drivers/staging/wlan-ng/p80211netdev.c

   1 /* src/p80211/p80211knetdev.c
   2 *
   3 * Linux Kernel net device interface
   4 *
   5 * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
   6 * --------------------------------------------------------------------
   7 *
   8 * linux-wlan
   9 *
  10 *   The contents of this file are subject to the Mozilla Public
  11 *   License Version 1.1 (the "License"); you may not use this file
  12 *   except in compliance with the License. You may obtain a copy of
  13 *   the License at http://www.mozilla.org/MPL/
  14 *
  15 *   Software distributed under the License is distributed on an "AS
  16 *   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  17 *   implied. See the License for the specific language governing
  18 *   rights and limitations under the License.
  19 *
  20 *   Alternatively, the contents of this file may be used under the
  21 *   terms of the GNU Public License version 2 (the "GPL"), in which
  22 *   case the provisions of the GPL are applicable instead of the
  23 *   above.  If you wish to allow the use of your version of this file
  24 *   only under the terms of the GPL and not to allow others to use
  25 *   your version of this file under the MPL, indicate your decision
  26 *   by deleting the provisions above and replace them with the notice
  27 *   and other provisions required by the GPL.  If you do not delete
  28 *   the provisions above, a recipient may use your version of this
  29 *   file under either the MPL or the GPL.
  30 *
  31 * --------------------------------------------------------------------
  32 *
  33 * Inquiries regarding the linux-wlan Open Source project can be
  34 * made directly to:
  35 *
  36 * AbsoluteValue Systems Inc.
  37 * info@linux-wlan.com
  38 * http://www.linux-wlan.com
  39 *
  40 * --------------------------------------------------------------------
  41 *
  42 * Portions of the development of this software were funded by
  43 * Intersil Corporation as part of PRISM(R) chipset product development.
  44 *
  45 * --------------------------------------------------------------------
  46 *
  47 * The functions required for a Linux network device are defined here.
  48 *
  49 * --------------------------------------------------------------------
  50 */
  51
  52 #include <linux/version.h>
  53 #include <linux/module.h>
  54 #include <linux/kernel.h>
  55 #include <linux/sched.h>
  56 #include <linux/types.h>
  57 #include <linux/skbuff.h>
  58 #include <linux/slab.h>
  59 #include <linux/proc_fs.h>
  60 #include <linux/interrupt.h>
  61 #include <linux/netdevice.h>
  62 #include <linux/kmod.h>
  63 #include <linux/if_arp.h>
  64 #include <linux/wireless.h>
  65 #include <linux/sockios.h>
  66 #include <linux/etherdevice.h>
  67 #include <linux/if_ether.h>
  68 #include <linux/byteorder/generic.h>
  69 #include <linux/bitops.h>
  70 #include <linux/uaccess.h>
  71 #include <asm/byteorder.h>
  72
  73 #ifdef SIOCETHTOOL
  74 #include <linux/ethtool.h>
  75 #endif
  76
  77 #include <net/iw_handler.h>
  78 #include <net/net_namespace.h>
  79
  80 /*================================================================*/
  81 /* Project Includes */
  82
  83 #include "p80211types.h"
  84 #include "p80211hdr.h"
  85 #include "p80211conv.h"
  86 #include "p80211mgmt.h"
  87 #include "p80211msg.h"
  88 #include "p80211netdev.h"
  89 #include "p80211ioctl.h"
  90 #include "p80211req.h"
  91 #include "p80211metastruct.h"
  92 #include "p80211metadef.h"
  93
  94 /* Support functions */
  95 static void p80211netdev_rx_bh(unsigned long arg);
  96
  97 /* netdevice method functions */
  98 static int p80211knetdev_init(netdevice_t *netdev);
  99 static struct net_device_stats *p80211knetdev_get_stats(netdevice_t *netdev);
 100 static int p80211knetdev_open(netdevice_t *netdev);
 101 static int p80211knetdev_stop(netdevice_t *netdev);
 102 static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
 103                                          netdevice_t *netdev);
 104 static void p80211knetdev_set_multicast_list(netdevice_t *dev);
 105 static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr,
 106                                   int cmd);
 107 static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr);
 108 static void p80211knetdev_tx_timeout(netdevice_t *netdev);
 109 static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc);
 110
 111 int wlan_watchdog = 5000;
 112 module_param(wlan_watchdog, int, 0644);
 113 MODULE_PARM_DESC(wlan_watchdog, "transmit timeout in milliseconds");
 114
 115 int wlan_wext_write = 1;
 116 module_param(wlan_wext_write, int, 0644);
 117 MODULE_PARM_DESC(wlan_wext_write, "enable write wireless extensions");
 118
 119 /*----------------------------------------------------------------
 120 * p80211knetdev_init
 121 *
 122 * Init method for a Linux netdevice.  Called in response to
 123 * register_netdev.
 124 *
 125 * Arguments:
 126 *       none
 127 *
 128 * Returns:
 129 *       nothing
 130 ----------------------------------------------------------------*/
 131 static int p80211knetdev_init(netdevice_t *netdev)
 132 {
 133         /* Called in response to register_netdev */
 134         /* This is usually the probe function, but the probe has */
 135         /* already been done by the MSD and the create_kdev */
 136         /* function.  All we do here is return success */
 137         return 0;
 138 }
 139
 140 /*----------------------------------------------------------------
 141 * p80211knetdev_get_stats
 142 *
 143 * Statistics retrieval for linux netdevices.  Here we're reporting
 144 * the Linux i/f level statistics.  Hence, for the primary numbers,
 145 * we don't want to report the numbers from the MIB.  Eventually,
 146 * it might be useful to collect some of the error counters though.
 147 *
 148 * Arguments:
 149 *       netdev          Linux netdevice
 150 *
 151 * Returns:
 152 *       the address of the statistics structure
 153 ----------------------------------------------------------------*/
 154 static struct net_device_stats *p80211knetdev_get_stats(netdevice_t *netdev)
 155 {
 156         wlandevice_t *wlandev = netdev->ml_priv;
 157
 158         /* TODO: review the MIB stats for items that correspond to
 159            linux stats */
 160
 161         return &(wlandev->linux_stats);
 162 }
 163
 164 /*----------------------------------------------------------------
 165 * p80211knetdev_open
 166 *
 167 * Linux netdevice open method.  Following a successful call here,
 168 * the device is supposed to be ready for tx and rx.  In our
 169 * situation that may not be entirely true due to the state of the
 170 * MAC below.
 171 *
 172 * Arguments:
 173 *       netdev          Linux network device structure
 174 *
 175 * Returns:
 176 *       zero on success, non-zero otherwise
 177 ----------------------------------------------------------------*/
 178 static int p80211knetdev_open(netdevice_t *netdev)
 179 {
 180         int result = 0;         /* success */
 181         wlandevice_t *wlandev = netdev->ml_priv;
 182
 183         /* Check to make sure the MSD is running */
 184         if (wlandev->msdstate != WLAN_MSD_RUNNING)
 185                 return -ENODEV;
 186
 187         /* Tell the MSD to open */
 188         if (wlandev->open != NULL) {
 189                 result = wlandev->open(wlandev);
 190                 if (result == 0) {
 191                         netif_start_queue(wlandev->netdev);
 192                         wlandev->state = WLAN_DEVICE_OPEN;
 193                 }
 194         } else {
 195                 result = -EAGAIN;
 196         }
 197
 198         return result;
 199 }
 200
 201 /*----------------------------------------------------------------
 202 * p80211knetdev_stop
 203 *
 204 * Linux netdevice stop (close) method.  Following this call,
 205 * no frames should go up or down through this interface.
 206 *
 207 * Arguments:
 208 *       netdev          Linux network device structure
 209 *
 210 * Returns:
 211 *       zero on success, non-zero otherwise
 212 ----------------------------------------------------------------*/
 213 static int p80211knetdev_stop(netdevice_t *netdev)
 214 {
 215         int result = 0;
 216         wlandevice_t *wlandev = netdev->ml_priv;
 217
 218         if (wlandev->close != NULL)
 219                 result = wlandev->close(wlandev);
 220
 221         netif_stop_queue(wlandev->netdev);
 222         wlandev->state = WLAN_DEVICE_CLOSED;
 223
 224         return result;
 225 }
 226
 227 /*----------------------------------------------------------------
 228 * p80211netdev_rx
 229 *
 230 * Frame receive function called by the mac specific driver.
 231 *
 232 * Arguments:
 233 *       wlandev         WLAN network device structure
 234 *       skb             skbuff containing a full 802.11 frame.
 235 * Returns:
 236 *       nothing
 237 * Side effects:
 238 *
 239 ----------------------------------------------------------------*/
 240 void p80211netdev_rx(wlandevice_t *wlandev, struct sk_buff *skb)
 241 {
 242         /* Enqueue for post-irq processing */
 243         skb_queue_tail(&wlandev->nsd_rxq, skb);
 244
 245         tasklet_schedule(&wlandev->rx_bh);
 246
 247         return;
 248 }
 249
 250 /*----------------------------------------------------------------
 251 * p80211netdev_rx_bh
 252 *
 253 * Deferred processing of all received frames.
 254 *
 255 * Arguments:
 256 *       wlandev         WLAN network device structure
 257 *       skb             skbuff containing a full 802.11 frame.
 258 * Returns:
 259 *       nothing
 260 * Side effects:
 261 *
 262 ----------------------------------------------------------------*/
 263 static void p80211netdev_rx_bh(unsigned long arg)
 264 {
 265         wlandevice_t *wlandev = (wlandevice_t *) arg;
 266         struct sk_buff *skb = NULL;
 267         netdevice_t *dev = wlandev->netdev;
 268         p80211_hdr_a3_t *hdr;
 269         u16 fc;
 270
 271         /* Let's empty our our queue */
 272         while ((skb = skb_dequeue(&wlandev->nsd_rxq))) {
 273                 if (wlandev->state == WLAN_DEVICE_OPEN) {
 274
 275                         if (dev->type != ARPHRD_ETHER) {
 276                                 /* RAW frame; we shouldn't convert it */
 277                                 /* XXX Append the Prism Header here instead. */
 278
 279                                 /* set up various data fields */
 280                                 skb->dev = dev;
 281                                 skb_reset_mac_header(skb);
 282                                 skb->ip_summed = CHECKSUM_NONE;
 283                                 skb->pkt_type = PACKET_OTHERHOST;
 284                                 skb->protocol = htons(ETH_P_80211_RAW);
 285                                 dev->last_rx = jiffies;
 286
 287                                 wlandev->linux_stats.rx_packets++;
 288                                 wlandev->linux_stats.rx_bytes += skb->len;
 289                                 netif_rx_ni(skb);
 290                                 continue;
 291                         } else {
 292                                 hdr = (p80211_hdr_a3_t *) skb->data;
 293                                 fc = le16_to_cpu(hdr->fc);
 294                                 if (p80211_rx_typedrop(wlandev, fc)) {
 295                                         dev_kfree_skb(skb);
 296                                         continue;
 297                                 }
 298
 299                                 /* perform mcast filtering */
 300                                 if (wlandev->netdev->flags & IFF_ALLMULTI) {
 301                                         /* allow my local address through */
 302                                         if (memcmp
 303                                             (hdr->a1, wlandev->netdev->dev_addr,
 304                                              ETH_ALEN) != 0) {
 305                                                 /* but reject anything else that isn't multicast */
 306                                                 if (!(hdr->a1[0] & 0x01)) {
 307                                                         dev_kfree_skb(skb);
 308                                                         continue;
 309                                                 }
 310                                         }
 311                                 }
 312
 313                                 if (skb_p80211_to_ether
 314                                     (wlandev, wlandev->ethconv, skb) == 0) {
 315                                         skb->dev->last_rx = jiffies;
 316                                         wlandev->linux_stats.rx_packets++;
 317                                         wlandev->linux_stats.rx_bytes +=
 318                                             skb->len;
 319                                         netif_rx_ni(skb);
 320                                         continue;
 321                                 }
 322                                 pr_debug("p80211_to_ether failed.\n");
 323                         }
 324                 }
 325                 dev_kfree_skb(skb);
 326         }
 327 }
 328
 329 /*----------------------------------------------------------------
 330 * p80211knetdev_hard_start_xmit
 331 *
 332 * Linux netdevice method for transmitting a frame.
 333 *
 334 * Arguments:
 335 *       skb     Linux sk_buff containing the frame.
 336 *       netdev  Linux netdevice.
 337 *
 338 * Side effects:
 339 *       If the lower layers report that buffers are full. netdev->tbusy
 340 *       will be set to prevent higher layers from sending more traffic.
 341 *
 342 *       Note: If this function returns non-zero, higher layers retain
 343 *             ownership of the skb.
 344 *
 345 * Returns:
 346 *       zero on success, non-zero on failure.
 347 ----------------------------------------------------------------*/
 348 static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
 349                                          netdevice_t *netdev)
 350 {
 351         int result = 0;
 352         int txresult = -1;
 353         wlandevice_t *wlandev = netdev->ml_priv;
 354         p80211_hdr_t p80211_hdr;
 355         p80211_metawep_t p80211_wep;
 356
 357         if (skb == NULL)
 358                 return 0;
 359
 360         if (wlandev->state != WLAN_DEVICE_OPEN) {
 361                 result = 1;
 362                 goto failed;
 363         }
 364
 365         memset(&p80211_hdr, 0, sizeof(p80211_hdr_t));
 366         memset(&p80211_wep, 0, sizeof(p80211_metawep_t));
 367
 368         if (netif_queue_stopped(netdev)) {
 369                 pr_debug("called when queue stopped.\n");
 370                 result = 1;
 371                 goto failed;
 372         }
 373
 374         netif_stop_queue(netdev);
 375
 376         /* Check to see that a valid mode is set */
 377         switch (wlandev->macmode) {
 378         case WLAN_MACMODE_IBSS_STA:
 379         case WLAN_MACMODE_ESS_STA:
 380         case WLAN_MACMODE_ESS_AP:
 381                 break;
 382         default:
 383                 /* Mode isn't set yet, just drop the frame
 384                  * and return success .
 385                  * TODO: we need a saner way to handle this
 386                  */
 387                 if (skb->protocol != ETH_P_80211_RAW) {
 388                         netif_start_queue(wlandev->netdev);
 389                         printk(KERN_NOTICE
 390                                "Tx attempt prior to association, frame dropped.\n");
 391                         wlandev->linux_stats.tx_dropped++;
 392                         result = 0;
 393                         goto failed;
 394                 }
 395                 break;
 396         }
 397
 398         /* Check for raw transmits */
 399         if (skb->protocol == ETH_P_80211_RAW) {
 400                 if (!capable(CAP_NET_ADMIN)) {
 401                         result = 1;
 402                         goto failed;
 403                 }
 404                 /* move the header over */
 405                 memcpy(&p80211_hdr, skb->data, sizeof(p80211_hdr_t));
 406                 skb_pull(skb, sizeof(p80211_hdr_t));
 407         } else {
 408                 if (skb_ether_to_p80211
 409                     (wlandev, wlandev->ethconv, skb, &p80211_hdr,
 410                      &p80211_wep) != 0) {
 411                         /* convert failed */
 412                         pr_debug("ether_to_80211(%d) failed.\n",
 413                                wlandev->ethconv);
 414                         result = 1;
 415                         goto failed;
 416                 }
 417         }
 418         if (wlandev->txframe == NULL) {
 419                 result = 1;
 420                 goto failed;
 421         }
 422
 423         netdev->trans_start = jiffies;
 424
 425         wlandev->linux_stats.tx_packets++;
 426         /* count only the packet payload */
 427         wlandev->linux_stats.tx_bytes += skb->len;
 428
 429         txresult = wlandev->txframe(wlandev, skb, &p80211_hdr, &p80211_wep);
 430
 431         if (txresult == 0) {
 432                 /* success and more buf */
 433                 /* avail, re: hw_txdata */
 434                 netif_wake_queue(wlandev->netdev);
 435                 result = 0;
 436         } else if (txresult == 1) {
 437                 /* success, no more avail */
 438                 pr_debug("txframe success, no more bufs\n");
 439                 /* netdev->tbusy = 1;  don't set here, irqhdlr */
 440                 /*   may have already cleared it */
 441                 result = 0;
 442         } else if (txresult == 2) {
 443                 /* alloc failure, drop frame */
 444                 pr_debug("txframe returned alloc_fail\n");
 445                 result = 1;
 446         } else {
 447                 /* buffer full or queue busy, drop frame. */
 448                 pr_debug("txframe returned full or busy\n");
 449                 result = 1;
 450         }
 451
 452 failed:
 453         /* Free up the WEP buffer if it's not the same as the skb */
 454         if ((p80211_wep.data) && (p80211_wep.data != skb->data))
 455                 kfree(p80211_wep.data);
 456
 457         /* we always free the skb here, never in a lower level. */
 458         if (!result)
 459                 dev_kfree_skb(skb);
 460
 461         return result;
 462 }
 463
 464 /*----------------------------------------------------------------
 465 * p80211knetdev_set_multicast_list
 466 *
 467 * Called from higher lavers whenever there's a need to set/clear
 468 * promiscuous mode or rewrite the multicast list.
 469 *
 470 * Arguments:
 471 *       none
 472 *
 473 * Returns:
 474 *       nothing
 475 ----------------------------------------------------------------*/
 476 static void p80211knetdev_set_multicast_list(netdevice_t *dev)
 477 {
 478         wlandevice_t *wlandev = dev->ml_priv;
 479
 480         /* TODO:  real multicast support as well */
 481
 482         if (wlandev->set_multicast_list)
 483                 wlandev->set_multicast_list(wlandev, dev);
 484
 485 }
 486
 487 #ifdef SIOCETHTOOL
 488
 489 static int p80211netdev_ethtool(wlandevice_t *wlandev, void __user *useraddr)
 490 {
 491         u32 ethcmd;
 492         struct ethtool_drvinfo info;
 493         struct ethtool_value edata;
 494
 495         memset(&info, 0, sizeof(info));
 496         memset(&edata, 0, sizeof(edata));
 497
 498         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
 499                 return -EFAULT;
 500
 501         switch (ethcmd) {
 502         case ETHTOOL_GDRVINFO:
 503                 info.cmd = ethcmd;
 504                 snprintf(info.driver, sizeof(info.driver), "p80211_%s",
 505                          wlandev->nsdname);
 506                 snprintf(info.version, sizeof(info.version), "%s",
 507                          WLAN_RELEASE);
 508
 509                 if (copy_to_user(useraddr, &info, sizeof(info)))
 510                         return -EFAULT;
 511                 return 0;
 512 #ifdef ETHTOOL_GLINK
 513         case ETHTOOL_GLINK:
 514                 edata.cmd = ethcmd;
 515
 516                 if (wlandev->linkstatus &&
 517                     (wlandev->macmode != WLAN_MACMODE_NONE)) {
 518                         edata.data = 1;
 519                 } else {
 520                         edata.data = 0;
 521                 }
 522
 523                 if (copy_to_user(useraddr, &edata, sizeof(edata)))
 524                         return -EFAULT;
 525                 return 0;
 526         }
 527 #endif
 528
 529         return -EOPNOTSUPP;
 530 }
 531
 532 #endif
 533
 534 /*----------------------------------------------------------------
 535 * p80211knetdev_do_ioctl
 536 *
 537 * Handle an ioctl call on one of our devices.  Everything Linux
 538 * ioctl specific is done here.  Then we pass the contents of the
 539 * ifr->data to the request message handler.
 540 *
 541 * Arguments:
 542 *       dev     Linux kernel netdevice
 543 *       ifr     Our private ioctl request structure, typed for the
 544 *               generic struct ifreq so we can use ptr to func
 545 *               w/o cast.
 546 *
 547 * Returns:
 548 *       zero on success, a negative errno on failure.  Possible values:
 549 *               -ENETDOWN Device isn't up.
 550 *               -EBUSY  cmd already in progress
 551 *               -ETIME  p80211 cmd timed out (MSD may have its own timers)
 552 *               -EFAULT memory fault copying msg from user buffer
 553 *               -ENOMEM unable to allocate kernel msg buffer
 554 *               -ENOSYS bad magic, it the cmd really for us?
 555 *               -EintR  sleeping on cmd, awakened by signal, cmd cancelled.
 556 *
 557 * Call Context:
 558 *       Process thread (ioctl caller).  TODO: SMP support may require
 559 *       locks.
 560 ----------------------------------------------------------------*/
 561 static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr, int cmd)
 562 {
 563         int result = 0;
 564         p80211ioctl_req_t *req = (p80211ioctl_req_t *) ifr;
 565         wlandevice_t *wlandev = dev->ml_priv;
 566         u8 *msgbuf;
 567
 568         pr_debug("rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len);
 569
 570 #ifdef SIOCETHTOOL
 571         if (cmd == SIOCETHTOOL) {
 572                 result =
 573                     p80211netdev_ethtool(wlandev, (void __user *)ifr->ifr_data);
 574                 goto bail;
 575         }
 576 #endif
 577
 578         /* Test the magic, assume ifr is good if it's there */
 579         if (req->magic != P80211_IOCTL_MAGIC) {
 580                 result = -ENOSYS;
 581                 goto bail;
 582         }
 583
 584         if (cmd == P80211_IFTEST) {
 585                 result = 0;
 586                 goto bail;
 587         } else if (cmd != P80211_IFREQ) {
 588                 result = -ENOSYS;
 589                 goto bail;
 590         }
 591
 592         /* Allocate a buf of size req->len */
 593         if ((msgbuf = kmalloc(req->len, GFP_KERNEL))) {
 594                 if (copy_from_user(msgbuf, (void __user *)req->data, req->len))
 595                         result = -EFAULT;
 596                 else
 597                         result = p80211req_dorequest(wlandev, msgbuf);
 598
 599                 if (result == 0) {
 600                         if (copy_to_user
 601                             ((void __user *)req->data, msgbuf, req->len)) {
 602                                 result = -EFAULT;
 603                         }
 604                 }
 605                 kfree(msgbuf);
 606         } else {
 607                 result = -ENOMEM;
 608         }
 609 bail:
 610         return result;          /* If allocate,copyfrom or copyto fails, return errno */
 611 }
 612
 613 /*----------------------------------------------------------------
 614 * p80211knetdev_set_mac_address
 615 *
 616 * Handles the ioctl for changing the MACAddress of a netdevice
 617 *
 618 * references: linux/netdevice.h and drivers/net/net_init.c
 619 *
 620 * NOTE: [MSM] We only prevent address changes when the netdev is
 621 * up.  We don't control anything based on dot11 state.  If the
 622 * address is changed on a STA that's currently associated, you
 623 * will probably lose the ability to send and receive data frames.
 624 * Just be aware.  Therefore, this should usually only be done
 625 * prior to scan/join/auth/assoc.
 626 *
 627 * Arguments:
 628 *       dev     netdevice struct
 629 *       addr    the new MACAddress (a struct)
 630 *
 631 * Returns:
 632 *       zero on success, a negative errno on failure.  Possible values:
 633 *               -EBUSY  device is bussy (cmd not possible)
 634 *               -and errors returned by: p80211req_dorequest(..)
 635 *
 636 * by: Collin R. Mulliner <collin@mulliner.org>
 637 ----------------------------------------------------------------*/
 638 static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr)
 639 {
 640         struct sockaddr *new_addr = addr;
 641         p80211msg_dot11req_mibset_t dot11req;
 642         p80211item_unk392_t *mibattr;
 643         p80211item_pstr6_t *macaddr;
 644         p80211item_uint32_t *resultcode;
 645         int result = 0;
 646
 647         /* If we're running, we don't allow MAC address changes */
 648         if (netif_running(dev))
 649                 return -EBUSY;
 650
 651         /* Set up some convenience pointers. */
 652         mibattr = &dot11req.mibattribute;
 653         macaddr = (p80211item_pstr6_t *)&mibattr->data;
 654         resultcode = &dot11req.resultcode;
 655
 656         /* Set up a dot11req_mibset */
 657         memset(&dot11req, 0, sizeof(p80211msg_dot11req_mibset_t));
 658         dot11req.msgcode = DIDmsg_dot11req_mibset;
 659         dot11req.msglen = sizeof(p80211msg_dot11req_mibset_t);
 660         memcpy(dot11req.devname,
 661                ((wlandevice_t *) dev->ml_priv)->name, WLAN_DEVNAMELEN_MAX - 1);
 662
 663         /* Set up the mibattribute argument */
 664         mibattr->did = DIDmsg_dot11req_mibset_mibattribute;
 665         mibattr->status = P80211ENUM_msgitem_status_data_ok;
 666         mibattr->len = sizeof(mibattr->data);
 667
 668         macaddr->did = DIDmib_dot11mac_dot11OperationTable_dot11MACAddress;
 669         macaddr->status = P80211ENUM_msgitem_status_data_ok;
 670         macaddr->len = sizeof(macaddr->data);
 671         macaddr->data.len = ETH_ALEN;
 672         memcpy(&macaddr->data.data, new_addr->sa_data, ETH_ALEN);
 673
 674         /* Set up the resultcode argument */
 675         resultcode->did = DIDmsg_dot11req_mibset_resultcode;
 676         resultcode->status = P80211ENUM_msgitem_status_no_value;
 677         resultcode->len = sizeof(resultcode->data);
 678         resultcode->data = 0;
 679
 680         /* now fire the request */
 681         result = p80211req_dorequest(dev->ml_priv, (u8 *)&dot11req);
 682
 683         /* If the request wasn't successful, report an error and don't
 684          * change the netdev address
 685          */
 686         if (result != 0 || resultcode->data != P80211ENUM_resultcode_success) {
 687                 printk(KERN_ERR
 688                        "Low-level driver failed dot11req_mibset(dot11MACAddress).\n");
 689                 result = -EADDRNOTAVAIL;
 690         } else {
 691                 /* everything's ok, change the addr in netdev */
 692                 memcpy(dev->dev_addr, new_addr->sa_data, dev->addr_len);
 693         }
 694
 695         return result;
 696 }
 697
 698 static int wlan_change_mtu(netdevice_t *dev, int new_mtu)
 699 {
 700         /* 2312 is max 802.11 payload, 20 is overhead, (ether + llc +snap)
 701            and another 8 for wep. */
 702         if ((new_mtu < 68) || (new_mtu > (2312 - 20 - 8)))
 703                 return -EINVAL;
 704
 705         dev->mtu = new_mtu;
 706
 707         return 0;
 708 }
 709
 710 /*----------------------------------------------------------------
 711 * wlan_setup
 712 *
 713 * Roughly matches the functionality of ether_setup.  Here
 714 * we set up any members of the wlandevice structure that are common
 715 * to all devices.  Additionally, we allocate a linux 'struct device'
 716 * and perform the same setup as ether_setup.
 717 *
 718 * Note: It's important that the caller have setup the wlandev->name
 719 *       ptr prior to calling this function.
 720 *
 721 * Arguments:
 722 *       wlandev         ptr to the wlandev structure for the
 723 *                       interface.
 724 * Returns:
 725 *       zero on success, non-zero otherwise.
 726 * Call Context:
 727 *       Should be process thread.  We'll assume it might be
 728 *       interrupt though.  When we add support for statically
 729 *       compiled drivers, this function will be called in the
 730 *       context of the kernel startup code.
 731 ----------------------------------------------------------------*/
 732 int wlan_setup(wlandevice_t *wlandev)
 733 {
 734         int result = 0;
 735         netdevice_t *dev;
 736
 737         /* Set up the wlandev */
 738         wlandev->state = WLAN_DEVICE_CLOSED;
 739         wlandev->ethconv = WLAN_ETHCONV_8021h;
 740         wlandev->macmode = WLAN_MACMODE_NONE;
 741
 742         /* Set up the rx queue */
 743         skb_queue_head_init(&wlandev->nsd_rxq);
 744         tasklet_init(&wlandev->rx_bh,
 745                      p80211netdev_rx_bh, (unsigned long)wlandev);
 746
 747         /* Allocate and initialize the struct device */
 748         dev = alloc_netdev(0, "wlan%d", ether_setup);
 749         if (dev == NULL) {
 750                 printk(KERN_ERR "Failed to alloc netdev.\n");
 751                 result = 1;
 752         } else {
 753                 wlandev->netdev = dev;
 754                 dev->ml_priv = wlandev;
 755                 dev->hard_start_xmit = p80211knetdev_hard_start_xmit;
 756                 dev->get_stats = p80211knetdev_get_stats;
 757                 dev->init = p80211knetdev_init;
 758                 dev->open = p80211knetdev_open;
 759                 dev->stop = p80211knetdev_stop;
 760
 761 #if (WIRELESS_EXT < 21)
 762                 dev->get_wireless_stats = p80211wext_get_wireless_stats;
 763 #endif
 764                 dev->wireless_handlers = &p80211wext_handler_def;
 765
 766                 netif_stop_queue(dev);
 767                 netif_carrier_off(dev);
 768         }
 769
 770         return result;
 771 }
 772
 773 /*----------------------------------------------------------------
 774 * wlan_unsetup
 775 *
 776 * This function is paired with the wlan_setup routine.  It should
 777 * be called after unregister_wlandev.  Basically, all it does is
 778 * free the 'struct device' that's associated with the wlandev.
 779 * We do it here because the 'struct device' isn't allocated
 780 * explicitly in the driver code, it's done in wlan_setup.  To
 781 * do the free in the driver might seem like 'magic'.
 782 *
 783 * Arguments:
 784 *       wlandev         ptr to the wlandev structure for the
 785 *                       interface.
 786 * Returns:
 787 *       zero on success, non-zero otherwise.
 788 * Call Context:
 789 *       Should be process thread.  We'll assume it might be
 790 *       interrupt though.  When we add support for statically
 791 *       compiled drivers, this function will be called in the
 792 *       context of the kernel startup code.
 793 ----------------------------------------------------------------*/
 794 int wlan_unsetup(wlandevice_t *wlandev)
 795 {
 796         int result = 0;
 797
 798         tasklet_kill(&wlandev->rx_bh);
 799
 800         if (wlandev->netdev == NULL) {
 801                 printk(KERN_ERR "called without wlandev->netdev set.\n");
 802                 result = 1;
 803         } else {
 804                 free_netdev(wlandev->netdev);
 805                 wlandev->netdev = NULL;
 806         }
 807
 808         return 0;
 809 }
 810
 811 /*----------------------------------------------------------------
 812 * register_wlandev
 813 *
 814 * Roughly matches the functionality of register_netdev.  This function
 815 * is called after the driver has successfully probed and set up the
 816 * resources for the device.  It's now ready to become a named device
 817 * in the Linux system.
 818 *
 819 * First we allocate a name for the device (if not already set), then
 820 * we call the Linux function register_netdevice.
 821 *
 822 * Arguments:
 823 *       wlandev         ptr to the wlandev structure for the
 824 *                       interface.
 825 * Returns:
 826 *       zero on success, non-zero otherwise.
 827 * Call Context:
 828 *       Can be either interrupt or not.
 829 ----------------------------------------------------------------*/
 830 int register_wlandev(wlandevice_t *wlandev)
 831 {
 832         int i = 0;
 833
 834         i = register_netdev(wlandev->netdev);
 835         if (i)
 836                 return i;
 837
 838         return 0;
 839 }
 840
 841 /*----------------------------------------------------------------
 842 * unregister_wlandev
 843 *
 844 * Roughly matches the functionality of unregister_netdev.  This
 845 * function is called to remove a named device from the system.
 846 *
 847 * First we tell linux that the device should no longer exist.
 848 * Then we remove it from the list of known wlan devices.
 849 *
 850 * Arguments:
 851 *       wlandev         ptr to the wlandev structure for the
 852 *                       interface.
 853 * Returns:
 854 *       zero on success, non-zero otherwise.
 855 * Call Context:
 856 *       Can be either interrupt or not.
 857 ----------------------------------------------------------------*/
 858 int unregister_wlandev(wlandevice_t *wlandev)
 859 {
 860         struct sk_buff *skb;
 861
 862         unregister_netdev(wlandev->netdev);
 863
 864         /* Now to clean out the rx queue */
 865         while ((skb = skb_dequeue(&wlandev->nsd_rxq)))
 866                 dev_kfree_skb(skb);
 867
 868         return 0;
 869 }
 870
 871 /*----------------------------------------------------------------
 872 * p80211netdev_hwremoved
 873 *
 874 * Hardware removed notification. This function should be called
 875 * immediately after an MSD has detected that the underlying hardware
 876 * has been yanked out from under us.  The primary things we need
 877 * to do are:
 878 *   - Mark the wlandev
 879 *   - Prevent any further traffic from the knetdev i/f
 880 *   - Prevent any further requests from mgmt i/f
 881 *   - If there are any waitq'd mgmt requests or mgmt-frame exchanges,
 882 *     shut them down.
 883 *   - Call the MSD hwremoved function.
 884 *
 885 * The remainder of the cleanup will be handled by unregister().
 886 * Our primary goal here is to prevent as much tickling of the MSD
 887 * as possible since the MSD is already in a 'wounded' state.
 888 *
 889 * TODO: As new features are added, this function should be
 890 *       updated.
 891 *
 892 * Arguments:
 893 *       wlandev         WLAN network device structure
 894 * Returns:
 895 *       nothing
 896 * Side effects:
 897 *
 898 * Call context:
 899 *       Usually interrupt.
 900 ----------------------------------------------------------------*/
 901 void p80211netdev_hwremoved(wlandevice_t *wlandev)
 902 {
 903         wlandev->hwremoved = 1;
 904         if (wlandev->state == WLAN_DEVICE_OPEN)
 905                 netif_stop_queue(wlandev->netdev);
 906
 907         netif_device_detach(wlandev->netdev);
 908 }
 909
 910 /*----------------------------------------------------------------
 911 * p80211_rx_typedrop
 912 *
 913 * Classifies the frame, increments the appropriate counter, and
 914 * returns 0|1|2 indicating whether the driver should handle, ignore, or
 915 * drop the frame
 916 *
 917 * Arguments:
 918 *       wlandev         wlan device structure
 919 *       fc              frame control field
 920 *
 921 * Returns:
 922 *       zero if the frame should be handled by the driver,
 923 *       one if the frame should be ignored
 924 *       anything else means we drop it.
 925 *
 926 * Side effects:
 927 *
 928 * Call context:
 929 *       interrupt
 930 ----------------------------------------------------------------*/
 931 static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc)
 932 {
 933         u16 ftype;
 934         u16 fstype;
 935         int drop = 0;
 936         /* Classify frame, increment counter */
 937         ftype = WLAN_GET_FC_FTYPE(fc);
 938         fstype = WLAN_GET_FC_FSTYPE(fc);
 939 #if 0
 940         pr_debug("rx_typedrop : ftype=%d fstype=%d.\n", ftype, fstype);
 941 #endif
 942         switch (ftype) {
 943         case WLAN_FTYPE_MGMT:
 944                 if ((wlandev->netdev->flags & IFF_PROMISC) ||
 945                     (wlandev->netdev->flags & IFF_ALLMULTI)) {
 946                         drop = 1;
 947                         break;
 948                 }
 949                 pr_debug("rx'd mgmt:\n");
 950                 wlandev->rx.mgmt++;
 951                 switch (fstype) {
 952                 case WLAN_FSTYPE_ASSOCREQ:
 953                         /* printk("assocreq"); */
 954                         wlandev->rx.assocreq++;
 955                         break;
 956                 case WLAN_FSTYPE_ASSOCRESP:
 957                         /* printk("assocresp"); */
 958                         wlandev->rx.assocresp++;
 959                         break;
 960                 case WLAN_FSTYPE_REASSOCREQ:
 961                         /* printk("reassocreq"); */
 962                         wlandev->rx.reassocreq++;
 963                         break;
 964                 case WLAN_FSTYPE_REASSOCRESP:
 965                         /* printk("reassocresp"); */
 966                         wlandev->rx.reassocresp++;
 967                         break;
 968                 case WLAN_FSTYPE_PROBEREQ:
 969                         /* printk("probereq"); */
 970                         wlandev->rx.probereq++;
 971                         break;
 972                 case WLAN_FSTYPE_PROBERESP:
 973                         /* printk("proberesp"); */
 974                         wlandev->rx.proberesp++;
 975                         break;
 976                 case WLAN_FSTYPE_BEACON:
 977                         /* printk("beacon"); */
 978                         wlandev->rx.beacon++;
 979                         break;
 980                 case WLAN_FSTYPE_ATIM:
 981                         /* printk("atim"); */
 982                         wlandev->rx.atim++;
 983                         break;
 984                 case WLAN_FSTYPE_DISASSOC:
 985                         /* printk("disassoc"); */
 986                         wlandev->rx.disassoc++;
 987                         break;
 988                 case WLAN_FSTYPE_AUTHEN:
 989                         /* printk("authen"); */
 990                         wlandev->rx.authen++;
 991                         break;
 992                 case WLAN_FSTYPE_DEAUTHEN:
 993                         /* printk("deauthen"); */
 994                         wlandev->rx.deauthen++;
 995                         break;
 996                 default:
 997                         /* printk("unknown"); */
 998                         wlandev->rx.mgmt_unknown++;
 999                         break;
1000                 }
1001                 /* printk("\n"); */
1002                 drop = 2;
1003                 break;
1004
1005         case WLAN_FTYPE_CTL:
1006                 if ((wlandev->netdev->flags & IFF_PROMISC) ||
1007                     (wlandev->netdev->flags & IFF_ALLMULTI)) {
1008                         drop = 1;
1009                         break;
1010                 }
1011                 pr_debug("rx'd ctl:\n");
1012                 wlandev->rx.ctl++;
1013                 switch (fstype) {
1014                 case WLAN_FSTYPE_PSPOLL:
1015                         /* printk("pspoll"); */
1016                         wlandev->rx.pspoll++;
1017                         break;
1018                 case WLAN_FSTYPE_RTS:
1019                         /* printk("rts"); */
1020                         wlandev->rx.rts++;
1021                         break;
1022                 case WLAN_FSTYPE_CTS:
1023                         /* printk("cts"); */
1024                         wlandev->rx.cts++;
1025                         break;
1026                 case WLAN_FSTYPE_ACK:
1027                         /* printk("ack"); */
1028                         wlandev->rx.ack++;
1029                         break;
1030                 case WLAN_FSTYPE_CFEND:
1031                         /* printk("cfend"); */
1032                         wlandev->rx.cfend++;
1033                         break;
1034                 case WLAN_FSTYPE_CFENDCFACK:
1035                         /* printk("cfendcfack"); */
1036                         wlandev->rx.cfendcfack++;
1037                         break;
1038                 default:
1039                         /* printk("unknown"); */
1040                         wlandev->rx.ctl_unknown++;
1041                         break;
1042                 }
1043                 /* printk("\n"); */
1044                 drop = 2;
1045                 break;
1046
1047         case WLAN_FTYPE_DATA:
1048                 wlandev->rx.data++;
1049                 switch (fstype) {
1050                 case WLAN_FSTYPE_DATAONLY:
1051                         wlandev->rx.dataonly++;
1052                         break;
1053                 case WLAN_FSTYPE_DATA_CFACK:
1054                         wlandev->rx.data_cfack++;
1055                         break;
1056                 case WLAN_FSTYPE_DATA_CFPOLL:
1057                         wlandev->rx.data_cfpoll++;
1058                         break;
1059                 case WLAN_FSTYPE_DATA_CFACK_CFPOLL:
1060                         wlandev->rx.data__cfack_cfpoll++;
1061                         break;
1062                 case WLAN_FSTYPE_NULL:
1063                         pr_debug("rx'd data:null\n");
1064                         wlandev->rx.null++;
1065                         break;
1066                 case WLAN_FSTYPE_CFACK:
1067                         pr_debug("rx'd data:cfack\n");
1068                         wlandev->rx.cfack++;
1069                         break;
1070                 case WLAN_FSTYPE_CFPOLL:
1071                         pr_debug("rx'd data:cfpoll\n");
1072                         wlandev->rx.cfpoll++;
1073                         break;
1074                 case WLAN_FSTYPE_CFACK_CFPOLL:
1075                         pr_debug("rx'd data:cfack_cfpoll\n");
1076                         wlandev->rx.cfack_cfpoll++;
1077                         break;
1078                 default:
1079                         /* printk("unknown"); */
1080                         wlandev->rx.data_unknown++;
1081                         break;
1082                 }
1083
1084                 break;
1085         }
1086         return drop;
1087 }
1088
1089 static void p80211knetdev_tx_timeout(netdevice_t *netdev)
1090 {
1091         wlandevice_t *wlandev = netdev->ml_priv;
1092
1093         if (wlandev->tx_timeout) {
1094                 wlandev->tx_timeout(wlandev);
1095         } else {
1096                 printk(KERN_WARNING "Implement tx_timeout for %s\n",
1097                        wlandev->nsdname);
1098                 netif_wake_queue(wlandev->netdev);
1099         }
1100 }