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/ieee80211.h>
  30 #include <net/lib80211.h>
  31 #include <asm/uaccess.h>
  32
  33 #include "hostap_wlan.h"
  34 #include "hostap_80211.h"
  35 #include "hostap_ap.h"
  36 #include "hostap.h"
  37
  38 MODULE_AUTHOR("Jouni Malinen");
  39 MODULE_DESCRIPTION("Host AP common routines");
  40 MODULE_LICENSE("GPL");
  41
  42 #define TX_TIMEOUT (2 * HZ)
  43
  44 #define PRISM2_MAX_FRAME_SIZE 2304
  45 #define PRISM2_MIN_MTU 256
  46 /* FIX: */
  47 #define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))
  48
  49
  50 struct net_device * hostap_add_interface(struct local_info *local,
  51                                          int type, int rtnl_locked,
  52                                          const char *prefix,
  53                                          const char *name)
  54 {
  55         struct net_device *dev, *mdev;
  56         struct hostap_interface *iface;
  57         int ret;
  58
  59         dev = alloc_etherdev(sizeof(struct hostap_interface));
  60         if (dev == NULL)
  61                 return NULL;
  62
  63         iface = netdev_priv(dev);
  64         iface->dev = dev;
  65         iface->local = local;
  66         iface->type = type;
  67         list_add(&iface->list, &local->hostap_interfaces);
  68
  69         mdev = local->dev;
  70         memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
  71         dev->base_addr = mdev->base_addr;
  72         dev->irq = mdev->irq;
  73         dev->mem_start = mdev->mem_start;
  74         dev->mem_end = mdev->mem_end;
  75
  76         hostap_setup_dev(dev, local, type);
  77         dev->destructor = free_netdev;
  78
  79         sprintf(dev->name, "%s%s", prefix, name);
  80         if (!rtnl_locked)
  81                 rtnl_lock();
  82
  83         ret = 0;
  84         if (strchr(dev->name, '%'))
  85                 ret = dev_alloc_name(dev, dev->name);
  86
  87         SET_NETDEV_DEV(dev, mdev->dev.parent);
  88         if (ret >= 0)
  89                 ret = register_netdevice(dev);
  90
  91         if (!rtnl_locked)
  92                 rtnl_unlock();
  93
  94         if (ret < 0) {
  95                 printk(KERN_WARNING "%s: failed to add new netdevice!\n",
  96                        dev->name);
  97                 free_netdev(dev);
  98                 return NULL;
  99         }
 100
 101         printk(KERN_DEBUG "%s: registered netdevice %s\n",
 102                mdev->name, dev->name);
 103
 104         return dev;
 105 }
 106
 107
 108 void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
 109                              int remove_from_list)
 110 {
 111         struct hostap_interface *iface;
 112
 113         if (!dev)
 114                 return;
 115
 116         iface = netdev_priv(dev);
 117
 118         if (remove_from_list) {
 119                 list_del(&iface->list);
 120         }
 121
 122         if (dev == iface->local->ddev)
 123                 iface->local->ddev = NULL;
 124         else if (dev == iface->local->apdev)
 125                 iface->local->apdev = NULL;
 126         else if (dev == iface->local->stadev)
 127                 iface->local->stadev = NULL;
 128
 129         if (rtnl_locked)
 130                 unregister_netdevice(dev);
 131         else
 132                 unregister_netdev(dev);
 133
 134         /* dev->destructor = free_netdev() will free the device data, including
 135          * private data, when removing the device */
 136 }
 137
 138
 139 static inline int prism2_wds_special_addr(u8 *addr)
 140 {
 141         if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
 142                 return 0;
 143
 144         return 1;
 145 }
 146
 147
 148 int prism2_wds_add(local_info_t *local, u8 *remote_addr,
 149                    int rtnl_locked)
 150 {
 151         struct net_device *dev;
 152         struct list_head *ptr;
 153         struct hostap_interface *iface, *empty, *match;
 154
 155         empty = match = NULL;
 156         read_lock_bh(&local->iface_lock);
 157         list_for_each(ptr, &local->hostap_interfaces) {
 158                 iface = list_entry(ptr, struct hostap_interface, list);
 159                 if (iface->type != HOSTAP_INTERFACE_WDS)
 160                         continue;
 161
 162                 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
 163                         empty = iface;
 164                 else if (memcmp(iface->u.wds.remote_addr, remote_addr,
 165                                 ETH_ALEN) == 0) {
 166                         match = iface;
 167                         break;
 168                 }
 169         }
 170         if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
 171                 /* take pre-allocated entry into use */
 172                 memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
 173                 read_unlock_bh(&local->iface_lock);
 174                 printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
 175                        local->dev->name, empty->dev->name);
 176                 return 0;
 177         }
 178         read_unlock_bh(&local->iface_lock);
 179
 180         if (!prism2_wds_special_addr(remote_addr)) {
 181                 if (match)
 182                         return -EEXIST;
 183                 hostap_add_sta(local->ap, remote_addr);
 184         }
 185
 186         if (local->wds_connections >= local->wds_max_connections)
 187                 return -ENOBUFS;
 188
 189         /* verify that there is room for wds# postfix in the interface name */
 190         if (strlen(local->dev->name) > IFNAMSIZ - 5) {
 191                 printk(KERN_DEBUG "'%s' too long base device name\n",
 192                        local->dev->name);
 193                 return -EINVAL;
 194         }
 195
 196         dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
 197                                    local->ddev->name, "wds%d");
 198         if (dev == NULL)
 199                 return -ENOMEM;
 200
 201         iface = netdev_priv(dev);
 202         memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
 203
 204         local->wds_connections++;
 205
 206         return 0;
 207 }
 208
 209
 210 int prism2_wds_del(local_info_t *local, u8 *remote_addr,
 211                    int rtnl_locked, int do_not_remove)
 212 {
 213         unsigned long flags;
 214         struct list_head *ptr;
 215         struct hostap_interface *iface, *selected = NULL;
 216
 217         write_lock_irqsave(&local->iface_lock, flags);
 218         list_for_each(ptr, &local->hostap_interfaces) {
 219                 iface = list_entry(ptr, struct hostap_interface, list);
 220                 if (iface->type != HOSTAP_INTERFACE_WDS)
 221                         continue;
 222
 223                 if (memcmp(iface->u.wds.remote_addr, remote_addr,
 224                            ETH_ALEN) == 0) {
 225                         selected = iface;
 226                         break;
 227                 }
 228         }
 229         if (selected && !do_not_remove)
 230                 list_del(&selected->list);
 231         write_unlock_irqrestore(&local->iface_lock, flags);
 232
 233         if (selected) {
 234                 if (do_not_remove)
 235                         memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
 236                 else {
 237                         hostap_remove_interface(selected->dev, rtnl_locked, 0);
 238                         local->wds_connections--;
 239                 }
 240         }
 241
 242         return selected ? 0 : -ENODEV;
 243 }
 244
 245
 246 u16 hostap_tx_callback_register(local_info_t *local,
 247                                 void (*func)(struct sk_buff *, int ok, void *),
 248                                 void *data)
 249 {
 250         unsigned long flags;
 251         struct hostap_tx_callback_info *entry;
 252
 253         entry = kmalloc(sizeof(*entry),
 254                                                            GFP_ATOMIC);
 255         if (entry == NULL)
 256                 return 0;
 257
 258         entry->func = func;
 259         entry->data = data;
 260
 261         spin_lock_irqsave(&local->lock, flags);
 262         entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
 263         entry->next = local->tx_callback;
 264         local->tx_callback = entry;
 265         spin_unlock_irqrestore(&local->lock, flags);
 266
 267         return entry->idx;
 268 }
 269
 270
 271 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
 272 {
 273         unsigned long flags;
 274         struct hostap_tx_callback_info *cb, *prev = NULL;
 275
 276         spin_lock_irqsave(&local->lock, flags);
 277         cb = local->tx_callback;
 278         while (cb != NULL && cb->idx != idx) {
 279                 prev = cb;
 280                 cb = cb->next;
 281         }
 282         if (cb) {
 283                 if (prev == NULL)
 284                         local->tx_callback = cb->next;
 285                 else
 286                         prev->next = cb->next;
 287                 kfree(cb);
 288         }
 289         spin_unlock_irqrestore(&local->lock, flags);
 290
 291         return cb ? 0 : -1;
 292 }
 293
 294
 295 /* val is in host byte order */
 296 int hostap_set_word(struct net_device *dev, int rid, u16 val)
 297 {
 298         struct hostap_interface *iface;
 299         __le16 tmp = cpu_to_le16(val);
 300         iface = netdev_priv(dev);
 301         return iface->local->func->set_rid(dev, rid, &tmp, 2);
 302 }
 303
 304
 305 int hostap_set_string(struct net_device *dev, int rid, const char *val)
 306 {
 307         struct hostap_interface *iface;
 308         char buf[MAX_SSID_LEN + 2];
 309         int len;
 310
 311         iface = netdev_priv(dev);
 312         len = strlen(val);
 313         if (len > MAX_SSID_LEN)
 314                 return -1;
 315         memset(buf, 0, sizeof(buf));
 316         buf[0] = len; /* little endian 16 bit word */
 317         memcpy(buf + 2, val, len);
 318
 319         return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
 320 }
 321
 322
 323 u16 hostap_get_porttype(local_info_t *local)
 324 {
 325         if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
 326                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 327         if (local->iw_mode == IW_MODE_ADHOC)
 328                 return HFA384X_PORTTYPE_IBSS;
 329         if (local->iw_mode == IW_MODE_INFRA)
 330                 return HFA384X_PORTTYPE_BSS;
 331         if (local->iw_mode == IW_MODE_REPEAT)
 332                 return HFA384X_PORTTYPE_WDS;
 333         if (local->iw_mode == IW_MODE_MONITOR)
 334                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 335         return HFA384X_PORTTYPE_HOSTAP;
 336 }
 337
 338
 339 int hostap_set_encryption(local_info_t *local)
 340 {
 341         u16 val, old_val;
 342         int i, keylen, len, idx;
 343         char keybuf[WEP_KEY_LEN + 1];
 344         enum { NONE, WEP, OTHER } encrypt_type;
 345
 346         idx = local->crypt_info.tx_keyidx;
 347         if (local->crypt_info.crypt[idx] == NULL ||
 348             local->crypt_info.crypt[idx]->ops == NULL)
 349                 encrypt_type = NONE;
 350         else if (strcmp(local->crypt_info.crypt[idx]->ops->name, "WEP") == 0)
 351                 encrypt_type = WEP;
 352         else
 353                 encrypt_type = OTHER;
 354
 355         if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
 356                                  1) < 0) {
 357                 printk(KERN_DEBUG "Could not read current WEP flags.\n");
 358                 goto fail;
 359         }
 360         le16_to_cpus(&val);
 361         old_val = val;
 362
 363         if (encrypt_type != NONE || local->privacy_invoked)
 364                 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
 365         else
 366                 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
 367
 368         if (local->open_wep || encrypt_type == NONE ||
 369             ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
 370                 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 371         else
 372                 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 373
 374         if ((encrypt_type != NONE || local->privacy_invoked) &&
 375             (encrypt_type == OTHER || local->host_encrypt))
 376                 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
 377         else
 378                 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
 379         if ((encrypt_type != NONE || local->privacy_invoked) &&
 380             (encrypt_type == OTHER || local->host_decrypt))
 381                 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
 382         else
 383                 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
 384
 385         if (val != old_val &&
 386             hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
 387                 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
 388                        val);
 389                 goto fail;
 390         }
 391
 392         if (encrypt_type != WEP)
 393                 return 0;
 394
 395         /* 104-bit support seems to require that all the keys are set to the
 396          * same keylen */
 397         keylen = 6; /* first 5 octets */
 398         len = local->crypt_info.crypt[idx]->ops->get_key(keybuf, sizeof(keybuf), NULL,
 399                                                            local->crypt_info.crypt[idx]->priv);
 400         if (idx >= 0 && idx < WEP_KEYS && len > 5)
 401                 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
 402
 403         for (i = 0; i < WEP_KEYS; i++) {
 404                 memset(keybuf, 0, sizeof(keybuf));
 405                 if (local->crypt_info.crypt[i]) {
 406                         (void) local->crypt_info.crypt[i]->ops->get_key(
 407                                 keybuf, sizeof(keybuf),
 408                                 NULL, local->crypt_info.crypt[i]->priv);
 409                 }
 410                 if (local->func->set_rid(local->dev,
 411                                          HFA384X_RID_CNFDEFAULTKEY0 + i,
 412                                          keybuf, keylen)) {
 413                         printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
 414                                i, keylen);
 415                         goto fail;
 416                 }
 417         }
 418         if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
 419                 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
 420                 goto fail;
 421         }
 422
 423         return 0;
 424
 425  fail:
 426         printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
 427         return -1;
 428 }
 429
 430
 431 int hostap_set_antsel(local_info_t *local)
 432 {
 433         u16 val;
 434         int ret = 0;
 435
 436         if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 437             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 438                              HFA386X_CR_TX_CONFIGURE,
 439                              NULL, &val) == 0) {
 440                 val &= ~(BIT(2) | BIT(1));
 441                 switch (local->antsel_tx) {
 442                 case HOSTAP_ANTSEL_DIVERSITY:
 443                         val |= BIT(1);
 444                         break;
 445                 case HOSTAP_ANTSEL_LOW:
 446                         break;
 447                 case HOSTAP_ANTSEL_HIGH:
 448                         val |= BIT(2);
 449                         break;
 450                 }
 451
 452                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 453                                      HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
 454                         printk(KERN_INFO "%s: setting TX AntSel failed\n",
 455                                local->dev->name);
 456                         ret = -1;
 457                 }
 458         }
 459
 460         if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 461             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 462                              HFA386X_CR_RX_CONFIGURE,
 463                              NULL, &val) == 0) {
 464                 val &= ~(BIT(1) | BIT(0));
 465                 switch (local->antsel_rx) {
 466                 case HOSTAP_ANTSEL_DIVERSITY:
 467                         break;
 468                 case HOSTAP_ANTSEL_LOW:
 469                         val |= BIT(0);
 470                         break;
 471                 case HOSTAP_ANTSEL_HIGH:
 472                         val |= BIT(0) | BIT(1);
 473                         break;
 474                 }
 475
 476                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 477                                      HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
 478                         printk(KERN_INFO "%s: setting RX AntSel failed\n",
 479                                local->dev->name);
 480                         ret = -1;
 481                 }
 482         }
 483
 484         return ret;
 485 }
 486
 487
 488 int hostap_set_roaming(local_info_t *local)
 489 {
 490         u16 val;
 491
 492         switch (local->host_roaming) {
 493         case 1:
 494                 val = HFA384X_ROAMING_HOST;
 495                 break;
 496         case 2:
 497                 val = HFA384X_ROAMING_DISABLED;
 498                 break;
 499         case 0:
 500         default:
 501                 val = HFA384X_ROAMING_FIRMWARE;
 502                 break;
 503         }
 504
 505         return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
 506 }
 507
 508
 509 int hostap_set_auth_algs(local_info_t *local)
 510 {
 511         int val = local->auth_algs;
 512         /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
 513          * set to include both Open and Shared Key flags. It tries to use
 514          * Shared Key authentication in that case even if WEP keys are not
 515          * configured.. STA f/w v0.7.6 is able to handle such configuration,
 516          * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
 517         if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
 518             val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
 519                 val = PRISM2_AUTH_OPEN;
 520
 521         if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
 522                 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
 523                        "failed\n", local->dev->name, local->auth_algs);
 524                 return -EINVAL;
 525         }
 526
 527         return 0;
 528 }
 529
 530
 531 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
 532 {
 533         u16 status, fc;
 534
 535         status = __le16_to_cpu(rx->status);
 536
 537         printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
 538                "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
 539                "jiffies=%ld\n",
 540                name, status, (status >> 8) & 0x07, status >> 13, status & 1,
 541                rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
 542
 543         fc = __le16_to_cpu(rx->frame_control);
 544         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 545                "data_len=%d%s%s\n",
 546                fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
 547                __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
 548                __le16_to_cpu(rx->data_len),
 549                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 550                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 551
 552         printk(KERN_DEBUG "   A1=%pM A2=%pM A3=%pM A4=%pM\n",
 553                rx->addr1, rx->addr2, rx->addr3, rx->addr4);
 554
 555         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
 556                rx->dst_addr, rx->src_addr,
 557                __be16_to_cpu(rx->len));
 558 }
 559
 560
 561 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
 562 {
 563         u16 fc;
 564
 565         printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
 566                "tx_control=0x%04x; jiffies=%ld\n",
 567                name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
 568                __le16_to_cpu(tx->tx_control), jiffies);
 569
 570         fc = __le16_to_cpu(tx->frame_control);
 571         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 572                "data_len=%d%s%s\n",
 573                fc, 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=%pM A2=%pM A3=%pM A4=%pM\n",
 580                tx->addr1, tx->addr2, tx->addr3, tx->addr4);
 581
 582         printk(KERN_DEBUG "   dst=%pM src=%pM len=%d\n",
 583                tx->dst_addr, tx->src_addr,
 584                __be16_to_cpu(tx->len));
 585 }
 586
 587
 588 static int hostap_80211_header_parse(const struct sk_buff *skb,
 589                                      unsigned char *haddr)
 590 {
 591         memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */
 592         return ETH_ALEN;
 593 }
 594
 595
 596 int hostap_80211_get_hdrlen(u16 fc)
 597 {
 598         int hdrlen = 24;
 599
 600         switch (WLAN_FC_GET_TYPE(fc)) {
 601         case IEEE80211_FTYPE_DATA:
 602                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 603                         hdrlen = 30; /* Addr4 */
 604                 break;
 605         case IEEE80211_FTYPE_CTL:
 606                 switch (WLAN_FC_GET_STYPE(fc)) {
 607                 case IEEE80211_STYPE_CTS:
 608                 case IEEE80211_STYPE_ACK:
 609                         hdrlen = 10;
 610                         break;
 611                 default:
 612                         hdrlen = 16;
 613                         break;
 614                 }
 615                 break;
 616         }
 617
 618         return hdrlen;
 619 }
 620
 621
 622 struct net_device_stats *hostap_get_stats(struct net_device *dev)
 623 {
 624         struct hostap_interface *iface;
 625         iface = netdev_priv(dev);
 626         return &iface->stats;
 627 }
 628
 629
 630 static int prism2_close(struct net_device *dev)
 631 {
 632         struct hostap_interface *iface;
 633         local_info_t *local;
 634
 635         PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
 636
 637         iface = netdev_priv(dev);
 638         local = iface->local;
 639
 640         if (dev == local->ddev) {
 641                 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
 642         }
 643 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 644         if (!local->hostapd && dev == local->dev &&
 645             (!local->func->card_present || local->func->card_present(local)) &&
 646             local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
 647                 hostap_deauth_all_stas(dev, local->ap, 1);
 648 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 649
 650         if (dev == local->dev) {
 651                 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
 652         }
 653
 654         if (netif_running(dev)) {
 655                 netif_stop_queue(dev);
 656                 netif_device_detach(dev);
 657         }
 658
 659         cancel_work_sync(&local->reset_queue);
 660         cancel_work_sync(&local->set_multicast_list_queue);
 661         cancel_work_sync(&local->set_tim_queue);
 662 #ifndef PRISM2_NO_STATION_MODES
 663         cancel_work_sync(&local->info_queue);
 664 #endif
 665         cancel_work_sync(&local->comms_qual_update);
 666
 667         module_put(local->hw_module);
 668
 669         local->num_dev_open--;
 670
 671         if (dev != local->dev && local->dev->flags & IFF_UP &&
 672             local->master_dev_auto_open && local->num_dev_open == 1) {
 673                 /* Close master radio interface automatically if it was also
 674                  * opened automatically and we are now closing the last
 675                  * remaining non-master device. */
 676                 dev_close(local->dev);
 677         }
 678
 679         return 0;
 680 }
 681
 682
 683 static int prism2_open(struct net_device *dev)
 684 {
 685         struct hostap_interface *iface;
 686         local_info_t *local;
 687
 688         PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
 689
 690         iface = netdev_priv(dev);
 691         local = iface->local;
 692
 693         if (local->no_pri) {
 694                 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
 695                        "f/w\n", dev->name);
 696                 return 1;
 697         }
 698
 699         if ((local->func->card_present && !local->func->card_present(local)) ||
 700             local->hw_downloading)
 701                 return -ENODEV;
 702
 703         if (!try_module_get(local->hw_module))
 704                 return -ENODEV;
 705         local->num_dev_open++;
 706
 707         if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
 708                 printk(KERN_WARNING "%s: could not enable MAC port\n",
 709                        dev->name);
 710                 prism2_close(dev);
 711                 return 1;
 712         }
 713         if (!local->dev_enabled)
 714                 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
 715         local->dev_enabled = 1;
 716
 717         if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
 718                 /* Master radio interface is needed for all operation, so open
 719                  * it automatically when any virtual net_device is opened. */
 720                 local->master_dev_auto_open = 1;
 721                 dev_open(local->dev);
 722         }
 723
 724         netif_device_attach(dev);
 725         netif_start_queue(dev);
 726
 727         return 0;
 728 }
 729
 730
 731 static int prism2_set_mac_address(struct net_device *dev, void *p)
 732 {
 733         struct hostap_interface *iface;
 734         local_info_t *local;
 735         struct list_head *ptr;
 736         struct sockaddr *addr = p;
 737
 738         iface = netdev_priv(dev);
 739         local = iface->local;
 740
 741         if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
 742                                  ETH_ALEN) < 0 || local->func->reset_port(dev))
 743                 return -EINVAL;
 744
 745         read_lock_bh(&local->iface_lock);
 746         list_for_each(ptr, &local->hostap_interfaces) {
 747                 iface = list_entry(ptr, struct hostap_interface, list);
 748                 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
 749         }
 750         memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
 751         read_unlock_bh(&local->iface_lock);
 752
 753         return 0;
 754 }
 755
 756
 757 /* TODO: to be further implemented as soon as Prism2 fully supports
 758  *       GroupAddresses and correct documentation is available */
 759 void hostap_set_multicast_list_queue(struct work_struct *work)
 760 {
 761         local_info_t *local =
 762                 container_of(work, local_info_t, set_multicast_list_queue);
 763         struct net_device *dev = local->dev;
 764         struct hostap_interface *iface;
 765
 766         iface = netdev_priv(dev);
 767         if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
 768                             local->is_promisc)) {
 769                 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
 770                        dev->name, local->is_promisc ? "en" : "dis");
 771         }
 772 }
 773
 774
 775 static void hostap_set_multicast_list(struct net_device *dev)
 776 {
 777 #if 0
 778         /* FIX: promiscuous mode seems to be causing a lot of problems with
 779          * some station firmware versions (FCSErr frames, invalid MACPort, etc.
 780          * corrupted incoming frames). This code is now commented out while the
 781          * problems are investigated. */
 782         struct hostap_interface *iface;
 783         local_info_t *local;
 784
 785         iface = netdev_priv(dev);
 786         local = iface->local;
 787         if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
 788                 local->is_promisc = 1;
 789         } else {
 790                 local->is_promisc = 0;
 791         }
 792
 793         schedule_work(&local->set_multicast_list_queue);
 794 #endif
 795 }
 796
 797
 798 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
 799 {
 800         if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
 801                 return -EINVAL;
 802
 803         dev->mtu = new_mtu;
 804         return 0;
 805 }
 806
 807
 808 static void prism2_tx_timeout(struct net_device *dev)
 809 {
 810         struct hostap_interface *iface;
 811         local_info_t *local;
 812         struct hfa384x_regs regs;
 813
 814         iface = netdev_priv(dev);
 815         local = iface->local;
 816
 817         printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
 818         netif_stop_queue(local->dev);
 819
 820         local->func->read_regs(dev, &regs);
 821         printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
 822                "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
 823                dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
 824                regs.swsupport0);
 825
 826         local->func->schedule_reset(local);
 827 }
 828
 829 const struct header_ops hostap_80211_ops = {
 830         .create         = eth_header,
 831         .rebuild        = eth_rebuild_header,
 832         .cache          = eth_header_cache,
 833         .cache_update   = eth_header_cache_update,
 834         .parse          = hostap_80211_header_parse,
 835 };
 836 EXPORT_SYMBOL(hostap_80211_ops);
 837
 838 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
 839                       int type)
 840 {
 841         struct hostap_interface *iface;
 842
 843         iface = netdev_priv(dev);
 844         ether_setup(dev);
 845
 846         /* kernel callbacks */
 847         dev->get_stats = hostap_get_stats;
 848         if (iface) {
 849                 /* Currently, we point to the proper spy_data only on
 850                  * the main_dev. This could be fixed. Jean II */
 851                 iface->wireless_data.spy_data = &iface->spy_data;
 852                 dev->wireless_data = &iface->wireless_data;
 853         }
 854         dev->wireless_handlers =
 855                 (struct iw_handler_def *) &hostap_iw_handler_def;
 856         dev->do_ioctl = hostap_ioctl;
 857         dev->open = prism2_open;
 858         dev->stop = prism2_close;
 859         dev->set_mac_address = prism2_set_mac_address;
 860         dev->set_multicast_list = hostap_set_multicast_list;
 861         dev->change_mtu = prism2_change_mtu;
 862         dev->tx_timeout = prism2_tx_timeout;
 863         dev->watchdog_timeo = TX_TIMEOUT;
 864
 865         if (type == HOSTAP_INTERFACE_AP) {
 866                 dev->hard_start_xmit = hostap_mgmt_start_xmit;
 867                 dev->type = ARPHRD_IEEE80211;
 868                 dev->header_ops = &hostap_80211_ops;
 869         } else {
 870                 dev->hard_start_xmit = hostap_data_start_xmit;
 871         }
 872
 873         dev->mtu = local->mtu;
 874         if (type != HOSTAP_INTERFACE_MASTER) {
 875                 /* use main radio device queue */
 876                 dev->tx_queue_len = 0;
 877         }
 878
 879         SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
 880
 881         netif_stop_queue(dev);
 882 }
 883
 884 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
 885 {
 886         struct net_device *dev = local->dev;
 887
 888         if (local->apdev)
 889                 return -EEXIST;
 890
 891         printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
 892
 893         local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
 894                                             rtnl_locked, local->ddev->name,
 895                                             "ap");
 896         if (local->apdev == NULL)
 897                 return -ENOMEM;
 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         __le16 val = cpu_to_le16(reason);
1078
1079         if (local->iw_mode != IW_MODE_INFRA ||
1080             memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1081             memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1082                 return 0;
1083
1084         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1085                                    (u8 *) &val, 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 (init_net.proc_net != NULL) {
1097                 hostap_proc = proc_mkdir("hostap", init_net.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", init_net.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_get_hdrlen);
1127 EXPORT_SYMBOL(hostap_get_stats);
1128 EXPORT_SYMBOL(hostap_setup_dev);
1129 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1130 EXPORT_SYMBOL(hostap_set_hostapd);
1131 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1132 EXPORT_SYMBOL(hostap_add_interface);
1133 EXPORT_SYMBOL(hostap_remove_interface);
1134 EXPORT_SYMBOL(prism2_update_comms_qual);
1135
1136 module_init(hostap_init);
1137 module_exit(hostap_exit);