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/iw_handler.h>
  28 #include <net/ieee80211.h>
  29 #include <net/ieee80211_crypt.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, 0);
  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         u16 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->tx_keyidx;
 346         if (local->crypt[idx] == NULL || local->crypt[idx]->ops == NULL)
 347                 encrypt_type = NONE;
 348         else if (strcmp(local->crypt[idx]->ops->name, "WEP") == 0)
 349                 encrypt_type = WEP;
 350         else
 351                 encrypt_type = OTHER;
 352
 353         if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
 354                                  1) < 0) {
 355                 printk(KERN_DEBUG "Could not read current WEP flags.\n");
 356                 goto fail;
 357         }
 358         le16_to_cpus(&val);
 359         old_val = val;
 360
 361         if (encrypt_type != NONE || local->privacy_invoked)
 362                 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
 363         else
 364                 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
 365
 366         if (local->open_wep || encrypt_type == NONE ||
 367             ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
 368                 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 369         else
 370                 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 371
 372         if ((encrypt_type != NONE || local->privacy_invoked) &&
 373             (encrypt_type == OTHER || local->host_encrypt))
 374                 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
 375         else
 376                 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
 377         if ((encrypt_type != NONE || local->privacy_invoked) &&
 378             (encrypt_type == OTHER || local->host_decrypt))
 379                 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
 380         else
 381                 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
 382
 383         if (val != old_val &&
 384             hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
 385                 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
 386                        val);
 387                 goto fail;
 388         }
 389
 390         if (encrypt_type != WEP)
 391                 return 0;
 392
 393         /* 104-bit support seems to require that all the keys are set to the
 394          * same keylen */
 395         keylen = 6; /* first 5 octets */
 396         len = local->crypt[idx]->ops->get_key(keybuf, sizeof(keybuf),
 397                                               NULL, local->crypt[idx]->priv);
 398         if (idx >= 0 && idx < WEP_KEYS && len > 5)
 399                 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
 400
 401         for (i = 0; i < WEP_KEYS; i++) {
 402                 memset(keybuf, 0, sizeof(keybuf));
 403                 if (local->crypt[i]) {
 404                         (void) local->crypt[i]->ops->get_key(
 405                                 keybuf, sizeof(keybuf),
 406                                 NULL, local->crypt[i]->priv);
 407                 }
 408                 if (local->func->set_rid(local->dev,
 409                                          HFA384X_RID_CNFDEFAULTKEY0 + i,
 410                                          keybuf, keylen)) {
 411                         printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
 412                                i, keylen);
 413                         goto fail;
 414                 }
 415         }
 416         if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
 417                 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
 418                 goto fail;
 419         }
 420
 421         return 0;
 422
 423  fail:
 424         printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
 425         return -1;
 426 }
 427
 428
 429 int hostap_set_antsel(local_info_t *local)
 430 {
 431         u16 val;
 432         int ret = 0;
 433
 434         if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 435             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 436                              HFA386X_CR_TX_CONFIGURE,
 437                              NULL, &val) == 0) {
 438                 val &= ~(BIT(2) | BIT(1));
 439                 switch (local->antsel_tx) {
 440                 case HOSTAP_ANTSEL_DIVERSITY:
 441                         val |= BIT(1);
 442                         break;
 443                 case HOSTAP_ANTSEL_LOW:
 444                         break;
 445                 case HOSTAP_ANTSEL_HIGH:
 446                         val |= BIT(2);
 447                         break;
 448                 }
 449
 450                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 451                                      HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
 452                         printk(KERN_INFO "%s: setting TX AntSel failed\n",
 453                                local->dev->name);
 454                         ret = -1;
 455                 }
 456         }
 457
 458         if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 459             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 460                              HFA386X_CR_RX_CONFIGURE,
 461                              NULL, &val) == 0) {
 462                 val &= ~(BIT(1) | BIT(0));
 463                 switch (local->antsel_rx) {
 464                 case HOSTAP_ANTSEL_DIVERSITY:
 465                         break;
 466                 case HOSTAP_ANTSEL_LOW:
 467                         val |= BIT(0);
 468                         break;
 469                 case HOSTAP_ANTSEL_HIGH:
 470                         val |= BIT(0) | BIT(1);
 471                         break;
 472                 }
 473
 474                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 475                                      HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
 476                         printk(KERN_INFO "%s: setting RX AntSel failed\n",
 477                                local->dev->name);
 478                         ret = -1;
 479                 }
 480         }
 481
 482         return ret;
 483 }
 484
 485
 486 int hostap_set_roaming(local_info_t *local)
 487 {
 488         u16 val;
 489
 490         switch (local->host_roaming) {
 491         case 1:
 492                 val = HFA384X_ROAMING_HOST;
 493                 break;
 494         case 2:
 495                 val = HFA384X_ROAMING_DISABLED;
 496                 break;
 497         case 0:
 498         default:
 499                 val = HFA384X_ROAMING_FIRMWARE;
 500                 break;
 501         }
 502
 503         return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
 504 }
 505
 506
 507 int hostap_set_auth_algs(local_info_t *local)
 508 {
 509         int val = local->auth_algs;
 510         /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
 511          * set to include both Open and Shared Key flags. It tries to use
 512          * Shared Key authentication in that case even if WEP keys are not
 513          * configured.. STA f/w v0.7.6 is able to handle such configuration,
 514          * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
 515         if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
 516             val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
 517                 val = PRISM2_AUTH_OPEN;
 518
 519         if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
 520                 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
 521                        "failed\n", local->dev->name, local->auth_algs);
 522                 return -EINVAL;
 523         }
 524
 525         return 0;
 526 }
 527
 528
 529 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
 530 {
 531         u16 status, fc;
 532
 533         status = __le16_to_cpu(rx->status);
 534
 535         printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
 536                "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
 537                "jiffies=%ld\n",
 538                name, status, (status >> 8) & 0x07, status >> 13, status & 1,
 539                rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
 540
 541         fc = __le16_to_cpu(rx->frame_control);
 542         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 543                "data_len=%d%s%s\n",
 544                fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
 545                __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
 546                __le16_to_cpu(rx->data_len),
 547                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 548                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 549
 550         printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
 551                MACSTR "\n",
 552                MAC2STR(rx->addr1), MAC2STR(rx->addr2), MAC2STR(rx->addr3),
 553                MAC2STR(rx->addr4));
 554
 555         printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
 556                MAC2STR(rx->dst_addr), MAC2STR(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, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
 574                __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
 575                __le16_to_cpu(tx->data_len),
 576                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 577                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 578
 579         printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
 580                MACSTR "\n",
 581                MAC2STR(tx->addr1), MAC2STR(tx->addr2), MAC2STR(tx->addr3),
 582                MAC2STR(tx->addr4));
 583
 584         printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
 585                MAC2STR(tx->dst_addr), MAC2STR(tx->src_addr),
 586                __be16_to_cpu(tx->len));
 587 }
 588
 589
 590 int hostap_80211_header_parse(struct sk_buff *skb, 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_prism_header_parse(struct sk_buff *skb, unsigned char *haddr)
 598 {
 599         const unsigned char *mac = skb_mac_header(skb);
 600
 601         if (*(u32 *)mac == LWNG_CAP_DID_BASE) {
 602                 memcpy(haddr, mac + sizeof(struct linux_wlan_ng_prism_hdr) + 10,
 603                        ETH_ALEN); /* addr2 */
 604         } else { /* (*(u32 *)mac == htonl(LWNG_CAPHDR_VERSION)) */
 605                 memcpy(haddr, mac + sizeof(struct linux_wlan_ng_cap_hdr) + 10,
 606                        ETH_ALEN); /* addr2 */
 607         }
 608         return ETH_ALEN;
 609 }
 610
 611
 612 int hostap_80211_get_hdrlen(u16 fc)
 613 {
 614         int hdrlen = 24;
 615
 616         switch (WLAN_FC_GET_TYPE(fc)) {
 617         case IEEE80211_FTYPE_DATA:
 618                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 619                         hdrlen = 30; /* Addr4 */
 620                 break;
 621         case IEEE80211_FTYPE_CTL:
 622                 switch (WLAN_FC_GET_STYPE(fc)) {
 623                 case IEEE80211_STYPE_CTS:
 624                 case IEEE80211_STYPE_ACK:
 625                         hdrlen = 10;
 626                         break;
 627                 default:
 628                         hdrlen = 16;
 629                         break;
 630                 }
 631                 break;
 632         }
 633
 634         return hdrlen;
 635 }
 636
 637
 638 struct net_device_stats *hostap_get_stats(struct net_device *dev)
 639 {
 640         struct hostap_interface *iface;
 641         iface = netdev_priv(dev);
 642         return &iface->stats;
 643 }
 644
 645
 646 static int prism2_close(struct net_device *dev)
 647 {
 648         struct hostap_interface *iface;
 649         local_info_t *local;
 650
 651         PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
 652
 653         iface = netdev_priv(dev);
 654         local = iface->local;
 655
 656         if (dev == local->ddev) {
 657                 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
 658         }
 659 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 660         if (!local->hostapd && dev == local->dev &&
 661             (!local->func->card_present || local->func->card_present(local)) &&
 662             local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
 663                 hostap_deauth_all_stas(dev, local->ap, 1);
 664 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 665
 666         if (dev == local->dev) {
 667                 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
 668         }
 669
 670         if (netif_running(dev)) {
 671                 netif_stop_queue(dev);
 672                 netif_device_detach(dev);
 673         }
 674
 675         flush_scheduled_work();
 676
 677         module_put(local->hw_module);
 678
 679         local->num_dev_open--;
 680
 681         if (dev != local->dev && local->dev->flags & IFF_UP &&
 682             local->master_dev_auto_open && local->num_dev_open == 1) {
 683                 /* Close master radio interface automatically if it was also
 684                  * opened automatically and we are now closing the last
 685                  * remaining non-master device. */
 686                 dev_close(local->dev);
 687         }
 688
 689         return 0;
 690 }
 691
 692
 693 static int prism2_open(struct net_device *dev)
 694 {
 695         struct hostap_interface *iface;
 696         local_info_t *local;
 697
 698         PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
 699
 700         iface = netdev_priv(dev);
 701         local = iface->local;
 702
 703         if (local->no_pri) {
 704                 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
 705                        "f/w\n", dev->name);
 706                 return 1;
 707         }
 708
 709         if ((local->func->card_present && !local->func->card_present(local)) ||
 710             local->hw_downloading)
 711                 return -ENODEV;
 712
 713         if (!try_module_get(local->hw_module))
 714                 return -ENODEV;
 715         local->num_dev_open++;
 716
 717         if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
 718                 printk(KERN_WARNING "%s: could not enable MAC port\n",
 719                        dev->name);
 720                 prism2_close(dev);
 721                 return 1;
 722         }
 723         if (!local->dev_enabled)
 724                 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
 725         local->dev_enabled = 1;
 726
 727         if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
 728                 /* Master radio interface is needed for all operation, so open
 729                  * it automatically when any virtual net_device is opened. */
 730                 local->master_dev_auto_open = 1;
 731                 dev_open(local->dev);
 732         }
 733
 734         netif_device_attach(dev);
 735         netif_start_queue(dev);
 736
 737         return 0;
 738 }
 739
 740
 741 static int prism2_set_mac_address(struct net_device *dev, void *p)
 742 {
 743         struct hostap_interface *iface;
 744         local_info_t *local;
 745         struct list_head *ptr;
 746         struct sockaddr *addr = p;
 747
 748         iface = netdev_priv(dev);
 749         local = iface->local;
 750
 751         if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
 752                                  ETH_ALEN) < 0 || local->func->reset_port(dev))
 753                 return -EINVAL;
 754
 755         read_lock_bh(&local->iface_lock);
 756         list_for_each(ptr, &local->hostap_interfaces) {
 757                 iface = list_entry(ptr, struct hostap_interface, list);
 758                 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
 759         }
 760         memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
 761         read_unlock_bh(&local->iface_lock);
 762
 763         return 0;
 764 }
 765
 766
 767 /* TODO: to be further implemented as soon as Prism2 fully supports
 768  *       GroupAddresses and correct documentation is available */
 769 void hostap_set_multicast_list_queue(struct work_struct *work)
 770 {
 771         local_info_t *local =
 772                 container_of(work, local_info_t, set_multicast_list_queue);
 773         struct net_device *dev = local->dev;
 774         struct hostap_interface *iface;
 775
 776         iface = netdev_priv(dev);
 777         if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
 778                             local->is_promisc)) {
 779                 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
 780                        dev->name, local->is_promisc ? "en" : "dis");
 781         }
 782 }
 783
 784
 785 static void hostap_set_multicast_list(struct net_device *dev)
 786 {
 787 #if 0
 788         /* FIX: promiscuous mode seems to be causing a lot of problems with
 789          * some station firmware versions (FCSErr frames, invalid MACPort, etc.
 790          * corrupted incoming frames). This code is now commented out while the
 791          * problems are investigated. */
 792         struct hostap_interface *iface;
 793         local_info_t *local;
 794
 795         iface = netdev_priv(dev);
 796         local = iface->local;
 797         if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
 798                 local->is_promisc = 1;
 799         } else {
 800                 local->is_promisc = 0;
 801         }
 802
 803         schedule_work(&local->set_multicast_list_queue);
 804 #endif
 805 }
 806
 807
 808 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
 809 {
 810         if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
 811                 return -EINVAL;
 812
 813         dev->mtu = new_mtu;
 814         return 0;
 815 }
 816
 817
 818 static void prism2_tx_timeout(struct net_device *dev)
 819 {
 820         struct hostap_interface *iface;
 821         local_info_t *local;
 822         struct hfa384x_regs regs;
 823
 824         iface = netdev_priv(dev);
 825         local = iface->local;
 826
 827         printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
 828         netif_stop_queue(local->dev);
 829
 830         local->func->read_regs(dev, &regs);
 831         printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
 832                "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
 833                dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
 834                regs.swsupport0);
 835
 836         local->func->schedule_reset(local);
 837 }
 838
 839
 840 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
 841                       int main_dev)
 842 {
 843         struct hostap_interface *iface;
 844
 845         iface = netdev_priv(dev);
 846         ether_setup(dev);
 847
 848         /* kernel callbacks */
 849         dev->get_stats = hostap_get_stats;
 850         if (iface) {
 851                 /* Currently, we point to the proper spy_data only on
 852                  * the main_dev. This could be fixed. Jean II */
 853                 iface->wireless_data.spy_data = &iface->spy_data;
 854                 dev->wireless_data = &iface->wireless_data;
 855         }
 856         dev->wireless_handlers =
 857                 (struct iw_handler_def *) &hostap_iw_handler_def;
 858         dev->do_ioctl = hostap_ioctl;
 859         dev->open = prism2_open;
 860         dev->stop = prism2_close;
 861         dev->hard_start_xmit = hostap_data_start_xmit;
 862         dev->set_mac_address = prism2_set_mac_address;
 863         dev->set_multicast_list = hostap_set_multicast_list;
 864         dev->change_mtu = prism2_change_mtu;
 865         dev->tx_timeout = prism2_tx_timeout;
 866         dev->watchdog_timeo = TX_TIMEOUT;
 867
 868         dev->mtu = local->mtu;
 869         if (!main_dev) {
 870                 /* use main radio device queue */
 871                 dev->tx_queue_len = 0;
 872         }
 873
 874         SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
 875
 876         netif_stop_queue(dev);
 877 }
 878
 879
 880 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
 881 {
 882         struct net_device *dev = local->dev;
 883
 884         if (local->apdev)
 885                 return -EEXIST;
 886
 887         printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
 888
 889         local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
 890                                             rtnl_locked, local->ddev->name,
 891                                             "ap");
 892         if (local->apdev == NULL)
 893                 return -ENOMEM;
 894
 895         local->apdev->hard_start_xmit = hostap_mgmt_start_xmit;
 896         local->apdev->type = ARPHRD_IEEE80211;
 897         local->apdev->hard_header_parse = hostap_80211_header_parse;
 898
 899         return 0;
 900 }
 901
 902
 903 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
 904 {
 905         struct net_device *dev = local->dev;
 906
 907         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 908
 909         hostap_remove_interface(local->apdev, rtnl_locked, 1);
 910         local->apdev = NULL;
 911
 912         return 0;
 913 }
 914
 915
 916 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
 917 {
 918         struct net_device *dev = local->dev;
 919
 920         if (local->stadev)
 921                 return -EEXIST;
 922
 923         printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
 924
 925         local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
 926                                              rtnl_locked, local->ddev->name,
 927                                              "sta");
 928         if (local->stadev == NULL)
 929                 return -ENOMEM;
 930
 931         return 0;
 932 }
 933
 934
 935 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
 936 {
 937         struct net_device *dev = local->dev;
 938
 939         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 940
 941         hostap_remove_interface(local->stadev, rtnl_locked, 1);
 942         local->stadev = NULL;
 943
 944         return 0;
 945 }
 946
 947
 948 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
 949 {
 950         int ret;
 951
 952         if (val < 0 || val > 1)
 953                 return -EINVAL;
 954
 955         if (local->hostapd == val)
 956                 return 0;
 957
 958         if (val) {
 959                 ret = hostap_enable_hostapd(local, rtnl_locked);
 960                 if (ret == 0)
 961                         local->hostapd = 1;
 962         } else {
 963                 local->hostapd = 0;
 964                 ret = hostap_disable_hostapd(local, rtnl_locked);
 965                 if (ret != 0)
 966                         local->hostapd = 1;
 967         }
 968
 969         return ret;
 970 }
 971
 972
 973 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
 974 {
 975         int ret;
 976
 977         if (val < 0 || val > 1)
 978                 return -EINVAL;
 979
 980         if (local->hostapd_sta == val)
 981                 return 0;
 982
 983         if (val) {
 984                 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
 985                 if (ret == 0)
 986                         local->hostapd_sta = 1;
 987         } else {
 988                 local->hostapd_sta = 0;
 989                 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
 990                 if (ret != 0)
 991                         local->hostapd_sta = 1;
 992         }
 993
 994
 995         return ret;
 996 }
 997
 998
 999 int prism2_update_comms_qual(struct net_device *dev)
1000 {
1001         struct hostap_interface *iface;
1002         local_info_t *local;
1003         int ret = 0;
1004         struct hfa384x_comms_quality sq;
1005
1006         iface = netdev_priv(dev);
1007         local = iface->local;
1008         if (!local->sta_fw_ver)
1009                 ret = -1;
1010         else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1011                 if (local->func->get_rid(local->dev,
1012                                          HFA384X_RID_DBMCOMMSQUALITY,
1013                                          &sq, sizeof(sq), 1) >= 0) {
1014                         local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1015                         local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1016                         local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1017                         local->last_comms_qual_update = jiffies;
1018                 } else
1019                         ret = -1;
1020         } else {
1021                 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1022                                          &sq, sizeof(sq), 1) >= 0) {
1023                         local->comms_qual = le16_to_cpu(sq.comm_qual);
1024                         local->avg_signal = HFA384X_LEVEL_TO_dBm(
1025                                 le16_to_cpu(sq.signal_level));
1026                         local->avg_noise = HFA384X_LEVEL_TO_dBm(
1027                                 le16_to_cpu(sq.noise_level));
1028                         local->last_comms_qual_update = jiffies;
1029                 } else
1030                         ret = -1;
1031         }
1032
1033         return ret;
1034 }
1035
1036
1037 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1038                          u8 *body, size_t bodylen)
1039 {
1040         struct sk_buff *skb;
1041         struct hostap_ieee80211_mgmt *mgmt;
1042         struct hostap_skb_tx_data *meta;
1043         struct net_device *dev = local->dev;
1044
1045         skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1046         if (skb == NULL)
1047                 return -ENOMEM;
1048
1049         mgmt = (struct hostap_ieee80211_mgmt *)
1050                 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1051         memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1052         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1053         memcpy(mgmt->da, dst, ETH_ALEN);
1054         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1055         memcpy(mgmt->bssid, dst, ETH_ALEN);
1056         if (body)
1057                 memcpy(skb_put(skb, bodylen), body, bodylen);
1058
1059         meta = (struct hostap_skb_tx_data *) skb->cb;
1060         memset(meta, 0, sizeof(*meta));
1061         meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1062         meta->iface = netdev_priv(dev);
1063
1064         skb->dev = dev;
1065         skb_reset_mac_header(skb);
1066         skb_reset_network_header(skb);
1067         dev_queue_xmit(skb);
1068
1069         return 0;
1070 }
1071
1072
1073 int prism2_sta_deauth(local_info_t *local, u16 reason)
1074 {
1075         union iwreq_data wrqu;
1076         int ret;
1077
1078         if (local->iw_mode != IW_MODE_INFRA ||
1079             memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1080             memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1081                 return 0;
1082
1083         reason = cpu_to_le16(reason);
1084         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1085                                    (u8 *) &reason, 2);
1086         memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1087         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1088         return ret;
1089 }
1090
1091
1092 struct proc_dir_entry *hostap_proc;
1093
1094 static int __init hostap_init(void)
1095 {
1096         if (proc_net != NULL) {
1097                 hostap_proc = proc_mkdir("hostap", proc_net);
1098                 if (!hostap_proc)
1099                         printk(KERN_WARNING "Failed to mkdir "
1100                                "/proc/net/hostap\n");
1101         } else
1102                 hostap_proc = NULL;
1103
1104         return 0;
1105 }
1106
1107
1108 static void __exit hostap_exit(void)
1109 {
1110         if (hostap_proc != NULL) {
1111                 hostap_proc = NULL;
1112                 remove_proc_entry("hostap", proc_net);
1113         }
1114 }
1115
1116
1117 EXPORT_SYMBOL(hostap_set_word);
1118 EXPORT_SYMBOL(hostap_set_string);
1119 EXPORT_SYMBOL(hostap_get_porttype);
1120 EXPORT_SYMBOL(hostap_set_encryption);
1121 EXPORT_SYMBOL(hostap_set_antsel);
1122 EXPORT_SYMBOL(hostap_set_roaming);
1123 EXPORT_SYMBOL(hostap_set_auth_algs);
1124 EXPORT_SYMBOL(hostap_dump_rx_header);
1125 EXPORT_SYMBOL(hostap_dump_tx_header);
1126 EXPORT_SYMBOL(hostap_80211_header_parse);
1127 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1128 EXPORT_SYMBOL(hostap_get_stats);
1129 EXPORT_SYMBOL(hostap_setup_dev);
1130 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1131 EXPORT_SYMBOL(hostap_set_hostapd);
1132 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1133 EXPORT_SYMBOL(hostap_add_interface);
1134 EXPORT_SYMBOL(hostap_remove_interface);
1135 EXPORT_SYMBOL(prism2_update_comms_qual);
1136
1137 module_init(hostap_init);
1138 module_exit(hostap_exit);