_MODE_INFRA;
1026         }
1027
1028         /* process variable IE */
1029         while (bytesleftforcurrentbeacon >= 2) {
1030                 elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
1031                 elemlen = *((u8 *) pcurrentptr + 1);
1032
1033                 if (bytesleftforcurrentbeacon < elemlen) {
1034                         lbs_pr_debug(1, "InterpretIE: error in processing IE, "
1035                                "bytes left < IE length\n");
1036                         bytesleftforcurrentbeacon = 0;
1037                         continue;
1038                 }
1039
1040                 switch (elemID) {
1041
1042                 case SSID:
1043                         pBSSEntry->ssid.ssidlength = elemlen;
1044                         memcpy(pBSSEntry->ssid.ssid, (pcurrentptr + 2),
1045                                elemlen);
1046                         lbs_pr_debug(1, "ssid: %32s", pBSSEntry->ssid.ssid);
1047                         break;
1048
1049                 case SUPPORTED_RATES:
1050                         memcpy(pBSSEntry->datarates, (pcurrentptr + 2),
1051                                elemlen);
1052                         memmove(pBSSEntry->libertas_supported_rates, (pcurrentptr + 2),
1053                                 elemlen);
1054                         ratesize = elemlen;
1055                         founddatarateie = 1;
1056                         break;
1057
1058                 case EXTRA_IE:
1059                         lbs_pr_debug(1, "InterpretIE: EXTRA_IE Found!\n");
1060                         pBSSEntry->extra_ie = 1;
1061                         break;
1062
1063                 case FH_PARAM_SET:
1064                         pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
1065                         memmove(&pBSSEntry->phyparamset.fhparamset, pFH,
1066                                 sizeof(struct ieeetypes_fhparamset));
1067                         pBSSEntry->phyparamset.fhparamset.dwelltime
1068                             =
1069                             le16_to_cpu(pBSSEntry->phyparamset.fhparamset.
1070                                              dwelltime);
1071                         break;
1072
1073                 case DS_PARAM_SET:
1074                         pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
1075
1076                         pBSSEntry->channel = pDS->currentchan;
1077
1078                         memcpy(&pBSSEntry->phyparamset.dsparamset, pDS,
1079                                sizeof(struct ieeetypes_dsparamset));
1080                         break;
1081
1082                 case CF_PARAM_SET:
1083                         pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
1084
1085                         memcpy(&pBSSEntry->ssparamset.cfparamset, pCF,
1086                                sizeof(struct ieeetypes_cfparamset));
1087                         break;
1088
1089                 case IBSS_PARAM_SET:
1090                         pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
1091                         pBSSEntry->atimwindow =
1092                             le32_to_cpu(pibss->atimwindow);
1093
1094                         memmove(&pBSSEntry->ssparamset.ibssparamset, pibss,
1095                                 sizeof(struct ieeetypes_ibssparamset));
1096
1097                         pBSSEntry->ssparamset.ibssparamset.atimwindow
1098                             =
1099                             le16_to_cpu(pBSSEntry->ssparamset.ibssparamset.
1100                                              atimwindow);
1101                         break;
1102
1103                         /* Handle Country Info IE */
1104                 case COUNTRY_INFO:
1105                         pcountryinfo =
1106                             (struct ieeetypes_countryinfoset *) pcurrentptr;
1107
1108                         if (pcountryinfo->len <
1109                             sizeof(pcountryinfo->countrycode)
1110                             || pcountryinfo->len > 254) {
1111                                 lbs_pr_debug(1, "InterpretIE: 11D- Err "
1112                                        "CountryInfo len =%d min=%zd max=254\n",
1113                                        pcountryinfo->len,
1114                                        sizeof(pcountryinfo->countrycode));
1115                                 LEAVE();
1116                                 return -1;
1117                         }
1118
1119                         memcpy(&pBSSEntry->countryinfo,
1120                                pcountryinfo, pcountryinfo->len + 2);
1121                         lbs_dbg_hex("InterpretIE: 11D- CountryInfo:",
1122                                 (u8 *) pcountryinfo,
1123                                 (u32) (pcountryinfo->len + 2));
1124                         break;
1125
1126                 case EXTENDED_SUPPORTED_RATES:
1127                         /*
1128                          * only process extended supported rate
1129                          * if data rate is already found.
1130                          * data rate IE should come before
1131                          * extended supported rate IE
1132                          */
1133                         if (founddatarateie) {
1134                                 if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
1135                                         bytestocopy =
1136                                             (WLAN_SUPPORTED_RATES - ratesize);
1137                                 } else {
1138                                         bytestocopy = elemlen;
1139                                 }
1140
1141                                 pRate = (u8 *) pBSSEntry->datarates;
1142                                 pRate += ratesize;
1143                                 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1144
1145                                 pRate = (u8 *) pBSSEntry->libertas_supported_rates;
1146
1147                                 pRate += ratesize;
1148                                 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1149                         }
1150                         break;
1151
1152                 case VENDOR_SPECIFIC_221:
1153 #define IE_ID_LEN_FIELDS_BYTES 2
1154                         pIe = (struct IE_WPA *)pcurrentptr;
1155
1156                         if (memcmp(pIe->oui, oui01, sizeof(oui01)))
1157                                 break;
1158
1159                         pBSSEntry->wpa_ie_len = min_t(size_t,
1160                                 elemlen + IE_ID_LEN_FIELDS_BYTES,
1161                                 sizeof(pBSSEntry->wpa_ie));
1162                         memcpy(pBSSEntry->wpa_ie, pcurrentptr,
1163                                 pBSSEntry->wpa_ie_len);
1164                         lbs_dbg_hex("InterpretIE: Resp WPA_IE",
1165                                 pBSSEntry->wpa_ie, elemlen);
1166                         break;
1167                 case WPA2_IE:
1168                         pIe = (struct IE_WPA *)pcurrentptr;
1169
1170                         pBSSEntry->rsn_ie_len = min_t(size_t,
1171                                 elemlen + IE_ID_LEN_FIELDS_BYTES,
1172                                 sizeof(pBSSEntry->rsn_ie));
1173                         memcpy(pBSSEntry->rsn_ie, pcurrentptr,
1174                                 pBSSEntry->rsn_ie_len);
1175                         lbs_dbg_hex("InterpretIE: Resp WPA2_IE",
1176                                 pBSSEntry->rsn_ie, elemlen);
1177                         break;
1178                 case TIM:
1179                         break;
1180
1181                 case CHALLENGE_TEXT:
1182                         break;
1183                 }
1184
1185                 pcurrentptr += elemlen + 2;
1186
1187                 /* need to account for IE ID and IE len */
1188                 bytesleftforcurrentbeacon -= (elemlen + 2);
1189
1190         }                       /* while (bytesleftforcurrentbeacon > 2) */
1191
1192         return 0;
1193 }
1194
1195 /**
1196  *  @brief Compare two SSIDs
1197  *
1198  *  @param ssid1    A pointer to ssid to compare
1199  *  @param ssid2    A pointer to ssid to compare
1200  *
1201  *  @return         0--ssid is same, otherwise is different
1202  */
1203 int libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1, struct WLAN_802_11_SSID *ssid2)
1204 {
1205         if (!ssid1 || !ssid2)
1206                 return -1;
1207
1208         if (ssid1->ssidlength != ssid2->ssidlength)
1209                 return -1;
1210
1211         return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssidlength);
1212 }
1213
1214 /**
1215  *  @brief This function finds a specific compatible BSSID in the scan list
1216  *
1217  *  @param adapter  A pointer to wlan_adapter
1218  *  @param bssid    BSSID to find in the scan list
1219  *  @param mode     Network mode: Infrastructure or IBSS
1220  *
1221  *  @return         index in BSSID list, or error return code (< 0)
1222  */
1223 int libertas_find_BSSID_in_list(wlan_adapter * adapter, u8 * bssid, u8 mode)
1224 {
1225         int ret = -ENETUNREACH;
1226         int i;
1227
1228         if (!bssid)
1229                 return -EFAULT;
1230
1231         lbs_pr_debug(1, "FindBSSID: Num of BSSIDs = %d\n",
1232                adapter->numinscantable);
1233
1234         /* Look through the scan table for a compatible match. The ret return
1235          *   variable will be equal to the index in the scan table (greater
1236          *   than zero) if the network is compatible.  The loop will continue
1237          *   past a matched bssid that is not compatible in case there is an
1238          *   AP with multiple SSIDs assigned to the same BSSID
1239          */
1240         for (i = 0; ret < 0 && i < adapter->numinscantable; i++) {
1241                 if (!memcmp(adapter->scantable[i].macaddress, bssid, ETH_ALEN)) {
1242                         switch (mode) {
1243                         case IW_MODE_INFRA:
1244                         case IW_MODE_ADHOC:
1245                                 ret = is_network_compatible(adapter, i, mode);
1246                                 break;
1247                         default:
1248                                 ret = i;
1249                                 break;
1250                         }
1251                 }
1252         }
1253
1254         return ret;
1255 }
1256
1257 /**
1258  *  @brief This function finds ssid in ssid list.
1259  *
1260  *  @param adapter  A pointer to wlan_adapter
1261  *  @param ssid     SSID to find in the list
1262  *  @param bssid    BSSID to qualify the SSID selection (if provided)
1263  *  @param mode     Network mode: Infrastructure or IBSS
1264  *
1265  *  @return         index in BSSID list
1266  */
1267 int libertas_find_SSID_in_list(wlan_adapter * adapter,
1268                    struct WLAN_802_11_SSID *ssid, u8 * bssid, u8 mode)
1269 {
1270         int net = -ENETUNREACH;
1271         u8 bestrssi = 0;
1272         int i;
1273         int j;
1274
1275         lbs_pr_debug(1, "Num of Entries in Table = %d\n", adapter->numinscantable);
1276
1277         for (i = 0; i < adapter->numinscantable; i++) {
1278                 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid, ssid) &&
1279                     (!bssid ||
1280                      !memcmp(adapter->scantable[i].
1281                              macaddress, bssid, ETH_ALEN))) {
1282                         switch (mode) {
1283                         case IW_MODE_INFRA:
1284                         case IW_MODE_ADHOC:
1285                                 j = is_network_compatible(adapter, i, mode);
1286
1287                                 if (j >= 0) {
1288                                         if (bssid) {
1289                                                 return i;
1290                                         }
1291
1292                                         if (SCAN_RSSI
1293                                             (adapter->scantable[i].rssi)
1294                                             > bestrssi) {
1295                                                 bestrssi =
1296                                                     SCAN_RSSI(adapter->
1297                                                               scantable[i].
1298                                                               rssi);
1299                                                 net = i;
1300                                         }
1301                                 } else {
1302                                         if (net == -ENETUNREACH) {
1303                                                 net = j;
1304                                         }
1305                                 }
1306                                 break;
1307                         case IW_MODE_AUTO:
1308                         default:
1309                                 if (SCAN_RSSI(adapter->scantable[i].rssi)
1310                                     > bestrssi) {
1311                                         bestrssi =
1312                                             SCAN_RSSI(adapter->scantable[i].
1313                                                       rssi);
1314                                         net = i;
1315                                 }
1316                                 break;
1317                         }
1318                 }
1319         }
1320
1321         return net;
1322 }
1323
1324 /**
1325  *  @brief This function finds the best SSID in the Scan List
1326  *
1327  *  Search the scan table for the best SSID that also matches the current
1328  *   adapter network preference (infrastructure or adhoc)
1329  *
1330  *  @param adapter  A pointer to wlan_adapter
1331  *
1332  *  @return         index in BSSID list
1333  */
1334 int libertas_find_best_SSID_in_list(wlan_adapter * adapter, u8 mode)
1335 {
1336         int bestnet = -ENETUNREACH;
1337         u8 bestrssi = 0;
1338         int i;
1339
1340         ENTER();
1341
1342         lbs_pr_debug(1, "Num of BSSIDs = %d\n", adapter->numinscantable);
1343
1344         for (i = 0; i < adapter->numinscantable; i++) {
1345                 switch (mode) {
1346                 case IW_MODE_INFRA:
1347                 case IW_MODE_ADHOC:
1348                         if (is_network_compatible(adapter, i, mode) >= 0) {
1349                                 if (SCAN_RSSI(adapter->scantable[i].rssi) >
1350                                     bestrssi) {
1351                                         bestrssi =
1352                                             SCAN_RSSI(adapter->scantable[i].
1353                                                       rssi);
1354                                         bestnet = i;
1355                                 }
1356                         }
1357                         break;
1358                 case IW_MODE_AUTO:
1359                 default:
1360                         if (SCAN_RSSI(adapter->scantable[i].rssi) > bestrssi) {
1361                                 bestrssi =
1362                                     SCAN_RSSI(adapter->scantable[i].rssi);
1363                                 bestnet = i;
1364                         }
1365                         break;
1366                 }
1367         }
1368
1369         LEAVE();
1370         return bestnet;
1371 }
1372
1373 /**
1374  *  @brief Find the AP with specific ssid in the scan list
1375  *
1376  *  @param priv         A pointer to wlan_private structure
1377  *  @param pSSID        A pointer to AP's ssid
1378  *
1379  *  @return             0--success, otherwise--fail
1380  */
1381 int libertas_find_best_network_SSID(wlan_private * priv,
1382                                     struct WLAN_802_11_SSID *pSSID,
1383                                     u8 preferred_mode, u8 *out_mode)
1384 {
1385         wlan_adapter *adapter = priv->adapter;
1386         int ret = 0;
1387         struct bss_descriptor *preqbssid;
1388         int i;
1389
1390         ENTER();
1391
1392         memset(pSSID, 0, sizeof(struct WLAN_802_11_SSID));
1393
1394         wlan_scan_networks(priv, NULL, 1);
1395         if (adapter->surpriseremoved)
1396                 return -1;
1397         wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1398
1399         i = libertas_find_best_SSID_in_list(adapter, preferred_mode);
1400         if (i < 0) {
1401                 ret = -1;
1402                 goto out;
1403         }
1404
1405         preqbssid = &adapter->scantable[i];
1406         memcpy(pSSID, &preqbssid->ssid,
1407                sizeof(struct WLAN_802_11_SSID));
1408         *out_mode = preqbssid->mode;
1409
1410         if (!pSSID->ssidlength) {
1411                 ret = -1;
1412         }
1413
1414 out:
1415         LEAVE();
1416         return ret;
1417 }
1418
1419 /**
1420  *  @brief Scan Network
1421  *
1422  *  @param dev          A pointer to net_device structure
1423  *  @param info         A pointer to iw_request_info structure
1424  *  @param vwrq         A pointer to iw_param structure
1425  *  @param extra        A pointer to extra data buf
1426  *
1427  *  @return             0 --success, otherwise fail
1428  */
1429 int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
1430                   struct iw_param *vwrq, char *extra)
1431 {
1432         wlan_private *priv = dev->priv;
1433         wlan_adapter *adapter = priv->adapter;
1434
1435         ENTER();
1436
1437         wlan_scan_networks(priv, NULL, 0);
1438
1439         if (adapter->surpriseremoved)
1440                 return -1;
1441
1442         LEAVE();
1443         return 0;
1444 }
1445
1446 /**
1447  *  @brief Send a scan command for all available channels filtered on a spec
1448  *
1449  *  @param priv             A pointer to wlan_private structure
1450  *  @param prequestedssid   A pointer to AP's ssid
1451  *  @param keeppreviousscan Flag used to save/clear scan table before scan
1452  *
1453  *  @return                0-success, otherwise fail
1454  */
1455 int libertas_send_specific_SSID_scan(wlan_private * priv,
1456                          struct WLAN_802_11_SSID *prequestedssid,
1457                          u8 keeppreviousscan)
1458 {
1459         wlan_adapter *adapter = priv->adapter;
1460         struct wlan_ioctl_user_scan_cfg scancfg;
1461
1462         ENTER();
1463
1464         if (prequestedssid == NULL) {
1465                 return -1;
1466         }
1467
1468         memset(&scancfg, 0x00, sizeof(scancfg));
1469
1470         memcpy(scancfg.specificSSID, prequestedssid->ssid,
1471                prequestedssid->ssidlength);
1472         scancfg.keeppreviousscan = keeppreviousscan;
1473
1474         wlan_scan_networks(priv, &scancfg, 1);
1475         if (adapter->surpriseremoved)
1476                 return -1;
1477         wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1478
1479         LEAVE();
1480         return 0;
1481 }
1482
1483 /**
1484  *  @brief scan an AP with specific BSSID
1485  *
1486  *  @param priv             A pointer to wlan_private structure
1487  *  @param bssid            A pointer to AP's bssid
1488  *  @param keeppreviousscan Flag used to save/clear scan table before scan
1489  *
1490  *  @return          0-success, otherwise fail
1491  */
1492 int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
1493 {
1494         struct wlan_ioctl_user_scan_cfg scancfg;
1495
1496         ENTER();
1497
1498         if (bssid == NULL) {
1499                 return -1;
1500         }
1501
1502         memset(&scancfg, 0x00, sizeof(scancfg));
1503         memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
1504         scancfg.keeppreviousscan = keeppreviousscan;
1505
1506         wlan_scan_networks(priv, &scancfg, 1);
1507         if (priv->adapter->surpriseremoved)
1508                 return -1;
1509         wait_event_interruptible(priv->adapter->cmd_pending,
1510                 !priv->adapter->nr_cmd_pending);
1511
1512         LEAVE();
1513         return 0;
1514 }
1515
1516 /**
1517  *  @brief  Retrieve the scan table entries via wireless tools IOCTL call
1518  *
1519  *  @param dev          A pointer to net_device structure
1520  *  @param info         A pointer to iw_request_info structure
1521  *  @param dwrq         A pointer to iw_point structure
1522  *  @param extra        A pointer to extra data buf
1523  *
1524  *  @return             0 --success, otherwise fail
1525  */
1526 int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
1527                   struct iw_point *dwrq, char *extra)
1528 {
1529         wlan_private *priv = dev->priv;
1530         wlan_adapter *adapter = priv->adapter;
1531         int ret = 0;
1532         char *current_ev = extra;
1533         char *end_buf = extra + IW_SCAN_MAX_DATA;
1534         struct chan_freq_power *cfp;
1535         struct bss_descriptor *pscantable;
1536         char *current_val;      /* For rates */
1537         struct iw_event iwe;    /* Temporary buffer */
1538         int i;
1539         int j;
1540         int rate;
1541 #define PERFECT_RSSI ((u8)50)
1542 #define WORST_RSSI   ((u8)0)
1543 #define RSSI_DIFF    ((u8)(PERFECT_RSSI - WORST_RSSI))
1544         u8 rssi;
1545
1546         u8 buf[16 + 256 * 2];
1547         u8 *ptr;
1548
1549         ENTER();
1550
1551         /*
1552          * if there's either commands in the queue or one being
1553          * processed return -EAGAIN for iwlist to retry later.
1554          */
1555         if (adapter->nr_cmd_pending)
1556                 return -EAGAIN;
1557
1558         if (adapter->last_scanned_channel) {
1559                 wlan_scan_networks(priv, NULL, 0);
1560                 return -EAGAIN;
1561         }
1562
1563         if (adapter->connect_status == libertas_connected)
1564                 lbs_pr_debug(1, "Current ssid: %32s\n",
1565                        adapter->curbssparams.ssid.ssid);
1566
1567         lbs_pr_debug(1, "Scan: Get: numinscantable = %d\n",
1568                adapter->numinscantable);
1569
1570         /* The old API using SIOCGIWAPLIST had a hard limit of IW_MAX_AP.
1571          * The new API using SIOCGIWSCAN is only limited by buffer size
1572          * WE-14 -> WE-16 the buffer is limited to IW_SCAN_MAX_DATA bytes
1573          * which is 4096.
1574          */
1575         for (i = 0; i < adapter->numinscantable; i++) {
1576                 if ((current_ev + MAX_SCAN_CELL_SIZE) >= end_buf) {
1577                         lbs_pr_debug(1, "i=%d break out: current_ev=%p end_buf=%p "
1578                                "MAX_SCAN_CELL_SIZE=%zd\n",
1579                                i, current_ev, end_buf, MAX_SCAN_CELL_SIZE);
1580                         break;
1581                 }
1582
1583                 pscantable = &adapter->scantable[i];
1584
1585                 lbs_pr_debug(1, "i=%d  ssid: %32s\n", i, pscantable->ssid.ssid);
1586
1587                 cfp =
1588                     libertas_find_cfp_by_band_and_channel(adapter, 0,
1589                                                  pscantable->channel);
1590                 if (!cfp) {
1591                         lbs_pr_debug(1, "Invalid channel number %d\n",
1592                                pscantable->channel);
1593                         continue;
1594                 }
1595
1596                 if (!ssid_valid(&adapter->scantable[i].ssid)) {
1597                         continue;
1598                 }
1599
1600                 /* First entry *MUST* be the AP MAC address */
1601                 iwe.cmd = SIOCGIWAP;
1602                 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1603                 memcpy(iwe.u.ap_addr.sa_data,
1604                        &adapter->scantable[i].macaddress, ETH_ALEN);
1605
1606                 iwe.len = IW_EV_ADDR_LEN;
1607                 current_ev =
1608                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1609
1610                 //Add the ESSID
1611                 iwe.u.data.length = adapter->scantable[i].ssid.ssidlength;
1612
1613                 if (iwe.u.data.length > 32) {
1614                         iwe.u.data.length = 32;
1615                 }
1616
1617                 iwe.cmd = SIOCGIWESSID;
1618                 iwe.u.data.flags = 1;
1619                 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1620                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1621                                                   adapter->scantable[i].ssid.
1622                                                   ssid);
1623
1624                 //Add mode
1625                 iwe.cmd = SIOCGIWMODE;
1626                 iwe.u.mode = adapter->scantable[i].mode;
1627                 iwe.len = IW_EV_UINT_LEN;
1628                 current_ev =
1629                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1630
1631                 //frequency
1632                 iwe.cmd = SIOCGIWFREQ;
1633                 iwe.u.freq.m = (long)cfp->freq * 100000;
1634                 iwe.u.freq.e = 1;
1635                 iwe.len = IW_EV_FREQ_LEN;
1636                 current_ev =
1637                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1638
1639                 /* Add quality statistics */
1640                 iwe.cmd = IWEVQUAL;
1641                 iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
1642                 iwe.u.qual.level = SCAN_RSSI(adapter->scantable[i].rssi);
1643
1644                 rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
1645                 iwe.u.qual.qual =
1646                     (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
1647                      (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
1648                     (RSSI_DIFF * RSSI_DIFF);
1649                 if (iwe.u.qual.qual > 100)
1650                         iwe.u.qual.qual = 100;
1651                 else if (iwe.u.qual.qual < 1)
1652                         iwe.u.qual.qual = 0;
1653
1654                 if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
1655                         iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
1656                 } else {
1657                         iwe.u.qual.noise =
1658                             CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
1659                 }
1660                 if ((adapter->mode == IW_MODE_ADHOC) &&
1661                     !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1662                              &adapter->scantable[i].ssid)
1663                     && adapter->adhoccreate) {
1664                         ret = libertas_prepare_and_send_command(priv,
1665                                                     cmd_802_11_rssi,
1666                                                     0,
1667                                                     cmd_option_waitforrsp,
1668                                                     0, NULL);
1669
1670                         if (!ret) {
1671                                 iwe.u.qual.level =
1672                                     CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] /
1673                                              AVG_SCALE,
1674                                              adapter->NF[TYPE_RXPD][TYPE_AVG] /
1675                                              AVG_SCALE);
1676                         }
1677                 }
1678                 iwe.len = IW_EV_QUAL_LEN;
1679                 current_ev =
1680                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1681
1682                 /* Add encryption capability */
1683                 iwe.cmd = SIOCGIWENCODE;
1684                 if (adapter->scantable[i].privacy) {
1685                         iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1686                 } else {
1687                         iwe.u.data.flags = IW_ENCODE_DISABLED;
1688                 }
1689                 iwe.u.data.length = 0;
1690                 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1691                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1692                                                   adapter->scantable->ssid.
1693                                                   ssid);
1694
1695                 current_val = current_ev + IW_EV_LCP_LEN;
1696
1697                 iwe.cmd = SIOCGIWRATE;
1698
1699                 iwe.u.bitrate.fixed = 0;
1700                 iwe.u.bitrate.disabled = 0;
1701                 iwe.u.bitrate.value = 0;
1702
1703                 /* Bit rate given in 500 kb/s units (+ 0x80) */
1704                 for (j = 0; j < sizeof(adapter->scantable[i].libertas_supported_rates);
1705                      j++) {
1706                         if (adapter->scantable[i].libertas_supported_rates[j] == 0) {
1707                                 break;
1708                         }
1709                         rate =
1710                             (adapter->scantable[i].libertas_supported_rates[j] & 0x7F) *
1711                             500000;
1712                         if (rate > iwe.u.bitrate.value) {
1713                                 iwe.u.bitrate.value = rate;
1714                         }
1715
1716                         iwe.u.bitrate.value =
1717                             (adapter->scantable[i].libertas_supported_rates[j]
1718                              & 0x7f) * 500000;
1719                         iwe.len = IW_EV_PARAM_LEN;
1720                         current_ev =
1721                             iwe_stream_add_value(current_ev, current_val,
1722                                                  end_buf, &iwe, iwe.len);
1723
1724                 }
1725                 if ((adapter->scantable[i].mode == IW_MODE_ADHOC)
1726                     && !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1727                                 &adapter->scantable[i].ssid)
1728                     && adapter->adhoccreate) {
1729                         iwe.u.bitrate.value = 22 * 500000;
1730                 }
1731                 iwe.len = IW_EV_PARAM_LEN;
1732                 current_ev =
1733                     iwe_stream_add_value(current_ev, current_val, end_buf, &iwe,
1734                                          iwe.len);
1735
1736                 /* Add new value to event */
1737                 current_val = current_ev + IW_EV_LCP_LEN;
1738
1739                 if (adapter->scantable[i].rsn_ie[0] == WPA2_IE) {
1740                         memset(&iwe, 0, sizeof(iwe));
1741                         memset(buf, 0, sizeof(buf));
1742                         memcpy(buf, adapter->scantable[i].rsn_ie,
1743                                         adapter->scantable[i].rsn_ie_len);
1744                         iwe.cmd = IWEVGENIE;
1745                         iwe.u.data.length = adapter->scantable[i].rsn_ie_len;
1746                         iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1747                         current_ev = iwe_stream_add_point(current_ev, end_buf,
1748                                         &iwe, buf);
1749                 }
1750                 if (adapter->scantable[i].wpa_ie[0] == WPA_IE) {
1751                         memset(&iwe, 0, sizeof(iwe));
1752                         memset(buf, 0, sizeof(buf));
1753                         memcpy(buf, adapter->scantable[i].wpa_ie,
1754                                         adapter->scantable[i].wpa_ie_len);
1755                         iwe.cmd = IWEVGENIE;
1756                         iwe.u.data.length = adapter->scantable[i].wpa_ie_len;
1757                         iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1758                         current_ev = iwe_stream_add_point(current_ev, end_buf,
1759                                         &iwe, buf);
1760                 }
1761
1762
1763                 if (adapter->scantable[i].extra_ie != 0) {
1764                         memset(&iwe, 0, sizeof(iwe));
1765                         memset(buf, 0, sizeof(buf));
1766                         ptr = buf;
1767                         ptr += sprintf(ptr, "extra_ie");
1768                         iwe.u.data.length = strlen(buf);
1769
1770                         lbs_pr_debug(1, "iwe.u.data.length %d\n",
1771                                iwe.u.data.length);
1772                         lbs_pr_debug(1, "BUF: %s \n", buf);
1773
1774                         iwe.cmd = IWEVCUSTOM;
1775                         iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1776                         current_ev =
1777                             iwe_stream_add_point(current_ev, end_buf, &iwe,
1778                                                  buf);
1779                 }
1780
1781                 current_val = current_ev + IW_EV_LCP_LEN;
1782
1783                 /*
1784                  * Check if we added any event
1785                  */
1786                 if ((current_val - current_ev) > IW_EV_LCP_LEN)
1787                         current_ev = current_val;
1788         }
1789
1790         dwrq->length = (current_ev - extra);
1791         dwrq->flags = 0;
1792
1793         LEAVE();
1794         return 0;
1795 }
1796
1797 /**
1798  *  @brief Prepare a scan command to be sent to the firmware
1799  *
1800  *  Use the wlan_scan_cmd_config sent to the command processing module in
1801  *   the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1802  *   struct to send to firmware.
1803  *
1804  *  The fixed fields specifying the BSS type and BSSID filters as well as a
1805  *   variable number/length of TLVs are sent in the command to firmware.
1806  *
1807  *  @param priv       A pointer to wlan_private structure
1808  *  @param cmd        A pointer to cmd_ds_command structure to be sent to
1809  *                    firmware with the cmd_DS_801_11_SCAN structure
1810  *  @param pdata_buf  Void pointer cast of a wlan_scan_cmd_config struct used
1811  *                    to set the fields/TLVs for the command sent to firmware
1812  *
1813  *  @return           0 or -1
1814  *
1815  *  @sa wlan_scan_create_channel_list
1816  */
1817 int libertas_cmd_80211_scan(wlan_private * priv,
1818                          struct cmd_ds_command *cmd, void *pdata_buf)
1819 {
1820         struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
1821         struct wlan_scan_cmd_config *pscancfg;
1822
1823         ENTER();
1824
1825         pscancfg = pdata_buf;
1826
1827         /* Set fixed field variables in scan command */
1828         pscan->bsstype = pscancfg->bsstype;
1829         memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
1830         memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
1831
1832         cmd->command = cpu_to_le16(cmd_802_11_scan);
1833
1834         /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1835         cmd->size = cpu_to_le16(sizeof(pscan->bsstype)
1836                                      + sizeof(pscan->BSSID)
1837                                      + pscancfg->tlvbufferlen + S_DS_GEN);
1838
1839         lbs_pr_debug(1, "SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
1840                cmd->command, cmd->size, cmd->seqnum);
1841         LEAVE();
1842         return 0;
1843 }
1844
1845 /**
1846  *  @brief This function handles the command response of scan
1847  *
1848  *   The response buffer for the scan command has the following
1849  *      memory layout:
1850  *
1851  *     .-----------------------------------------------------------.
1852  *     |  header (4 * sizeof(u16)):  Standard command response hdr |
1853  *     .-----------------------------------------------------------.
1854  *     |  bufsize (u16) : sizeof the BSS Description data          |
1855  *     .-----------------------------------------------------------.
1856  *     |  NumOfSet (u8) : Number of BSS Descs returned             |
1857  *     .-----------------------------------------------------------.
1858  *     |  BSSDescription data (variable, size given in bufsize)    |
1859  *     .-----------------------------------------------------------.
1860  *     |  TLV data (variable, size calculated using header->size,  |
1861  *     |            bufsize and sizeof the fixed fields above)     |
1862  *     .-----------------------------------------------------------.
1863  *
1864  *  @param priv    A pointer to wlan_private structure
1865  *  @param resp    A pointer to cmd_ds_command
1866  *
1867  *  @return        0 or -1
1868  */
1869 int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
1870 {
1871         wlan_adapter *adapter = priv->adapter;
1872         struct cmd_ds_802_11_scan_rsp *pscan;
1873         struct bss_descriptor newbssentry;
1874         struct mrvlietypes_data *ptlv;
1875         struct mrvlietypes_tsftimestamp *ptsftlv;
1876         u8 *pbssinfo;
1877         u16 scanrespsize;
1878         int bytesleft;
1879         int numintable;
1880         int bssIdx;
1881         int idx;
1882         int tlvbufsize;
1883         u64 tsfval;
1884
1885         ENTER();
1886
1887         pscan = &resp->params.scanresp;
1888
1889         if (pscan->nr_sets > MRVDRV_MAX_BSSID_LIST) {
1890         lbs_pr_debug(1,
1891                        "SCAN_RESP: Invalid number of AP returned (%d)!!\n",
1892                        pscan->nr_sets);
1893                 LEAVE();
1894                 return -1;
1895         }
1896
1897         bytesleft = le16_to_cpu(pscan->bssdescriptsize);
1898         lbs_pr_debug(1, "SCAN_RESP: bssdescriptsize %d\n", bytesleft);
1899
1900         scanrespsize = le16_to_cpu(resp->size);
1901         lbs_pr_debug(1, "SCAN_RESP: returned %d AP before parsing\n",
1902                pscan->nr_sets);
1903
1904         numintable = adapter->numinscantable;
1905         pbssinfo = pscan->bssdesc_and_tlvbuffer;
1906
1907         /* The size of the TLV buffer is equal to the entire command response
1908          *   size (scanrespsize) minus the fixed fields (sizeof()'s), the
1909          *   BSS Descriptions (bssdescriptsize as bytesLef) and the command
1910          *   response header (S_DS_GEN)
1911          */
1912         tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
1913                                      + sizeof(pscan->nr_sets)
1914                                      + S_DS_GEN);
1915
1916         ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
1917
1918         /* Search the TLV buffer space in the scan response for any valid TLVs */
1919         wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
1920
1921         /*
1922          *  Process each scan response returned (pscan->nr_sets).  Save
1923          *    the information in the newbssentry and then insert into the
1924          *    driver scan table either as an update to an existing entry
1925          *    or as an addition at the end of the table
1926          */
1927         for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
1928                 /* Zero out the newbssentry we are about to store info in */
1929                 memset(&newbssentry, 0x00, sizeof(newbssentry));
1930
1931                 /* Process the data fields and IEs returned for this BSS */
1932                 if ((InterpretBSSDescriptionWithIE(&newbssentry,
1933                                                    &pbssinfo,
1934                                                    &bytesleft) ==
1935                      0)
1936                     && CHECK_SSID_IS_VALID(&newbssentry.ssid)) {
1937
1938             lbs_pr_debug(1,
1939                                "SCAN_RESP: BSSID = %02x:%02x:%02x:%02x:%02x:%02x\n",
1940                                newbssentry.macaddress[0],
1941                                newbssentry.macaddress[1],
1942                                newbssentry.macaddress[2],
1943                                newbssentry.macaddress[3],
1944                                newbssentry.macaddress[4],
1945                                newbssentry.macaddress[5]);
1946
1947                         /*
1948                          * Search the scan table for the same bssid
1949                          */
1950                         for (bssIdx = 0; bssIdx < numintable; bssIdx++) {
1951                                 if (memcmp(newbssentry.macaddress,
1952                                            adapter->scantable[bssIdx].
1953                                            macaddress,
1954                                            sizeof(newbssentry.macaddress)) ==
1955                                     0) {
1956                                         /*
1957                                          * If the SSID matches as well, it is a duplicate of
1958                                          *   this entry.  Keep the bssIdx set to this
1959                                          *   entry so we replace the old contents in the table
1960                                          */
1961                                         if ((newbssentry.ssid.ssidlength ==
1962                                              adapter->scantable[bssIdx].ssid.
1963                                              ssidlength)
1964                                             &&
1965                                             (memcmp
1966                                              (newbssentry.ssid.ssid,
1967                                               adapter->scantable[bssIdx].ssid.
1968                                               ssid,
1969                                               newbssentry.ssid.ssidlength) ==
1970                                              0)) {
1971                         lbs_pr_debug(1,
1972                                                        "SCAN_RESP: Duplicate of index: %d\n",
1973                                                        bssIdx);
1974                                                 break;
1975                                         }
1976                                 }
1977                         }
1978                         /*
1979                          * If the bssIdx is equal to the number of entries in the table,
1980                          *   the new entry was not a duplicate; append it to the scan
1981                          *   table
1982                          */
1983                         if (bssIdx == numintable) {
1984                                 /* Range check the bssIdx, keep it limited to the last entry */
1985                                 if (bssIdx == MRVDRV_MAX_BSSID_LIST) {
1986                                         bssIdx--;
1987                                 } else {
1988                                         numintable++;
1989                                 }
1990                         }
1991
1992                         /*
1993                          * If the TSF TLV was appended to the scan results, save the
1994                          *   this entries TSF value in the networktsf field.  The
1995                          *   networktsf is the firmware's TSF value at the time the
1996                          *   beacon or probe response was received.
1997                          */
1998                         if (ptsftlv) {
1999                                 memcpy(&tsfval, &ptsftlv->tsftable[idx],
2000                                        sizeof(tsfval));
2001                                 tsfval = le64_to_cpu(tsfval);
2002
2003                                 memcpy(&newbssentry.networktsf,
2004                                        &tsfval, sizeof(newbssentry.networktsf));
2005                         }
2006
2007                         /* Copy the locally created newbssentry to the scan table */
2008                         memcpy(&adapter->scantable[bssIdx],
2009                                &newbssentry,
2010                                sizeof(adapter->scantable[bssIdx]));
2011
2012                 } else {
2013
2014                         /* error parsing/interpreting the scan response, skipped */
2015                         lbs_pr_debug(1, "SCAN_RESP: "
2016                                "InterpretBSSDescriptionWithIE returned ERROR\n");
2017                 }
2018         }
2019
2020         lbs_pr_debug(1, "SCAN_RESP: Scanned %2d APs, %d valid, %d total\n",
2021                pscan->nr_sets, numintable - adapter->numinscantable,
2022                numintable);
2023
2024         /* Update the total number of BSSIDs in the scan table */
2025         adapter->numinscantable = numintable;
2026
2027         LEAVE();
2028         return 0;
2029 }