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