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/module.h>
  53 #include <linux/kernel.h>
  54 #include <linux/sched.h>
  55 #include <linux/types.h>
  56 #include <linux/skbuff.h>
  57 #include <linux/slab.h>
  58 #include <linux/proc_fs.h>
  59 #include <linux/interrupt.h>
  60 #include <linux/netdevice.h>
  61 #include <linux/kmod.h>
  62 #include <linux/if_arp.h>
  63 #include <linux/wireless.h>
  64 #include <linux/sockios.h>
  65 #include <linux/etherdevice.h>
  66 #include <linux/if_ether.h>
  67 #include <linux/byteorder/generic.h>
  68 #include <linux/bitops.h>
  69 #include <linux/uaccess.h>
  70 #include <asm/byteorder.h>
  71
  72 #ifdef SIOCETHTOOL
  73 #include <linux/ethtool.h>
  74 #endif
  75
  76 #include <net/iw_handler.h>
  77 #include <net/net_namespace.h>
  78 #include <net/cfg80211.h>
  79
  80 #include "p80211types.h"
  81 #include "p80211hdr.h"
  82 #include "p80211conv.h"
  83 #include "p80211mgmt.h"
  84 #include "p80211msg.h"
  85 #include "p80211netdev.h"
  86 #include "p80211ioctl.h"
  87 #include "p80211req.h"
  88 #include "p80211metastruct.h"
  89 #include "p80211metadef.h"
  90
  91 #include "cfg80211.c"
  92
  93 /* Support functions */
  94 static void p80211netdev_rx_bh(unsigned long arg);
  95
  96 /* netdevice method functions */
  97 static int p80211knetdev_init(netdevice_t *netdev);
  98 static struct net_device_stats *p80211knetdev_get_stats(netdevice_t *netdev);
  99 static int p80211knetdev_open(netdevice_t *netdev);
 100 static int p80211knetdev_stop(netdevice_t *netdev);
 101 static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
 102                                          netdevice_t *netdev);
 103 static void p80211knetdev_set_multicast_list(netdevice_t *dev);
 104 static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr,
 105                                   int cmd);
 106 static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr);
 107 static void p80211knetdev_tx_timeout(netdevice_t *netdev);
 108 static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc);
 109
 110 int wlan_watchdog = 5000;
 111 module_param(wlan_watchdog, int, 0644);
 112 MODULE_PARM_DESC(wlan_watchdog, "transmit timeout in milliseconds");
 113
 114 int wlan_wext_write = 1;
 115 module_param(wlan_wext_write, int, 0644);
 116 MODULE_PARM_DESC(wlan_wext_write, "enable write wireless extensions");
 117
 118 /*----------------------------------------------------------------
 119 * p80211knetdev_init
 120 *
 121 * Init method for a Linux netdevice.  Called in response to
 122 * register_netdev.
 123 *
 124 * Arguments:
 125 *       none
 126 *
 127 * Returns:
 128 *       nothing
 129 ----------------------------------------------------------------*/
 130 static int p80211knetdev_init(netdevice_t *netdev)
 131 {
 132         /* Called in response to register_netdev */
 133         /* This is usually the probe function, but the probe has */
 134         /* already been done by the MSD and the create_kdev */
 135         /* function.  All we do here is return success */
 136         return 0;
 137 }
 138
 139 /*----------------------------------------------------------------
 140 * p80211knetdev_get_stats
 141 *
 142 * Statistics retrieval for linux netdevices.  Here we're reporting
 143 * the Linux i/f level statistics.  Hence, for the primary numbers,
 144 * we don't want to report the numbers from the MIB.  Eventually,
 145 * it might be useful to collect some of the error counters though.
 146 *
 147 * Arguments:
 148 *       netdev          Linux netdevice
 149 *
 150 * Returns:
 151 *       the address of the statistics structure
 152 ----------------------------------------------------------------*/
 153 static struct net_device_stats *p80211knetdev_get_stats(netdevice_t * netdev)
 154 {
 155         wlandevice_t *wlandev = netdev->ml_priv;
 156
 157         /* TODO: review the MIB stats for items that correspond to
 158            linux stats */
 159
 160         return &(wlandev->linux_stats);
 161 }
 162
 163 /*----------------------------------------------------------------
 164 * p80211knetdev_open
 165 *
 166 * Linux netdevice open method.  Following a successful call here,
 167 * the device is supposed to be ready for tx and rx.  In our
 168 * situation that may not be entirely true due to the state of the
 169 * MAC below.
 170 *
 171 * Arguments:
 172 *       netdev          Linux network device structure
 173 *
 174 * Returns:
 175 *       zero on success, non-zero otherwise
 176 ----------------------------------------------------------------*/
 177 static int p80211knetdev_open(netdevice_t *netdev)
 178 {
 179         int result = 0;         /* success */
 180         wlandevice_t *wlandev = netdev->ml_priv;
 181
 182         /* Check to make sure the MSD is running */
 183         if (wlandev->msdstate != WLAN_MSD_RUNNING)
 184                 return -ENODEV;
 185
 186         /* Tell the MSD to open */
 187         if (wlandev->open != NULL) {
 188                 result = wlandev->open(wlandev);
 189                 if (result == 0) {
 190                         netif_start_queue(wlandev->netdev);
 191                         wlandev->state = WLAN_DEVICE_OPEN;
 192                 }
 193         } else {
 194                 result = -EAGAIN;
 195         }
 196
 197         return result;
 198 }
 199
 200 /*----------------------------------------------------------------
 201 * p80211knetdev_stop
 202 *
 203 * Linux netdevice stop (close) method.  Following this call,
 204 * no frames should go up or down through this interface.
 205 *
 206 * Arguments:
 207 *       netdev          Linux network device structure
 208 *
 209 * Returns:
 210 *       zero on success, non-zero otherwise
 211 ----------------------------------------------------------------*/
 212 static int p80211knetdev_stop(netdevice_t *netdev)
 213 {
 214         int result = 0;
 215         wlandevice_t *wlandev = netdev->ml_priv;
 216
 217         if (wlandev->close != NULL)
 218                 result = wlandev->close(wlandev);
 219
 220         netif_stop_queue(wlandev->netdev);
 221         wlandev->state = WLAN_DEVICE_CLOSED;
 222
 223         return result;
 224 }
 225
 226 /*----------------------------------------------------------------
 227 * p80211netdev_rx
 228 *
 229 * Frame receive function called by the mac specific driver.
 230 *
 231 * Arguments:
 232 *       wlandev         WLAN network device structure
 233 *       skb             skbuff containing a full 802.11 frame.
 234 * Returns:
 235 *       nothing
 236 * Side effects:
 237 *
 238 ----------------------------------------------------------------*/
 239 void p80211netdev_rx(wlandevice_t *wlandev, struct sk_buff *skb)
 240 {
 241         /* Enqueue for post-irq processing */
 242         skb_queue_tail(&wlandev->nsd_rxq, skb);
 243
 244         tasklet_schedule(&wlandev->rx_bh);
 245
 246         return;
 247 }
 248
 249 /*----------------------------------------------------------------
 250 * p80211netdev_rx_bh
 251 *
 252 * Deferred processing of all received frames.
 253 *
 254 * Arguments:
 255 *       wlandev         WLAN network device structure
 256 *       skb             skbuff containing a full 802.11 frame.
 257 * Returns:
 258 *       nothing
 259 * Side effects:
 260 *
 261 ----------------------------------------------------------------*/
 262 static void p80211netdev_rx_bh(unsigned long arg)
 263 {
 264         wlandevice_t *wlandev = (wlandevice_t *) arg;
 265         struct sk_buff *skb = NULL;
 266         netdevice_t *dev = wlandev->netdev;
 267         struct p80211_hdr_a3 *hdr;
 268         u16 fc;
 269
 270         /* Let's empty our our queue */
 271         while ((skb = skb_dequeue(&wlandev->nsd_rxq))) {
 272                 if (wlandev->state == WLAN_DEVICE_OPEN) {
 273
 274                         if (dev->type != ARPHRD_ETHER) {
 275                                 /* RAW frame; we shouldn't convert it */
 276                                 /* XXX Append the Prism Header here instead. */
 277
 278                                 /* set up various data fields */
 279                                 skb->dev = dev;
 280                                 skb_reset_mac_header(skb);
 281                                 skb->ip_summed = CHECKSUM_NONE;
 282                                 skb->pkt_type = PACKET_OTHERHOST;
 283                                 skb->protocol = htons(ETH_P_80211_RAW);
 284                                 dev->last_rx = jiffies;
 285
 286                                 wlandev->linux_stats.rx_packets++;
 287                                 wlandev->linux_stats.rx_bytes += skb->len;
 288                                 netif_rx_ni(skb);
 289                                 continue;
 290                         } else {
 291                                 hdr = (struct p80211_hdr_a3 *) skb->data;
 292                                 fc = le16_to_cpu(hdr->fc);
 293                                 if (p80211_rx_typedrop(wlandev, fc)) {
 294                                         dev_kfree_skb(skb);
 295                                         continue;
 296                                 }
 297
 298                                 /* perform mcast filtering */
 299                                 if (wlandev->netdev->flags & IFF_ALLMULTI) {
 300                                         /* allow my local address through */
 301                                         if (memcmp
 302                                             (hdr->a1, wlandev->netdev->dev_addr,
 303                                              ETH_ALEN) != 0) {
 304                                                 /* but reject anything else that
 305                                                    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         union p80211_hdr p80211_hdr;
 355         struct p80211_metawep p80211_wep;
 356
 357         if (skb == NULL)
 358                 return NETDEV_TX_OK;
 359
 360         if (wlandev->state != WLAN_DEVICE_OPEN) {
 361                 result = 1;
 362                 goto failed;
 363         }
 364
 365         memset(&p80211_hdr, 0, sizeof(union p80211_hdr));
 366         memset(&p80211_wep, 0, sizeof(struct p80211_metawep));
 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(union p80211_hdr));
 406                 skb_pull(skb, sizeof(union p80211_hdr));
 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 = NETDEV_TX_OK;
 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 = NETDEV_TX_OK;
 442         } else if (txresult == 2) {
 443                 /* alloc failure, drop frame */
 444                 pr_debug("txframe returned alloc_fail\n");
 445                 result = NETDEV_TX_BUSY;
 446         } else {
 447                 /* buffer full or queue busy, drop frame. */
 448                 pr_debug("txframe returned full or busy\n");
 449                 result = NETDEV_TX_BUSY;
 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                 kzfree(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 #endif
 527         }
 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         struct p80211ioctl_req *req = (struct p80211ioctl_req *) 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         msgbuf = kmalloc(req->len, GFP_KERNEL);
 594         if (msgbuf) {
 595                 if (copy_from_user(msgbuf, (void __user *)req->data, req->len))
 596                         result = -EFAULT;
 597                 else
 598                         result = p80211req_dorequest(wlandev, msgbuf);
 599
 600                 if (result == 0) {
 601                         if (copy_to_user
 602                             ((void __user *)req->data, msgbuf, req->len)) {
 603                                 result = -EFAULT;
 604                         }
 605                 }
 606                 kfree(msgbuf);
 607         } else {
 608                 result = -ENOMEM;
 609         }
 610 bail:
 611         /* If allocate,copyfrom or copyto fails, return errno */
 612         return result;
 613 }
 614
 615 /*----------------------------------------------------------------
 616 * p80211knetdev_set_mac_address
 617 *
 618 * Handles the ioctl for changing the MACAddress of a netdevice
 619 *
 620 * references: linux/netdevice.h and drivers/net/net_init.c
 621 *
 622 * NOTE: [MSM] We only prevent address changes when the netdev is
 623 * up.  We don't control anything based on dot11 state.  If the
 624 * address is changed on a STA that's currently associated, you
 625 * will probably lose the ability to send and receive data frames.
 626 * Just be aware.  Therefore, this should usually only be done
 627 * prior to scan/join/auth/assoc.
 628 *
 629 * Arguments:
 630 *       dev     netdevice struct
 631 *       addr    the new MACAddress (a struct)
 632 *
 633 * Returns:
 634 *       zero on success, a negative errno on failure.  Possible values:
 635 *               -EBUSY  device is bussy (cmd not possible)
 636 *               -and errors returned by: p80211req_dorequest(..)
 637 *
 638 * by: Collin R. Mulliner <collin@mulliner.org>
 639 ----------------------------------------------------------------*/
 640 static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr)
 641 {
 642         struct sockaddr *new_addr = addr;
 643         struct p80211msg_dot11req_mibset dot11req;
 644         p80211item_unk392_t *mibattr;
 645         p80211item_pstr6_t *macaddr;
 646         p80211item_uint32_t *resultcode;
 647         int result = 0;
 648
 649         /* If we're running, we don't allow MAC address changes */
 650         if (netif_running(dev))
 651                 return -EBUSY;
 652
 653         /* Set up some convenience pointers. */
 654         mibattr = &dot11req.mibattribute;
 655         macaddr = (p80211item_pstr6_t *) &mibattr->data;
 656         resultcode = &dot11req.resultcode;
 657
 658         /* Set up a dot11req_mibset */
 659         memset(&dot11req, 0, sizeof(struct p80211msg_dot11req_mibset));
 660         dot11req.msgcode = DIDmsg_dot11req_mibset;
 661         dot11req.msglen = sizeof(struct p80211msg_dot11req_mibset);
 662         memcpy(dot11req.devname,
 663                ((wlandevice_t *) dev->ml_priv)->name, WLAN_DEVNAMELEN_MAX - 1);
 664
 665         /* Set up the mibattribute argument */
 666         mibattr->did = DIDmsg_dot11req_mibset_mibattribute;
 667         mibattr->status = P80211ENUM_msgitem_status_data_ok;
 668         mibattr->len = sizeof(mibattr->data);
 669
 670         macaddr->did = DIDmib_dot11mac_dot11OperationTable_dot11MACAddress;
 671         macaddr->status = P80211ENUM_msgitem_status_data_ok;
 672         macaddr->len = sizeof(macaddr->data);
 673         macaddr->data.len = ETH_ALEN;
 674         memcpy(&macaddr->data.data, new_addr->sa_data, ETH_ALEN);
 675
 676         /* Set up the resultcode argument */
 677         resultcode->did = DIDmsg_dot11req_mibset_resultcode;
 678         resultcode->status = P80211ENUM_msgitem_status_no_value;
 679         resultcode->len = sizeof(resultcode->data);
 680         resultcode->data = 0;
 681
 682         /* now fire the request */
 683         result = p80211req_dorequest(dev->ml_priv, (u8 *) &dot11req);
 684
 685         /* If the request wasn't successful, report an error and don't
 686          * change the netdev address
 687          */
 688         if (result != 0 || resultcode->data != P80211ENUM_resultcode_success) {
 689                 printk(KERN_ERR
 690                        "Low-level driver failed dot11req_mibset(dot11MACAddress).\n");
 691                 result = -EADDRNOTAVAIL;
 692         } else {
 693                 /* everything's ok, change the addr in netdev */
 694                 memcpy(dev->dev_addr, new_addr->sa_data, dev->addr_len);
 695         }
 696
 697         return result;
 698 }
 699
 700 static int wlan_change_mtu(netdevice_t *dev, int new_mtu)
 701 {
 702         /* 2312 is max 802.11 payload, 20 is overhead, (ether + llc +snap)
 703            and another 8 for wep. */
 704         if ((new_mtu < 68) || (new_mtu > (2312 - 20 - 8)))
 705                 return -EINVAL;
 706
 707         dev->mtu = new_mtu;
 708
 709         return 0;
 710 }
 711
 712 static const struct net_device_ops p80211_netdev_ops = {
 713         .ndo_init = p80211knetdev_init,
 714         .ndo_open = p80211knetdev_open,
 715         .ndo_stop = p80211knetdev_stop,
 716         .ndo_get_stats = p80211knetdev_get_stats,
 717         .ndo_start_xmit = p80211knetdev_hard_start_xmit,
 718         .ndo_set_rx_mode = p80211knetdev_set_multicast_list,
 719         .ndo_do_ioctl = p80211knetdev_do_ioctl,
 720         .ndo_set_mac_address = p80211knetdev_set_mac_address,
 721         .ndo_tx_timeout = p80211knetdev_tx_timeout,
 722         .ndo_change_mtu = wlan_change_mtu,
 723         .ndo_validate_addr = eth_validate_addr,
 724 };
 725
 726 /*----------------------------------------------------------------
 727 * wlan_setup
 728 *
 729 * Roughly matches the functionality of ether_setup.  Here
 730 * we set up any members of the wlandevice structure that are common
 731 * to all devices.  Additionally, we allocate a linux 'struct device'
 732 * and perform the same setup as ether_setup.
 733 *
 734 * Note: It's important that the caller have setup the wlandev->name
 735 *       ptr prior to calling this function.
 736 *
 737 * Arguments:
 738 *       wlandev         ptr to the wlandev structure for the
 739 *                       interface.
 740 *       physdev         ptr to usb device
 741 * Returns:
 742 *       zero on success, non-zero otherwise.
 743 * Call Context:
 744 *       Should be process thread.  We'll assume it might be
 745 *       interrupt though.  When we add support for statically
 746 *       compiled drivers, this function will be called in the
 747 *       context of the kernel startup code.
 748 ----------------------------------------------------------------*/
 749 int wlan_setup(wlandevice_t *wlandev, struct device *physdev)
 750 {
 751         int result = 0;
 752         netdevice_t *netdev;
 753         struct wiphy *wiphy;
 754         struct wireless_dev *wdev;
 755
 756         /* Set up the wlandev */
 757         wlandev->state = WLAN_DEVICE_CLOSED;
 758         wlandev->ethconv = WLAN_ETHCONV_8021h;
 759         wlandev->macmode = WLAN_MACMODE_NONE;
 760
 761         /* Set up the rx queue */
 762         skb_queue_head_init(&wlandev->nsd_rxq);
 763         tasklet_init(&wlandev->rx_bh,
 764                      p80211netdev_rx_bh, (unsigned long)wlandev);
 765
 766         /* Allocate and initialize the wiphy struct */
 767         wiphy = wlan_create_wiphy(physdev, wlandev);
 768         if (wiphy == NULL) {
 769                 printk(KERN_ERR "Failed to alloc wiphy.\n");
 770                 return 1;
 771         }
 772
 773         /* Allocate and initialize the struct device */
 774         netdev = alloc_netdev(sizeof(struct wireless_dev), "wlan%d",
 775                                 ether_setup);
 776         if (netdev == NULL) {
 777                 printk(KERN_ERR "Failed to alloc netdev.\n");
 778                 wlan_free_wiphy(wiphy);
 779                 result = 1;
 780         } else {
 781                 wlandev->netdev = netdev;
 782                 netdev->ml_priv = wlandev;
 783                 netdev->netdev_ops = &p80211_netdev_ops;
 784                 wdev = netdev_priv(netdev);
 785                 wdev->wiphy = wiphy;
 786                 wdev->iftype = NL80211_IFTYPE_STATION;
 787                 netdev->ieee80211_ptr = wdev;
 788
 789                 netif_stop_queue(netdev);
 790                 netif_carrier_off(netdev);
 791         }
 792
 793         return result;
 794 }
 795
 796 /*----------------------------------------------------------------
 797 * wlan_unsetup
 798 *
 799 * This function is paired with the wlan_setup routine.  It should
 800 * be called after unregister_wlandev.  Basically, all it does is
 801 * free the 'struct device' that's associated with the wlandev.
 802 * We do it here because the 'struct device' isn't allocated
 803 * explicitly in the driver code, it's done in wlan_setup.  To
 804 * do the free in the driver might seem like 'magic'.
 805 *
 806 * Arguments:
 807 *       wlandev         ptr to the wlandev structure for the
 808 *                       interface.
 809 * Returns:
 810 *       zero on success, non-zero otherwise.
 811 * Call Context:
 812 *       Should be process thread.  We'll assume it might be
 813 *       interrupt though.  When we add support for statically
 814 *       compiled drivers, this function will be called in the
 815 *       context of the kernel startup code.
 816 ----------------------------------------------------------------*/
 817 int wlan_unsetup(wlandevice_t *wlandev)
 818 {
 819         struct wireless_dev *wdev;
 820
 821         tasklet_kill(&wlandev->rx_bh);
 822
 823         if (wlandev->netdev) {
 824                 wdev = netdev_priv(wlandev->netdev);
 825                 if (wdev->wiphy)
 826                         wlan_free_wiphy(wdev->wiphy);
 827                 free_netdev(wlandev->netdev);
 828                 wlandev->netdev = NULL;
 829         }
 830
 831         return 0;
 832 }
 833
 834 /*----------------------------------------------------------------
 835 * register_wlandev
 836 *
 837 * Roughly matches the functionality of register_netdev.  This function
 838 * is called after the driver has successfully probed and set up the
 839 * resources for the device.  It's now ready to become a named device
 840 * in the Linux system.
 841 *
 842 * First we allocate a name for the device (if not already set), then
 843 * we call the Linux function register_netdevice.
 844 *
 845 * Arguments:
 846 *       wlandev         ptr to the wlandev structure for the
 847 *                       interface.
 848 * Returns:
 849 *       zero on success, non-zero otherwise.
 850 * Call Context:
 851 *       Can be either interrupt or not.
 852 ----------------------------------------------------------------*/
 853 int register_wlandev(wlandevice_t *wlandev)
 854 {
 855         int i = 0;
 856
 857         i = register_netdev(wlandev->netdev);
 858         if (i)
 859                 return i;
 860
 861         return 0;
 862 }
 863
 864 /*----------------------------------------------------------------
 865 * unregister_wlandev
 866 *
 867 * Roughly matches the functionality of unregister_netdev.  This
 868 * function is called to remove a named device from the system.
 869 *
 870 * First we tell linux that the device should no longer exist.
 871 * Then we remove it from the list of known wlan devices.
 872 *
 873 * Arguments:
 874 *       wlandev         ptr to the wlandev structure for the
 875 *                       interface.
 876 * Returns:
 877 *       zero on success, non-zero otherwise.
 878 * Call Context:
 879 *       Can be either interrupt or not.
 880 ----------------------------------------------------------------*/
 881 int unregister_wlandev(wlandevice_t *wlandev)
 882 {
 883         struct sk_buff *skb;
 884
 885         unregister_netdev(wlandev->netdev);
 886
 887         /* Now to clean out the rx queue */
 888         while ((skb = skb_dequeue(&wlandev->nsd_rxq)))
 889                 dev_kfree_skb(skb);
 890
 891         return 0;
 892 }
 893
 894 /*----------------------------------------------------------------
 895 * p80211netdev_hwremoved
 896 *
 897 * Hardware removed notification. This function should be called
 898 * immediately after an MSD has detected that the underlying hardware
 899 * has been yanked out from under us.  The primary things we need
 900 * to do are:
 901 *   - Mark the wlandev
 902 *   - Prevent any further traffic from the knetdev i/f
 903 *   - Prevent any further requests from mgmt i/f
 904 *   - If there are any waitq'd mgmt requests or mgmt-frame exchanges,
 905 *     shut them down.
 906 *   - Call the MSD hwremoved function.
 907 *
 908 * The remainder of the cleanup will be handled by unregister().
 909 * Our primary goal here is to prevent as much tickling of the MSD
 910 * as possible since the MSD is already in a 'wounded' state.
 911 *
 912 * TODO: As new features are added, this function should be
 913 *       updated.
 914 *
 915 * Arguments:
 916 *       wlandev         WLAN network device structure
 917 * Returns:
 918 *       nothing
 919 * Side effects:
 920 *
 921 * Call context:
 922 *       Usually interrupt.
 923 ----------------------------------------------------------------*/
 924 void p80211netdev_hwremoved(wlandevice_t *wlandev)
 925 {
 926         wlandev->hwremoved = 1;
 927         if (wlandev->state == WLAN_DEVICE_OPEN)
 928                 netif_stop_queue(wlandev->netdev);
 929
 930         netif_device_detach(wlandev->netdev);
 931 }
 932
 933 /*----------------------------------------------------------------
 934 * p80211_rx_typedrop
 935 *
 936 * Classifies the frame, increments the appropriate counter, and
 937 * returns 0|1|2 indicating whether the driver should handle, ignore, or
 938 * drop the frame
 939 *
 940 * Arguments:
 941 *       wlandev         wlan device structure
 942 *       fc              frame control field
 943 *
 944 * Returns:
 945 *       zero if the frame should be handled by the driver,
 946 *       one if the frame should be ignored
 947 *       anything else means we drop it.
 948 *
 949 * Side effects:
 950 *
 951 * Call context:
 952 *       interrupt
 953 ----------------------------------------------------------------*/
 954 static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc)
 955 {
 956         u16 ftype;
 957         u16 fstype;
 958         int drop = 0;
 959         /* Classify frame, increment counter */
 960         ftype = WLAN_GET_FC_FTYPE(fc);
 961         fstype = WLAN_GET_FC_FSTYPE(fc);
 962 #if 0
 963         pr_debug("rx_typedrop : ftype=%d fstype=%d.\n", ftype, fstype);
 964 #endif
 965         switch (ftype) {
 966         case WLAN_FTYPE_MGMT:
 967                 if ((wlandev->netdev->flags & IFF_PROMISC) ||
 968                     (wlandev->netdev->flags & IFF_ALLMULTI)) {
 969                         drop = 1;
 970                         break;
 971                 }
 972                 pr_debug("rx'd mgmt:\n");
 973                 wlandev->rx.mgmt++;
 974                 switch (fstype) {
 975                 case WLAN_FSTYPE_ASSOCREQ:
 976                         /* printk("assocreq"); */
 977                         wlandev->rx.assocreq++;
 978                         break;
 979                 case WLAN_FSTYPE_ASSOCRESP:
 980                         /* printk("assocresp"); */
 981                         wlandev->rx.assocresp++;
 982                         break;
 983                 case WLAN_FSTYPE_REASSOCREQ:
 984                         /* printk("reassocreq"); */
 985                         wlandev->rx.reassocreq++;
 986                         break;
 987                 case WLAN_FSTYPE_REASSOCRESP:
 988                         /* printk("reassocresp"); */
 989                         wlandev->rx.reassocresp++;
 990                         break;
 991                 case WLAN_FSTYPE_PROBEREQ:
 992                         /* printk("probereq"); */
 993                         wlandev->rx.probereq++;
 994                         break;
 995                 case WLAN_FSTYPE_PROBERESP:
 996                         /* printk("proberesp"); */
 997                         wlandev->rx.proberesp++;
 998                         break;
 999                 case WLAN_FSTYPE_BEACON:
1000                         /* printk("beacon"); */
1001                         wlandev->rx.beacon++;
1002                         break;
1003                 case WLAN_FSTYPE_ATIM:
1004                         /* printk("atim"); */
1005                         wlandev->rx.atim++;
1006                         break;
1007                 case WLAN_FSTYPE_DISASSOC:
1008                         /* printk("disassoc"); */
1009                         wlandev->rx.disassoc++;
1010                         break;
1011                 case WLAN_FSTYPE_AUTHEN:
1012                         /* printk("authen"); */
1013                         wlandev->rx.authen++;
1014                         break;
1015                 case WLAN_FSTYPE_DEAUTHEN:
1016                         /* printk("deauthen"); */
1017                         wlandev->rx.deauthen++;
1018                         break;
1019                 default:
1020                         /* printk("unknown"); */
1021                         wlandev->rx.mgmt_unknown++;
1022                         break;
1023                 }
1024                 /* printk("\n"); */
1025                 drop = 2;
1026                 break;
1027
1028         case WLAN_FTYPE_CTL:
1029                 if ((wlandev->netdev->flags & IFF_PROMISC) ||
1030                     (wlandev->netdev->flags & IFF_ALLMULTI)) {
1031                         drop = 1;
1032                         break;
1033                 }
1034                 pr_debug("rx'd ctl:\n");
1035                 wlandev->rx.ctl++;
1036                 switch (fstype) {
1037                 case WLAN_FSTYPE_PSPOLL:
1038                         /* printk("pspoll"); */
1039                         wlandev->rx.pspoll++;
1040                         break;
1041                 case WLAN_FSTYPE_RTS:
1042                         /* printk("rts"); */
1043                         wlandev->rx.rts++;
1044                         break;
1045                 case WLAN_FSTYPE_CTS:
1046                         /* printk("cts"); */
1047                         wlandev->rx.cts++;
1048                         break;
1049                 case WLAN_FSTYPE_ACK:
1050                         /* printk("ack"); */
1051                         wlandev->rx.ack++;
1052                         break;
1053                 case WLAN_FSTYPE_CFEND:
1054                         /* printk("cfend"); */
1055                         wlandev->rx.cfend++;
1056                         break;
1057                 case WLAN_FSTYPE_CFENDCFACK:
1058                         /* printk("cfendcfack"); */
1059                         wlandev->rx.cfendcfack++;
1060                         break;
1061                 default:
1062                         /* printk("unknown"); */
1063                         wlandev->rx.ctl_unknown++;
1064                         break;
1065                 }
1066                 /* printk("\n"); */
1067                 drop = 2;
1068                 break;
1069
1070         case WLAN_FTYPE_DATA:
1071                 wlandev->rx.data++;
1072                 switch (fstype) {
1073                 case WLAN_FSTYPE_DATAONLY:
1074                         wlandev->rx.dataonly++;
1075                         break;
1076                 case WLAN_FSTYPE_DATA_CFACK:
1077                         wlandev->rx.data_cfack++;
1078                         break;
1079                 case WLAN_FSTYPE_DATA_CFPOLL:
1080                         wlandev->rx.data_cfpoll++;
1081                         break;
1082                 case WLAN_FSTYPE_DATA_CFACK_CFPOLL:
1083                         wlandev->rx.data__cfack_cfpoll++;
1084                         break;
1085                 case WLAN_FSTYPE_NULL:
1086                         pr_debug("rx'd data:null\n");
1087                         wlandev->rx.null++;
1088                         break;
1089                 case WLAN_FSTYPE_CFACK:
1090                         pr_debug("rx'd data:cfack\n");
1091                         wlandev->rx.cfack++;
1092                         break;
1093                 case WLAN_FSTYPE_CFPOLL:
1094                         pr_debug("rx'd data:cfpoll\n");
1095                         wlandev->rx.cfpoll++;
1096                         break;
1097                 case WLAN_FSTYPE_CFACK_CFPOLL:
1098                         pr_debug("rx'd data:cfack_cfpoll\n");
1099                         wlandev->rx.cfack_cfpoll++;
1100                         break;
1101                 default:
1102                         /* printk("unknown"); */
1103                         wlandev->rx.data_unknown++;
1104                         break;
1105                 }
1106
1107                 break;
1108         }
1109         return drop;
1110 }
1111
1112 static void p80211knetdev_tx_timeout(netdevice_t *netdev)
1113 {
1114         wlandevice_t *wlandev = netdev->ml_priv;
1115
1116         if (wlandev->tx_timeout) {
1117                 wlandev->tx_timeout(wlandev);
1118         } else {
1119                 printk(KERN_WARNING "Implement tx_timeout for %s\n",
1120                        wlandev->nsdname);
1121                 netif_wake_queue(wlandev->netdev);
1122         }
1123 }