SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/libertas/scan.c

   1 /* -*- mode: C; tab-width: 4; indent-tabs-mode: nil -*- */
   2 /* vi: set expandtab shiftwidth=4 tabstop=4 textwidth=78: */
   3
   4 /**
   5   * Functions implementing wlan scan IOCTL and firmware command APIs
   6   *
   7   * IOCTL handlers as well as command preperation and response routines
   8   *  for sending scan commands to the firmware.
   9   */
  10 #include <linux/ctype.h>
  11 #include <linux/if.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/wireless.h>
  14
  15 #include <net/ieee80211.h>
  16 #include <net/iw_handler.h>
  17
  18 #include "host.h"
  19 #include "decl.h"
  20 #include "dev.h"
  21 #include "scan.h"
  22
  23 //! Approximate amount of data needed to pass a scan result back to iwlist
  24 #define MAX_SCAN_CELL_SIZE  (IW_EV_ADDR_LEN             \
  25                              + IW_ESSID_MAX_SIZE        \
  26                              + IW_EV_UINT_LEN           \
  27                              + IW_EV_FREQ_LEN           \
  28                              + IW_EV_QUAL_LEN           \
  29                              + IW_ESSID_MAX_SIZE        \
  30                              + IW_EV_PARAM_LEN          \
  31                              + 40)      /* 40 for WPAIE */
  32
  33 //! Memory needed to store a max sized channel List TLV for a firmware scan
  34 #define CHAN_TLV_MAX_SIZE  (sizeof(struct mrvlietypesheader)    \
  35                             + (MRVDRV_MAX_CHANNELS_PER_SCAN     \
  36                                * sizeof(struct chanscanparamset)))
  37
  38 //! Memory needed to store a max number/size SSID TLV for a firmware scan
  39 #define SSID_TLV_MAX_SIZE  (1 * sizeof(struct mrvlietypes_ssidparamset))
  40
  41 //! Maximum memory needed for a wlan_scan_cmd_config with all TLVs at max
  42 #define MAX_SCAN_CFG_ALLOC (sizeof(struct wlan_scan_cmd_config)  \
  43                             + sizeof(struct mrvlietypes_numprobes)   \
  44                             + CHAN_TLV_MAX_SIZE                 \
  45                             + SSID_TLV_MAX_SIZE)
  46
  47 //! The maximum number of channels the firmware can scan per command
  48 #define MRVDRV_MAX_CHANNELS_PER_SCAN   14
  49
  50 /**
  51  * @brief Number of channels to scan per firmware scan command issuance.
  52  *
  53  *  Number restricted to prevent hitting the limit on the amount of scan data
  54  *  returned in a single firmware scan command.
  55  */
  56 #define MRVDRV_CHANNELS_PER_SCAN_CMD   4
  57
  58 //! Scan time specified in the channel TLV for each channel for passive scans
  59 #define MRVDRV_PASSIVE_SCAN_CHAN_TIME  100
  60
  61 //! Scan time specified in the channel TLV for each channel for active scans
  62 #define MRVDRV_ACTIVE_SCAN_CHAN_TIME   100
  63
  64 //! Macro to enable/disable SSID checking before storing a scan table
  65 #ifdef DISCARD_BAD_SSID
  66 #define CHECK_SSID_IS_VALID(x) ssid_valid(&bssidEntry.ssid)
  67 #else
  68 #define CHECK_SSID_IS_VALID(x) 1
  69 #endif
  70
  71 /**
  72  *  @brief Check if a scanned network compatible with the driver settings
  73  *
  74  *   WEP     WPA     WPA2    ad-hoc  encrypt                      Network
  75  * enabled enabled  enabled   AES     mode   privacy  WPA  WPA2  Compatible
  76  *    0       0        0       0      NONE      0      0    0   yes No security
  77  *    1       0        0       0      NONE      1      0    0   yes Static WEP
  78  *    0       1        0       0       x        1x     1    x   yes WPA
  79  *    0       0        1       0       x        1x     x    1   yes WPA2
  80  *    0       0        0       1      NONE      1      0    0   yes Ad-hoc AES
  81  *    0       0        0       0     !=NONE     1      0    0   yes Dynamic WEP
  82  *
  83  *
  84  *  @param adapter A pointer to wlan_adapter
  85  *  @param index   Index in scantable to check against current driver settings
  86  *  @param mode    Network mode: Infrastructure or IBSS
  87  *
  88  *  @return        Index in scantable, or error code if negative
  89  */
  90 static int is_network_compatible(wlan_adapter * adapter, int index, int mode)
  91 {
  92         ENTER();
  93
  94         if (adapter->scantable[index].inframode == mode) {
  95                 if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
  96                     && !adapter->secinfo.WPAenabled
  97                     && !adapter->secinfo.WPA2enabled
  98                     && adapter->scantable[index].wpa_ie[0] != WPA_IE
  99                     && adapter->scantable[index].rsn_ie[0] != WPA2_IE
 100                     && adapter->secinfo.Encryptionmode == CIPHER_NONE
 101                     && !adapter->scantable[index].privacy) {
 102                         /* no security */
 103                         LEAVE();
 104                         return index;
 105                 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPenabled
 106                            && !adapter->secinfo.WPAenabled
 107                            && !adapter->secinfo.WPA2enabled
 108                            && adapter->scantable[index].privacy) {
 109                         /* static WEP enabled */
 110                         LEAVE();
 111                         return index;
 112                 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
 113                            && adapter->secinfo.WPAenabled
 114                            && !adapter->secinfo.WPA2enabled
 115                            && (adapter->scantable[index].wpa_ie[0] == WPA_IE)
 116                            /* privacy bit may NOT be set in some APs like LinkSys WRT54G
 117                               && adapter->scantable[index].privacy */
 118                     ) {
 119                         /* WPA enabled */
 120                         lbs_pr_debug(1,
 121                                "is_network_compatible() WPA: index=%d wpa_ie=%#x "
 122                                "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
 123                                "privacy=%#x\n", index,
 124                                adapter->scantable[index].wpa_ie[0],
 125                                adapter->scantable[index].rsn_ie[0],
 126                                (adapter->secinfo.WEPstatus ==
 127                                 wlan802_11WEPenabled) ? "e" : "d",
 128                                (adapter->secinfo.WPAenabled) ? "e" : "d",
 129                                (adapter->secinfo.WPA2enabled) ? "e" : "d",
 130                                adapter->secinfo.Encryptionmode,
 131                                adapter->scantable[index].privacy);
 132                         LEAVE();
 133                         return index;
 134                 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
 135                            && !adapter->secinfo.WPAenabled
 136                            && adapter->secinfo.WPA2enabled
 137                            && (adapter->scantable[index].rsn_ie[0] == WPA2_IE)
 138                            /* privacy bit may NOT be set in some APs like LinkSys WRT54G
 139                               && adapter->scantable[index].privacy */
 140                     ) {
 141                         /* WPA2 enabled */
 142                         lbs_pr_debug(1,
 143                                "is_network_compatible() WPA2: index=%d wpa_ie=%#x "
 144                                "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x "
 145                                "privacy=%#x\n", index,
 146                                adapter->scantable[index].wpa_ie[0],
 147                                adapter->scantable[index].rsn_ie[0],
 148                                (adapter->secinfo.WEPstatus ==
 149                                 wlan802_11WEPenabled) ? "e" : "d",
 150                                (adapter->secinfo.WPAenabled) ? "e" : "d",
 151                                (adapter->secinfo.WPA2enabled) ? "e" : "d",
 152                                adapter->secinfo.Encryptionmode,
 153                                adapter->scantable[index].privacy);
 154                         LEAVE();
 155                         return index;
 156                 } else if (adapter->secinfo.WEPstatus == wlan802_11WEPdisabled
 157                            && !adapter->secinfo.WPAenabled
 158                            && !adapter->secinfo.WPA2enabled
 159                            && (adapter->scantable[index].wpa_ie[0] != WPA_IE)
 160                            && (adapter->scantable[index].rsn_ie[0] != WPA2_IE)
 161                            && adapter->secinfo.Encryptionmode != CIPHER_NONE
 162                            && adapter->scantable[index].privacy) {
 163                         /* dynamic WEP enabled */
 164                         lbs_pr_debug(1,
 165                                "is_network_compatible() dynamic WEP: index=%d "
 166                                "wpa_ie=%#x wpa2_ie=%#x Encmode=%#x privacy=%#x\n",
 167                                index,
 168                                adapter->scantable[index].wpa_ie[0],
 169                                adapter->scantable[index].rsn_ie[0],
 170                                adapter->secinfo.Encryptionmode,
 171                                adapter->scantable[index].privacy);
 172                         LEAVE();
 173                         return index;
 174                 }
 175
 176                 /* security doesn't match */
 177                 lbs_pr_debug(1,
 178                        "is_network_compatible() FAILED: index=%d wpa_ie=%#x "
 179                        "wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s Encmode=%#x privacy=%#x\n",
 180                        index,
 181                        adapter->scantable[index].wpa_ie[0],
 182                        adapter->scantable[index].rsn_ie[0],
 183                        (adapter->secinfo.WEPstatus ==
 184                         wlan802_11WEPenabled) ? "e" : "d",
 185                        (adapter->secinfo.WPAenabled) ? "e" : "d",
 186                        (adapter->secinfo.WPA2enabled) ? "e" : "d",
 187                        adapter->secinfo.Encryptionmode,
 188                        adapter->scantable[index].privacy);
 189                 LEAVE();
 190                 return -ECONNREFUSED;
 191         }
 192
 193         /* mode doesn't match */
 194         LEAVE();
 195         return -ENETUNREACH;
 196 }
 197
 198 /**
 199  *  @brief This function validates a SSID as being able to be printed
 200  *
 201  *  @param pssid   SSID structure to validate
 202  *
 203  *  @return        TRUE or FALSE
 204  */
 205 static u8 ssid_valid(struct WLAN_802_11_SSID *pssid)
 206 {
 207         int ssididx;
 208
 209         for (ssididx = 0; ssididx < pssid->ssidlength; ssididx++) {
 210                 if (!isprint(pssid->ssid[ssididx])) {
 211                         return 0;
 212                 }
 213         }
 214
 215         return 1;
 216 }
 217
 218 /**
 219  *  @brief Post process the scan table after a new scan command has completed
 220  *
 221  *  Inspect each entry of the scan table and try to find an entry that
 222  *    matches our current associated/joined network from the scan.  If
 223  *    one is found, update the stored copy of the bssdescriptor for our
 224  *    current network.
 225  *
 226  *  Debug dump the current scan table contents if compiled accordingly.
 227  *
 228  *  @param priv   A pointer to wlan_private structure
 229  *
 230  *  @return       void
 231  */
 232 static void wlan_scan_process_results(wlan_private * priv)
 233 {
 234         wlan_adapter *adapter = priv->adapter;
 235         int foundcurrent;
 236         int i;
 237
 238         foundcurrent = 0;
 239
 240         if (adapter->connect_status == libertas_connected) {
 241                 /* try to find the current BSSID in the new scan list */
 242                 for (i = 0; i < adapter->numinscantable; i++) {
 243                         if (!libertas_SSID_cmp(&adapter->scantable[i].ssid,
 244                                      &adapter->curbssparams.ssid) &&
 245                             !memcmp(adapter->curbssparams.bssid,
 246                                     adapter->scantable[i].macaddress,
 247                                     ETH_ALEN)) {
 248                                 foundcurrent = 1;
 249                         }
 250                 }
 251
 252                 if (foundcurrent) {
 253                         /* Make a copy of current BSSID descriptor */
 254                         memcpy(&adapter->curbssparams.bssdescriptor,
 255                                &adapter->scantable[i],
 256                                sizeof(adapter->curbssparams.bssdescriptor));
 257                 }
 258         }
 259
 260         for (i = 0; i < adapter->numinscantable; i++) {
 261                 lbs_pr_debug(1, "Scan:(%02d) %02x:%02x:%02x:%02x:%02x:%02x, "
 262                        "RSSI[%03d], SSID[%s]\n",
 263                        i,
 264                        adapter->scantable[i].macaddress[0],
 265                        adapter->scantable[i].macaddress[1],
 266                        adapter->scantable[i].macaddress[2],
 267                        adapter->scantable[i].macaddress[3],
 268                        adapter->scantable[i].macaddress[4],
 269                        adapter->scantable[i].macaddress[5],
 270                        (s32) adapter->scantable[i].rssi,
 271                        adapter->scantable[i].ssid.ssid);
 272         }
 273 }
 274
 275 /**
 276  *  @brief Create a channel list for the driver to scan based on region info
 277  *
 278  *  Use the driver region/band information to construct a comprehensive list
 279  *    of channels to scan.  This routine is used for any scan that is not
 280  *    provided a specific channel list to scan.
 281  *
 282  *  @param priv          A pointer to wlan_private structure
 283  *  @param scanchanlist  Output parameter: resulting channel list to scan
 284  *  @param filteredscan  Flag indicating whether or not a BSSID or SSID filter
 285  *                       is being sent in the command to firmware.  Used to
 286  *                       increase the number of channels sent in a scan
 287  *                       command and to disable the firmware channel scan
 288  *                       filter.
 289  *
 290  *  @return              void
 291  */
 292 static void wlan_scan_create_channel_list(wlan_private * priv,
 293                                           struct chanscanparamset * scanchanlist,
 294                                           u8 filteredscan)
 295 {
 296
 297         wlan_adapter *adapter = priv->adapter;
 298         struct region_channel *scanregion;
 299         struct chan_freq_power *cfp;
 300         int rgnidx;
 301         int chanidx;
 302         int nextchan;
 303         u8 scantype;
 304
 305         chanidx = 0;
 306
 307         /* Set the default scan type to the user specified type, will later
 308          *   be changed to passive on a per channel basis if restricted by
 309          *   regulatory requirements (11d or 11h)
 310          */
 311         scantype = adapter->scantype;
 312
 313         for (rgnidx = 0; rgnidx < ARRAY_SIZE(adapter->region_channel); rgnidx++) {
 314                 if (priv->adapter->enable11d &&
 315                     adapter->connect_status != libertas_connected) {
 316                         /* Scan all the supported chan for the first scan */
 317                         if (!adapter->universal_channel[rgnidx].valid)
 318                                 continue;
 319                         scanregion = &adapter->universal_channel[rgnidx];
 320
 321                         /* clear the parsed_region_chan for the first scan */
 322                         memset(&adapter->parsed_region_chan, 0x00,
 323                                sizeof(adapter->parsed_region_chan));
 324                 } else {
 325                         if (!adapter->region_channel[rgnidx].valid)
 326                                 continue;
 327                         scanregion = &adapter->region_channel[rgnidx];
 328                 }
 329
 330                 for (nextchan = 0;
 331                      nextchan < scanregion->nrcfp; nextchan++, chanidx++) {
 332
 333                         cfp = scanregion->CFP + nextchan;
 334
 335                         if (priv->adapter->enable11d) {
 336                                 scantype =
 337                                     libertas_get_scan_type_11d(cfp->channel,
 338                                                            &adapter->
 339                                                            parsed_region_chan);
 340                         }
 341
 342                         switch (scanregion->band) {
 343                         case BAND_B:
 344                         case BAND_G:
 345                         default:
 346                                 scanchanlist[chanidx].radiotype =
 347                                     cmd_scan_radio_type_bg;
 348                                 break;
 349                         }
 350
 351                         if (scantype == cmd_scan_type_passive) {
 352                                 scanchanlist[chanidx].maxscantime =
 353                                     cpu_to_le16
 354                                     (MRVDRV_PASSIVE_SCAN_CHAN_TIME);
 355                                 scanchanlist[chanidx].chanscanmode.passivescan =
 356                                     1;
 357                         } else {
 358                                 scanchanlist[chanidx].maxscantime =
 359                                     cpu_to_le16
 360                                     (MRVDRV_ACTIVE_SCAN_CHAN_TIME);
 361                                 scanchanlist[chanidx].chanscanmode.passivescan =
 362                                     0;
 363                         }
 364
 365                         scanchanlist[chanidx].channumber = cfp->channel;
 366
 367                         if (filteredscan) {
 368                                 scanchanlist[chanidx].chanscanmode.
 369                                     disablechanfilt = 1;
 370                         }
 371                 }
 372         }
 373 }
 374
 375 /**
 376  *  @brief Construct a wlan_scan_cmd_config structure to use in issue scan cmds
 377  *
 378  *  Application layer or other functions can invoke wlan_scan_networks
 379  *    with a scan configuration supplied in a wlan_ioctl_user_scan_cfg struct.
 380  *    This structure is used as the basis of one or many wlan_scan_cmd_config
 381  *    commands that are sent to the command processing module and sent to
 382  *    firmware.
 383  *
 384  *  Create a wlan_scan_cmd_config based on the following user supplied
 385  *    parameters (if present):
 386  *             - SSID filter
 387  *             - BSSID filter
 388  *             - Number of Probes to be sent
 389  *             - channel list
 390  *
 391  *  If the SSID or BSSID filter is not present, disable/clear the filter.
 392  *  If the number of probes is not set, use the adapter default setting
 393  *  Qualify the channel
 394  *
 395  *  @param priv             A pointer to wlan_private structure
 396  *  @param puserscanin      NULL or pointer to scan configuration parameters
 397  *  @param ppchantlvout     Output parameter: Pointer to the start of the
 398  *                          channel TLV portion of the output scan config
 399  *  @param pscanchanlist    Output parameter: Pointer to the resulting channel
 400  *                          list to scan
 401  *  @param pmaxchanperscan  Output parameter: Number of channels to scan for
 402  *                          each issuance of the firmware scan command
 403  *  @param pfilteredscan    Output parameter: Flag indicating whether or not
 404  *                          a BSSID or SSID filter is being sent in the
 405  *                          command to firmware.  Used to increase the number
 406  *                          of channels sent in a scan command and to
 407  *                          disable the firmware channel scan filter.
 408  *  @param pscancurrentonly Output parameter: Flag indicating whether or not
 409  *                          we are only scanning our current active channel
 410  *
 411  *  @return                 resulting scan configuration
 412  */
 413 static struct wlan_scan_cmd_config *
 414 wlan_scan_setup_scan_config(wlan_private * priv,
 415                             const struct wlan_ioctl_user_scan_cfg * puserscanin,
 416                             struct mrvlietypes_chanlistparamset ** ppchantlvout,
 417                             struct chanscanparamset * pscanchanlist,
 418                             int *pmaxchanperscan,
 419                             u8 * pfilteredscan,
 420                             u8 * pscancurrentonly)
 421 {
 422         wlan_adapter *adapter = priv->adapter;
 423         const u8 zeromac[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
 424         struct mrvlietypes_numprobes *pnumprobestlv;
 425         struct mrvlietypes_ssidparamset *pssidtlv;
 426         struct wlan_scan_cmd_config * pscancfgout = NULL;
 427         u8 *ptlvpos;
 428         u16 numprobes;
 429         u16 ssidlen;
 430         int chanidx;
 431         int scantype;
 432         int scandur;
 433         int channel;
 434         int radiotype;
 435
 436         pscancfgout = kzalloc(MAX_SCAN_CFG_ALLOC, GFP_KERNEL);
 437         if (pscancfgout == NULL)
 438                 goto out;
 439
 440         /* The tlvbufferlen is calculated for each scan command.  The TLVs added
 441          *   in this routine will be preserved since the routine that sends
 442          *   the command will append channelTLVs at *ppchantlvout.  The difference
 443          *   between the *ppchantlvout and the tlvbuffer start will be used
 444          *   to calculate the size of anything we add in this routine.
 445          */
 446         pscancfgout->tlvbufferlen = 0;
 447
 448         /* Running tlv pointer.  Assigned to ppchantlvout at end of function
 449          *  so later routines know where channels can be added to the command buf
 450          */
 451         ptlvpos = pscancfgout->tlvbuffer;
 452
 453         /*
 454          * Set the initial scan paramters for progressive scanning.  If a specific
 455          *   BSSID or SSID is used, the number of channels in the scan command
 456          *   will be increased to the absolute maximum
 457          */
 458         *pmaxchanperscan = MRVDRV_CHANNELS_PER_SCAN_CMD;
 459
 460         /* Initialize the scan as un-filtered by firmware, set to TRUE below if
 461          *   a SSID or BSSID filter is sent in the command
 462          */
 463         *pfilteredscan = 0;
 464
 465         /* Initialize the scan as not being only on the current channel.  If
 466          *   the channel list is customized, only contains one channel, and
 467          *   is the active channel, this is set true and data flow is not halted.
 468          */
 469         *pscancurrentonly = 0;
 470
 471         if (puserscanin) {
 472
 473                 /* Set the bss type scan filter, use adapter setting if unset */
 474                 pscancfgout->bsstype =
 475                     (puserscanin->bsstype ? puserscanin->bsstype : adapter->
 476                      scanmode);
 477
 478                 /* Set the number of probes to send, use adapter setting if unset */
 479                 numprobes = (puserscanin->numprobes ? puserscanin->numprobes :
 480                              adapter->scanprobes);
 481
 482                 /*
 483                  * Set the BSSID filter to the incoming configuration,
 484                  *   if non-zero.  If not set, it will remain disabled (all zeros).
 485                  */
 486                 memcpy(pscancfgout->specificBSSID,
 487                        puserscanin->specificBSSID,
 488                        sizeof(pscancfgout->specificBSSID));
 489
 490                 ssidlen = strlen(puserscanin->specificSSID);
 491
 492                 if (ssidlen) {
 493                         pssidtlv =
 494                             (struct mrvlietypes_ssidparamset *) pscancfgout->
 495                             tlvbuffer;
 496                         pssidtlv->header.type = cpu_to_le16(TLV_TYPE_SSID);
 497                         pssidtlv->header.len = cpu_to_le16(ssidlen);
 498                         memcpy(pssidtlv->ssid, puserscanin->specificSSID,
 499                                ssidlen);
 500                         ptlvpos += sizeof(pssidtlv->header) + ssidlen;
 501                 }
 502
 503                 /*
 504                  *  The default number of channels sent in the command is low to
 505                  *    ensure the response buffer from the firmware does not truncate
 506                  *    scan results.  That is not an issue with an SSID or BSSID
 507                  *    filter applied to the scan results in the firmware.
 508                  */
 509                 if (ssidlen || (memcmp(pscancfgout->specificBSSID,
 510                                        &zeromac, sizeof(zeromac)) != 0)) {
 511                         *pmaxchanperscan = MRVDRV_MAX_CHANNELS_PER_SCAN;
 512                         *pfilteredscan = 1;
 513                 }
 514         } else {
 515                 pscancfgout->bsstype = adapter->scanmode;
 516                 numprobes = adapter->scanprobes;
 517         }
 518
 519         /* If the input config or adapter has the number of Probes set, add tlv */
 520         if (numprobes) {
 521                 pnumprobestlv = (struct mrvlietypes_numprobes *) ptlvpos;
 522                 pnumprobestlv->header.type =
 523                     cpu_to_le16(TLV_TYPE_NUMPROBES);
 524                 pnumprobestlv->header.len = sizeof(pnumprobestlv->numprobes);
 525                 pnumprobestlv->numprobes = cpu_to_le16(numprobes);
 526
 527                 ptlvpos +=
 528                     sizeof(pnumprobestlv->header) + pnumprobestlv->header.len;
 529
 530                 pnumprobestlv->header.len =
 531                     cpu_to_le16(pnumprobestlv->header.len);
 532         }
 533
 534         /*
 535          * Set the output for the channel TLV to the address in the tlv buffer
 536          *   past any TLVs that were added in this fuction (SSID, numprobes).
 537          *   channel TLVs will be added past this for each scan command, preserving
 538          *   the TLVs that were previously added.
 539          */
 540         *ppchantlvout = (struct mrvlietypes_chanlistparamset *) ptlvpos;
 541
 542         if (puserscanin && puserscanin->chanlist[0].channumber) {
 543
 544                 lbs_pr_debug(1, "Scan: Using supplied channel list\n");
 545
 546                 for (chanidx = 0;
 547                      chanidx < WLAN_IOCTL_USER_SCAN_CHAN_MAX
 548                      && puserscanin->chanlist[chanidx].channumber; chanidx++) {
 549
 550                         channel = puserscanin->chanlist[chanidx].channumber;
 551                         (pscanchanlist + chanidx)->channumber = channel;
 552
 553                         radiotype = puserscanin->chanlist[chanidx].radiotype;
 554                         (pscanchanlist + chanidx)->radiotype = radiotype;
 555
 556                         scantype = puserscanin->chanlist[chanidx].scantype;
 557
 558                         if (scantype == cmd_scan_type_passive) {
 559                                 (pscanchanlist +
 560                                  chanidx)->chanscanmode.passivescan = 1;
 561                         } else {
 562                                 (pscanchanlist +
 563                                  chanidx)->chanscanmode.passivescan = 0;
 564                         }
 565
 566                         if (puserscanin->chanlist[chanidx].scantime) {
 567                                 scandur =
 568                                     puserscanin->chanlist[chanidx].scantime;
 569                         } else {
 570                                 if (scantype == cmd_scan_type_passive) {
 571                                         scandur = MRVDRV_PASSIVE_SCAN_CHAN_TIME;
 572                                 } else {
 573                                         scandur = MRVDRV_ACTIVE_SCAN_CHAN_TIME;
 574                                 }
 575                         }
 576
 577                         (pscanchanlist + chanidx)->minscantime =
 578                             cpu_to_le16(scandur);
 579                         (pscanchanlist + chanidx)->maxscantime =
 580                             cpu_to_le16(scandur);
 581                 }
 582
 583                 /* Check if we are only scanning the current channel */
 584                 if ((chanidx == 1) && (puserscanin->chanlist[0].channumber
 585                                        ==
 586                                        priv->adapter->curbssparams.channel)) {
 587                         *pscancurrentonly = 1;
 588                         lbs_pr_debug(1, "Scan: Scanning current channel only");
 589                 }
 590
 591         } else {
 592                 lbs_pr_debug(1, "Scan: Creating full region channel list\n");
 593                 wlan_scan_create_channel_list(priv, pscanchanlist,
 594                                               *pfilteredscan);
 595         }
 596
 597 out:
 598         return pscancfgout;
 599 }
 600
 601 /**
 602  *  @brief Construct and send multiple scan config commands to the firmware
 603  *
 604  *  Previous routines have created a wlan_scan_cmd_config with any requested
 605  *   TLVs.  This function splits the channel TLV into maxchanperscan lists
 606  *   and sends the portion of the channel TLV along with the other TLVs
 607  *   to the wlan_cmd routines for execution in the firmware.
 608  *
 609  *  @param priv            A pointer to wlan_private structure
 610  *  @param maxchanperscan  Maximum number channels to be included in each
 611  *                         scan command sent to firmware
 612  *  @param filteredscan    Flag indicating whether or not a BSSID or SSID
 613  *                         filter is being used for the firmware command
 614  *                         scan command sent to firmware
 615  *  @param pscancfgout     Scan configuration used for this scan.
 616  *  @param pchantlvout     Pointer in the pscancfgout where the channel TLV
 617  *                         should start.  This is past any other TLVs that
 618  *                         must be sent down in each firmware command.
 619  *  @param pscanchanlist   List of channels to scan in maxchanperscan segments
 620  *
 621  *  @return                0 or error return otherwise
 622  */
 623 static int wlan_scan_channel_list(wlan_private * priv,
 624                                   int maxchanperscan,
 625                                   u8 filteredscan,
 626                                   struct wlan_scan_cmd_config * pscancfgout,
 627                                   struct mrvlietypes_chanlistparamset * pchantlvout,
 628                                   struct chanscanparamset * pscanchanlist)
 629 {
 630         struct chanscanparamset *ptmpchan;
 631         struct chanscanparamset *pstartchan;
 632         u8 scanband;
 633         int doneearly;
 634         int tlvidx;
 635         int ret = 0;
 636
 637         ENTER();
 638
 639         if (pscancfgout == 0 || pchantlvout == 0 || pscanchanlist == 0) {
 640                 lbs_pr_debug(1, "Scan: Null detect: %p, %p, %p\n",
 641                        pscancfgout, pchantlvout, pscanchanlist);
 642                 return -1;
 643         }
 644
 645         pchantlvout->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
 646
 647         /* Set the temp channel struct pointer to the start of the desired list */
 648         ptmpchan = pscanchanlist;
 649
 650         /* Loop through the desired channel list, sending a new firmware scan
 651          *   commands for each maxchanperscan channels (or for 1,6,11 individually
 652          *   if configured accordingly)
 653          */
 654         while (ptmpchan->channumber) {
 655
 656                 tlvidx = 0;
 657                 pchantlvout->header.len = 0;
 658                 scanband = ptmpchan->radiotype;
 659                 pstartchan = ptmpchan;
 660                 doneearly = 0;
 661
 662                 /* Construct the channel TLV for the scan command.  Continue to
 663                  *  insert channel TLVs until:
 664                  *    - the tlvidx hits the maximum configured per scan command
 665                  *    - the next channel to insert is 0 (end of desired channel list)
 666                  *    - doneearly is set (controlling individual scanning of 1,6,11)
 667                  */
 668                 while (tlvidx < maxchanperscan && ptmpchan->channumber
 669                        && !doneearly) {
 670
 671             lbs_pr_debug(1,
 672                     "Scan: Chan(%3d), Radio(%d), mode(%d,%d), Dur(%d)\n",
 673                 ptmpchan->channumber, ptmpchan->radiotype,
 674                 ptmpchan->chanscanmode.passivescan,
 675                 ptmpchan->chanscanmode.disablechanfilt,
 676                 ptmpchan->maxscantime);
 677
 678                         /* Copy the current channel TLV to the command being prepared */
 679                         memcpy(pchantlvout->chanscanparam + tlvidx,
 680                                ptmpchan, sizeof(pchantlvout->chanscanparam));
 681
 682                         /* Increment the TLV header length by the size appended */
 683                         pchantlvout->header.len +=
 684                             sizeof(pchantlvout->chanscanparam);
 685
 686                         /*
 687                          *  The tlv buffer length is set to the number of bytes of the
 688                          *    between the channel tlv pointer and the start of the
 689                          *    tlv buffer.  This compensates for any TLVs that were appended
 690                          *    before the channel list.
 691                          */
 692                         pscancfgout->tlvbufferlen = ((u8 *) pchantlvout
 693                                                      - pscancfgout->tlvbuffer);
 694
 695                         /*  Add the size of the channel tlv header and the data length */
 696                         pscancfgout->tlvbufferlen +=
 697                             (sizeof(pchantlvout->header)
 698                              + pchantlvout->header.len);
 699
 700                         /* Increment the index to the channel tlv we are constructing */
 701                         tlvidx++;
 702
 703                         doneearly = 0;
 704
 705                         /* Stop the loop if the *current* channel is in the 1,6,11 set
 706                          *   and we are not filtering on a BSSID or SSID.
 707                          */
 708                         if (!filteredscan && (ptmpchan->channumber == 1
 709                                               || ptmpchan->channumber == 6
 710                                               || ptmpchan->channumber == 11)) {
 711                                 doneearly = 1;
 712                         }
 713
 714                         /* Increment the tmp pointer to the next channel to be scanned */
 715                         ptmpchan++;
 716
 717                         /* Stop the loop if the *next* channel is in the 1,6,11 set.
 718                          *  This will cause it to be the only channel scanned on the next
 719                          *  interation
 720                          */
 721                         if (!filteredscan && (ptmpchan->channumber == 1
 722                                               || ptmpchan->channumber == 6
 723                                               || ptmpchan->channumber == 11)) {
 724                                 doneearly = 1;
 725                         }
 726                 }
 727
 728                 /* Send the scan command to the firmware with the specified cfg */
 729                 ret = libertas_prepare_and_send_command(priv, cmd_802_11_scan, 0,
 730                                             0, 0, pscancfgout);
 731         }
 732
 733         LEAVE();
 734         return ret;
 735 }
 736
 737 /**
 738  *  @brief Internal function used to start a scan based on an input config
 739  *
 740  *  Use the input user scan configuration information when provided in
 741  *    order to send the appropriate scan commands to firmware to populate or
 742  *    update the internal driver scan table
 743  *
 744  *  @param priv          A pointer to wlan_private structure
 745  *  @param puserscanin   Pointer to the input configuration for the requested
 746  *                       scan.
 747  *
 748  *  @return              0 or < 0 if error
 749  */
 750 int wlan_scan_networks(wlan_private * priv,
 751                               const struct wlan_ioctl_user_scan_cfg * puserscanin)
 752 {
 753         wlan_adapter *adapter = priv->adapter;
 754         struct mrvlietypes_chanlistparamset *pchantlvout;
 755         struct chanscanparamset * scan_chan_list = NULL;
 756         struct wlan_scan_cmd_config * scan_cfg = NULL;
 757         u8 keeppreviousscan;
 758         u8 filteredscan;
 759         u8 scancurrentchanonly;
 760         int maxchanperscan;
 761         int ret;
 762
 763         ENTER();
 764
 765         scan_chan_list = kzalloc(sizeof(struct chanscanparamset) *
 766                                 WLAN_IOCTL_USER_SCAN_CHAN_MAX, GFP_KERNEL);
 767         if (scan_chan_list == NULL) {
 768                 ret = -ENOMEM;
 769                 goto out;
 770         }
 771
 772         scan_cfg = wlan_scan_setup_scan_config(priv,
 773                                                puserscanin,
 774                                                &pchantlvout,
 775                                                scan_chan_list,
 776                                                &maxchanperscan,
 777                                                &filteredscan,
 778                                                &scancurrentchanonly);
 779         if (scan_cfg == NULL) {
 780                 ret = -ENOMEM;
 781                 goto out;
 782         }
 783
 784         keeppreviousscan = 0;
 785
 786         if (puserscanin) {
 787                 keeppreviousscan = puserscanin->keeppreviousscan;
 788         }
 789
 790         if (!keeppreviousscan) {
 791                 memset(adapter->scantable, 0x00,
 792                        sizeof(struct bss_descriptor) * MRVDRV_MAX_BSSID_LIST);
 793                 adapter->numinscantable = 0;
 794         }
 795
 796         /* Keep the data path active if we are only scanning our current channel */
 797         if (!scancurrentchanonly) {
 798                 netif_stop_queue(priv->wlan_dev.netdev);
 799                 netif_carrier_off(priv->wlan_dev.netdev);
 800         }
 801
 802         ret = wlan_scan_channel_list(priv,
 803                                      maxchanperscan,
 804                                      filteredscan,
 805                                      scan_cfg,
 806                                      pchantlvout,
 807                                      scan_chan_list);
 808
 809         /*  Process the resulting scan table:
 810          *    - Remove any bad ssids
 811          *    - Update our current BSS information from scan data
 812          */
 813         wlan_scan_process_results(priv);
 814
 815         if (priv->adapter->connect_status == libertas_connected) {
 816                 netif_carrier_on(priv->wlan_dev.netdev);
 817                 netif_wake_queue(priv->wlan_dev.netdev);
 818         }
 819
 820 out:
 821         if (scan_cfg)
 822                 kfree(scan_cfg);
 823
 824         if (scan_chan_list)
 825                 kfree(scan_chan_list);
 826
 827         LEAVE();
 828         return ret;
 829 }
 830
 831 /**
 832  *  @brief Inspect the scan response buffer for pointers to expected TLVs
 833  *
 834  *  TLVs can be included at the end of the scan response BSS information.
 835  *    Parse the data in the buffer for pointers to TLVs that can potentially
 836  *    be passed back in the response
 837  *
 838  *  @param ptlv        Pointer to the start of the TLV buffer to parse
 839  *  @param tlvbufsize  size of the TLV buffer
 840  *  @param ptsftlv     Output parameter: Pointer to the TSF TLV if found
 841  *
 842  *  @return            void
 843  */
 844 static
 845 void wlan_ret_802_11_scan_get_tlv_ptrs(struct mrvlietypes_data * ptlv,
 846                                        int tlvbufsize,
 847                                        struct mrvlietypes_tsftimestamp ** ptsftlv)
 848 {
 849         struct mrvlietypes_data *pcurrenttlv;
 850         int tlvbufleft;
 851         u16 tlvtype;
 852         u16 tlvlen;
 853
 854         pcurrenttlv = ptlv;
 855         tlvbufleft = tlvbufsize;
 856         *ptsftlv = NULL;
 857
 858         lbs_pr_debug(1, "SCAN_RESP: tlvbufsize = %d\n", tlvbufsize);
 859         lbs_dbg_hex("SCAN_RESP: TLV Buf", (u8 *) ptlv, tlvbufsize);
 860
 861         while (tlvbufleft >= sizeof(struct mrvlietypesheader)) {
 862                 tlvtype = le16_to_cpu(pcurrenttlv->header.type);
 863                 tlvlen = le16_to_cpu(pcurrenttlv->header.len);
 864
 865                 switch (tlvtype) {
 866                 case TLV_TYPE_TSFTIMESTAMP:
 867                         *ptsftlv = (struct mrvlietypes_tsftimestamp *) pcurrenttlv;
 868                         break;
 869
 870                 default:
 871                         lbs_pr_debug(1, "SCAN_RESP: Unhandled TLV = %d\n",
 872                                tlvtype);
 873                         /* Give up, this seems corrupted */
 874                         return;
 875                 }               /* switch */
 876
 877                 tlvbufleft -= (sizeof(ptlv->header) + tlvlen);
 878                 pcurrenttlv =
 879                     (struct mrvlietypes_data *) (pcurrenttlv->Data + tlvlen);
 880         }                       /* while */
 881 }
 882
 883 /**
 884  *  @brief Interpret a BSS scan response returned from the firmware
 885  *
 886  *  Parse the various fixed fields and IEs passed back for a a BSS probe
 887  *   response or beacon from the scan command.  Record information as needed
 888  *   in the scan table struct bss_descriptor for that entry.
 889  *
 890  *  @param pBSSIDEntry  Output parameter: Pointer to the BSS Entry
 891  *
 892  *  @return             0 or -1
 893  */
 894 static int InterpretBSSDescriptionWithIE(struct bss_descriptor * pBSSEntry,
 895                                          u8 ** pbeaconinfo, int *bytesleft)
 896 {
 897         enum ieeetypes_elementid elemID;
 898         struct ieeetypes_fhparamset *pFH;
 899         struct ieeetypes_dsparamset *pDS;
 900         struct ieeetypes_cfparamset *pCF;
 901         struct ieeetypes_ibssparamset *pibss;
 902         struct ieeetypes_capinfo *pcap;
 903         struct WLAN_802_11_FIXED_IEs fixedie;
 904         u8 *pcurrentptr;
 905         u8 *pRate;
 906         u8 elemlen;
 907         u8 bytestocopy;
 908         u8 ratesize;
 909         u16 beaconsize;
 910         u8 founddatarateie;
 911         int bytesleftforcurrentbeacon;
 912
 913         struct IE_WPA *pIe;
 914         const u8 oui01[4] = { 0x00, 0x50, 0xf2, 0x01 };
 915
 916         struct ieeetypes_countryinfoset *pcountryinfo;
 917
 918         ENTER();
 919
 920         founddatarateie = 0;
 921         ratesize = 0;
 922         beaconsize = 0;
 923
 924         if (*bytesleft >= sizeof(beaconsize)) {
 925                 /* Extract & convert beacon size from the command buffer */
 926                 memcpy(&beaconsize, *pbeaconinfo, sizeof(beaconsize));
 927                 beaconsize = le16_to_cpu(beaconsize);
 928                 *bytesleft -= sizeof(beaconsize);
 929                 *pbeaconinfo += sizeof(beaconsize);
 930         }
 931
 932         if (beaconsize == 0 || beaconsize > *bytesleft) {
 933
 934                 *pbeaconinfo += *bytesleft;
 935                 *bytesleft = 0;
 936
 937                 return -1;
 938         }
 939
 940         /* Initialize the current working beacon pointer for this BSS iteration */
 941         pcurrentptr = *pbeaconinfo;
 942
 943         /* Advance the return beacon pointer past the current beacon */
 944         *pbeaconinfo += beaconsize;
 945         *bytesleft -= beaconsize;
 946
 947         bytesleftforcurrentbeacon = beaconsize;
 948
 949         memcpy(pBSSEntry->macaddress, pcurrentptr, ETH_ALEN);
 950         lbs_pr_debug(1, "InterpretIE: AP MAC Addr-%x:%x:%x:%x:%x:%x\n",
 951                pBSSEntry->macaddress[0], pBSSEntry->macaddress[1],
 952                pBSSEntry->macaddress[2], pBSSEntry->macaddress[3],
 953                pBSSEntry->macaddress[4], pBSSEntry->macaddress[5]);
 954
 955         pcurrentptr += ETH_ALEN;
 956         bytesleftforcurrentbeacon -= ETH_ALEN;
 957
 958         if (bytesleftforcurrentbeacon < 12) {
 959                 lbs_pr_debug(1, "InterpretIE: Not enough bytes left\n");
 960                 return -1;
 961         }
 962
 963         /*
 964          * next 4 fields are RSSI, time stamp, beacon interval,
 965          *   and capability information
 966          */
 967
 968         /* RSSI is 1 byte long */
 969         pBSSEntry->rssi = le32_to_cpu((long)(*pcurrentptr));
 970         lbs_pr_debug(1, "InterpretIE: RSSI=%02X\n", *pcurrentptr);
 971         pcurrentptr += 1;
 972         bytesleftforcurrentbeacon -= 1;
 973
 974         /* time stamp is 8 bytes long */
 975         memcpy(fixedie.timestamp, pcurrentptr, 8);
 976         memcpy(pBSSEntry->timestamp, pcurrentptr, 8);
 977         pcurrentptr += 8;
 978         bytesleftforcurrentbeacon -= 8;
 979
 980         /* beacon interval is 2 bytes long */
 981         memcpy(&fixedie.beaconinterval, pcurrentptr, 2);
 982         pBSSEntry->beaconperiod = le16_to_cpu(fixedie.beaconinterval);
 983         pcurrentptr += 2;
 984         bytesleftforcurrentbeacon -= 2;
 985
 986         /* capability information is 2 bytes long */
 987         memcpy(&fixedie.capabilities, pcurrentptr, 2);
 988         lbs_pr_debug(1, "InterpretIE: fixedie.capabilities=0x%X\n",
 989                fixedie.capabilities);
 990         fixedie.capabilities = le16_to_cpu(fixedie.capabilities);
 991         pcap = (struct ieeetypes_capinfo *) & fixedie.capabilities;
 992         memcpy(&pBSSEntry->cap, pcap, sizeof(struct ieeetypes_capinfo));
 993         pcurrentptr += 2;
 994         bytesleftforcurrentbeacon -= 2;
 995
 996         /* rest of the current buffer are IE's */
 997         lbs_pr_debug(1, "InterpretIE: IElength for this AP = %d\n",
 998                bytesleftforcurrentbeacon);
 999
1000         lbs_dbg_hex("InterpretIE: IE info", (u8 *) pcurrentptr,
1001                 bytesleftforcurrentbeacon);
1002
1003         if (pcap->privacy) {
1004                 lbs_pr_debug(1, "InterpretIE: AP WEP enabled\n");
1005                 pBSSEntry->privacy = wlan802_11privfilter8021xWEP;
1006         } else {
1007                 pBSSEntry->privacy = wlan802_11privfilteracceptall;
1008         }
1009
1010         if (pcap->ibss == 1) {
1011                 pBSSEntry->inframode = wlan802_11ibss;
1012         } else {
1013                 pBSSEntry->inframode = wlan802_11infrastructure;
1014         }
1015
1016         /* process variable IE */
1017         while (bytesleftforcurrentbeacon >= 2) {
1018                 elemID = (enum ieeetypes_elementid) (*((u8 *) pcurrentptr));
1019                 elemlen = *((u8 *) pcurrentptr + 1);
1020
1021                 if (bytesleftforcurrentbeacon < elemlen) {
1022                         lbs_pr_debug(1, "InterpretIE: error in processing IE, "
1023                                "bytes left < IE length\n");
1024                         bytesleftforcurrentbeacon = 0;
1025                         continue;
1026                 }
1027
1028                 switch (elemID) {
1029
1030                 case SSID:
1031                         pBSSEntry->ssid.ssidlength = elemlen;
1032                         memcpy(pBSSEntry->ssid.ssid, (pcurrentptr + 2),
1033                                elemlen);
1034                         lbs_pr_debug(1, "ssid: %32s", pBSSEntry->ssid.ssid);
1035                         break;
1036
1037                 case SUPPORTED_RATES:
1038                         memcpy(pBSSEntry->datarates, (pcurrentptr + 2),
1039                                elemlen);
1040                         memmove(pBSSEntry->libertas_supported_rates, (pcurrentptr + 2),
1041                                 elemlen);
1042                         ratesize = elemlen;
1043                         founddatarateie = 1;
1044                         break;
1045
1046                 case EXTRA_IE:
1047                         lbs_pr_debug(1, "InterpretIE: EXTRA_IE Found!\n");
1048                         pBSSEntry->extra_ie = 1;
1049                         break;
1050
1051                 case FH_PARAM_SET:
1052                         pFH = (struct ieeetypes_fhparamset *) pcurrentptr;
1053                         memmove(&pBSSEntry->phyparamset.fhparamset, pFH,
1054                                 sizeof(struct ieeetypes_fhparamset));
1055                         pBSSEntry->phyparamset.fhparamset.dwelltime
1056                             =
1057                             le16_to_cpu(pBSSEntry->phyparamset.fhparamset.
1058                                              dwelltime);
1059                         break;
1060
1061                 case DS_PARAM_SET:
1062                         pDS = (struct ieeetypes_dsparamset *) pcurrentptr;
1063
1064                         pBSSEntry->channel = pDS->currentchan;
1065
1066                         memcpy(&pBSSEntry->phyparamset.dsparamset, pDS,
1067                                sizeof(struct ieeetypes_dsparamset));
1068                         break;
1069
1070                 case CF_PARAM_SET:
1071                         pCF = (struct ieeetypes_cfparamset *) pcurrentptr;
1072
1073                         memcpy(&pBSSEntry->ssparamset.cfparamset, pCF,
1074                                sizeof(struct ieeetypes_cfparamset));
1075                         break;
1076
1077                 case IBSS_PARAM_SET:
1078                         pibss = (struct ieeetypes_ibssparamset *) pcurrentptr;
1079                         pBSSEntry->atimwindow =
1080                             le32_to_cpu(pibss->atimwindow);
1081
1082                         memmove(&pBSSEntry->ssparamset.ibssparamset, pibss,
1083                                 sizeof(struct ieeetypes_ibssparamset));
1084
1085                         pBSSEntry->ssparamset.ibssparamset.atimwindow
1086                             =
1087                             le16_to_cpu(pBSSEntry->ssparamset.ibssparamset.
1088                                              atimwindow);
1089                         break;
1090
1091                         /* Handle Country Info IE */
1092                 case COUNTRY_INFO:
1093                         pcountryinfo =
1094                             (struct ieeetypes_countryinfoset *) pcurrentptr;
1095
1096                         if (pcountryinfo->len <
1097                             sizeof(pcountryinfo->countrycode)
1098                             || pcountryinfo->len > 254) {
1099                                 lbs_pr_debug(1, "InterpretIE: 11D- Err "
1100                                        "CountryInfo len =%d min=%d max=254\n",
1101                                        pcountryinfo->len,
1102                                        sizeof(pcountryinfo->countrycode));
1103                                 LEAVE();
1104                                 return -1;
1105                         }
1106
1107                         memcpy(&pBSSEntry->countryinfo,
1108                                pcountryinfo, pcountryinfo->len + 2);
1109                         lbs_dbg_hex("InterpretIE: 11D- CountryInfo:",
1110                                 (u8 *) pcountryinfo,
1111                                 (u32) (pcountryinfo->len + 2));
1112                         break;
1113
1114                 case EXTENDED_SUPPORTED_RATES:
1115                         /*
1116                          * only process extended supported rate
1117                          * if data rate is already found.
1118                          * data rate IE should come before
1119                          * extended supported rate IE
1120                          */
1121                         if (founddatarateie) {
1122                                 if ((elemlen + ratesize) > WLAN_SUPPORTED_RATES) {
1123                                         bytestocopy =
1124                                             (WLAN_SUPPORTED_RATES - ratesize);
1125                                 } else {
1126                                         bytestocopy = elemlen;
1127                                 }
1128
1129                                 pRate = (u8 *) pBSSEntry->datarates;
1130                                 pRate += ratesize;
1131                                 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1132
1133                                 pRate = (u8 *) pBSSEntry->libertas_supported_rates;
1134
1135                                 pRate += ratesize;
1136                                 memmove(pRate, (pcurrentptr + 2), bytestocopy);
1137                         }
1138                         break;
1139
1140                 case VENDOR_SPECIFIC_221:
1141 #define IE_ID_LEN_FIELDS_BYTES 2
1142                         pIe = (struct IE_WPA *)pcurrentptr;
1143
1144                         if (memcmp(pIe->oui, oui01, sizeof(oui01)))
1145                                 break;
1146
1147                         pBSSEntry->wpa_ie_len = min_t(size_t,
1148                                 elemlen + IE_ID_LEN_FIELDS_BYTES,
1149                                 sizeof(pBSSEntry->wpa_ie));
1150                         memcpy(pBSSEntry->wpa_ie, pcurrentptr,
1151                                 pBSSEntry->wpa_ie_len);
1152                         lbs_dbg_hex("InterpretIE: Resp WPA_IE",
1153                                 pBSSEntry->wpa_ie, elemlen);
1154                         break;
1155                 case WPA2_IE:
1156                         pIe = (struct IE_WPA *)pcurrentptr;
1157
1158                         pBSSEntry->rsn_ie_len = min_t(size_t,
1159                                 elemlen + IE_ID_LEN_FIELDS_BYTES,
1160                                 sizeof(pBSSEntry->rsn_ie));
1161                         memcpy(pBSSEntry->rsn_ie, pcurrentptr,
1162                                 pBSSEntry->rsn_ie_len);
1163                         lbs_dbg_hex("InterpretIE: Resp WPA2_IE",
1164                                 pBSSEntry->rsn_ie, elemlen);
1165                         break;
1166                 case TIM:
1167                         break;
1168
1169                 case CHALLENGE_TEXT:
1170                         break;
1171                 }
1172
1173                 pcurrentptr += elemlen + 2;
1174
1175                 /* need to account for IE ID and IE len */
1176                 bytesleftforcurrentbeacon -= (elemlen + 2);
1177
1178         }                       /* while (bytesleftforcurrentbeacon > 2) */
1179
1180         return 0;
1181 }
1182
1183 /**
1184  *  @brief Compare two SSIDs
1185  *
1186  *  @param ssid1    A pointer to ssid to compare
1187  *  @param ssid2    A pointer to ssid to compare
1188  *
1189  *  @return         0--ssid is same, otherwise is different
1190  */
1191 int libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1, struct WLAN_802_11_SSID *ssid2)
1192 {
1193         if (!ssid1 || !ssid2)
1194                 return -1;
1195
1196         if (ssid1->ssidlength != ssid2->ssidlength)
1197                 return -1;
1198
1199         return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssidlength);
1200 }
1201
1202 /**
1203  *  @brief This function finds a specific compatible BSSID in the scan list
1204  *
1205  *  @param adapter  A pointer to wlan_adapter
1206  *  @param bssid    BSSID to find in the scan list
1207  *  @param mode     Network mode: Infrastructure or IBSS
1208  *
1209  *  @return         index in BSSID list, or error return code (< 0)
1210  */
1211 int libertas_find_BSSID_in_list(wlan_adapter * adapter, u8 * bssid, int mode)
1212 {
1213         int ret = -ENETUNREACH;
1214         int i;
1215
1216         if (!bssid)
1217                 return -EFAULT;
1218
1219         lbs_pr_debug(1, "FindBSSID: Num of BSSIDs = %d\n",
1220                adapter->numinscantable);
1221
1222         /* Look through the scan table for a compatible match. The ret return
1223          *   variable will be equal to the index in the scan table (greater
1224          *   than zero) if the network is compatible.  The loop will continue
1225          *   past a matched bssid that is not compatible in case there is an
1226          *   AP with multiple SSIDs assigned to the same BSSID
1227          */
1228         for (i = 0; ret < 0 && i < adapter->numinscantable; i++) {
1229                 if (!memcmp(adapter->scantable[i].macaddress, bssid, ETH_ALEN)) {
1230                         switch (mode) {
1231                         case wlan802_11infrastructure:
1232                         case wlan802_11ibss:
1233                                 ret = is_network_compatible(adapter, i, mode);
1234                                 break;
1235                         default:
1236                                 ret = i;
1237                                 break;
1238                         }
1239                 }
1240         }
1241
1242         return ret;
1243 }
1244
1245 /**
1246  *  @brief This function finds ssid in ssid list.
1247  *
1248  *  @param adapter  A pointer to wlan_adapter
1249  *  @param ssid     SSID to find in the list
1250  *  @param bssid    BSSID to qualify the SSID selection (if provided)
1251  *  @param mode     Network mode: Infrastructure or IBSS
1252  *
1253  *  @return         index in BSSID list
1254  */
1255 int libertas_find_SSID_in_list(wlan_adapter * adapter,
1256                    struct WLAN_802_11_SSID *ssid, u8 * bssid, int mode)
1257 {
1258         int net = -ENETUNREACH;
1259         u8 bestrssi = 0;
1260         int i;
1261         int j;
1262
1263         lbs_pr_debug(1, "Num of Entries in Table = %d\n", adapter->numinscantable);
1264
1265         for (i = 0; i < adapter->numinscantable; i++) {
1266                 if (!libertas_SSID_cmp(&adapter->scantable[i].ssid, ssid) &&
1267                     (!bssid ||
1268                      !memcmp(adapter->scantable[i].
1269                              macaddress, bssid, ETH_ALEN))) {
1270                         switch (mode) {
1271                         case wlan802_11infrastructure:
1272                         case wlan802_11ibss:
1273                                 j = is_network_compatible(adapter, i, mode);
1274
1275                                 if (j >= 0) {
1276                                         if (bssid) {
1277                                                 return i;
1278                                         }
1279
1280                                         if (SCAN_RSSI
1281                                             (adapter->scantable[i].rssi)
1282                                             > bestrssi) {
1283                                                 bestrssi =
1284                                                     SCAN_RSSI(adapter->
1285                                                               scantable[i].
1286                                                               rssi);
1287                                                 net = i;
1288                                         }
1289                                 } else {
1290                                         if (net == -ENETUNREACH) {
1291                                                 net = j;
1292                                         }
1293                                 }
1294                                 break;
1295                         case wlan802_11autounknown:
1296                         default:
1297                                 if (SCAN_RSSI(adapter->scantable[i].rssi)
1298                                     > bestrssi) {
1299                                         bestrssi =
1300                                             SCAN_RSSI(adapter->scantable[i].
1301                                                       rssi);
1302                                         net = i;
1303                                 }
1304                                 break;
1305                         }
1306                 }
1307         }
1308
1309         return net;
1310 }
1311
1312 /**
1313  *  @brief This function finds the best SSID in the Scan List
1314  *
1315  *  Search the scan table for the best SSID that also matches the current
1316  *   adapter network preference (infrastructure or adhoc)
1317  *
1318  *  @param adapter  A pointer to wlan_adapter
1319  *
1320  *  @return         index in BSSID list
1321  */
1322 int libertas_find_best_SSID_in_list(wlan_adapter * adapter,
1323                                     enum WLAN_802_11_NETWORK_INFRASTRUCTURE mode)
1324 {
1325         int bestnet = -ENETUNREACH;
1326         u8 bestrssi = 0;
1327         int i;
1328
1329         ENTER();
1330
1331         lbs_pr_debug(1, "Num of BSSIDs = %d\n", adapter->numinscantable);
1332
1333         for (i = 0; i < adapter->numinscantable; i++) {
1334                 switch (mode) {
1335                 case wlan802_11infrastructure:
1336                 case wlan802_11ibss:
1337                         if (is_network_compatible(adapter, i, mode) >= 0) {
1338                                 if (SCAN_RSSI(adapter->scantable[i].rssi) >
1339                                     bestrssi) {
1340                                         bestrssi =
1341                                             SCAN_RSSI(adapter->scantable[i].
1342                                                       rssi);
1343                                         bestnet = i;
1344                                 }
1345                         }
1346                         break;
1347                 case wlan802_11autounknown:
1348                 default:
1349                         if (SCAN_RSSI(adapter->scantable[i].rssi) > bestrssi) {
1350                                 bestrssi =
1351                                     SCAN_RSSI(adapter->scantable[i].rssi);
1352                                 bestnet = i;
1353                         }
1354                         break;
1355                 }
1356         }
1357
1358         LEAVE();
1359         return bestnet;
1360 }
1361
1362 /**
1363  *  @brief Find the AP with specific ssid in the scan list
1364  *
1365  *  @param priv         A pointer to wlan_private structure
1366  *  @param pSSID        A pointer to AP's ssid
1367  *
1368  *  @return             0--success, otherwise--fail
1369  */
1370 int libertas_find_best_network_SSID(wlan_private * priv,
1371                                     struct WLAN_802_11_SSID *pSSID,
1372                                     enum WLAN_802_11_NETWORK_INFRASTRUCTURE preferred_mode,
1373                                     enum WLAN_802_11_NETWORK_INFRASTRUCTURE *out_mode)
1374 {
1375         wlan_adapter *adapter = priv->adapter;
1376         int ret = 0;
1377         struct bss_descriptor *preqbssid;
1378         int i;
1379
1380         ENTER();
1381
1382         memset(pSSID, 0, sizeof(struct WLAN_802_11_SSID));
1383
1384         wlan_scan_networks(priv, NULL);
1385         if (adapter->surpriseremoved)
1386                 return -1;
1387         wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1388
1389         i = libertas_find_best_SSID_in_list(adapter, preferred_mode);
1390         if (i < 0) {
1391                 ret = -1;
1392                 goto out;
1393         }
1394
1395         preqbssid = &adapter->scantable[i];
1396         memcpy(pSSID, &preqbssid->ssid,
1397                sizeof(struct WLAN_802_11_SSID));
1398         *out_mode = preqbssid->inframode;
1399
1400         if (!pSSID->ssidlength) {
1401                 ret = -1;
1402         }
1403
1404 out:
1405         LEAVE();
1406         return ret;
1407 }
1408
1409 /**
1410  *  @brief Scan Network
1411  *
1412  *  @param dev          A pointer to net_device structure
1413  *  @param info         A pointer to iw_request_info structure
1414  *  @param vwrq         A pointer to iw_param structure
1415  *  @param extra        A pointer to extra data buf
1416  *
1417  *  @return             0 --success, otherwise fail
1418  */
1419 int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
1420                   struct iw_param *vwrq, char *extra)
1421 {
1422         wlan_private *priv = dev->priv;
1423         wlan_adapter *adapter = priv->adapter;
1424         union iwreq_data wrqu;
1425
1426         ENTER();
1427
1428         if (!wlan_scan_networks(priv, NULL)) {
1429                 memset(&wrqu, 0, sizeof(union iwreq_data));
1430                 wireless_send_event(priv->wlan_dev.netdev, SIOCGIWSCAN, &wrqu,
1431                                     NULL);
1432         }
1433
1434         if (adapter->surpriseremoved)
1435                 return -1;
1436
1437         LEAVE();
1438         return 0;
1439 }
1440
1441 /**
1442  *  @brief Send a scan command for all available channels filtered on a spec
1443  *
1444  *  @param priv             A pointer to wlan_private structure
1445  *  @param prequestedssid   A pointer to AP's ssid
1446  *  @param keeppreviousscan Flag used to save/clear scan table before scan
1447  *
1448  *  @return                0-success, otherwise fail
1449  */
1450 int libertas_send_specific_SSID_scan(wlan_private * priv,
1451                          struct WLAN_802_11_SSID *prequestedssid,
1452                          u8 keeppreviousscan)
1453 {
1454         wlan_adapter *adapter = priv->adapter;
1455         struct wlan_ioctl_user_scan_cfg scancfg;
1456
1457         ENTER();
1458
1459         if (prequestedssid == NULL) {
1460                 return -1;
1461         }
1462
1463         memset(&scancfg, 0x00, sizeof(scancfg));
1464
1465         memcpy(scancfg.specificSSID, prequestedssid->ssid,
1466                prequestedssid->ssidlength);
1467         scancfg.keeppreviousscan = keeppreviousscan;
1468
1469         wlan_scan_networks(priv, &scancfg);
1470         if (adapter->surpriseremoved)
1471                 return -1;
1472         wait_event_interruptible(adapter->cmd_pending, !adapter->nr_cmd_pending);
1473
1474         LEAVE();
1475         return 0;
1476 }
1477
1478 /**
1479  *  @brief scan an AP with specific BSSID
1480  *
1481  *  @param priv             A pointer to wlan_private structure
1482  *  @param bssid            A pointer to AP's bssid
1483  *  @param keeppreviousscan Flag used to save/clear scan table before scan
1484  *
1485  *  @return          0-success, otherwise fail
1486  */
1487 int libertas_send_specific_BSSID_scan(wlan_private * priv, u8 * bssid, u8 keeppreviousscan)
1488 {
1489         struct wlan_ioctl_user_scan_cfg scancfg;
1490
1491         ENTER();
1492
1493         if (bssid == NULL) {
1494                 return -1;
1495         }
1496
1497         memset(&scancfg, 0x00, sizeof(scancfg));
1498         memcpy(scancfg.specificBSSID, bssid, sizeof(scancfg.specificBSSID));
1499         scancfg.keeppreviousscan = keeppreviousscan;
1500
1501         wlan_scan_networks(priv, &scancfg);
1502         if (priv->adapter->surpriseremoved)
1503                 return -1;
1504         wait_event_interruptible(priv->adapter->cmd_pending,
1505                 !priv->adapter->nr_cmd_pending);
1506
1507         LEAVE();
1508         return 0;
1509 }
1510
1511 /**
1512  *  @brief  Retrieve the scan table entries via wireless tools IOCTL call
1513  *
1514  *  @param dev          A pointer to net_device structure
1515  *  @param info         A pointer to iw_request_info structure
1516  *  @param dwrq         A pointer to iw_point structure
1517  *  @param extra        A pointer to extra data buf
1518  *
1519  *  @return             0 --success, otherwise fail
1520  */
1521 int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
1522                   struct iw_point *dwrq, char *extra)
1523 {
1524         wlan_private *priv = dev->priv;
1525         wlan_adapter *adapter = priv->adapter;
1526         int ret = 0;
1527         char *current_ev = extra;
1528         char *end_buf = extra + IW_SCAN_MAX_DATA;
1529         struct chan_freq_power *cfp;
1530         struct bss_descriptor *pscantable;
1531         char *current_val;      /* For rates */
1532         struct iw_event iwe;    /* Temporary buffer */
1533         int i;
1534         int j;
1535         int rate;
1536 #define PERFECT_RSSI ((u8)50)
1537 #define WORST_RSSI   ((u8)0)
1538 #define RSSI_DIFF    ((u8)(PERFECT_RSSI - WORST_RSSI))
1539         u8 rssi;
1540
1541         u8 buf[16 + 256 * 2];
1542         u8 *ptr;
1543
1544         ENTER();
1545
1546         /*
1547          * if there's either commands in the queue or one being
1548          * processed return -EAGAIN for iwlist to retry later.
1549          */
1550     if (adapter->nr_cmd_pending)
1551                 return -EAGAIN;
1552
1553         if (adapter->connect_status == libertas_connected)
1554                 lbs_pr_debug(1, "Current ssid: %32s\n",
1555                        adapter->curbssparams.ssid.ssid);
1556
1557         lbs_pr_debug(1, "Scan: Get: numinscantable = %d\n",
1558                adapter->numinscantable);
1559
1560         /* The old API using SIOCGIWAPLIST had a hard limit of IW_MAX_AP.
1561          * The new API using SIOCGIWSCAN is only limited by buffer size
1562          * WE-14 -> WE-16 the buffer is limited to IW_SCAN_MAX_DATA bytes
1563          * which is 4096.
1564          */
1565         for (i = 0; i < adapter->numinscantable; i++) {
1566                 if ((current_ev + MAX_SCAN_CELL_SIZE) >= end_buf) {
1567                         lbs_pr_debug(1, "i=%d break out: current_ev=%p end_buf=%p "
1568                                "MAX_SCAN_CELL_SIZE=%d\n",
1569                                i, current_ev, end_buf, MAX_SCAN_CELL_SIZE);
1570                         break;
1571                 }
1572
1573                 pscantable = &adapter->scantable[i];
1574
1575                 lbs_pr_debug(1, "i=%d  ssid: %32s\n", i, pscantable->ssid.ssid);
1576
1577                 cfp =
1578                     libertas_find_cfp_by_band_and_channel(adapter, 0,
1579                                                  pscantable->channel);
1580                 if (!cfp) {
1581                         lbs_pr_debug(1, "Invalid channel number %d\n",
1582                                pscantable->channel);
1583                         continue;
1584                 }
1585
1586                 if (!ssid_valid(&adapter->scantable[i].ssid)) {
1587                         continue;
1588                 }
1589
1590                 /* First entry *MUST* be the AP MAC address */
1591                 iwe.cmd = SIOCGIWAP;
1592                 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1593                 memcpy(iwe.u.ap_addr.sa_data,
1594                        &adapter->scantable[i].macaddress, ETH_ALEN);
1595
1596                 iwe.len = IW_EV_ADDR_LEN;
1597                 current_ev =
1598                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1599
1600                 //Add the ESSID
1601                 iwe.u.data.length = adapter->scantable[i].ssid.ssidlength;
1602
1603                 if (iwe.u.data.length > 32) {
1604                         iwe.u.data.length = 32;
1605                 }
1606
1607                 iwe.cmd = SIOCGIWESSID;
1608                 iwe.u.data.flags = 1;
1609                 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1610                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1611                                                   adapter->scantable[i].ssid.
1612                                                   ssid);
1613
1614                 //Add mode
1615                 iwe.cmd = SIOCGIWMODE;
1616                 iwe.u.mode = adapter->scantable[i].inframode + 1;
1617                 iwe.len = IW_EV_UINT_LEN;
1618                 current_ev =
1619                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1620
1621                 //frequency
1622                 iwe.cmd = SIOCGIWFREQ;
1623                 iwe.u.freq.m = (long)cfp->freq * 100000;
1624                 iwe.u.freq.e = 1;
1625                 iwe.len = IW_EV_FREQ_LEN;
1626                 current_ev =
1627                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1628
1629                 /* Add quality statistics */
1630                 iwe.cmd = IWEVQUAL;
1631                 iwe.u.qual.updated = IW_QUAL_ALL_UPDATED;
1632                 iwe.u.qual.level = SCAN_RSSI(adapter->scantable[i].rssi);
1633
1634                 rssi = iwe.u.qual.level - MRVDRV_NF_DEFAULT_SCAN_VALUE;
1635                 iwe.u.qual.qual =
1636                     (100 * RSSI_DIFF * RSSI_DIFF - (PERFECT_RSSI - rssi) *
1637                      (15 * (RSSI_DIFF) + 62 * (PERFECT_RSSI - rssi))) /
1638                     (RSSI_DIFF * RSSI_DIFF);
1639                 if (iwe.u.qual.qual > 100)
1640                         iwe.u.qual.qual = 100;
1641                 else if (iwe.u.qual.qual < 1)
1642                         iwe.u.qual.qual = 0;
1643
1644                 if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
1645                         iwe.u.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
1646                 } else {
1647                         iwe.u.qual.noise =
1648                             CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
1649                 }
1650                 if ((adapter->inframode == wlan802_11ibss) &&
1651                     !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1652                              &adapter->scantable[i].ssid)
1653                     && adapter->adhoccreate) {
1654                         ret = libertas_prepare_and_send_command(priv,
1655                                                     cmd_802_11_rssi,
1656                                                     0,
1657                                                     cmd_option_waitforrsp,
1658                                                     0, NULL);
1659
1660                         if (!ret) {
1661                                 iwe.u.qual.level =
1662                                     CAL_RSSI(adapter->SNR[TYPE_RXPD][TYPE_AVG] /
1663                                              AVG_SCALE,
1664                                              adapter->NF[TYPE_RXPD][TYPE_AVG] /
1665                                              AVG_SCALE);
1666                         }
1667                 }
1668                 iwe.len = IW_EV_QUAL_LEN;
1669                 current_ev =
1670                     iwe_stream_add_event(current_ev, end_buf, &iwe, iwe.len);
1671
1672                 /* Add encryption capability */
1673                 iwe.cmd = SIOCGIWENCODE;
1674                 if (adapter->scantable[i].privacy) {
1675                         iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1676                 } else {
1677                         iwe.u.data.flags = IW_ENCODE_DISABLED;
1678                 }
1679                 iwe.u.data.length = 0;
1680                 iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1681                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe,
1682                                                   adapter->scantable->ssid.
1683                                                   ssid);
1684
1685                 current_val = current_ev + IW_EV_LCP_LEN;
1686
1687                 iwe.cmd = SIOCGIWRATE;
1688
1689                 iwe.u.bitrate.fixed = 0;
1690                 iwe.u.bitrate.disabled = 0;
1691                 iwe.u.bitrate.value = 0;
1692
1693                 /* Bit rate given in 500 kb/s units (+ 0x80) */
1694                 for (j = 0; j < sizeof(adapter->scantable[i].libertas_supported_rates);
1695                      j++) {
1696                         if (adapter->scantable[i].libertas_supported_rates[j] == 0) {
1697                                 break;
1698                         }
1699                         rate =
1700                             (adapter->scantable[i].libertas_supported_rates[j] & 0x7F) *
1701                             500000;
1702                         if (rate > iwe.u.bitrate.value) {
1703                                 iwe.u.bitrate.value = rate;
1704                         }
1705
1706                         iwe.u.bitrate.value =
1707                             (adapter->scantable[i].libertas_supported_rates[j]
1708                              & 0x7f) * 500000;
1709                         iwe.len = IW_EV_PARAM_LEN;
1710                         current_ev =
1711                             iwe_stream_add_value(current_ev, current_val,
1712                                                  end_buf, &iwe, iwe.len);
1713
1714                 }
1715                 if ((adapter->scantable[i].inframode == wlan802_11ibss)
1716                     && !libertas_SSID_cmp(&adapter->curbssparams.ssid,
1717                                 &adapter->scantable[i].ssid)
1718                     && adapter->adhoccreate) {
1719                         iwe.u.bitrate.value = 22 * 500000;
1720                 }
1721                 iwe.len = IW_EV_PARAM_LEN;
1722                 current_ev =
1723                     iwe_stream_add_value(current_ev, current_val, end_buf, &iwe,
1724                                          iwe.len);
1725
1726                 /* Add new value to event */
1727                 current_val = current_ev + IW_EV_LCP_LEN;
1728
1729                 if (adapter->scantable[i].rsn_ie[0] == WPA2_IE) {
1730                         memset(&iwe, 0, sizeof(iwe));
1731                         memset(buf, 0, sizeof(buf));
1732                         memcpy(buf, adapter->scantable[i].rsn_ie,
1733                                         adapter->scantable[i].rsn_ie_len);
1734                         iwe.cmd = IWEVGENIE;
1735                         iwe.u.data.length = adapter->scantable[i].rsn_ie_len;
1736                         iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1737                         current_ev = iwe_stream_add_point(current_ev, end_buf,
1738                                         &iwe, buf);
1739                 }
1740                 if (adapter->scantable[i].wpa_ie[0] == WPA_IE) {
1741                         memset(&iwe, 0, sizeof(iwe));
1742                         memset(buf, 0, sizeof(buf));
1743                         memcpy(buf, adapter->scantable[i].wpa_ie,
1744                                         adapter->scantable[i].wpa_ie_len);
1745                         iwe.cmd = IWEVGENIE;
1746                         iwe.u.data.length = adapter->scantable[i].wpa_ie_len;
1747                         iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1748                         current_ev = iwe_stream_add_point(current_ev, end_buf,
1749                                         &iwe, buf);
1750                 }
1751
1752
1753                 if (adapter->scantable[i].extra_ie != 0) {
1754                         memset(&iwe, 0, sizeof(iwe));
1755                         memset(buf, 0, sizeof(buf));
1756                         ptr = buf;
1757                         ptr += sprintf(ptr, "extra_ie");
1758                         iwe.u.data.length = strlen(buf);
1759
1760                         lbs_pr_debug(1, "iwe.u.data.length %d\n",
1761                                iwe.u.data.length);
1762                         lbs_pr_debug(1, "BUF: %s \n", buf);
1763
1764                         iwe.cmd = IWEVCUSTOM;
1765                         iwe.len = IW_EV_POINT_LEN + iwe.u.data.length;
1766                         current_ev =
1767                             iwe_stream_add_point(current_ev, end_buf, &iwe,
1768                                                  buf);
1769                 }
1770
1771                 current_val = current_ev + IW_EV_LCP_LEN;
1772
1773                 /*
1774                  * Check if we added any event
1775                  */
1776                 if ((current_val - current_ev) > IW_EV_LCP_LEN)
1777                         current_ev = current_val;
1778         }
1779
1780         dwrq->length = (current_ev - extra);
1781         dwrq->flags = 0;
1782
1783         LEAVE();
1784         return 0;
1785 }
1786
1787 /**
1788  *  @brief Prepare a scan command to be sent to the firmware
1789  *
1790  *  Use the wlan_scan_cmd_config sent to the command processing module in
1791  *   the libertas_prepare_and_send_command to configure a cmd_ds_802_11_scan command
1792  *   struct to send to firmware.
1793  *
1794  *  The fixed fields specifying the BSS type and BSSID filters as well as a
1795  *   variable number/length of TLVs are sent in the command to firmware.
1796  *
1797  *  @param priv       A pointer to wlan_private structure
1798  *  @param cmd        A pointer to cmd_ds_command structure to be sent to
1799  *                    firmware with the cmd_DS_801_11_SCAN structure
1800  *  @param pdata_buf  Void pointer cast of a wlan_scan_cmd_config struct used
1801  *                    to set the fields/TLVs for the command sent to firmware
1802  *
1803  *  @return           0 or -1
1804  *
1805  *  @sa wlan_scan_create_channel_list
1806  */
1807 int libertas_cmd_80211_scan(wlan_private * priv,
1808                          struct cmd_ds_command *cmd, void *pdata_buf)
1809 {
1810         struct cmd_ds_802_11_scan *pscan = &cmd->params.scan;
1811         struct wlan_scan_cmd_config *pscancfg;
1812
1813         ENTER();
1814
1815         pscancfg = pdata_buf;
1816
1817         /* Set fixed field variables in scan command */
1818         pscan->bsstype = pscancfg->bsstype;
1819         memcpy(pscan->BSSID, pscancfg->specificBSSID, sizeof(pscan->BSSID));
1820         memcpy(pscan->tlvbuffer, pscancfg->tlvbuffer, pscancfg->tlvbufferlen);
1821
1822         cmd->command = cpu_to_le16(cmd_802_11_scan);
1823
1824         /* size is equal to the sizeof(fixed portions) + the TLV len + header */
1825         cmd->size = cpu_to_le16(sizeof(pscan->bsstype)
1826                                      + sizeof(pscan->BSSID)
1827                                      + pscancfg->tlvbufferlen + S_DS_GEN);
1828
1829         lbs_pr_debug(1, "SCAN_CMD: command=%x, size=%x, seqnum=%x\n",
1830                cmd->command, cmd->size, cmd->seqnum);
1831         LEAVE();
1832         return 0;
1833 }
1834
1835 /**
1836  *  @brief This function handles the command response of scan
1837  *
1838  *   The response buffer for the scan command has the following
1839  *      memory layout:
1840  *
1841  *     .-----------------------------------------------------------.
1842  *     |  header (4 * sizeof(u16)):  Standard command response hdr |
1843  *     .-----------------------------------------------------------.
1844  *     |  bufsize (u16) : sizeof the BSS Description data          |
1845  *     .-----------------------------------------------------------.
1846  *     |  NumOfSet (u8) : Number of BSS Descs returned             |
1847  *     .-----------------------------------------------------------.
1848  *     |  BSSDescription data (variable, size given in bufsize)    |
1849  *     .-----------------------------------------------------------.
1850  *     |  TLV data (variable, size calculated using header->size,  |
1851  *     |            bufsize and sizeof the fixed fields above)     |
1852  *     .-----------------------------------------------------------.
1853  *
1854  *  @param priv    A pointer to wlan_private structure
1855  *  @param resp    A pointer to cmd_ds_command
1856  *
1857  *  @return        0 or -1
1858  */
1859 int libertas_ret_80211_scan(wlan_private * priv, struct cmd_ds_command *resp)
1860 {
1861         wlan_adapter *adapter = priv->adapter;
1862         struct cmd_ds_802_11_scan_rsp *pscan;
1863         struct bss_descriptor newbssentry;
1864         struct mrvlietypes_data *ptlv;
1865         struct mrvlietypes_tsftimestamp *ptsftlv;
1866         u8 *pbssinfo;
1867         u16 scanrespsize;
1868         int bytesleft;
1869         int numintable;
1870         int bssIdx;
1871         int idx;
1872         int tlvbufsize;
1873         u64 tsfval;
1874
1875         ENTER();
1876
1877         pscan = &resp->params.scanresp;
1878
1879         if (pscan->nr_sets > MRVDRV_MAX_BSSID_LIST) {
1880         lbs_pr_debug(1,
1881                        "SCAN_RESP: Invalid number of AP returned (%d)!!\n",
1882                        pscan->nr_sets);
1883                 LEAVE();
1884                 return -1;
1885         }
1886
1887         bytesleft = le16_to_cpu(pscan->bssdescriptsize);
1888         lbs_pr_debug(1, "SCAN_RESP: bssdescriptsize %d\n", bytesleft);
1889
1890         scanrespsize = le16_to_cpu(resp->size);
1891         lbs_pr_debug(1, "SCAN_RESP: returned %d AP before parsing\n",
1892                pscan->nr_sets);
1893
1894         numintable = adapter->numinscantable;
1895         pbssinfo = pscan->bssdesc_and_tlvbuffer;
1896
1897         /* The size of the TLV buffer is equal to the entire command response
1898          *   size (scanrespsize) minus the fixed fields (sizeof()'s), the
1899          *   BSS Descriptions (bssdescriptsize as bytesLef) and the command
1900          *   response header (S_DS_GEN)
1901          */
1902         tlvbufsize = scanrespsize - (bytesleft + sizeof(pscan->bssdescriptsize)
1903                                      + sizeof(pscan->nr_sets)
1904                                      + S_DS_GEN);
1905
1906         ptlv = (struct mrvlietypes_data *) (pscan->bssdesc_and_tlvbuffer + bytesleft);
1907
1908         /* Search the TLV buffer space in the scan response for any valid TLVs */
1909         wlan_ret_802_11_scan_get_tlv_ptrs(ptlv, tlvbufsize, &ptsftlv);
1910
1911         /*
1912          *  Process each scan response returned (pscan->nr_sets).  Save
1913          *    the information in the newbssentry and then insert into the
1914          *    driver scan table either as an update to an existing entry
1915          *    or as an addition at the end of the table
1916          */
1917         for (idx = 0; idx < pscan->nr_sets && bytesleft; idx++) {
1918                 /* Zero out the newbssentry we are about to store info in */
1919                 memset(&newbssentry, 0x00, sizeof(newbssentry));
1920
1921                 /* Process the data fields and IEs returned for this BSS */
1922                 if ((InterpretBSSDescriptionWithIE(&newbssentry,
1923                                                    &pbssinfo,
1924                                                    &bytesleft) ==
1925                      0)
1926                     && CHECK_SSID_IS_VALID(&newbssentry.ssid)) {
1927
1928             lbs_pr_debug(1,
1929                                "SCAN_RESP: BSSID = %02x:%02x:%02x:%02x:%02x:%02x\n",
1930                                newbssentry.macaddress[0],
1931                                newbssentry.macaddress[1],
1932                                newbssentry.macaddress[2],
1933                                newbssentry.macaddress[3],
1934                                newbssentry.macaddress[4],
1935                                newbssentry.macaddress[5]);
1936
1937                         /*
1938                          * Search the scan table for the same bssid
1939                          */
1940                         for (bssIdx = 0; bssIdx < numintable; bssIdx++) {
1941                                 if (memcmp(newbssentry.macaddress,
1942                                            adapter->scantable[bssIdx].
1943                                            macaddress,
1944                                            sizeof(newbssentry.macaddress)) ==
1945                                     0) {
1946                                         /*
1947                                          * If the SSID matches as well, it is a duplicate of
1948                                          *   this entry.  Keep the bssIdx set to this
1949                                          *   entry so we replace the old contents in the table
1950                                          */
1951                                         if ((newbssentry.ssid.ssidlength ==
1952                                              adapter->scantable[bssIdx].ssid.
1953                                              ssidlength)
1954                                             &&
1955                                             (memcmp
1956                                              (newbssentry.ssid.ssid,
1957                                               adapter->scantable[bssIdx].ssid.
1958                                               ssid,
1959                                               newbssentry.ssid.ssidlength) ==
1960                                              0)) {
1961                         lbs_pr_debug(1,
1962                                                        "SCAN_RESP: Duplicate of index: %d\n",
1963                                                        bssIdx);
1964                                                 break;
1965                                         }
1966                                 }
1967                         }
1968                         /*
1969                          * If the bssIdx is equal to the number of entries in the table,
1970                          *   the new entry was not a duplicate; append it to the scan
1971                          *   table
1972                          */
1973                         if (bssIdx == numintable) {
1974                                 /* Range check the bssIdx, keep it limited to the last entry */
1975                                 if (bssIdx == MRVDRV_MAX_BSSID_LIST) {
1976                                         bssIdx--;
1977                                 } else {
1978                                         numintable++;
1979                                 }
1980                         }
1981
1982                         /*
1983                          * If the TSF TLV was appended to the scan results, save the
1984                          *   this entries TSF value in the networktsf field.  The
1985                          *   networktsf is the firmware's TSF value at the time the
1986                          *   beacon or probe response was received.
1987                          */
1988                         if (ptsftlv) {
1989                                 memcpy(&tsfval, &ptsftlv->tsftable[idx],
1990                                        sizeof(tsfval));
1991                                 tsfval = le64_to_cpu(tsfval);
1992
1993                                 memcpy(&newbssentry.networktsf,
1994                                        &tsfval, sizeof(newbssentry.networktsf));
1995                         }
1996
1997                         /* Copy the locally created newbssentry to the scan table */
1998                         memcpy(&adapter->scantable[bssIdx],
1999                                &newbssentry,
2000                                sizeof(adapter->scantable[bssIdx]));
2001
2002                 } else {
2003
2004                         /* error parsing/interpreting the scan response, skipped */
2005                         lbs_pr_debug(1, "SCAN_RESP: "
2006                                "InterpretBSSDescriptionWithIE returned ERROR\n");
2007                 }
2008         }
2009
2010         lbs_pr_debug(1, "SCAN_RESP: Scanned %2d APs, %d valid, %d total\n",
2011                pscan->nr_sets, numintable - adapter->numinscantable,
2012                numintable);
2013
2014         /* Update the total number of BSSIDs in the scan table */
2015         adapter->numinscantable = numintable;
2016
2017         LEAVE();
2018         return 0;
2019 }