drivers/net/wireless/hostap/hostap_main.c

   1 /*
   2  * Host AP (software wireless LAN access point) driver for
   3  * Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <j@w1.fi>
   7  * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation. See README and COPYING for
  12  * more details.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/slab.h>
  18 #include <linux/proc_fs.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/delay.h>
  21 #include <linux/random.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/kmod.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/wireless.h>
  26 #include <linux/etherdevice.h>
  27 #include <net/net_namespace.h>
  28 #include <net/iw_handler.h>
  29 #include <net/lib80211.h>
  30 #include <asm/uaccess.h>
  31
  32 #include "hostap_wlan.h"
  33 #include "hostap_80211.h"
  34 #include "hostap_ap.h"
  35 #include "hostap.h"
  36
  37 MODULE_AUTHOR("Jouni Malinen");
  38 MODULE_DESCRIPTION("Host AP common routines");
  39 MODULE_LICENSE("GPL");
  40
  41 #define TX_TIMEOUT (2 * HZ)
  42
  43 #define PRISM2_MAX_FRAME_SIZE 2304
  44 #define PRISM2_MIN_MTU 256
  45 /* FIX: */
  46 #define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))
  47
  48
  49 struct net_device * hostap_add_interface(struct local_info *local,
  50                                          int type, int rtnl_locked,
  51                                          const char *prefix,
  52                                          const char *name)
  53 {
  54         struct net_device *dev, *mdev;
  55         struct hostap_interface *iface;
  56         int ret;
  57
  58         dev = alloc_etherdev(sizeof(struct hostap_interface));
  59         if (dev == NULL)
  60                 return NULL;
  61
  62         iface = netdev_priv(dev);
  63         iface->dev = dev;
  64         iface->local = local;
  65         iface->type = type;
  66         list_add(&iface->list, &local->hostap_interfaces);
  67
  68         mdev = local->dev;
  69         memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
  70         dev->base_addr = mdev->base_addr;
  71         dev->irq = mdev->irq;
  72         dev->mem_start = mdev->mem_start;
  73         dev->mem_end = mdev->mem_end;
  74
  75         hostap_setup_dev(dev, local, type);
  76         dev->destructor = free_netdev;
  77
  78         sprintf(dev->name, "%s%s", prefix, name);
  79         if (!rtnl_locked)
  80                 rtnl_lock();
  81
  82         ret = 0;
  83         if (strchr(dev->name, '%'))
  84                 ret = dev_alloc_name(dev, dev->name);
  85
  86         SET_NETDEV_DEV(dev, mdev->dev.parent);
  87         if (ret >= 0)
  88                 ret = register_netdevice(dev);
  89
  90         if (!rtnl_locked)
  91                 rtnl_unlock();
  92
  93         if (ret < 0) {
  94                 printk(KERN_WARNING "%s: failed to add new netdevice!\n",
  95                        dev->name);
  96                 free_netdev(dev);
  97                 return NULL;
  98         }
  99
 100         printk(KERN_DEBUG "%s: registered netdevice %s\n",
 101                mdev->name, dev->name);
 102
 103         return dev;
 104 }
 105
 106
 107 void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
 108                              int remove_from_list)
 109 {
 110         struct hostap_interface *iface;
 111
 112         if (!dev)
 113                 return;
 114
 115         iface = netdev_priv(dev);
 116
 117         if (remove_from_list) {
 118                 list_del(&iface->list);
 119         }
 120
 121         if (dev == iface->local->ddev)
 122                 iface->local->ddev = NULL;
 123         else if (dev == iface->local->apdev)
 124                 iface->local->apdev = NULL;
 125         else if (dev == iface->local->stadev)
 126                 iface->local->stadev = NULL;
 127
 128         if (rtnl_locked)
 129                 unregister_netdevice(dev);
 130         else
 131                 unregister_netdev(dev);
 132
 133         /* dev->destructor = free_netdev() will free the device data, including
 134          * private data, when removing the device */
 135 }
 136
 137
 138 static inline int prism2_wds_special_addr(u8 *addr)
 139 {
 140         if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
 141                 return 0;
 142
 143         return 1;
 144 }
 145
 146
 147 int prism2_wds_add(local_info_t *local, u8 *remote_addr,
 148                    int rtnl_locked)
 149 {
 150         struct net_device *dev;
 151         struct list_head *ptr;
 152         struct hostap_interface *iface, *empty, *match;
 153
 154         empty = match = NULL;
 155         read_lock_bh(&local->iface_lock);
 156         list_for_each(ptr, &local->hostap_interfaces) {
 157                 iface = list_entry(ptr, struct hostap_interface, list);
 158                 if (iface->type != HOSTAP_INTERFACE_WDS)
 159                         continue;
 160
 161                 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
 162                         empty = iface;
 163                 else if (memcmp(iface->u.wds.remote_addr, remote_addr,
 164                                 ETH_ALEN) == 0) {
 165                         match = iface;
 166                         break;
 167                 }
 168         }
 169         if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
 170                 /* take pre-allocated entry into use */
 171                 memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
 172                 read_unlock_bh(&local->iface_lock);
 173                 printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
 174                        local->dev->name, empty->dev->name);
 175                 return 0;
 176         }
 177         read_unlock_bh(&local->iface_lock);
 178
 179         if (!prism2_wds_special_addr(remote_addr)) {
 180                 if (match)
 181                         return -EEXIST;
 182                 hostap_add_sta(local->ap, remote_addr);
 183         }
 184
 185         if (local->wds_connections >= local->wds_max_connections)
 186                 return -ENOBUFS;
 187
 188         /* verify that there is room for wds# postfix in the interface name */
 189         if (strlen(local->dev->name) >= IFNAMSIZ - 5) {
 190                 printk(KERN_DEBUG "'%s' too long base device name\n",
 191                        local->dev->name);
 192                 return -EINVAL;
 193         }
 194
 195         dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
 196                                    local->ddev->name, "wds%d");
 197         if (dev == NULL)
 198                 return -ENOMEM;
 199
 200         iface = netdev_priv(dev);
 201         memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
 202
 203         local->wds_connections++;
 204
 205         return 0;
 206 }
 207
 208
 209 int prism2_wds_del(local_info_t *local, u8 *remote_addr,
 210                    int rtnl_locked, int do_not_remove)
 211 {
 212         unsigned long flags;
 213         struct list_head *ptr;
 214         struct hostap_interface *iface, *selected = NULL;
 215
 216         write_lock_irqsave(&local->iface_lock, flags);
 217         list_for_each(ptr, &local->hostap_interfaces) {
 218                 iface = list_entry(ptr, struct hostap_interface, list);
 219                 if (iface->type != HOSTAP_INTERFACE_WDS)
 220                         continue;
 221
 222                 if (memcmp(iface->u.wds.remote_addr, remote_addr,
 223                            ETH_ALEN) == 0) {
 224                         selected = iface;
 225                         break;
 226                 }
 227         }
 228         if (selected && !do_not_remove)
 229                 list_del(&selected->list);
 230         write_unlock_irqrestore(&local->iface_lock, flags);
 231
 232         if (selected) {
 233                 if (do_not_remove)
 234                         memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
 235                 else {
 236                         hostap_remove_interface(selected->dev, rtnl_locked, 0);
 237                         local->wds_connections--;
 238                 }
 239         }
 240
 241         return selected ? 0 : -ENODEV;
 242 }
 243
 244
 245 u16 hostap_tx_callback_register(local_info_t *local,
 246                                 void (*func)(struct sk_buff *, int ok, void *),
 247                                 void *data)
 248 {
 249         unsigned long flags;
 250         struct hostap_tx_callback_info *entry;
 251
 252         entry = kmalloc(sizeof(*entry),
 253                                                            GFP_ATOMIC);
 254         if (entry == NULL)
 255                 return 0;
 256
 257         entry->func = func;
 258         entry->data = data;
 259
 260         spin_lock_irqsave(&local->lock, flags);
 261         entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
 262         entry->next = local->tx_callback;
 263         local->tx_callback = entry;
 264         spin_unlock_irqrestore(&local->lock, flags);
 265
 266         return entry->idx;
 267 }
 268
 269
 270 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
 271 {
 272         unsigned long flags;
 273         struct hostap_tx_callback_info *cb, *prev = NULL;
 274
 275         spin_lock_irqsave(&local->lock, flags);
 276         cb = local->tx_callback;
 277         while (cb != NULL && cb->idx != idx) {
 278                 prev = cb;
 279                 cb = cb->next;
 280         }
 281         if (cb) {
 282                 if (prev == NULL)
 283                         local->tx_callback = cb->next;
 284                 else
 285                         prev->next = cb->next;
 286                 kfree(cb);
 287         }
 288         spin_unlock_irqrestore(&local->lock, flags);
 289
 290         return cb ? 0 : -1;
 291 }
 292
 293
 294 /* val is in host byte order */
 295 int hostap_set_word(struct net_device *dev, int rid, u16 val)
 296 {
 297         struct hostap_interface *iface;
 298         __le16 tmp = cpu_to_le16(val);
 299         iface = netdev_priv(dev);
 300         return iface->local->func->set_rid(dev, rid, &tmp, 2);
 301 }
 302
 303
 304 int hostap_set_string(struct net_device *dev, int rid, const char *val)
 305 {
 306         struct hostap_interface *iface;
 307         char buf[MAX_SSID_LEN + 2];
 308         int len;
 309
 310         iface = netdev_priv(dev);
 311         len = strlen(val);
 312         if (len > MAX_SSID_LEN)
 313                 return -1;
 314         memset(buf, 0, sizeof(buf));
 315         buf[0] = len; /* little endian 16 bit word */
 316         memcpy(buf + 2, val, len);
 317
 318         return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
 319 }
 320
 321
 322 u16 hostap_get_porttype(local_info_t *local)
 323 {
 324         if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
 325                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 326         if (local->iw_mode == IW_MODE_ADHOC)
 327                 return HFA384X_PORTTYPE_IBSS;
 328         if (local->iw_mode == IW_MODE_INFRA)
 329                 return HFA384X_PORTTYPE_BSS;
 330         if (local->iw_mode == IW_MODE_REPEAT)
 331                 return HFA384X_PORTTYPE_WDS;
 332         if (local->iw_mode == IW_MODE_MONITOR)
 333                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 334         return HFA384X_PORTTYPE_HOSTAP;
 335 }
 336
 337
 338 int hostap_set_encryption(local_info_t *local)
 339 {
 340         u16 val, old_val;
 341         int i, keylen, len, idx;
 342         char keybuf[WEP_KEY_LEN + 1];
 343         enum { NONE, WEP, OTHER } encrypt_type;
 344
 345         idx = local->crypt_info.tx_keyidx;
 346         if (local->crypt_info.crypt[idx] == NULL ||
 347             local->crypt_info.crypt[idx]->ops == NULL)
 348                 encrypt_type = NONE;
 349         else if (strcmp(local->crypt_info.crypt[idx]->ops->name, "WEP") == 0)
 350                 encrypt_type = WEP;
 351         else
 352                 encrypt_type = OTHER;
 353
 354         if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
 355                                  1) < 0) {
 356                 printk(KERN_DEBUG "Could not read current WEP flags.\n");
 357                 goto fail;
 358         }
 359         le16_to_cpus(&val);
 360         old_val = val;
 361
 362         if (encrypt_type != NONE || local->privacy_invoked)
 363                 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
 364         else
 365                 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
 366
 367         if (local->open_wep || encrypt_type == NONE ||
 368             ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
 369                 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 370         else
 371                 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 372
 373         if ((encrypt_type != NONE || local->privacy_invoked) &&
 374             (encrypt_type == OTHER || local->host_encrypt))
 375                 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
 376         else
 377                 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
 378         if ((encrypt_type != NONE || local->privacy_invoked) &&
 379             (encrypt_type == OTHER || local->host_decrypt))
 380                 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
 381         else
 382                 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
 383
 384         if (val != old_val &&
 385             hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
 386                 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
 387                        val);
 388                 goto fail;
 389         }
 390
 391         if (encrypt_type != WEP)
 392                 return 0;
 393
 394         /* 104-bit support seems to require that all the keys are set to the
 395          * same keylen */
 396         keylen = 6; /* first 5 octets */
 397         len = local->crypt_info.crypt[idx]->ops->get_key(keybuf, sizeof(keybuf), NULL,
 398                                                            local->crypt_info.crypt[idx]->priv);
 399         if (idx >= 0 && idx < WEP_KEYS && len > 5)
 400                 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
 401
 402         for (i = 0; i < WEP_KEYS; i++) {
 403                 memset(keybuf, 0, sizeof(keybuf));
 404                 if (local->crypt_info.crypt[i]) {
 405                         (void) local->crypt_info.crypt[i]->ops->get_key(
 406                                 keybuf, sizeof(keybuf),
 407                                 NULL, local->crypt_info.crypt[i]->priv);
 408                 }
 409                 if (local->func->set_rid(local->dev,
 410                                          HFA384X_RID_CNFDEFAULTKEY0 + i,
 411                                          keybuf, keylen)) {
 412                         printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
 413                                i, keylen);
 414                         goto fail;
 415                 }
 416         }
 417         if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
 418                 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
 419                 goto fail;
 420         }
 421
 422         return 0;
 423
 424  fail:
 425         printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
 426         return -1;
 427 }
 428
 429
 430 int hostap_set_antsel(local_info_t *local)
 431 {
 432         u16 val;
 433         int ret = 0;
 434
 435         if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 436             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 437                              HFA386X_CR_TX_CONFIGURE,
 438                              NULL, &val) == 0) {
 439                 val &= ~(BIT(2) | BIT(1));
 440                 switch (local->antsel_tx) {
 441                 case HOSTAP_ANTSEL_DIVERSITY:
 442                         val |= BIT(1);
 443                         break;
 444                 case HOSTAP_ANTSEL_LOW:
 445                         break;
 446                 case HOSTAP_ANTSEL_HIGH:
 447                         val |= BIT(2);
 448                         break;
 449                 }
 450
 451                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 452                                      HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
 453                         printk(KERN_INFO "%s: setting TX AntSel failed\n",
 454                                local->dev->name);
 455                         ret = -1;
 456                 }
 457         }
 458
 459         if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 460             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 461                              HFA386X_CR_RX_CONFIGURE,
 462                              NULL, &val) == 0) {
 463                 val &= ~(BIT(1) | BIT(0));
 464                 switch (local->antsel_rx) {
 465                 case HOSTAP_ANTSEL_DIVERSITY:
 466                         break;
 467                 case HOSTAP_ANTSEL_LOW:
 468                         val |= BIT(0);
 469                         break;
 470                 case HOSTAP_ANTSEL_HIGH:
 471                         val |= BIT(0) | BIT(1);
 472                         break;
 473                 }
 474
 475                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 476                                      HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
 477                         printk(KERN_INFO "%s: setting RX AntSel failed\n",
 478                                local->dev->name);
 479                         ret = -1;
 480                 }
 481         }
 482
 483         return ret;
 484 }
 485
 486
 487 int hostap_set_roaming(local_info_t *local)
 488 {
 489         u16 val;
 490
 491         switch (local->host_roaming) {
 492         case 1:
 493                 val = HFA384X_ROAMING_HOST;
 494                 break;
 495         case 2:
 496                 val = HFA384X_ROAMING_DISABLED;
 497                 break;
 498         case 0:
 499         default:
 500                 val = HFA384X_ROAMING_FIRMWARE;
 501                 break;
 502         }
 503
 504         return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
 505 }
 506
 507
 508 int hostap_set_auth_algs(local_info_t *local)
 509 {
 510         int val = local->auth_algs;
 511         /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
 512          * set to include both Open and Shared Key flags. It tries to use
 513          * Shared Key authentication in that case even if WEP keys are not
 514          * configured.. STA f/w v0.7.6 is able to handle such configuration,
 515          * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
 516         if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
 517             val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
 518                 val = PRISM2_AUTH_OPEN;
 519
 520         if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
 521                 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
 522                        "failed\n", local->dev->name, local->auth_algs);
 523                 return -EINVAL;
 524         }
 525
 526         return 0;
 527 }
 528
 529
 530 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
 531 {
 532         u16 status, fc;
 533
 534         status = __le16_to_cpu(rx->status);
 535
 536         printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
 537                "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
 538                "jiffies=%ld\n",
 539                name, status, (status >> 8) & 0x07, status >> 13, status & 1,
 540                rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
 541
 542         fc = __le16_to_cpu(rx->frame_control);
 543         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 544                "data_len=%d%s%s\n",
 545                fc, (fc & IEEE80211_FCTL_FTYPE) >> 2,
 546                (fc & IEEE80211_FCTL_STYPE) >> 4,
 547                __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
 548                __le16_to_cpu(rx->data_len),
 549                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 550                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 551
 552         printk(KERN_DEBUG "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
 553                rx->addr1, rx->addr2, rx->addr3, rx->addr4);
 554
 555         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
 556                rx->dst_addr, rx->src_addr,
 557                __be16_to_cpu(rx->len));
 558 }
 559
 560
 561 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
 562 {
 563         u16 fc;
 564
 565         printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
 566                "tx_control=0x%04x; jiffies=%ld\n",
 567                name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
 568                __le16_to_cpu(tx->tx_control), jiffies);
 569
 570         fc = __le16_to_cpu(tx->frame_control);
 571         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 572                "data_len=%d%s%s\n",
 573                fc, (fc & IEEE80211_FCTL_FTYPE) >> 2,
 574                (fc & IEEE80211_FCTL_STYPE) >> 4,
 575                __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
 576                __le16_to_cpu(tx->data_len),
 577                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 578                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 579
 580         printk(KERN_DEBUG "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
 581                tx->addr1, tx->addr2, tx->addr3, tx->addr4);
 582
 583         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
 584                tx->dst_addr, tx->src_addr,
 585                __be16_to_cpu(tx->len));
 586 }
 587
 588
 589 static int hostap_80211_header_parse(const struct sk_buff *skb,
 590                                      unsigned char *haddr)
 591 {
 592         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
 593         return ETH_ALEN;
 594 }
 595
 596
 597 int hostap_80211_get_hdrlen(__le16 fc)
 598 {
 599         if (ieee80211_is_data(fc) && ieee80211_has_a4 (fc))
 600                 return 30; /* Addr4 */
 601         else if (ieee80211_is_cts(fc) || ieee80211_is_ack(fc))
 602                 return 10;
 603         else if (ieee80211_is_ctl(fc))
 604                 return 16;
 605
 606         return 24;
 607 }
 608
 609
 610 static int prism2_close(struct net_device *dev)
 611 {
 612         struct hostap_interface *iface;
 613         local_info_t *local;
 614
 615         PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
 616
 617         iface = netdev_priv(dev);
 618         local = iface->local;
 619
 620         if (dev == local->ddev) {
 621                 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
 622         }
 623 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 624         if (!local->hostapd && dev == local->dev &&
 625             (!local->func->card_present || local->func->card_present(local)) &&
 626             local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
 627                 hostap_deauth_all_stas(dev, local->ap, 1);
 628 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 629
 630         if (dev == local->dev) {
 631                 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
 632         }
 633
 634         if (netif_running(dev)) {
 635                 netif_stop_queue(dev);
 636                 netif_device_detach(dev);
 637         }
 638
 639         cancel_work_sync(&local->reset_queue);
 640         cancel_work_sync(&local->set_multicast_list_queue);
 641         cancel_work_sync(&local->set_tim_queue);
 642 #ifndef PRISM2_NO_STATION_MODES
 643         cancel_work_sync(&local->info_queue);
 644 #endif
 645         cancel_work_sync(&local->comms_qual_update);
 646
 647         module_put(local->hw_module);
 648
 649         local->num_dev_open--;
 650
 651         if (dev != local->dev && local->dev->flags & IFF_UP &&
 652             local->master_dev_auto_open && local->num_dev_open == 1) {
 653                 /* Close master radio interface automatically if it was also
 654                  * opened automatically and we are now closing the last
 655                  * remaining non-master device. */
 656                 dev_close(local->dev);
 657         }
 658
 659         return 0;
 660 }
 661
 662
 663 static int prism2_open(struct net_device *dev)
 664 {
 665         struct hostap_interface *iface;
 666         local_info_t *local;
 667
 668         PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
 669
 670         iface = netdev_priv(dev);
 671         local = iface->local;
 672
 673         if (local->no_pri) {
 674                 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
 675                        "f/w\n", dev->name);
 676                 return 1;
 677         }
 678
 679         if ((local->func->card_present && !local->func->card_present(local)) ||
 680             local->hw_downloading)
 681                 return -ENODEV;
 682
 683         if (!try_module_get(local->hw_module))
 684                 return -ENODEV;
 685         local->num_dev_open++;
 686
 687         if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
 688                 printk(KERN_WARNING "%s: could not enable MAC port\n",
 689                        dev->name);
 690                 prism2_close(dev);
 691                 return 1;
 692         }
 693         if (!local->dev_enabled)
 694                 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
 695         local->dev_enabled = 1;
 696
 697         if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
 698                 /* Master radio interface is needed for all operation, so open
 699                  * it automatically when any virtual net_device is opened. */
 700                 local->master_dev_auto_open = 1;
 701                 dev_open(local->dev);
 702         }
 703
 704         netif_device_attach(dev);
 705         netif_start_queue(dev);
 706
 707         return 0;
 708 }
 709
 710
 711 static int prism2_set_mac_address(struct net_device *dev, void *p)
 712 {
 713         struct hostap_interface *iface;
 714         local_info_t *local;
 715         struct list_head *ptr;
 716         struct sockaddr *addr = p;
 717
 718         iface = netdev_priv(dev);
 719         local = iface->local;
 720
 721         if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
 722                                  ETH_ALEN) < 0 || local->func->reset_port(dev))
 723                 return -EINVAL;
 724
 725         read_lock_bh(&local->iface_lock);
 726         list_for_each(ptr, &local->hostap_interfaces) {
 727                 iface = list_entry(ptr, struct hostap_interface, list);
 728                 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
 729         }
 730         memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
 731         read_unlock_bh(&local->iface_lock);
 732
 733         return 0;
 734 }
 735
 736
 737 /* TODO: to be further implemented as soon as Prism2 fully supports
 738  *       GroupAddresses and correct documentation is available */
 739 void hostap_set_multicast_list_queue(struct work_struct *work)
 740 {
 741         local_info_t *local =
 742                 container_of(work, local_info_t, set_multicast_list_queue);
 743         struct net_device *dev = local->dev;
 744
 745         if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
 746                             local->is_promisc)) {
 747                 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
 748                        dev->name, local->is_promisc ? "en" : "dis");
 749         }
 750 }
 751
 752
 753 static void hostap_set_multicast_list(struct net_device *dev)
 754 {
 755 #if 0
 756         /* FIX: promiscuous mode seems to be causing a lot of problems with
 757          * some station firmware versions (FCSErr frames, invalid MACPort, etc.
 758          * corrupted incoming frames). This code is now commented out while the
 759          * problems are investigated. */
 760         struct hostap_interface *iface;
 761         local_info_t *local;
 762
 763         iface = netdev_priv(dev);
 764         local = iface->local;
 765         if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
 766                 local->is_promisc = 1;
 767         } else {
 768                 local->is_promisc = 0;
 769         }
 770
 771         schedule_work(&local->set_multicast_list_queue);
 772 #endif
 773 }
 774
 775
 776 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
 777 {
 778         if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
 779                 return -EINVAL;
 780
 781         dev->mtu = new_mtu;
 782         return 0;
 783 }
 784
 785
 786 static void prism2_tx_timeout(struct net_device *dev)
 787 {
 788         struct hostap_interface *iface;
 789         local_info_t *local;
 790         struct hfa384x_regs regs;
 791
 792         iface = netdev_priv(dev);
 793         local = iface->local;
 794
 795         printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
 796         netif_stop_queue(local->dev);
 797
 798         local->func->read_regs(dev, &regs);
 799         printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
 800                "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
 801                dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
 802                regs.swsupport0);
 803
 804         local->func->schedule_reset(local);
 805 }
 806
 807 const struct header_ops hostap_80211_ops = {
 808         .create         = eth_header,
 809         .rebuild        = eth_rebuild_header,
 810         .cache          = eth_header_cache,
 811         .cache_update   = eth_header_cache_update,
 812         .parse          = hostap_80211_header_parse,
 813 };
 814 EXPORT_SYMBOL(hostap_80211_ops);
 815
 816
 817 static const struct net_device_ops hostap_netdev_ops = {
 818         .ndo_start_xmit         = hostap_data_start_xmit,
 819
 820         .ndo_open               = prism2_open,
 821         .ndo_stop               = prism2_close,
 822         .ndo_do_ioctl           = hostap_ioctl,
 823         .ndo_set_mac_address    = prism2_set_mac_address,
 824         .ndo_set_multicast_list = hostap_set_multicast_list,
 825         .ndo_change_mtu         = prism2_change_mtu,
 826         .ndo_tx_timeout         = prism2_tx_timeout,
 827         .ndo_validate_addr      = eth_validate_addr,
 828 };
 829
 830 static const struct net_device_ops hostap_mgmt_netdev_ops = {
 831         .ndo_start_xmit         = hostap_mgmt_start_xmit,
 832
 833         .ndo_open               = prism2_open,
 834         .ndo_stop               = prism2_close,
 835         .ndo_do_ioctl           = hostap_ioctl,
 836         .ndo_set_mac_address    = prism2_set_mac_address,
 837         .ndo_set_multicast_list = hostap_set_multicast_list,
 838         .ndo_change_mtu         = prism2_change_mtu,
 839         .ndo_tx_timeout         = prism2_tx_timeout,
 840         .ndo_validate_addr      = eth_validate_addr,
 841 };
 842
 843 static const struct net_device_ops hostap_master_ops = {
 844         .ndo_start_xmit         = hostap_master_start_xmit,
 845
 846         .ndo_open               = prism2_open,
 847         .ndo_stop               = prism2_close,
 848         .ndo_do_ioctl           = hostap_ioctl,
 849         .ndo_set_mac_address    = prism2_set_mac_address,
 850         .ndo_set_multicast_list = hostap_set_multicast_list,
 851         .ndo_change_mtu         = prism2_change_mtu,
 852         .ndo_tx_timeout         = prism2_tx_timeout,
 853         .ndo_validate_addr      = eth_validate_addr,
 854 };
 855
 856 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
 857                       int type)
 858 {
 859         struct hostap_interface *iface;
 860
 861         iface = netdev_priv(dev);
 862         ether_setup(dev);
 863
 864         /* kernel callbacks */
 865         if (iface) {
 866                 /* Currently, we point to the proper spy_data only on
 867                  * the main_dev. This could be fixed. Jean II */
 868                 iface->wireless_data.spy_data = &iface->spy_data;
 869                 dev->wireless_data = &iface->wireless_data;
 870         }
 871         dev->wireless_handlers = &hostap_iw_handler_def;
 872         dev->watchdog_timeo = TX_TIMEOUT;
 873
 874         switch(type) {
 875         case HOSTAP_INTERFACE_AP:
 876                 dev->tx_queue_len = 0;  /* use main radio device queue */
 877                 dev->netdev_ops = &hostap_mgmt_netdev_ops;
 878                 dev->type = ARPHRD_IEEE80211;
 879                 dev->header_ops = &hostap_80211_ops;
 880                 break;
 881         case HOSTAP_INTERFACE_MASTER:
 882                 dev->netdev_ops = &hostap_master_ops;
 883                 break;
 884         default:
 885                 dev->tx_queue_len = 0;  /* use main radio device queue */
 886                 dev->netdev_ops = &hostap_netdev_ops;
 887         }
 888
 889         dev->mtu = local->mtu;
 890
 891
 892         SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
 893
 894         netif_stop_queue(dev);
 895 }
 896
 897 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
 898 {
 899         struct net_device *dev = local->dev;
 900
 901         if (local->apdev)
 902                 return -EEXIST;
 903
 904         printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
 905
 906         local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
 907                                             rtnl_locked, local->ddev->name,
 908                                             "ap");
 909         if (local->apdev == NULL)
 910                 return -ENOMEM;
 911
 912         return 0;
 913 }
 914
 915
 916 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
 917 {
 918         struct net_device *dev = local->dev;
 919
 920         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 921
 922         hostap_remove_interface(local->apdev, rtnl_locked, 1);
 923         local->apdev = NULL;
 924
 925         return 0;
 926 }
 927
 928
 929 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
 930 {
 931         struct net_device *dev = local->dev;
 932
 933         if (local->stadev)
 934                 return -EEXIST;
 935
 936         printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
 937
 938         local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
 939                                              rtnl_locked, local->ddev->name,
 940                                              "sta");
 941         if (local->stadev == NULL)
 942                 return -ENOMEM;
 943
 944         return 0;
 945 }
 946
 947
 948 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
 949 {
 950         struct net_device *dev = local->dev;
 951
 952         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 953
 954         hostap_remove_interface(local->stadev, rtnl_locked, 1);
 955         local->stadev = NULL;
 956
 957         return 0;
 958 }
 959
 960
 961 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
 962 {
 963         int ret;
 964
 965         if (val < 0 || val > 1)
 966                 return -EINVAL;
 967
 968         if (local->hostapd == val)
 969                 return 0;
 970
 971         if (val) {
 972                 ret = hostap_enable_hostapd(local, rtnl_locked);
 973                 if (ret == 0)
 974                         local->hostapd = 1;
 975         } else {
 976                 local->hostapd = 0;
 977                 ret = hostap_disable_hostapd(local, rtnl_locked);
 978                 if (ret != 0)
 979                         local->hostapd = 1;
 980         }
 981
 982         return ret;
 983 }
 984
 985
 986 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
 987 {
 988         int ret;
 989
 990         if (val < 0 || val > 1)
 991                 return -EINVAL;
 992
 993         if (local->hostapd_sta == val)
 994                 return 0;
 995
 996         if (val) {
 997                 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
 998                 if (ret == 0)
 999                         local->hostapd_sta = 1;
1000         } else {
1001                 local->hostapd_sta = 0;
1002                 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
1003                 if (ret != 0)
1004                         local->hostapd_sta = 1;
1005         }
1006
1007
1008         return ret;
1009 }
1010
1011
1012 int prism2_update_comms_qual(struct net_device *dev)
1013 {
1014         struct hostap_interface *iface;
1015         local_info_t *local;
1016         int ret = 0;
1017         struct hfa384x_comms_quality sq;
1018
1019         iface = netdev_priv(dev);
1020         local = iface->local;
1021         if (!local->sta_fw_ver)
1022                 ret = -1;
1023         else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1024                 if (local->func->get_rid(local->dev,
1025                                          HFA384X_RID_DBMCOMMSQUALITY,
1026                                          &sq, sizeof(sq), 1) >= 0) {
1027                         local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1028                         local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1029                         local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1030                         local->last_comms_qual_update = jiffies;
1031                 } else
1032                         ret = -1;
1033         } else {
1034                 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1035                                          &sq, sizeof(sq), 1) >= 0) {
1036                         local->comms_qual = le16_to_cpu(sq.comm_qual);
1037                         local->avg_signal = HFA384X_LEVEL_TO_dBm(
1038                                 le16_to_cpu(sq.signal_level));
1039                         local->avg_noise = HFA384X_LEVEL_TO_dBm(
1040                                 le16_to_cpu(sq.noise_level));
1041                         local->last_comms_qual_update = jiffies;
1042                 } else
1043                         ret = -1;
1044         }
1045
1046         return ret;
1047 }
1048
1049
1050 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1051                          u8 *body, size_t bodylen)
1052 {
1053         struct sk_buff *skb;
1054         struct hostap_ieee80211_mgmt *mgmt;
1055         struct hostap_skb_tx_data *meta;
1056         struct net_device *dev = local->dev;
1057
1058         skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1059         if (skb == NULL)
1060                 return -ENOMEM;
1061
1062         mgmt = (struct hostap_ieee80211_mgmt *)
1063                 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1064         memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1065         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1066         memcpy(mgmt->da, dst, ETH_ALEN);
1067         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1068         memcpy(mgmt->bssid, dst, ETH_ALEN);
1069         if (body)
1070                 memcpy(skb_put(skb, bodylen), body, bodylen);
1071
1072         meta = (struct hostap_skb_tx_data *) skb->cb;
1073         memset(meta, 0, sizeof(*meta));
1074         meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1075         meta->iface = netdev_priv(dev);
1076
1077         skb->dev = dev;
1078         skb_reset_mac_header(skb);
1079         skb_reset_network_header(skb);
1080         dev_queue_xmit(skb);
1081
1082         return 0;
1083 }
1084
1085
1086 int prism2_sta_deauth(local_info_t *local, u16 reason)
1087 {
1088         union iwreq_data wrqu;
1089         int ret;
1090         __le16 val = cpu_to_le16(reason);
1091
1092         if (local->iw_mode != IW_MODE_INFRA ||
1093             memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1094             memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1095                 return 0;
1096
1097         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1098                                    (u8 *) &val, 2);
1099         memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1100         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1101         return ret;
1102 }
1103
1104
1105 struct proc_dir_entry *hostap_proc;
1106
1107 static int __init hostap_init(void)
1108 {
1109         if (init_net.proc_net != NULL) {
1110                 hostap_proc = proc_mkdir("hostap", init_net.proc_net);
1111                 if (!hostap_proc)
1112                         printk(KERN_WARNING "Failed to mkdir "
1113                                "/proc/net/hostap\n");
1114         } else
1115                 hostap_proc = NULL;
1116
1117         return 0;
1118 }
1119
1120
1121 static void __exit hostap_exit(void)
1122 {
1123         if (hostap_proc != NULL) {
1124                 hostap_proc = NULL;
1125                 remove_proc_entry("hostap", init_net.proc_net);
1126         }
1127 }
1128
1129
1130 EXPORT_SYMBOL(hostap_set_word);
1131 EXPORT_SYMBOL(hostap_set_string);
1132 EXPORT_SYMBOL(hostap_get_porttype);
1133 EXPORT_SYMBOL(hostap_set_encryption);
1134 EXPORT_SYMBOL(hostap_set_antsel);
1135 EXPORT_SYMBOL(hostap_set_roaming);
1136 EXPORT_SYMBOL(hostap_set_auth_algs);
1137 EXPORT_SYMBOL(hostap_dump_rx_header);
1138 EXPORT_SYMBOL(hostap_dump_tx_header);
1139 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1140 EXPORT_SYMBOL(hostap_setup_dev);
1141 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1142 EXPORT_SYMBOL(hostap_set_hostapd);
1143 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1144 EXPORT_SYMBOL(hostap_add_interface);
1145 EXPORT_SYMBOL(hostap_remove_interface);
1146 EXPORT_SYMBOL(prism2_update_comms_qual);
1147
1148 module_init(hostap_init);
1149 module_exit(hostap_exit);