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         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),
 248                                                            GFP_ATOMIC);
 249         if (entry == NULL)
 250                 return 0;
 251
 252         entry->func = func;
 253         entry->data = data;
 254
 255         spin_lock_irqsave(&local->lock, flags);
 256         entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
 257         entry->next = local->tx_callback;
 258         local->tx_callback = entry;
 259         spin_unlock_irqrestore(&local->lock, flags);
 260
 261         return entry->idx;
 262 }
 263
 264
 265 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
 266 {
 267         unsigned long flags;
 268         struct hostap_tx_callback_info *cb, *prev = NULL;
 269
 270         spin_lock_irqsave(&local->lock, flags);
 271         cb = local->tx_callback;
 272         while (cb != NULL && cb->idx != idx) {
 273                 prev = cb;
 274                 cb = cb->next;
 275         }
 276         if (cb) {
 277                 if (prev == NULL)
 278                         local->tx_callback = cb->next;
 279                 else
 280                         prev->next = cb->next;
 281                 kfree(cb);
 282         }
 283         spin_unlock_irqrestore(&local->lock, flags);
 284
 285         return cb ? 0 : -1;
 286 }
 287
 288
 289 /* val is in host byte order */
 290 int hostap_set_word(struct net_device *dev, int rid, u16 val)
 291 {
 292         struct hostap_interface *iface;
 293         __le16 tmp = cpu_to_le16(val);
 294         iface = netdev_priv(dev);
 295         return iface->local->func->set_rid(dev, rid, &tmp, 2);
 296 }
 297
 298
 299 int hostap_set_string(struct net_device *dev, int rid, const char *val)
 300 {
 301         struct hostap_interface *iface;
 302         char buf[MAX_SSID_LEN + 2];
 303         int len;
 304
 305         iface = netdev_priv(dev);
 306         len = strlen(val);
 307         if (len > MAX_SSID_LEN)
 308                 return -1;
 309         memset(buf, 0, sizeof(buf));
 310         buf[0] = len; /* little endian 16 bit word */
 311         memcpy(buf + 2, val, len);
 312
 313         return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
 314 }
 315
 316
 317 u16 hostap_get_porttype(local_info_t *local)
 318 {
 319         if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
 320                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 321         if (local->iw_mode == IW_MODE_ADHOC)
 322                 return HFA384X_PORTTYPE_IBSS;
 323         if (local->iw_mode == IW_MODE_INFRA)
 324                 return HFA384X_PORTTYPE_BSS;
 325         if (local->iw_mode == IW_MODE_REPEAT)
 326                 return HFA384X_PORTTYPE_WDS;
 327         if (local->iw_mode == IW_MODE_MONITOR)
 328                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 329         return HFA384X_PORTTYPE_HOSTAP;
 330 }
 331
 332
 333 int hostap_set_encryption(local_info_t *local)
 334 {
 335         u16 val, old_val;
 336         int i, keylen, len, idx;
 337         char keybuf[WEP_KEY_LEN + 1];
 338         enum { NONE, WEP, OTHER } encrypt_type;
 339
 340         idx = local->crypt_info.tx_keyidx;
 341         if (local->crypt_info.crypt[idx] == NULL ||
 342             local->crypt_info.crypt[idx]->ops == NULL)
 343                 encrypt_type = NONE;
 344         else if (strcmp(local->crypt_info.crypt[idx]->ops->name, "WEP") == 0)
 345                 encrypt_type = WEP;
 346         else
 347                 encrypt_type = OTHER;
 348
 349         if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
 350                                  1) < 0) {
 351                 printk(KERN_DEBUG "Could not read current WEP flags.\n");
 352                 goto fail;
 353         }
 354         le16_to_cpus(&val);
 355         old_val = val;
 356
 357         if (encrypt_type != NONE || local->privacy_invoked)
 358                 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
 359         else
 360                 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
 361
 362         if (local->open_wep || encrypt_type == NONE ||
 363             ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
 364                 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 365         else
 366                 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 367
 368         if ((encrypt_type != NONE || local->privacy_invoked) &&
 369             (encrypt_type == OTHER || local->host_encrypt))
 370                 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
 371         else
 372                 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
 373         if ((encrypt_type != NONE || local->privacy_invoked) &&
 374             (encrypt_type == OTHER || local->host_decrypt))
 375                 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
 376         else
 377                 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
 378
 379         if (val != old_val &&
 380             hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
 381                 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
 382                        val);
 383                 goto fail;
 384         }
 385
 386         if (encrypt_type != WEP)
 387                 return 0;
 388
 389         /* 104-bit support seems to require that all the keys are set to the
 390          * same keylen */
 391         keylen = 6; /* first 5 octets */
 392         len = local->crypt_info.crypt[idx]->ops->get_key(keybuf, sizeof(keybuf), NULL,
 393                                                            local->crypt_info.crypt[idx]->priv);
 394         if (idx >= 0 && idx < WEP_KEYS && len > 5)
 395                 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
 396
 397         for (i = 0; i < WEP_KEYS; i++) {
 398                 memset(keybuf, 0, sizeof(keybuf));
 399                 if (local->crypt_info.crypt[i]) {
 400                         (void) local->crypt_info.crypt[i]->ops->get_key(
 401                                 keybuf, sizeof(keybuf),
 402                                 NULL, local->crypt_info.crypt[i]->priv);
 403                 }
 404                 if (local->func->set_rid(local->dev,
 405                                          HFA384X_RID_CNFDEFAULTKEY0 + i,
 406                                          keybuf, keylen)) {
 407                         printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
 408                                i, keylen);
 409                         goto fail;
 410                 }
 411         }
 412         if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
 413                 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
 414                 goto fail;
 415         }
 416
 417         return 0;
 418
 419  fail:
 420         printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
 421         return -1;
 422 }
 423
 424
 425 int hostap_set_antsel(local_info_t *local)
 426 {
 427         u16 val;
 428         int ret = 0;
 429
 430         if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 431             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 432                              HFA386X_CR_TX_CONFIGURE,
 433                              NULL, &val) == 0) {
 434                 val &= ~(BIT(2) | BIT(1));
 435                 switch (local->antsel_tx) {
 436                 case HOSTAP_ANTSEL_DIVERSITY:
 437                         val |= BIT(1);
 438                         break;
 439                 case HOSTAP_ANTSEL_LOW:
 440                         break;
 441                 case HOSTAP_ANTSEL_HIGH:
 442                         val |= BIT(2);
 443                         break;
 444                 }
 445
 446                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 447                                      HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
 448                         printk(KERN_INFO "%s: setting TX AntSel failed\n",
 449                                local->dev->name);
 450                         ret = -1;
 451                 }
 452         }
 453
 454         if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 455             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 456                              HFA386X_CR_RX_CONFIGURE,
 457                              NULL, &val) == 0) {
 458                 val &= ~(BIT(1) | BIT(0));
 459                 switch (local->antsel_rx) {
 460                 case HOSTAP_ANTSEL_DIVERSITY:
 461                         break;
 462                 case HOSTAP_ANTSEL_LOW:
 463                         val |= BIT(0);
 464                         break;
 465                 case HOSTAP_ANTSEL_HIGH:
 466                         val |= BIT(0) | BIT(1);
 467                         break;
 468                 }
 469
 470                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 471                                      HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
 472                         printk(KERN_INFO "%s: setting RX AntSel failed\n",
 473                                local->dev->name);
 474                         ret = -1;
 475                 }
 476         }
 477
 478         return ret;
 479 }
 480
 481
 482 int hostap_set_roaming(local_info_t *local)
 483 {
 484         u16 val;
 485
 486         switch (local->host_roaming) {
 487         case 1:
 488                 val = HFA384X_ROAMING_HOST;
 489                 break;
 490         case 2:
 491                 val = HFA384X_ROAMING_DISABLED;
 492                 break;
 493         case 0:
 494         default:
 495                 val = HFA384X_ROAMING_FIRMWARE;
 496                 break;
 497         }
 498
 499         return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
 500 }
 501
 502
 503 int hostap_set_auth_algs(local_info_t *local)
 504 {
 505         int val = local->auth_algs;
 506         /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
 507          * set to include both Open and Shared Key flags. It tries to use
 508          * Shared Key authentication in that case even if WEP keys are not
 509          * configured.. STA f/w v0.7.6 is able to handle such configuration,
 510          * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
 511         if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
 512             val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
 513                 val = PRISM2_AUTH_OPEN;
 514
 515         if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
 516                 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
 517                        "failed\n", local->dev->name, local->auth_algs);
 518                 return -EINVAL;
 519         }
 520
 521         return 0;
 522 }
 523
 524
 525 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
 526 {
 527         u16 status, fc;
 528
 529         status = __le16_to_cpu(rx->status);
 530
 531         printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
 532                "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
 533                "jiffies=%ld\n",
 534                name, status, (status >> 8) & 0x07, status >> 13, status & 1,
 535                rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
 536
 537         fc = __le16_to_cpu(rx->frame_control);
 538         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 539                "data_len=%d%s%s\n",
 540                fc, (fc & IEEE80211_FCTL_FTYPE) >> 2,
 541                (fc & IEEE80211_FCTL_STYPE) >> 4,
 542                __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
 543                __le16_to_cpu(rx->data_len),
 544                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 545                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 546
 547         printk(KERN_DEBUG "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
 548                rx->addr1, rx->addr2, rx->addr3, rx->addr4);
 549
 550         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
 551                rx->dst_addr, rx->src_addr,
 552                __be16_to_cpu(rx->len));
 553 }
 554
 555
 556 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
 557 {
 558         u16 fc;
 559
 560         printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
 561                "tx_control=0x%04x; jiffies=%ld\n",
 562                name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
 563                __le16_to_cpu(tx->tx_control), jiffies);
 564
 565         fc = __le16_to_cpu(tx->frame_control);
 566         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 567                "data_len=%d%s%s\n",
 568                fc, (fc & IEEE80211_FCTL_FTYPE) >> 2,
 569                (fc & IEEE80211_FCTL_STYPE) >> 4,
 570                __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
 571                __le16_to_cpu(tx->data_len),
 572                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 573                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 574
 575         printk(KERN_DEBUG "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
 576                tx->addr1, tx->addr2, tx->addr3, tx->addr4);
 577
 578         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
 579                tx->dst_addr, tx->src_addr,
 580                __be16_to_cpu(tx->len));
 581 }
 582
 583
 584 static int hostap_80211_header_parse(const struct sk_buff *skb,
 585                                      unsigned char *haddr)
 586 {
 587         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
 588         return ETH_ALEN;
 589 }
 590
 591
 592 int hostap_80211_get_hdrlen(__le16 fc)
 593 {
 594         if (ieee80211_is_data(fc) && ieee80211_has_a4 (fc))
 595                 return 30; /* Addr4 */
 596         else if (ieee80211_is_cts(fc) || ieee80211_is_ack(fc))
 597                 return 10;
 598         else if (ieee80211_is_ctl(fc))
 599                 return 16;
 600
 601         return 24;
 602 }
 603
 604
 605 static int prism2_close(struct net_device *dev)
 606 {
 607         struct hostap_interface *iface;
 608         local_info_t *local;
 609
 610         PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
 611
 612         iface = netdev_priv(dev);
 613         local = iface->local;
 614
 615         if (dev == local->ddev) {
 616                 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
 617         }
 618 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 619         if (!local->hostapd && dev == local->dev &&
 620             (!local->func->card_present || local->func->card_present(local)) &&
 621             local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
 622                 hostap_deauth_all_stas(dev, local->ap, 1);
 623 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 624
 625         if (dev == local->dev) {
 626                 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
 627         }
 628
 629         if (netif_running(dev)) {
 630                 netif_stop_queue(dev);
 631                 netif_device_detach(dev);
 632         }
 633
 634         cancel_work_sync(&local->reset_queue);
 635         cancel_work_sync(&local->set_multicast_list_queue);
 636         cancel_work_sync(&local->set_tim_queue);
 637 #ifndef PRISM2_NO_STATION_MODES
 638         cancel_work_sync(&local->info_queue);
 639 #endif
 640         cancel_work_sync(&local->comms_qual_update);
 641
 642         module_put(local->hw_module);
 643
 644         local->num_dev_open--;
 645
 646         if (dev != local->dev && local->dev->flags & IFF_UP &&
 647             local->master_dev_auto_open && local->num_dev_open == 1) {
 648                 /* Close master radio interface automatically if it was also
 649                  * opened automatically and we are now closing the last
 650                  * remaining non-master device. */
 651                 dev_close(local->dev);
 652         }
 653
 654         return 0;
 655 }
 656
 657
 658 static int prism2_open(struct net_device *dev)
 659 {
 660         struct hostap_interface *iface;
 661         local_info_t *local;
 662
 663         PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
 664
 665         iface = netdev_priv(dev);
 666         local = iface->local;
 667
 668         if (local->no_pri) {
 669                 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
 670                        "f/w\n", dev->name);
 671                 return 1;
 672         }
 673
 674         if ((local->func->card_present && !local->func->card_present(local)) ||
 675             local->hw_downloading)
 676                 return -ENODEV;
 677
 678         if (!try_module_get(local->hw_module))
 679                 return -ENODEV;
 680         local->num_dev_open++;
 681
 682         if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
 683                 printk(KERN_WARNING "%s: could not enable MAC port\n",
 684                        dev->name);
 685                 prism2_close(dev);
 686                 return 1;
 687         }
 688         if (!local->dev_enabled)
 689                 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
 690         local->dev_enabled = 1;
 691
 692         if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
 693                 /* Master radio interface is needed for all operation, so open
 694                  * it automatically when any virtual net_device is opened. */
 695                 local->master_dev_auto_open = 1;
 696                 dev_open(local->dev);
 697         }
 698
 699         netif_device_attach(dev);
 700         netif_start_queue(dev);
 701
 702         return 0;
 703 }
 704
 705
 706 static int prism2_set_mac_address(struct net_device *dev, void *p)
 707 {
 708         struct hostap_interface *iface;
 709         local_info_t *local;
 710         struct list_head *ptr;
 711         struct sockaddr *addr = p;
 712
 713         iface = netdev_priv(dev);
 714         local = iface->local;
 715
 716         if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
 717                                  ETH_ALEN) < 0 || local->func->reset_port(dev))
 718                 return -EINVAL;
 719
 720         read_lock_bh(&local->iface_lock);
 721         list_for_each(ptr, &local->hostap_interfaces) {
 722                 iface = list_entry(ptr, struct hostap_interface, list);
 723                 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
 724         }
 725         memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
 726         read_unlock_bh(&local->iface_lock);
 727
 728         return 0;
 729 }
 730
 731
 732 /* TODO: to be further implemented as soon as Prism2 fully supports
 733  *       GroupAddresses and correct documentation is available */
 734 void hostap_set_multicast_list_queue(struct work_struct *work)
 735 {
 736         local_info_t *local =
 737                 container_of(work, local_info_t, set_multicast_list_queue);
 738         struct net_device *dev = local->dev;
 739
 740         if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
 741                             local->is_promisc)) {
 742                 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
 743                        dev->name, local->is_promisc ? "en" : "dis");
 744         }
 745 }
 746
 747
 748 static void hostap_set_multicast_list(struct net_device *dev)
 749 {
 750 #if 0
 751         /* FIX: promiscuous mode seems to be causing a lot of problems with
 752          * some station firmware versions (FCSErr frames, invalid MACPort, etc.
 753          * corrupted incoming frames). This code is now commented out while the
 754          * problems are investigated. */
 755         struct hostap_interface *iface;
 756         local_info_t *local;
 757
 758         iface = netdev_priv(dev);
 759         local = iface->local;
 760         if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
 761                 local->is_promisc = 1;
 762         } else {
 763                 local->is_promisc = 0;
 764         }
 765
 766         schedule_work(&local->set_multicast_list_queue);
 767 #endif
 768 }
 769
 770
 771 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
 772 {
 773         if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
 774                 return -EINVAL;
 775
 776         dev->mtu = new_mtu;
 777         return 0;
 778 }
 779
 780
 781 static void prism2_tx_timeout(struct net_device *dev)
 782 {
 783         struct hostap_interface *iface;
 784         local_info_t *local;
 785         struct hfa384x_regs regs;
 786
 787         iface = netdev_priv(dev);
 788         local = iface->local;
 789
 790         printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
 791         netif_stop_queue(local->dev);
 792
 793         local->func->read_regs(dev, &regs);
 794         printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
 795                "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
 796                dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
 797                regs.swsupport0);
 798
 799         local->func->schedule_reset(local);
 800 }
 801
 802 const struct header_ops hostap_80211_ops = {
 803         .create         = eth_header,
 804         .rebuild        = eth_rebuild_header,
 805         .cache          = eth_header_cache,
 806         .cache_update   = eth_header_cache_update,
 807         .parse          = hostap_80211_header_parse,
 808 };
 809 EXPORT_SYMBOL(hostap_80211_ops);
 810
 811
 812 static const struct net_device_ops hostap_netdev_ops = {
 813         .ndo_start_xmit         = hostap_data_start_xmit,
 814
 815         .ndo_open               = prism2_open,
 816         .ndo_stop               = prism2_close,
 817         .ndo_do_ioctl           = hostap_ioctl,
 818         .ndo_set_mac_address    = prism2_set_mac_address,
 819         .ndo_set_multicast_list = hostap_set_multicast_list,
 820         .ndo_change_mtu         = prism2_change_mtu,
 821         .ndo_tx_timeout         = prism2_tx_timeout,
 822         .ndo_validate_addr      = eth_validate_addr,
 823 };
 824
 825 static const struct net_device_ops hostap_mgmt_netdev_ops = {
 826         .ndo_start_xmit         = hostap_mgmt_start_xmit,
 827
 828         .ndo_open               = prism2_open,
 829         .ndo_stop               = prism2_close,
 830         .ndo_do_ioctl           = hostap_ioctl,
 831         .ndo_set_mac_address    = prism2_set_mac_address,
 832         .ndo_set_multicast_list = hostap_set_multicast_list,
 833         .ndo_change_mtu         = prism2_change_mtu,
 834         .ndo_tx_timeout         = prism2_tx_timeout,
 835         .ndo_validate_addr      = eth_validate_addr,
 836 };
 837
 838 static const struct net_device_ops hostap_master_ops = {
 839         .ndo_start_xmit         = hostap_master_start_xmit,
 840
 841         .ndo_open               = prism2_open,
 842         .ndo_stop               = prism2_close,
 843         .ndo_do_ioctl           = hostap_ioctl,
 844         .ndo_set_mac_address    = prism2_set_mac_address,
 845         .ndo_set_multicast_list = hostap_set_multicast_list,
 846         .ndo_change_mtu         = prism2_change_mtu,
 847         .ndo_tx_timeout         = prism2_tx_timeout,
 848         .ndo_validate_addr      = eth_validate_addr,
 849 };
 850
 851 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
 852                       int type)
 853 {
 854         struct hostap_interface *iface;
 855
 856         iface = netdev_priv(dev);
 857         ether_setup(dev);
 858         dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 859
 860         /* kernel callbacks */
 861         if (iface) {
 862                 /* Currently, we point to the proper spy_data only on
 863                  * the main_dev. This could be fixed. Jean II */
 864                 iface->wireless_data.spy_data = &iface->spy_data;
 865                 dev->wireless_data = &iface->wireless_data;
 866         }
 867         dev->wireless_handlers = &hostap_iw_handler_def;
 868         dev->watchdog_timeo = TX_TIMEOUT;
 869
 870         switch(type) {
 871         case HOSTAP_INTERFACE_AP:
 872                 dev->tx_queue_len = 0;  /* use main radio device queue */
 873                 dev->netdev_ops = &hostap_mgmt_netdev_ops;
 874                 dev->type = ARPHRD_IEEE80211;
 875                 dev->header_ops = &hostap_80211_ops;
 876                 break;
 877         case HOSTAP_INTERFACE_MASTER:
 878                 dev->netdev_ops = &hostap_master_ops;
 879                 break;
 880         default:
 881                 dev->tx_queue_len = 0;  /* use main radio device queue */
 882                 dev->netdev_ops = &hostap_netdev_ops;
 883         }
 884
 885         dev->mtu = local->mtu;
 886
 887
 888         SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
 889
 890 }
 891
 892 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
 893 {
 894         struct net_device *dev = local->dev;
 895
 896         if (local->apdev)
 897                 return -EEXIST;
 898
 899         printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
 900
 901         local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
 902                                             rtnl_locked, local->ddev->name,
 903                                             "ap");
 904         if (local->apdev == NULL)
 905                 return -ENOMEM;
 906
 907         return 0;
 908 }
 909
 910
 911 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
 912 {
 913         struct net_device *dev = local->dev;
 914
 915         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 916
 917         hostap_remove_interface(local->apdev, rtnl_locked, 1);
 918         local->apdev = NULL;
 919
 920         return 0;
 921 }
 922
 923
 924 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
 925 {
 926         struct net_device *dev = local->dev;
 927
 928         if (local->stadev)
 929                 return -EEXIST;
 930
 931         printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
 932
 933         local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
 934                                              rtnl_locked, local->ddev->name,
 935                                              "sta");
 936         if (local->stadev == NULL)
 937                 return -ENOMEM;
 938
 939         return 0;
 940 }
 941
 942
 943 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
 944 {
 945         struct net_device *dev = local->dev;
 946
 947         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 948
 949         hostap_remove_interface(local->stadev, rtnl_locked, 1);
 950         local->stadev = NULL;
 951
 952         return 0;
 953 }
 954
 955
 956 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
 957 {
 958         int ret;
 959
 960         if (val < 0 || val > 1)
 961                 return -EINVAL;
 962
 963         if (local->hostapd == val)
 964                 return 0;
 965
 966         if (val) {
 967                 ret = hostap_enable_hostapd(local, rtnl_locked);
 968                 if (ret == 0)
 969                         local->hostapd = 1;
 970         } else {
 971                 local->hostapd = 0;
 972                 ret = hostap_disable_hostapd(local, rtnl_locked);
 973                 if (ret != 0)
 974                         local->hostapd = 1;
 975         }
 976
 977         return ret;
 978 }
 979
 980
 981 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
 982 {
 983         int ret;
 984
 985         if (val < 0 || val > 1)
 986                 return -EINVAL;
 987
 988         if (local->hostapd_sta == val)
 989                 return 0;
 990
 991         if (val) {
 992                 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
 993                 if (ret == 0)
 994                         local->hostapd_sta = 1;
 995         } else {
 996                 local->hostapd_sta = 0;
 997                 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
 998                 if (ret != 0)
 999                         local->hostapd_sta = 1;
1000         }
1001
1002
1003         return ret;
1004 }
1005
1006
1007 int prism2_update_comms_qual(struct net_device *dev)
1008 {
1009         struct hostap_interface *iface;
1010         local_info_t *local;
1011         int ret = 0;
1012         struct hfa384x_comms_quality sq;
1013
1014         iface = netdev_priv(dev);
1015         local = iface->local;
1016         if (!local->sta_fw_ver)
1017                 ret = -1;
1018         else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1019                 if (local->func->get_rid(local->dev,
1020                                          HFA384X_RID_DBMCOMMSQUALITY,
1021                                          &sq, sizeof(sq), 1) >= 0) {
1022                         local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1023                         local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1024                         local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1025                         local->last_comms_qual_update = jiffies;
1026                 } else
1027                         ret = -1;
1028         } else {
1029                 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1030                                          &sq, sizeof(sq), 1) >= 0) {
1031                         local->comms_qual = le16_to_cpu(sq.comm_qual);
1032                         local->avg_signal = HFA384X_LEVEL_TO_dBm(
1033                                 le16_to_cpu(sq.signal_level));
1034                         local->avg_noise = HFA384X_LEVEL_TO_dBm(
1035                                 le16_to_cpu(sq.noise_level));
1036                         local->last_comms_qual_update = jiffies;
1037                 } else
1038                         ret = -1;
1039         }
1040
1041         return ret;
1042 }
1043
1044
1045 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1046                          u8 *body, size_t bodylen)
1047 {
1048         struct sk_buff *skb;
1049         struct hostap_ieee80211_mgmt *mgmt;
1050         struct hostap_skb_tx_data *meta;
1051         struct net_device *dev = local->dev;
1052
1053         skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1054         if (skb == NULL)
1055                 return -ENOMEM;
1056
1057         mgmt = (struct hostap_ieee80211_mgmt *)
1058                 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1059         memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1060         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1061         memcpy(mgmt->da, dst, ETH_ALEN);
1062         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1063         memcpy(mgmt->bssid, dst, ETH_ALEN);
1064         if (body)
1065                 memcpy(skb_put(skb, bodylen), body, bodylen);
1066
1067         meta = (struct hostap_skb_tx_data *) skb->cb;
1068         memset(meta, 0, sizeof(*meta));
1069         meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1070         meta->iface = netdev_priv(dev);
1071
1072         skb->dev = dev;
1073         skb_reset_mac_header(skb);
1074         skb_reset_network_header(skb);
1075         dev_queue_xmit(skb);
1076
1077         return 0;
1078 }
1079
1080
1081 int prism2_sta_deauth(local_info_t *local, u16 reason)
1082 {
1083         union iwreq_data wrqu;
1084         int ret;
1085         __le16 val = cpu_to_le16(reason);
1086
1087         if (local->iw_mode != IW_MODE_INFRA ||
1088             memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1089             memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1090                 return 0;
1091
1092         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1093                                    (u8 *) &val, 2);
1094         memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1095         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1096         return ret;
1097 }
1098
1099
1100 struct proc_dir_entry *hostap_proc;
1101
1102 static int __init hostap_init(void)
1103 {
1104         if (init_net.proc_net != NULL) {
1105                 hostap_proc = proc_mkdir("hostap", init_net.proc_net);
1106                 if (!hostap_proc)
1107                         printk(KERN_WARNING "Failed to mkdir "
1108                                "/proc/net/hostap\n");
1109         } else
1110                 hostap_proc = NULL;
1111
1112         return 0;
1113 }
1114
1115
1116 static void __exit hostap_exit(void)
1117 {
1118         if (hostap_proc != NULL) {
1119                 hostap_proc = NULL;
1120                 remove_proc_entry("hostap", init_net.proc_net);
1121         }
1122 }
1123
1124
1125 EXPORT_SYMBOL(hostap_set_word);
1126 EXPORT_SYMBOL(hostap_set_string);
1127 EXPORT_SYMBOL(hostap_get_porttype);
1128 EXPORT_SYMBOL(hostap_set_encryption);
1129 EXPORT_SYMBOL(hostap_set_antsel);
1130 EXPORT_SYMBOL(hostap_set_roaming);
1131 EXPORT_SYMBOL(hostap_set_auth_algs);
1132 EXPORT_SYMBOL(hostap_dump_rx_header);
1133 EXPORT_SYMBOL(hostap_dump_tx_header);
1134 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1135 EXPORT_SYMBOL(hostap_setup_dev);
1136 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1137 EXPORT_SYMBOL(hostap_set_hostapd);
1138 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1139 EXPORT_SYMBOL(hostap_add_interface);
1140 EXPORT_SYMBOL(hostap_remove_interface);
1141 EXPORT_SYMBOL(prism2_update_comms_qual);
1142
1143 module_init(hostap_init);
1144 module_exit(hostap_exit);