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         p80211_wep.data = NULL;
 358
 359         if (skb == NULL)
 360                 return NETDEV_TX_OK;
 361
 362         if (wlandev->state != WLAN_DEVICE_OPEN) {
 363                 result = 1;
 364                 goto failed;
 365         }
 366
 367         memset(&p80211_hdr, 0, sizeof(union p80211_hdr));
 368         memset(&p80211_wep, 0, sizeof(struct p80211_metawep));
 369
 370         if (netif_queue_stopped(netdev)) {
 371                 pr_debug("called when queue stopped.\n");
 372                 result = 1;
 373                 goto failed;
 374         }
 375
 376         netif_stop_queue(netdev);
 377
 378         /* Check to see that a valid mode is set */
 379         switch (wlandev->macmode) {
 380         case WLAN_MACMODE_IBSS_STA:
 381         case WLAN_MACMODE_ESS_STA:
 382         case WLAN_MACMODE_ESS_AP:
 383                 break;
 384         default:
 385                 /* Mode isn't set yet, just drop the frame
 386                  * and return success .
 387                  * TODO: we need a saner way to handle this
 388                  */
 389                 if (skb->protocol != ETH_P_80211_RAW) {
 390                         netif_start_queue(wlandev->netdev);
 391                         printk(KERN_NOTICE
 392                                "Tx attempt prior to association, frame dropped.\n");
 393                         wlandev->linux_stats.tx_dropped++;
 394                         result = 0;
 395                         goto failed;
 396                 }
 397                 break;
 398         }
 399
 400         /* Check for raw transmits */
 401         if (skb->protocol == ETH_P_80211_RAW) {
 402                 if (!capable(CAP_NET_ADMIN)) {
 403                         result = 1;
 404                         goto failed;
 405                 }
 406                 /* move the header over */
 407                 memcpy(&p80211_hdr, skb->data, sizeof(union p80211_hdr));
 408                 skb_pull(skb, sizeof(union p80211_hdr));
 409         } else {
 410                 if (skb_ether_to_p80211
 411                     (wlandev, wlandev->ethconv, skb, &p80211_hdr,
 412                      &p80211_wep) != 0) {
 413                         /* convert failed */
 414                         pr_debug("ether_to_80211(%d) failed.\n",
 415                                  wlandev->ethconv);
 416                         result = 1;
 417                         goto failed;
 418                 }
 419         }
 420         if (wlandev->txframe == NULL) {
 421                 result = 1;
 422                 goto failed;
 423         }
 424
 425         netdev->trans_start = jiffies;
 426
 427         wlandev->linux_stats.tx_packets++;
 428         /* count only the packet payload */
 429         wlandev->linux_stats.tx_bytes += skb->len;
 430
 431         txresult = wlandev->txframe(wlandev, skb, &p80211_hdr, &p80211_wep);
 432
 433         if (txresult == 0) {
 434                 /* success and more buf */
 435                 /* avail, re: hw_txdata */
 436                 netif_wake_queue(wlandev->netdev);
 437                 result = NETDEV_TX_OK;
 438         } else if (txresult == 1) {
 439                 /* success, no more avail */
 440                 pr_debug("txframe success, no more bufs\n");
 441                 /* netdev->tbusy = 1;  don't set here, irqhdlr */
 442                 /*   may have already cleared it */
 443                 result = NETDEV_TX_OK;
 444         } else if (txresult == 2) {
 445                 /* alloc failure, drop frame */
 446                 pr_debug("txframe returned alloc_fail\n");
 447                 result = NETDEV_TX_BUSY;
 448         } else {
 449                 /* buffer full or queue busy, drop frame. */
 450                 pr_debug("txframe returned full or busy\n");
 451                 result = NETDEV_TX_BUSY;
 452         }
 453
 454 failed:
 455         /* Free up the WEP buffer if it's not the same as the skb */
 456         if ((p80211_wep.data) && (p80211_wep.data != skb->data))
 457                 kzfree(p80211_wep.data);
 458
 459         /* we always free the skb here, never in a lower level. */
 460         if (!result)
 461                 dev_kfree_skb(skb);
 462
 463         return result;
 464 }
 465
 466 /*----------------------------------------------------------------
 467 * p80211knetdev_set_multicast_list
 468 *
 469 * Called from higher lavers whenever there's a need to set/clear
 470 * promiscuous mode or rewrite the multicast list.
 471 *
 472 * Arguments:
 473 *       none
 474 *
 475 * Returns:
 476 *       nothing
 477 ----------------------------------------------------------------*/
 478 static void p80211knetdev_set_multicast_list(netdevice_t *dev)
 479 {
 480         wlandevice_t *wlandev = dev->ml_priv;
 481
 482         /* TODO:  real multicast support as well */
 483
 484         if (wlandev->set_multicast_list)
 485                 wlandev->set_multicast_list(wlandev, dev);
 486
 487 }
 488
 489 #ifdef SIOCETHTOOL
 490
 491 static int p80211netdev_ethtool(wlandevice_t *wlandev, void __user *useraddr)
 492 {
 493         u32 ethcmd;
 494         struct ethtool_drvinfo info;
 495         struct ethtool_value edata;
 496
 497         memset(&info, 0, sizeof(info));
 498         memset(&edata, 0, sizeof(edata));
 499
 500         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
 501                 return -EFAULT;
 502
 503         switch (ethcmd) {
 504         case ETHTOOL_GDRVINFO:
 505                 info.cmd = ethcmd;
 506                 snprintf(info.driver, sizeof(info.driver), "p80211_%s",
 507                          wlandev->nsdname);
 508                 snprintf(info.version, sizeof(info.version), "%s",
 509                          WLAN_RELEASE);
 510
 511                 if (copy_to_user(useraddr, &info, sizeof(info)))
 512                         return -EFAULT;
 513                 return 0;
 514 #ifdef ETHTOOL_GLINK
 515         case ETHTOOL_GLINK:
 516                 edata.cmd = ethcmd;
 517
 518                 if (wlandev->linkstatus &&
 519                     (wlandev->macmode != WLAN_MACMODE_NONE)) {
 520                         edata.data = 1;
 521                 } else {
 522                         edata.data = 0;
 523                 }
 524
 525                 if (copy_to_user(useraddr, &edata, sizeof(edata)))
 526                         return -EFAULT;
 527                 return 0;
 528 #endif
 529         }
 530
 531         return -EOPNOTSUPP;
 532 }
 533
 534 #endif
 535
 536 /*----------------------------------------------------------------
 537 * p80211knetdev_do_ioctl
 538 *
 539 * Handle an ioctl call on one of our devices.  Everything Linux
 540 * ioctl specific is done here.  Then we pass the contents of the
 541 * ifr->data to the request message handler.
 542 *
 543 * Arguments:
 544 *       dev     Linux kernel netdevice
 545 *       ifr     Our private ioctl request structure, typed for the
 546 *               generic struct ifreq so we can use ptr to func
 547 *               w/o cast.
 548 *
 549 * Returns:
 550 *       zero on success, a negative errno on failure.  Possible values:
 551 *               -ENETDOWN Device isn't up.
 552 *               -EBUSY  cmd already in progress
 553 *               -ETIME  p80211 cmd timed out (MSD may have its own timers)
 554 *               -EFAULT memory fault copying msg from user buffer
 555 *               -ENOMEM unable to allocate kernel msg buffer
 556 *               -ENOSYS bad magic, it the cmd really for us?
 557 *               -EintR  sleeping on cmd, awakened by signal, cmd cancelled.
 558 *
 559 * Call Context:
 560 *       Process thread (ioctl caller).  TODO: SMP support may require
 561 *       locks.
 562 ----------------------------------------------------------------*/
 563 static int p80211knetdev_do_ioctl(netdevice_t *dev, struct ifreq *ifr, int cmd)
 564 {
 565         int result = 0;
 566         struct p80211ioctl_req *req = (struct p80211ioctl_req *) ifr;
 567         wlandevice_t *wlandev = dev->ml_priv;
 568         u8 *msgbuf;
 569
 570         pr_debug("rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len);
 571
 572 #ifdef SIOCETHTOOL
 573         if (cmd == SIOCETHTOOL) {
 574                 result =
 575                     p80211netdev_ethtool(wlandev, (void __user *)ifr->ifr_data);
 576                 goto bail;
 577         }
 578 #endif
 579
 580         /* Test the magic, assume ifr is good if it's there */
 581         if (req->magic != P80211_IOCTL_MAGIC) {
 582                 result = -ENOSYS;
 583                 goto bail;
 584         }
 585
 586         if (cmd == P80211_IFTEST) {
 587                 result = 0;
 588                 goto bail;
 589         } else if (cmd != P80211_IFREQ) {
 590                 result = -ENOSYS;
 591                 goto bail;
 592         }
 593
 594         /* Allocate a buf of size req->len */
 595         msgbuf = kmalloc(req->len, GFP_KERNEL);
 596         if (msgbuf) {
 597                 if (copy_from_user(msgbuf, (void __user *)req->data, req->len))
 598                         result = -EFAULT;
 599                 else
 600                         result = p80211req_dorequest(wlandev, msgbuf);
 601
 602                 if (result == 0) {
 603                         if (copy_to_user
 604                             ((void __user *)req->data, msgbuf, req->len)) {
 605                                 result = -EFAULT;
 606                         }
 607                 }
 608                 kfree(msgbuf);
 609         } else {
 610                 result = -ENOMEM;
 611         }
 612 bail:
 613         /* If allocate,copyfrom or copyto fails, return errno */
 614         return result;
 615 }
 616
 617 /*----------------------------------------------------------------
 618 * p80211knetdev_set_mac_address
 619 *
 620 * Handles the ioctl for changing the MACAddress of a netdevice
 621 *
 622 * references: linux/netdevice.h and drivers/net/net_init.c
 623 *
 624 * NOTE: [MSM] We only prevent address changes when the netdev is
 625 * up.  We don't control anything based on dot11 state.  If the
 626 * address is changed on a STA that's currently associated, you
 627 * will probably lose the ability to send and receive data frames.
 628 * Just be aware.  Therefore, this should usually only be done
 629 * prior to scan/join/auth/assoc.
 630 *
 631 * Arguments:
 632 *       dev     netdevice struct
 633 *       addr    the new MACAddress (a struct)
 634 *
 635 * Returns:
 636 *       zero on success, a negative errno on failure.  Possible values:
 637 *               -EBUSY  device is bussy (cmd not possible)
 638 *               -and errors returned by: p80211req_dorequest(..)
 639 *
 640 * by: Collin R. Mulliner <collin@mulliner.org>
 641 ----------------------------------------------------------------*/
 642 static int p80211knetdev_set_mac_address(netdevice_t *dev, void *addr)
 643 {
 644         struct sockaddr *new_addr = addr;
 645         struct p80211msg_dot11req_mibset dot11req;
 646         p80211item_unk392_t *mibattr;
 647         p80211item_pstr6_t *macaddr;
 648         p80211item_uint32_t *resultcode;
 649         int result = 0;
 650
 651         /* If we're running, we don't allow MAC address changes */
 652         if (netif_running(dev))
 653                 return -EBUSY;
 654
 655         /* Set up some convenience pointers. */
 656         mibattr = &dot11req.mibattribute;
 657         macaddr = (p80211item_pstr6_t *) &mibattr->data;
 658         resultcode = &dot11req.resultcode;
 659
 660         /* Set up a dot11req_mibset */
 661         memset(&dot11req, 0, sizeof(struct p80211msg_dot11req_mibset));
 662         dot11req.msgcode = DIDmsg_dot11req_mibset;
 663         dot11req.msglen = sizeof(struct p80211msg_dot11req_mibset);
 664         memcpy(dot11req.devname,
 665                ((wlandevice_t *) dev->ml_priv)->name, WLAN_DEVNAMELEN_MAX - 1);
 666
 667         /* Set up the mibattribute argument */
 668         mibattr->did = DIDmsg_dot11req_mibset_mibattribute;
 669         mibattr->status = P80211ENUM_msgitem_status_data_ok;
 670         mibattr->len = sizeof(mibattr->data);
 671
 672         macaddr->did = DIDmib_dot11mac_dot11OperationTable_dot11MACAddress;
 673         macaddr->status = P80211ENUM_msgitem_status_data_ok;
 674         macaddr->len = sizeof(macaddr->data);
 675         macaddr->data.len = ETH_ALEN;
 676         memcpy(&macaddr->data.data, new_addr->sa_data, ETH_ALEN);
 677
 678         /* Set up the resultcode argument */
 679         resultcode->did = DIDmsg_dot11req_mibset_resultcode;
 680         resultcode->status = P80211ENUM_msgitem_status_no_value;
 681         resultcode->len = sizeof(resultcode->data);
 682         resultcode->data = 0;
 683
 684         /* now fire the request */
 685         result = p80211req_dorequest(dev->ml_priv, (u8 *) &dot11req);
 686
 687         /* If the request wasn't successful, report an error and don't
 688          * change the netdev address
 689          */
 690         if (result != 0 || resultcode->data != P80211ENUM_resultcode_success) {
 691                 printk(KERN_ERR
 692                        "Low-level driver failed dot11req_mibset(dot11MACAddress).\n");
 693                 result = -EADDRNOTAVAIL;
 694         } else {
 695                 /* everything's ok, change the addr in netdev */
 696                 memcpy(dev->dev_addr, new_addr->sa_data, dev->addr_len);
 697         }
 698
 699         return result;
 700 }
 701
 702 static int wlan_change_mtu(netdevice_t *dev, int new_mtu)
 703 {
 704         /* 2312 is max 802.11 payload, 20 is overhead, (ether + llc +snap)
 705            and another 8 for wep. */
 706         if ((new_mtu < 68) || (new_mtu > (2312 - 20 - 8)))
 707                 return -EINVAL;
 708
 709         dev->mtu = new_mtu;
 710
 711         return 0;
 712 }
 713
 714 static const struct net_device_ops p80211_netdev_ops = {
 715         .ndo_init = p80211knetdev_init,
 716         .ndo_open = p80211knetdev_open,
 717         .ndo_stop = p80211knetdev_stop,
 718         .ndo_get_stats = p80211knetdev_get_stats,
 719         .ndo_start_xmit = p80211knetdev_hard_start_xmit,
 720         .ndo_set_rx_mode = p80211knetdev_set_multicast_list,
 721         .ndo_do_ioctl = p80211knetdev_do_ioctl,
 722         .ndo_set_mac_address = p80211knetdev_set_mac_address,
 723         .ndo_tx_timeout = p80211knetdev_tx_timeout,
 724         .ndo_change_mtu = wlan_change_mtu,
 725         .ndo_validate_addr = eth_validate_addr,
 726 };
 727
 728 /*----------------------------------------------------------------
 729 * wlan_setup
 730 *
 731 * Roughly matches the functionality of ether_setup.  Here
 732 * we set up any members of the wlandevice structure that are common
 733 * to all devices.  Additionally, we allocate a linux 'struct device'
 734 * and perform the same setup as ether_setup.
 735 *
 736 * Note: It's important that the caller have setup the wlandev->name
 737 *       ptr prior to calling this function.
 738 *
 739 * Arguments:
 740 *       wlandev         ptr to the wlandev structure for the
 741 *                       interface.
 742 *       physdev         ptr to usb device
 743 * Returns:
 744 *       zero on success, non-zero otherwise.
 745 * Call Context:
 746 *       Should be process thread.  We'll assume it might be
 747 *       interrupt though.  When we add support for statically
 748 *       compiled drivers, this function will be called in the
 749 *       context of the kernel startup code.
 750 ----------------------------------------------------------------*/
 751 int wlan_setup(wlandevice_t *wlandev, struct device *physdev)
 752 {
 753         int result = 0;
 754         netdevice_t *netdev;
 755         struct wiphy *wiphy;
 756         struct wireless_dev *wdev;
 757
 758         /* Set up the wlandev */
 759         wlandev->state = WLAN_DEVICE_CLOSED;
 760         wlandev->ethconv = WLAN_ETHCONV_8021h;
 761         wlandev->macmode = WLAN_MACMODE_NONE;
 762
 763         /* Set up the rx queue */
 764         skb_queue_head_init(&wlandev->nsd_rxq);
 765         tasklet_init(&wlandev->rx_bh,
 766                      p80211netdev_rx_bh, (unsigned long)wlandev);
 767
 768         /* Allocate and initialize the wiphy struct */
 769         wiphy = wlan_create_wiphy(physdev, wlandev);
 770         if (wiphy == NULL) {
 771                 printk(KERN_ERR "Failed to alloc wiphy.\n");
 772                 return 1;
 773         }
 774
 775         /* Allocate and initialize the struct device */
 776         netdev = alloc_netdev(sizeof(struct wireless_dev), "wlan%d",
 777                                 ether_setup);
 778         if (netdev == NULL) {
 779                 printk(KERN_ERR "Failed to alloc netdev.\n");
 780                 wlan_free_wiphy(wiphy);
 781                 result = 1;
 782         } else {
 783                 wlandev->netdev = netdev;
 784                 netdev->ml_priv = wlandev;
 785                 netdev->netdev_ops = &p80211_netdev_ops;
 786                 wdev = netdev_priv(netdev);
 787                 wdev->wiphy = wiphy;
 788                 wdev->iftype = NL80211_IFTYPE_STATION;
 789                 netdev->ieee80211_ptr = wdev;
 790
 791                 netif_stop_queue(netdev);
 792                 netif_carrier_off(netdev);
 793         }
 794
 795         return result;
 796 }
 797
 798 /*----------------------------------------------------------------
 799 * wlan_unsetup
 800 *
 801 * This function is paired with the wlan_setup routine.  It should
 802 * be called after unregister_wlandev.  Basically, all it does is
 803 * free the 'struct device' that's associated with the wlandev.
 804 * We do it here because the 'struct device' isn't allocated
 805 * explicitly in the driver code, it's done in wlan_setup.  To
 806 * do the free in the driver might seem like 'magic'.
 807 *
 808 * Arguments:
 809 *       wlandev         ptr to the wlandev structure for the
 810 *                       interface.
 811 * Returns:
 812 *       zero on success, non-zero otherwise.
 813 * Call Context:
 814 *       Should be process thread.  We'll assume it might be
 815 *       interrupt though.  When we add support for statically
 816 *       compiled drivers, this function will be called in the
 817 *       context of the kernel startup code.
 818 ----------------------------------------------------------------*/
 819 int wlan_unsetup(wlandevice_t *wlandev)
 820 {
 821         struct wireless_dev *wdev;
 822
 823         tasklet_kill(&wlandev->rx_bh);
 824
 825         if (wlandev->netdev) {
 826                 wdev = netdev_priv(wlandev->netdev);
 827                 if (wdev->wiphy)
 828                         wlan_free_wiphy(wdev->wiphy);
 829                 free_netdev(wlandev->netdev);
 830                 wlandev->netdev = NULL;
 831         }
 832
 833         return 0;
 834 }
 835
 836 /*----------------------------------------------------------------
 837 * register_wlandev
 838 *
 839 * Roughly matches the functionality of register_netdev.  This function
 840 * is called after the driver has successfully probed and set up the
 841 * resources for the device.  It's now ready to become a named device
 842 * in the Linux system.
 843 *
 844 * First we allocate a name for the device (if not already set), then
 845 * we call the Linux function register_netdevice.
 846 *
 847 * Arguments:
 848 *       wlandev         ptr to the wlandev structure for the
 849 *                       interface.
 850 * Returns:
 851 *       zero on success, non-zero otherwise.
 852 * Call Context:
 853 *       Can be either interrupt or not.
 854 ----------------------------------------------------------------*/
 855 int register_wlandev(wlandevice_t *wlandev)
 856 {
 857         int i = 0;
 858
 859         i = register_netdev(wlandev->netdev);
 860         if (i)
 861                 return i;
 862
 863         return 0;
 864 }
 865
 866 /*----------------------------------------------------------------
 867 * unregister_wlandev
 868 *
 869 * Roughly matches the functionality of unregister_netdev.  This
 870 * function is called to remove a named device from the system.
 871 *
 872 * First we tell linux that the device should no longer exist.
 873 * Then we remove it from the list of known wlan devices.
 874 *
 875 * Arguments:
 876 *       wlandev         ptr to the wlandev structure for the
 877 *                       interface.
 878 * Returns:
 879 *       zero on success, non-zero otherwise.
 880 * Call Context:
 881 *       Can be either interrupt or not.
 882 ----------------------------------------------------------------*/
 883 int unregister_wlandev(wlandevice_t *wlandev)
 884 {
 885         struct sk_buff *skb;
 886
 887         unregister_netdev(wlandev->netdev);
 888
 889         /* Now to clean out the rx queue */
 890         while ((skb = skb_dequeue(&wlandev->nsd_rxq)))
 891                 dev_kfree_skb(skb);
 892
 893         return 0;
 894 }
 895
 896 /*----------------------------------------------------------------
 897 * p80211netdev_hwremoved
 898 *
 899 * Hardware removed notification. This function should be called
 900 * immediately after an MSD has detected that the underlying hardware
 901 * has been yanked out from under us.  The primary things we need
 902 * to do are:
 903 *   - Mark the wlandev
 904 *   - Prevent any further traffic from the knetdev i/f
 905 *   - Prevent any further requests from mgmt i/f
 906 *   - If there are any waitq'd mgmt requests or mgmt-frame exchanges,
 907 *     shut them down.
 908 *   - Call the MSD hwremoved function.
 909 *
 910 * The remainder of the cleanup will be handled by unregister().
 911 * Our primary goal here is to prevent as much tickling of the MSD
 912 * as possible since the MSD is already in a 'wounded' state.
 913 *
 914 * TODO: As new features are added, this function should be
 915 *       updated.
 916 *
 917 * Arguments:
 918 *       wlandev         WLAN network device structure
 919 * Returns:
 920 *       nothing
 921 * Side effects:
 922 *
 923 * Call context:
 924 *       Usually interrupt.
 925 ----------------------------------------------------------------*/
 926 void p80211netdev_hwremoved(wlandevice_t *wlandev)
 927 {
 928         wlandev->hwremoved = 1;
 929         if (wlandev->state == WLAN_DEVICE_OPEN)
 930                 netif_stop_queue(wlandev->netdev);
 931
 932         netif_device_detach(wlandev->netdev);
 933 }
 934
 935 /*----------------------------------------------------------------
 936 * p80211_rx_typedrop
 937 *
 938 * Classifies the frame, increments the appropriate counter, and
 939 * returns 0|1|2 indicating whether the driver should handle, ignore, or
 940 * drop the frame
 941 *
 942 * Arguments:
 943 *       wlandev         wlan device structure
 944 *       fc              frame control field
 945 *
 946 * Returns:
 947 *       zero if the frame should be handled by the driver,
 948 *       one if the frame should be ignored
 949 *       anything else means we drop it.
 950 *
 951 * Side effects:
 952 *
 953 * Call context:
 954 *       interrupt
 955 ----------------------------------------------------------------*/
 956 static int p80211_rx_typedrop(wlandevice_t *wlandev, u16 fc)
 957 {
 958         u16 ftype;
 959         u16 fstype;
 960         int drop = 0;
 961         /* Classify frame, increment counter */
 962         ftype = WLAN_GET_FC_FTYPE(fc);
 963         fstype = WLAN_GET_FC_FSTYPE(fc);
 964 #if 0
 965         pr_debug("rx_typedrop : ftype=%d fstype=%d.\n", ftype, fstype);
 966 #endif
 967         switch (ftype) {
 968         case WLAN_FTYPE_MGMT:
 969                 if ((wlandev->netdev->flags & IFF_PROMISC) ||
 970                     (wlandev->netdev->flags & IFF_ALLMULTI)) {
 971                         drop = 1;
 972                         break;
 973                 }
 974                 pr_debug("rx'd mgmt:\n");
 975                 wlandev->rx.mgmt++;
 976                 switch (fstype) {
 977                 case WLAN_FSTYPE_ASSOCREQ:
 978                         /* printk("assocreq"); */
 979                         wlandev->rx.assocreq++;
 980                         break;
 981                 case WLAN_FSTYPE_ASSOCRESP:
 982                         /* printk("assocresp"); */
 983                         wlandev->rx.assocresp++;
 984                         break;
 985                 case WLAN_FSTYPE_REASSOCREQ:
 986                         /* printk("reassocreq"); */
 987                         wlandev->rx.reassocreq++;
 988                         break;
 989                 case WLAN_FSTYPE_REASSOCRESP:
 990                         /* printk("reassocresp"); */
 991                         wlandev->rx.reassocresp++;
 992                         break;
 993                 case WLAN_FSTYPE_PROBEREQ:
 994                         /* printk("probereq"); */
 995                         wlandev->rx.probereq++;
 996                         break;
 997                 case WLAN_FSTYPE_PROBERESP:
 998                         /* printk("proberesp"); */
 999                         wlandev->rx.proberesp++;
1000                         break;
1001                 case WLAN_FSTYPE_BEACON:
1002                         /* printk("beacon"); */
1003                         wlandev->rx.beacon++;
1004                         break;
1005                 case WLAN_FSTYPE_ATIM:
1006                         /* printk("atim"); */
1007                         wlandev->rx.atim++;
1008                         break;
1009                 case WLAN_FSTYPE_DISASSOC:
1010                         /* printk("disassoc"); */
1011                         wlandev->rx.disassoc++;
1012                         break;
1013                 case WLAN_FSTYPE_AUTHEN:
1014                         /* printk("authen"); */
1015                         wlandev->rx.authen++;
1016                         break;
1017                 case WLAN_FSTYPE_DEAUTHEN:
1018                         /* printk("deauthen"); */
1019                         wlandev->rx.deauthen++;
1020                         break;
1021                 default:
1022                         /* printk("unknown"); */
1023                         wlandev->rx.mgmt_unknown++;
1024                         break;
1025                 }
1026                 /* printk("\n"); */
1027                 drop = 2;
1028                 break;
1029
1030         case WLAN_FTYPE_CTL:
1031                 if ((wlandev->netdev->flags & IFF_PROMISC) ||
1032                     (wlandev->netdev->flags & IFF_ALLMULTI)) {
1033                         drop = 1;
1034                         break;
1035                 }
1036                 pr_debug("rx'd ctl:\n");
1037                 wlandev->rx.ctl++;
1038                 switch (fstype) {
1039                 case WLAN_FSTYPE_PSPOLL:
1040                         /* printk("pspoll"); */
1041                         wlandev->rx.pspoll++;
1042                         break;
1043                 case WLAN_FSTYPE_RTS:
1044                         /* printk("rts"); */
1045                         wlandev->rx.rts++;
1046                         break;
1047                 case WLAN_FSTYPE_CTS:
1048                         /* printk("cts"); */
1049                         wlandev->rx.cts++;
1050                         break;
1051                 case WLAN_FSTYPE_ACK:
1052                         /* printk("ack"); */
1053                         wlandev->rx.ack++;
1054                         break;
1055                 case WLAN_FSTYPE_CFEND:
1056                         /* printk("cfend"); */
1057                         wlandev->rx.cfend++;
1058                         break;
1059                 case WLAN_FSTYPE_CFENDCFACK:
1060                         /* printk("cfendcfack"); */
1061                         wlandev->rx.cfendcfack++;
1062                         break;
1063                 default:
1064                         /* printk("unknown"); */
1065                         wlandev->rx.ctl_unknown++;
1066                         break;
1067                 }
1068                 /* printk("\n"); */
1069                 drop = 2;
1070                 break;
1071
1072         case WLAN_FTYPE_DATA:
1073                 wlandev->rx.data++;
1074                 switch (fstype) {
1075                 case WLAN_FSTYPE_DATAONLY:
1076                         wlandev->rx.dataonly++;
1077                         break;
1078                 case WLAN_FSTYPE_DATA_CFACK:
1079                         wlandev->rx.data_cfack++;
1080                         break;
1081                 case WLAN_FSTYPE_DATA_CFPOLL:
1082                         wlandev->rx.data_cfpoll++;
1083                         break;
1084                 case WLAN_FSTYPE_DATA_CFACK_CFPOLL:
1085                         wlandev->rx.data__cfack_cfpoll++;
1086                         break;
1087                 case WLAN_FSTYPE_NULL:
1088                         pr_debug("rx'd data:null\n");
1089                         wlandev->rx.null++;
1090                         break;
1091                 case WLAN_FSTYPE_CFACK:
1092                         pr_debug("rx'd data:cfack\n");
1093                         wlandev->rx.cfack++;
1094                         break;
1095                 case WLAN_FSTYPE_CFPOLL:
1096                         pr_debug("rx'd data:cfpoll\n");
1097                         wlandev->rx.cfpoll++;
1098                         break;
1099                 case WLAN_FSTYPE_CFACK_CFPOLL:
1100                         pr_debug("rx'd data:cfack_cfpoll\n");
1101                         wlandev->rx.cfack_cfpoll++;
1102                         break;
1103                 default:
1104                         /* printk("unknown"); */
1105                         wlandev->rx.data_unknown++;
1106                         break;
1107                 }
1108
1109                 break;
1110         }
1111         return drop;
1112 }
1113
1114 static void p80211knetdev_tx_timeout(netdevice_t *netdev)
1115 {
1116         wlandevice_t *wlandev = netdev->ml_priv;
1117
1118         if (wlandev->tx_timeout) {
1119                 wlandev->tx_timeout(wlandev);
1120         } else {
1121                 printk(KERN_WARNING "Implement tx_timeout for %s\n",
1122                        wlandev->nsdname);
1123                 netif_wake_queue(wlandev->netdev);
1124         }
1125 }