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  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.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/config.h>
  16 #include <linux/module.h>
  17 #include <linux/init.h>
  18 #include <linux/slab.h>
  19 #include <linux/proc_fs.h>
  20 #include <linux/if_arp.h>
  21 #include <linux/delay.h>
  22 #include <linux/random.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/kmod.h>
  25 #include <linux/rtnetlink.h>
  26 #include <linux/wireless.h>
  27 #include <linux/etherdevice.h>
  28 #include <net/iw_handler.h>
  29 #include <net/ieee80211.h>
  30 #include <net/ieee80211_crypt.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 MODULE_VERSION(PRISM2_VERSION);
  42
  43 #define TX_TIMEOUT (2 * HZ)
  44
  45 #define PRISM2_MAX_FRAME_SIZE 2304
  46 #define PRISM2_MIN_MTU 256
  47 /* FIX: */
  48 #define PRISM2_MAX_MTU (PRISM2_MAX_FRAME_SIZE - (6 /* LLC */ + 8 /* WEP */))
  49
  50
  51 struct net_device * hostap_add_interface(struct local_info *local,
  52                                          int type, int rtnl_locked,
  53                                          const char *prefix,
  54                                          const char *name)
  55 {
  56         struct net_device *dev, *mdev;
  57         struct hostap_interface *iface;
  58         int ret;
  59
  60         dev = alloc_etherdev(sizeof(struct hostap_interface));
  61         if (dev == NULL)
  62                 return NULL;
  63
  64         iface = netdev_priv(dev);
  65         iface->dev = dev;
  66         iface->local = local;
  67         iface->type = type;
  68         list_add(&iface->list, &local->hostap_interfaces);
  69
  70         mdev = local->dev;
  71         memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
  72         dev->base_addr = mdev->base_addr;
  73         dev->irq = mdev->irq;
  74         dev->mem_start = mdev->mem_start;
  75         dev->mem_end = mdev->mem_end;
  76
  77         hostap_setup_dev(dev, local, 0);
  78         dev->destructor = free_netdev;
  79
  80         sprintf(dev->name, "%s%s", prefix, name);
  81         if (!rtnl_locked)
  82                 rtnl_lock();
  83
  84         ret = 0;
  85         if (strchr(dev->name, '%'))
  86                 ret = dev_alloc_name(dev, dev->name);
  87
  88         SET_NETDEV_DEV(dev, mdev->class_dev.dev);
  89         if (ret >= 0)
  90                 ret = register_netdevice(dev);
  91
  92         if (!rtnl_locked)
  93                 rtnl_unlock();
  94
  95         if (ret < 0) {
  96                 printk(KERN_WARNING "%s: failed to add new netdevice!\n",
  97                        dev->name);
  98                 free_netdev(dev);
  99                 return NULL;
 100         }
 101
 102         printk(KERN_DEBUG "%s: registered netdevice %s\n",
 103                mdev->name, dev->name);
 104
 105         return dev;
 106 }
 107
 108
 109 void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
 110                              int remove_from_list)
 111 {
 112         struct hostap_interface *iface;
 113
 114         if (!dev)
 115                 return;
 116
 117         iface = netdev_priv(dev);
 118
 119         if (remove_from_list) {
 120                 list_del(&iface->list);
 121         }
 122
 123         if (dev == iface->local->ddev)
 124                 iface->local->ddev = NULL;
 125         else if (dev == iface->local->apdev)
 126                 iface->local->apdev = NULL;
 127         else if (dev == iface->local->stadev)
 128                 iface->local->stadev = NULL;
 129
 130         if (rtnl_locked)
 131                 unregister_netdevice(dev);
 132         else
 133                 unregister_netdev(dev);
 134
 135         /* dev->destructor = free_netdev() will free the device data, including
 136          * private data, when removing the device */
 137 }
 138
 139
 140 static inline int prism2_wds_special_addr(u8 *addr)
 141 {
 142         if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
 143                 return 0;
 144
 145         return 1;
 146 }
 147
 148
 149 int prism2_wds_add(local_info_t *local, u8 *remote_addr,
 150                    int rtnl_locked)
 151 {
 152         struct net_device *dev;
 153         struct list_head *ptr;
 154         struct hostap_interface *iface, *empty, *match;
 155
 156         empty = match = NULL;
 157         read_lock_bh(&local->iface_lock);
 158         list_for_each(ptr, &local->hostap_interfaces) {
 159                 iface = list_entry(ptr, struct hostap_interface, list);
 160                 if (iface->type != HOSTAP_INTERFACE_WDS)
 161                         continue;
 162
 163                 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
 164                         empty = iface;
 165                 else if (memcmp(iface->u.wds.remote_addr, remote_addr,
 166                                 ETH_ALEN) == 0) {
 167                         match = iface;
 168                         break;
 169                 }
 170         }
 171         if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
 172                 /* take pre-allocated entry into use */
 173                 memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
 174                 read_unlock_bh(&local->iface_lock);
 175                 printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
 176                        local->dev->name, empty->dev->name);
 177                 return 0;
 178         }
 179         read_unlock_bh(&local->iface_lock);
 180
 181         if (!prism2_wds_special_addr(remote_addr)) {
 182                 if (match)
 183                         return -EEXIST;
 184                 hostap_add_sta(local->ap, remote_addr);
 185         }
 186
 187         if (local->wds_connections >= local->wds_max_connections)
 188                 return -ENOBUFS;
 189
 190         /* verify that there is room for wds# postfix in the interface name */
 191         if (strlen(local->dev->name) > IFNAMSIZ - 5) {
 192                 printk(KERN_DEBUG "'%s' too long base device name\n",
 193                        local->dev->name);
 194                 return -EINVAL;
 195         }
 196
 197         dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
 198                                    local->ddev->name, "wds%d");
 199         if (dev == NULL)
 200                 return -ENOMEM;
 201
 202         iface = netdev_priv(dev);
 203         memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
 204
 205         local->wds_connections++;
 206
 207         return 0;
 208 }
 209
 210
 211 int prism2_wds_del(local_info_t *local, u8 *remote_addr,
 212                    int rtnl_locked, int do_not_remove)
 213 {
 214         unsigned long flags;
 215         struct list_head *ptr;
 216         struct hostap_interface *iface, *selected = NULL;
 217
 218         write_lock_irqsave(&local->iface_lock, flags);
 219         list_for_each(ptr, &local->hostap_interfaces) {
 220                 iface = list_entry(ptr, struct hostap_interface, list);
 221                 if (iface->type != HOSTAP_INTERFACE_WDS)
 222                         continue;
 223
 224                 if (memcmp(iface->u.wds.remote_addr, remote_addr,
 225                            ETH_ALEN) == 0) {
 226                         selected = iface;
 227                         break;
 228                 }
 229         }
 230         if (selected && !do_not_remove)
 231                 list_del(&selected->list);
 232         write_unlock_irqrestore(&local->iface_lock, flags);
 233
 234         if (selected) {
 235                 if (do_not_remove)
 236                         memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
 237                 else {
 238                         hostap_remove_interface(selected->dev, rtnl_locked, 0);
 239                         local->wds_connections--;
 240                 }
 241         }
 242
 243         return selected ? 0 : -ENODEV;
 244 }
 245
 246
 247 u16 hostap_tx_callback_register(local_info_t *local,
 248                                 void (*func)(struct sk_buff *, int ok, void *),
 249                                 void *data)
 250 {
 251         unsigned long flags;
 252         struct hostap_tx_callback_info *entry;
 253
 254         entry = (struct hostap_tx_callback_info *) kmalloc(sizeof(*entry),
 255                                                            GFP_ATOMIC);
 256         if (entry == NULL)
 257                 return 0;
 258
 259         entry->func = func;
 260         entry->data = data;
 261
 262         spin_lock_irqsave(&local->lock, flags);
 263         entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
 264         entry->next = local->tx_callback;
 265         local->tx_callback = entry;
 266         spin_unlock_irqrestore(&local->lock, flags);
 267
 268         return entry->idx;
 269 }
 270
 271
 272 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
 273 {
 274         unsigned long flags;
 275         struct hostap_tx_callback_info *cb, *prev = NULL;
 276
 277         spin_lock_irqsave(&local->lock, flags);
 278         cb = local->tx_callback;
 279         while (cb != NULL && cb->idx != idx) {
 280                 prev = cb;
 281                 cb = cb->next;
 282         }
 283         if (cb) {
 284                 if (prev == NULL)
 285                         local->tx_callback = cb->next;
 286                 else
 287                         prev->next = cb->next;
 288                 kfree(cb);
 289         }
 290         spin_unlock_irqrestore(&local->lock, flags);
 291
 292         return cb ? 0 : -1;
 293 }
 294
 295
 296 /* val is in host byte order */
 297 int hostap_set_word(struct net_device *dev, int rid, u16 val)
 298 {
 299         struct hostap_interface *iface;
 300         u16 tmp = cpu_to_le16(val);
 301         iface = netdev_priv(dev);
 302         return iface->local->func->set_rid(dev, rid, &tmp, 2);
 303 }
 304
 305
 306 int hostap_set_string(struct net_device *dev, int rid, const char *val)
 307 {
 308         struct hostap_interface *iface;
 309         char buf[MAX_SSID_LEN + 2];
 310         int len;
 311
 312         iface = netdev_priv(dev);
 313         len = strlen(val);
 314         if (len > MAX_SSID_LEN)
 315                 return -1;
 316         memset(buf, 0, sizeof(buf));
 317         buf[0] = len; /* little endian 16 bit word */
 318         memcpy(buf + 2, val, len);
 319
 320         return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
 321 }
 322
 323
 324 u16 hostap_get_porttype(local_info_t *local)
 325 {
 326         if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
 327                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 328         if (local->iw_mode == IW_MODE_ADHOC)
 329                 return HFA384X_PORTTYPE_IBSS;
 330         if (local->iw_mode == IW_MODE_INFRA)
 331                 return HFA384X_PORTTYPE_BSS;
 332         if (local->iw_mode == IW_MODE_REPEAT)
 333                 return HFA384X_PORTTYPE_WDS;
 334         if (local->iw_mode == IW_MODE_MONITOR)
 335                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 336         return HFA384X_PORTTYPE_HOSTAP;
 337 }
 338
 339
 340 int hostap_set_encryption(local_info_t *local)
 341 {
 342         u16 val, old_val;
 343         int i, keylen, len, idx;
 344         char keybuf[WEP_KEY_LEN + 1];
 345         enum { NONE, WEP, OTHER } encrypt_type;
 346
 347         idx = local->tx_keyidx;
 348         if (local->crypt[idx] == NULL || local->crypt[idx]->ops == NULL)
 349                 encrypt_type = NONE;
 350         else if (strcmp(local->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[idx]->ops->get_key(keybuf, sizeof(keybuf),
 399                                               NULL, local->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[i]) {
 406                         (void) local->crypt[i]->ops->get_key(
 407                                 keybuf, sizeof(keybuf),
 408                                 NULL, local->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=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
 553                MACSTR "\n",
 554                MAC2STR(rx->addr1), MAC2STR(rx->addr2), MAC2STR(rx->addr3),
 555                MAC2STR(rx->addr4));
 556
 557         printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
 558                MAC2STR(rx->dst_addr), MAC2STR(rx->src_addr),
 559                __be16_to_cpu(rx->len));
 560 }
 561
 562
 563 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
 564 {
 565         u16 fc;
 566
 567         printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
 568                "tx_control=0x%04x; jiffies=%ld\n",
 569                name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
 570                __le16_to_cpu(tx->tx_control), jiffies);
 571
 572         fc = __le16_to_cpu(tx->frame_control);
 573         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 574                "data_len=%d%s%s\n",
 575                fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
 576                __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
 577                __le16_to_cpu(tx->data_len),
 578                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 579                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 580
 581         printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
 582                MACSTR "\n",
 583                MAC2STR(tx->addr1), MAC2STR(tx->addr2), MAC2STR(tx->addr3),
 584                MAC2STR(tx->addr4));
 585
 586         printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
 587                MAC2STR(tx->dst_addr), MAC2STR(tx->src_addr),
 588                __be16_to_cpu(tx->len));
 589 }
 590
 591
 592 int hostap_80211_header_parse(struct sk_buff *skb, unsigned char *haddr)
 593 {
 594         memcpy(haddr, skb->mac.raw + 10, ETH_ALEN); /* addr2 */
 595         return ETH_ALEN;
 596 }
 597
 598
 599 int hostap_80211_prism_header_parse(struct sk_buff *skb, unsigned char *haddr)
 600 {
 601         if (*(u32 *)skb->mac.raw == LWNG_CAP_DID_BASE) {
 602                 memcpy(haddr, skb->mac.raw +
 603                        sizeof(struct linux_wlan_ng_prism_hdr) + 10,
 604                        ETH_ALEN); /* addr2 */
 605         } else { /* (*(u32 *)skb->mac.raw == htonl(LWNG_CAPHDR_VERSION)) */
 606                 memcpy(haddr, skb->mac.raw +
 607                        sizeof(struct linux_wlan_ng_cap_hdr) + 10,
 608                        ETH_ALEN); /* addr2 */
 609         }
 610         return ETH_ALEN;
 611 }
 612
 613
 614 int hostap_80211_get_hdrlen(u16 fc)
 615 {
 616         int hdrlen = 24;
 617
 618         switch (WLAN_FC_GET_TYPE(fc)) {
 619         case IEEE80211_FTYPE_DATA:
 620                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 621                         hdrlen = 30; /* Addr4 */
 622                 break;
 623         case IEEE80211_FTYPE_CTL:
 624                 switch (WLAN_FC_GET_STYPE(fc)) {
 625                 case IEEE80211_STYPE_CTS:
 626                 case IEEE80211_STYPE_ACK:
 627                         hdrlen = 10;
 628                         break;
 629                 default:
 630                         hdrlen = 16;
 631                         break;
 632                 }
 633                 break;
 634         }
 635
 636         return hdrlen;
 637 }
 638
 639
 640 struct net_device_stats *hostap_get_stats(struct net_device *dev)
 641 {
 642         struct hostap_interface *iface;
 643         iface = netdev_priv(dev);
 644         return &iface->stats;
 645 }
 646
 647
 648 static int prism2_close(struct net_device *dev)
 649 {
 650         struct hostap_interface *iface;
 651         local_info_t *local;
 652
 653         PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
 654
 655         iface = netdev_priv(dev);
 656         local = iface->local;
 657
 658         if (dev == local->ddev) {
 659                 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
 660         }
 661 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 662         if (!local->hostapd && dev == local->dev &&
 663             (!local->func->card_present || local->func->card_present(local)) &&
 664             local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
 665                 hostap_deauth_all_stas(dev, local->ap, 1);
 666 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 667
 668         if (dev == local->dev) {
 669                 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
 670         }
 671
 672         if (netif_running(dev)) {
 673                 netif_stop_queue(dev);
 674                 netif_device_detach(dev);
 675         }
 676
 677         flush_scheduled_work();
 678
 679         module_put(local->hw_module);
 680
 681         local->num_dev_open--;
 682
 683         if (dev != local->dev && local->dev->flags & IFF_UP &&
 684             local->master_dev_auto_open && local->num_dev_open == 1) {
 685                 /* Close master radio interface automatically if it was also
 686                  * opened automatically and we are now closing the last
 687                  * remaining non-master device. */
 688                 dev_close(local->dev);
 689         }
 690
 691         return 0;
 692 }
 693
 694
 695 static int prism2_open(struct net_device *dev)
 696 {
 697         struct hostap_interface *iface;
 698         local_info_t *local;
 699
 700         PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
 701
 702         iface = netdev_priv(dev);
 703         local = iface->local;
 704
 705         if (local->no_pri) {
 706                 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
 707                        "f/w\n", dev->name);
 708                 return 1;
 709         }
 710
 711         if ((local->func->card_present && !local->func->card_present(local)) ||
 712             local->hw_downloading)
 713                 return -ENODEV;
 714
 715         if (!try_module_get(local->hw_module))
 716                 return -ENODEV;
 717         local->num_dev_open++;
 718
 719         if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
 720                 printk(KERN_WARNING "%s: could not enable MAC port\n",
 721                        dev->name);
 722                 prism2_close(dev);
 723                 return 1;
 724         }
 725         if (!local->dev_enabled)
 726                 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
 727         local->dev_enabled = 1;
 728
 729         if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
 730                 /* Master radio interface is needed for all operation, so open
 731                  * it automatically when any virtual net_device is opened. */
 732                 local->master_dev_auto_open = 1;
 733                 dev_open(local->dev);
 734         }
 735
 736         netif_device_attach(dev);
 737         netif_start_queue(dev);
 738
 739         return 0;
 740 }
 741
 742
 743 static int prism2_set_mac_address(struct net_device *dev, void *p)
 744 {
 745         struct hostap_interface *iface;
 746         local_info_t *local;
 747         struct list_head *ptr;
 748         struct sockaddr *addr = p;
 749
 750         iface = netdev_priv(dev);
 751         local = iface->local;
 752
 753         if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
 754                                  ETH_ALEN) < 0 || local->func->reset_port(dev))
 755                 return -EINVAL;
 756
 757         read_lock_bh(&local->iface_lock);
 758         list_for_each(ptr, &local->hostap_interfaces) {
 759                 iface = list_entry(ptr, struct hostap_interface, list);
 760                 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
 761         }
 762         memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
 763         read_unlock_bh(&local->iface_lock);
 764
 765         return 0;
 766 }
 767
 768
 769 /* TODO: to be further implemented as soon as Prism2 fully supports
 770  *       GroupAddresses and correct documentation is available */
 771 void hostap_set_multicast_list_queue(void *data)
 772 {
 773         struct net_device *dev = (struct net_device *) data;
 774         struct hostap_interface *iface;
 775         local_info_t *local;
 776
 777         iface = netdev_priv(dev);
 778         local = iface->local;
 779         if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
 780                             local->is_promisc)) {
 781                 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
 782                        dev->name, local->is_promisc ? "en" : "dis");
 783         }
 784 }
 785
 786
 787 static void hostap_set_multicast_list(struct net_device *dev)
 788 {
 789 #if 0
 790         /* FIX: promiscuous mode seems to be causing a lot of problems with
 791          * some station firmware versions (FCSErr frames, invalid MACPort, etc.
 792          * corrupted incoming frames). This code is now commented out while the
 793          * problems are investigated. */
 794         struct hostap_interface *iface;
 795         local_info_t *local;
 796
 797         iface = netdev_priv(dev);
 798         local = iface->local;
 799         if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
 800                 local->is_promisc = 1;
 801         } else {
 802                 local->is_promisc = 0;
 803         }
 804
 805         schedule_work(&local->set_multicast_list_queue);
 806 #endif
 807 }
 808
 809
 810 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
 811 {
 812         if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
 813                 return -EINVAL;
 814
 815         dev->mtu = new_mtu;
 816         return 0;
 817 }
 818
 819
 820 static void prism2_tx_timeout(struct net_device *dev)
 821 {
 822         struct hostap_interface *iface;
 823         local_info_t *local;
 824         struct hfa384x_regs regs;
 825
 826         iface = netdev_priv(dev);
 827         local = iface->local;
 828
 829         printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
 830         netif_stop_queue(local->dev);
 831
 832         local->func->read_regs(dev, &regs);
 833         printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
 834                "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
 835                dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
 836                regs.swsupport0);
 837
 838         local->func->schedule_reset(local);
 839 }
 840
 841
 842 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
 843                       int main_dev)
 844 {
 845         struct hostap_interface *iface;
 846
 847         iface = netdev_priv(dev);
 848         ether_setup(dev);
 849
 850         /* kernel callbacks */
 851         dev->get_stats = hostap_get_stats;
 852         if (iface) {
 853                 /* Currently, we point to the proper spy_data only on
 854                  * the main_dev. This could be fixed. Jean II */
 855                 iface->wireless_data.spy_data = &iface->spy_data;
 856                 dev->wireless_data = &iface->wireless_data;
 857         }
 858         dev->wireless_handlers =
 859                 (struct iw_handler_def *) &hostap_iw_handler_def;
 860         dev->do_ioctl = hostap_ioctl;
 861         dev->open = prism2_open;
 862         dev->stop = prism2_close;
 863         dev->hard_start_xmit = hostap_data_start_xmit;
 864         dev->set_mac_address = prism2_set_mac_address;
 865         dev->set_multicast_list = hostap_set_multicast_list;
 866         dev->change_mtu = prism2_change_mtu;
 867         dev->tx_timeout = prism2_tx_timeout;
 868         dev->watchdog_timeo = TX_TIMEOUT;
 869
 870         dev->mtu = local->mtu;
 871         if (!main_dev) {
 872                 /* use main radio device queue */
 873                 dev->tx_queue_len = 0;
 874         }
 875
 876         SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
 877
 878         netif_stop_queue(dev);
 879 }
 880
 881
 882 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
 883 {
 884         struct net_device *dev = local->dev;
 885
 886         if (local->apdev)
 887                 return -EEXIST;
 888
 889         printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
 890
 891         local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
 892                                             rtnl_locked, local->ddev->name,
 893                                             "ap");
 894         if (local->apdev == NULL)
 895                 return -ENOMEM;
 896
 897         local->apdev->hard_start_xmit = hostap_mgmt_start_xmit;
 898         local->apdev->type = ARPHRD_IEEE80211;
 899         local->apdev->hard_header_parse = hostap_80211_header_parse;
 900
 901         return 0;
 902 }
 903
 904
 905 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
 906 {
 907         struct net_device *dev = local->dev;
 908
 909         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 910
 911         hostap_remove_interface(local->apdev, rtnl_locked, 1);
 912         local->apdev = NULL;
 913
 914         return 0;
 915 }
 916
 917
 918 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
 919 {
 920         struct net_device *dev = local->dev;
 921
 922         if (local->stadev)
 923                 return -EEXIST;
 924
 925         printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
 926
 927         local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
 928                                              rtnl_locked, local->ddev->name,
 929                                              "sta");
 930         if (local->stadev == NULL)
 931                 return -ENOMEM;
 932
 933         return 0;
 934 }
 935
 936
 937 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
 938 {
 939         struct net_device *dev = local->dev;
 940
 941         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 942
 943         hostap_remove_interface(local->stadev, rtnl_locked, 1);
 944         local->stadev = NULL;
 945
 946         return 0;
 947 }
 948
 949
 950 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
 951 {
 952         int ret;
 953
 954         if (val < 0 || val > 1)
 955                 return -EINVAL;
 956
 957         if (local->hostapd == val)
 958                 return 0;
 959
 960         if (val) {
 961                 ret = hostap_enable_hostapd(local, rtnl_locked);
 962                 if (ret == 0)
 963                         local->hostapd = 1;
 964         } else {
 965                 local->hostapd = 0;
 966                 ret = hostap_disable_hostapd(local, rtnl_locked);
 967                 if (ret != 0)
 968                         local->hostapd = 1;
 969         }
 970
 971         return ret;
 972 }
 973
 974
 975 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
 976 {
 977         int ret;
 978
 979         if (val < 0 || val > 1)
 980                 return -EINVAL;
 981
 982         if (local->hostapd_sta == val)
 983                 return 0;
 984
 985         if (val) {
 986                 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
 987                 if (ret == 0)
 988                         local->hostapd_sta = 1;
 989         } else {
 990                 local->hostapd_sta = 0;
 991                 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
 992                 if (ret != 0)
 993                         local->hostapd_sta = 1;
 994         }
 995
 996
 997         return ret;
 998 }
 999
1000
1001 int prism2_update_comms_qual(struct net_device *dev)
1002 {
1003         struct hostap_interface *iface;
1004         local_info_t *local;
1005         int ret = 0;
1006         struct hfa384x_comms_quality sq;
1007
1008         iface = netdev_priv(dev);
1009         local = iface->local;
1010         if (!local->sta_fw_ver)
1011                 ret = -1;
1012         else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1013                 if (local->func->get_rid(local->dev,
1014                                          HFA384X_RID_DBMCOMMSQUALITY,
1015                                          &sq, sizeof(sq), 1) >= 0) {
1016                         local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1017                         local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1018                         local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1019                         local->last_comms_qual_update = jiffies;
1020                 } else
1021                         ret = -1;
1022         } else {
1023                 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1024                                          &sq, sizeof(sq), 1) >= 0) {
1025                         local->comms_qual = le16_to_cpu(sq.comm_qual);
1026                         local->avg_signal = HFA384X_LEVEL_TO_dBm(
1027                                 le16_to_cpu(sq.signal_level));
1028                         local->avg_noise = HFA384X_LEVEL_TO_dBm(
1029                                 le16_to_cpu(sq.noise_level));
1030                         local->last_comms_qual_update = jiffies;
1031                 } else
1032                         ret = -1;
1033         }
1034
1035         return ret;
1036 }
1037
1038
1039 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1040                          u8 *body, size_t bodylen)
1041 {
1042         struct sk_buff *skb;
1043         struct hostap_ieee80211_mgmt *mgmt;
1044         struct hostap_skb_tx_data *meta;
1045         struct net_device *dev = local->dev;
1046
1047         skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1048         if (skb == NULL)
1049                 return -ENOMEM;
1050
1051         mgmt = (struct hostap_ieee80211_mgmt *)
1052                 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1053         memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1054         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1055         memcpy(mgmt->da, dst, ETH_ALEN);
1056         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1057         memcpy(mgmt->bssid, dst, ETH_ALEN);
1058         if (body)
1059                 memcpy(skb_put(skb, bodylen), body, bodylen);
1060
1061         meta = (struct hostap_skb_tx_data *) skb->cb;
1062         memset(meta, 0, sizeof(*meta));
1063         meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1064         meta->iface = netdev_priv(dev);
1065
1066         skb->dev = dev;
1067         skb->mac.raw = skb->nh.raw = skb->data;
1068         dev_queue_xmit(skb);
1069
1070         return 0;
1071 }
1072
1073
1074 int prism2_sta_deauth(local_info_t *local, u16 reason)
1075 {
1076         union iwreq_data wrqu;
1077         int ret;
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         reason = cpu_to_le16(reason);
1085         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1086                                    (u8 *) &reason, 2);
1087         memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1088         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1089         return ret;
1090 }
1091
1092
1093 struct proc_dir_entry *hostap_proc;
1094
1095 static int __init hostap_init(void)
1096 {
1097         if (proc_net != NULL) {
1098                 hostap_proc = proc_mkdir("hostap", proc_net);
1099                 if (!hostap_proc)
1100                         printk(KERN_WARNING "Failed to mkdir "
1101                                "/proc/net/hostap\n");
1102         } else
1103                 hostap_proc = NULL;
1104
1105         return 0;
1106 }
1107
1108
1109 static void __exit hostap_exit(void)
1110 {
1111         if (hostap_proc != NULL) {
1112                 hostap_proc = NULL;
1113                 remove_proc_entry("hostap", proc_net);
1114         }
1115 }
1116
1117
1118 EXPORT_SYMBOL(hostap_set_word);
1119 EXPORT_SYMBOL(hostap_set_string);
1120 EXPORT_SYMBOL(hostap_get_porttype);
1121 EXPORT_SYMBOL(hostap_set_encryption);
1122 EXPORT_SYMBOL(hostap_set_antsel);
1123 EXPORT_SYMBOL(hostap_set_roaming);
1124 EXPORT_SYMBOL(hostap_set_auth_algs);
1125 EXPORT_SYMBOL(hostap_dump_rx_header);
1126 EXPORT_SYMBOL(hostap_dump_tx_header);
1127 EXPORT_SYMBOL(hostap_80211_header_parse);
1128 EXPORT_SYMBOL(hostap_80211_prism_header_parse);
1129 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1130 EXPORT_SYMBOL(hostap_get_stats);
1131 EXPORT_SYMBOL(hostap_setup_dev);
1132 EXPORT_SYMBOL(hostap_proc);
1133 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1134 EXPORT_SYMBOL(hostap_set_hostapd);
1135 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1136 EXPORT_SYMBOL(hostap_add_interface);
1137 EXPORT_SYMBOL(hostap_remove_interface);
1138 EXPORT_SYMBOL(prism2_update_comms_qual);
1139
1140 module_init(hostap_init);
1141 module_exit(hostap_exit);