drivers/net/wireless/hostap/hostap.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 <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 MODULE_VERSION(PRISM2_VERSION);
  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 /* hostap.c */
  51 static int prism2_wds_add(local_info_t *local, u8 *remote_addr,
  52                           int rtnl_locked);
  53 static int prism2_wds_del(local_info_t *local, u8 *remote_addr,
  54                           int rtnl_locked, int do_not_remove);
  55
  56 /* hostap_ap.c */
  57 static int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
  58                                   struct iw_quality qual[], int buf_size,
  59                                   int aplist);
  60 static int prism2_ap_translate_scan(struct net_device *dev, char *buffer);
  61 static int prism2_hostapd(struct ap_data *ap,
  62                           struct prism2_hostapd_param *param);
  63 static void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
  64                                 struct ieee80211_crypt_data ***crypt);
  65 static void ap_control_kickall(struct ap_data *ap);
  66 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
  67 static int ap_control_add_mac(struct mac_restrictions *mac_restrictions,
  68                               u8 *mac);
  69 static int ap_control_del_mac(struct mac_restrictions *mac_restrictions,
  70                               u8 *mac);
  71 static void ap_control_flush_macs(struct mac_restrictions *mac_restrictions);
  72 static int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev,
  73                                u8 *mac);
  74 #endif /* !PRISM2_NO_KERNEL_IEEE80211_MGMT */
  75
  76
  77 static const long freq_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
  78                                   2447, 2452, 2457, 2462, 2467, 2472, 2484 };
  79 #define FREQ_COUNT (sizeof(freq_list) / sizeof(freq_list[0]))
  80
  81
  82 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
  83 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
  84 static unsigned char rfc1042_header[] =
  85 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
  86 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
  87 static unsigned char bridge_tunnel_header[] =
  88 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
  89 /* No encapsulation header if EtherType < 0x600 (=length) */
  90
  91
  92 /* FIX: these could be compiled separately and linked together to hostap.o */
  93 #include "hostap_ap.c"
  94 #include "hostap_info.c"
  95 #include "hostap_ioctl.c"
  96 #include "hostap_proc.c"
  97 #include "hostap_80211_rx.c"
  98 #include "hostap_80211_tx.c"
  99
 100
 101 struct net_device * hostap_add_interface(struct local_info *local,
 102                                          int type, int rtnl_locked,
 103                                          const char *prefix,
 104                                          const char *name)
 105 {
 106         struct net_device *dev, *mdev;
 107         struct hostap_interface *iface;
 108         int ret;
 109
 110         dev = alloc_etherdev(sizeof(struct hostap_interface));
 111         if (dev == NULL)
 112                 return NULL;
 113
 114         iface = netdev_priv(dev);
 115         iface->dev = dev;
 116         iface->local = local;
 117         iface->type = type;
 118         list_add(&iface->list, &local->hostap_interfaces);
 119
 120         mdev = local->dev;
 121         memcpy(dev->dev_addr, mdev->dev_addr, ETH_ALEN);
 122         dev->base_addr = mdev->base_addr;
 123         dev->irq = mdev->irq;
 124         dev->mem_start = mdev->mem_start;
 125         dev->mem_end = mdev->mem_end;
 126
 127         hostap_setup_dev(dev, local, 0);
 128         dev->destructor = free_netdev;
 129
 130         sprintf(dev->name, "%s%s", prefix, name);
 131         if (!rtnl_locked)
 132                 rtnl_lock();
 133
 134         ret = 0;
 135         if (strchr(dev->name, '%'))
 136                 ret = dev_alloc_name(dev, dev->name);
 137
 138         SET_NETDEV_DEV(dev, mdev->class_dev.dev);
 139         if (ret >= 0)
 140                 ret = register_netdevice(dev);
 141
 142         if (!rtnl_locked)
 143                 rtnl_unlock();
 144
 145         if (ret < 0) {
 146                 printk(KERN_WARNING "%s: failed to add new netdevice!\n",
 147                        dev->name);
 148                 free_netdev(dev);
 149                 return NULL;
 150         }
 151
 152         printk(KERN_DEBUG "%s: registered netdevice %s\n",
 153                mdev->name, dev->name);
 154
 155         return dev;
 156 }
 157
 158
 159 void hostap_remove_interface(struct net_device *dev, int rtnl_locked,
 160                              int remove_from_list)
 161 {
 162         struct hostap_interface *iface;
 163
 164         if (!dev)
 165                 return;
 166
 167         iface = netdev_priv(dev);
 168
 169         if (remove_from_list) {
 170                 list_del(&iface->list);
 171         }
 172
 173         if (dev == iface->local->ddev)
 174                 iface->local->ddev = NULL;
 175         else if (dev == iface->local->apdev)
 176                 iface->local->apdev = NULL;
 177         else if (dev == iface->local->stadev)
 178                 iface->local->stadev = NULL;
 179
 180         if (rtnl_locked)
 181                 unregister_netdevice(dev);
 182         else
 183                 unregister_netdev(dev);
 184
 185         /* dev->destructor = free_netdev() will free the device data, including
 186          * private data, when removing the device */
 187 }
 188
 189
 190 static inline int prism2_wds_special_addr(u8 *addr)
 191 {
 192         if (addr[0] || addr[1] || addr[2] || addr[3] || addr[4] || addr[5])
 193                 return 0;
 194
 195         return 1;
 196 }
 197
 198
 199 static int prism2_wds_add(local_info_t *local, u8 *remote_addr,
 200                           int rtnl_locked)
 201 {
 202         struct net_device *dev;
 203         struct list_head *ptr;
 204         struct hostap_interface *iface, *empty, *match;
 205
 206         empty = match = NULL;
 207         read_lock_bh(&local->iface_lock);
 208         list_for_each(ptr, &local->hostap_interfaces) {
 209                 iface = list_entry(ptr, struct hostap_interface, list);
 210                 if (iface->type != HOSTAP_INTERFACE_WDS)
 211                         continue;
 212
 213                 if (prism2_wds_special_addr(iface->u.wds.remote_addr))
 214                         empty = iface;
 215                 else if (memcmp(iface->u.wds.remote_addr, remote_addr,
 216                                 ETH_ALEN) == 0) {
 217                         match = iface;
 218                         break;
 219                 }
 220         }
 221         if (!match && empty && !prism2_wds_special_addr(remote_addr)) {
 222                 /* take pre-allocated entry into use */
 223                 memcpy(empty->u.wds.remote_addr, remote_addr, ETH_ALEN);
 224                 read_unlock_bh(&local->iface_lock);
 225                 printk(KERN_DEBUG "%s: using pre-allocated WDS netdevice %s\n",
 226                        local->dev->name, empty->dev->name);
 227                 return 0;
 228         }
 229         read_unlock_bh(&local->iface_lock);
 230
 231         if (!prism2_wds_special_addr(remote_addr)) {
 232                 if (match)
 233                         return -EEXIST;
 234                 hostap_add_sta(local->ap, remote_addr);
 235         }
 236
 237         if (local->wds_connections >= local->wds_max_connections)
 238                 return -ENOBUFS;
 239
 240         /* verify that there is room for wds# postfix in the interface name */
 241         if (strlen(local->dev->name) > IFNAMSIZ - 5) {
 242                 printk(KERN_DEBUG "'%s' too long base device name\n",
 243                        local->dev->name);
 244                 return -EINVAL;
 245         }
 246
 247         dev = hostap_add_interface(local, HOSTAP_INTERFACE_WDS, rtnl_locked,
 248                                    local->ddev->name, "wds%d");
 249         if (dev == NULL)
 250                 return -ENOMEM;
 251
 252         iface = netdev_priv(dev);
 253         memcpy(iface->u.wds.remote_addr, remote_addr, ETH_ALEN);
 254
 255         local->wds_connections++;
 256
 257         return 0;
 258 }
 259
 260
 261 static int prism2_wds_del(local_info_t *local, u8 *remote_addr,
 262                           int rtnl_locked, int do_not_remove)
 263 {
 264         unsigned long flags;
 265         struct list_head *ptr;
 266         struct hostap_interface *iface, *selected = NULL;
 267
 268         write_lock_irqsave(&local->iface_lock, flags);
 269         list_for_each(ptr, &local->hostap_interfaces) {
 270                 iface = list_entry(ptr, struct hostap_interface, list);
 271                 if (iface->type != HOSTAP_INTERFACE_WDS)
 272                         continue;
 273
 274                 if (memcmp(iface->u.wds.remote_addr, remote_addr,
 275                            ETH_ALEN) == 0) {
 276                         selected = iface;
 277                         break;
 278                 }
 279         }
 280         if (selected && !do_not_remove)
 281                 list_del(&selected->list);
 282         write_unlock_irqrestore(&local->iface_lock, flags);
 283
 284         if (selected) {
 285                 if (do_not_remove)
 286                         memset(selected->u.wds.remote_addr, 0, ETH_ALEN);
 287                 else {
 288                         hostap_remove_interface(selected->dev, rtnl_locked, 0);
 289                         local->wds_connections--;
 290                 }
 291         }
 292
 293         return selected ? 0 : -ENODEV;
 294 }
 295
 296
 297 u16 hostap_tx_callback_register(local_info_t *local,
 298                                 void (*func)(struct sk_buff *, int ok, void *),
 299                                 void *data)
 300 {
 301         unsigned long flags;
 302         struct hostap_tx_callback_info *entry;
 303
 304         entry = (struct hostap_tx_callback_info *) kmalloc(sizeof(*entry),
 305                                                            GFP_ATOMIC);
 306         if (entry == NULL)
 307                 return 0;
 308
 309         entry->func = func;
 310         entry->data = data;
 311
 312         spin_lock_irqsave(&local->lock, flags);
 313         entry->idx = local->tx_callback ? local->tx_callback->idx + 1 : 1;
 314         entry->next = local->tx_callback;
 315         local->tx_callback = entry;
 316         spin_unlock_irqrestore(&local->lock, flags);
 317
 318         return entry->idx;
 319 }
 320
 321
 322 int hostap_tx_callback_unregister(local_info_t *local, u16 idx)
 323 {
 324         unsigned long flags;
 325         struct hostap_tx_callback_info *cb, *prev = NULL;
 326
 327         spin_lock_irqsave(&local->lock, flags);
 328         cb = local->tx_callback;
 329         while (cb != NULL && cb->idx != idx) {
 330                 prev = cb;
 331                 cb = cb->next;
 332         }
 333         if (cb) {
 334                 if (prev == NULL)
 335                         local->tx_callback = cb->next;
 336                 else
 337                         prev->next = cb->next;
 338                 kfree(cb);
 339         }
 340         spin_unlock_irqrestore(&local->lock, flags);
 341
 342         return cb ? 0 : -1;
 343 }
 344
 345
 346 /* val is in host byte order */
 347 int hostap_set_word(struct net_device *dev, int rid, u16 val)
 348 {
 349         struct hostap_interface *iface;
 350         u16 tmp = cpu_to_le16(val);
 351         iface = netdev_priv(dev);
 352         return iface->local->func->set_rid(dev, rid, &tmp, 2);
 353 }
 354
 355
 356 int hostap_set_string(struct net_device *dev, int rid, const char *val)
 357 {
 358         struct hostap_interface *iface;
 359         char buf[MAX_SSID_LEN + 2];
 360         int len;
 361
 362         iface = netdev_priv(dev);
 363         len = strlen(val);
 364         if (len > MAX_SSID_LEN)
 365                 return -1;
 366         memset(buf, 0, sizeof(buf));
 367         buf[0] = len; /* little endian 16 bit word */
 368         memcpy(buf + 2, val, len);
 369
 370         return iface->local->func->set_rid(dev, rid, &buf, MAX_SSID_LEN + 2);
 371 }
 372
 373
 374 u16 hostap_get_porttype(local_info_t *local)
 375 {
 376         if (local->iw_mode == IW_MODE_ADHOC && local->pseudo_adhoc)
 377                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 378         if (local->iw_mode == IW_MODE_ADHOC)
 379                 return HFA384X_PORTTYPE_IBSS;
 380         if (local->iw_mode == IW_MODE_INFRA)
 381                 return HFA384X_PORTTYPE_BSS;
 382         if (local->iw_mode == IW_MODE_REPEAT)
 383                 return HFA384X_PORTTYPE_WDS;
 384         if (local->iw_mode == IW_MODE_MONITOR)
 385                 return HFA384X_PORTTYPE_PSEUDO_IBSS;
 386         return HFA384X_PORTTYPE_HOSTAP;
 387 }
 388
 389
 390 int hostap_set_encryption(local_info_t *local)
 391 {
 392         u16 val, old_val;
 393         int i, keylen, len, idx;
 394         char keybuf[WEP_KEY_LEN + 1];
 395         enum { NONE, WEP, OTHER } encrypt_type;
 396
 397         idx = local->tx_keyidx;
 398         if (local->crypt[idx] == NULL || local->crypt[idx]->ops == NULL)
 399                 encrypt_type = NONE;
 400         else if (strcmp(local->crypt[idx]->ops->name, "WEP") == 0)
 401                 encrypt_type = WEP;
 402         else
 403                 encrypt_type = OTHER;
 404
 405         if (local->func->get_rid(local->dev, HFA384X_RID_CNFWEPFLAGS, &val, 2,
 406                                  1) < 0) {
 407                 printk(KERN_DEBUG "Could not read current WEP flags.\n");
 408                 goto fail;
 409         }
 410         le16_to_cpus(&val);
 411         old_val = val;
 412
 413         if (encrypt_type != NONE || local->privacy_invoked)
 414                 val |= HFA384X_WEPFLAGS_PRIVACYINVOKED;
 415         else
 416                 val &= ~HFA384X_WEPFLAGS_PRIVACYINVOKED;
 417
 418         if (local->open_wep || encrypt_type == NONE ||
 419             ((local->ieee_802_1x || local->wpa) && local->host_decrypt))
 420                 val &= ~HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 421         else
 422                 val |= HFA384X_WEPFLAGS_EXCLUDEUNENCRYPTED;
 423
 424         if ((encrypt_type != NONE || local->privacy_invoked) &&
 425             (encrypt_type == OTHER || local->host_encrypt))
 426                 val |= HFA384X_WEPFLAGS_HOSTENCRYPT;
 427         else
 428                 val &= ~HFA384X_WEPFLAGS_HOSTENCRYPT;
 429         if ((encrypt_type != NONE || local->privacy_invoked) &&
 430             (encrypt_type == OTHER || local->host_decrypt))
 431                 val |= HFA384X_WEPFLAGS_HOSTDECRYPT;
 432         else
 433                 val &= ~HFA384X_WEPFLAGS_HOSTDECRYPT;
 434
 435         if (val != old_val &&
 436             hostap_set_word(local->dev, HFA384X_RID_CNFWEPFLAGS, val)) {
 437                 printk(KERN_DEBUG "Could not write new WEP flags (0x%x)\n",
 438                        val);
 439                 goto fail;
 440         }
 441
 442         if (encrypt_type != WEP)
 443                 return 0;
 444
 445         /* 104-bit support seems to require that all the keys are set to the
 446          * same keylen */
 447         keylen = 6; /* first 5 octets */
 448         len = local->crypt[idx]->ops->get_key(keybuf, sizeof(keybuf),
 449                                               NULL, local->crypt[idx]->priv);
 450         if (idx >= 0 && idx < WEP_KEYS && len > 5)
 451                 keylen = WEP_KEY_LEN + 1; /* first 13 octets */
 452
 453         for (i = 0; i < WEP_KEYS; i++) {
 454                 memset(keybuf, 0, sizeof(keybuf));
 455                 if (local->crypt[i]) {
 456                         (void) local->crypt[i]->ops->get_key(
 457                                 keybuf, sizeof(keybuf),
 458                                 NULL, local->crypt[i]->priv);
 459                 }
 460                 if (local->func->set_rid(local->dev,
 461                                          HFA384X_RID_CNFDEFAULTKEY0 + i,
 462                                          keybuf, keylen)) {
 463                         printk(KERN_DEBUG "Could not set key %d (len=%d)\n",
 464                                i, keylen);
 465                         goto fail;
 466                 }
 467         }
 468         if (hostap_set_word(local->dev, HFA384X_RID_CNFWEPDEFAULTKEYID, idx)) {
 469                 printk(KERN_DEBUG "Could not set default keyid %d\n", idx);
 470                 goto fail;
 471         }
 472
 473         return 0;
 474
 475  fail:
 476         printk(KERN_DEBUG "%s: encryption setup failed\n", local->dev->name);
 477         return -1;
 478 }
 479
 480
 481 int hostap_set_antsel(local_info_t *local)
 482 {
 483         u16 val;
 484         int ret = 0;
 485
 486         if (local->antsel_tx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 487             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 488                              HFA386X_CR_TX_CONFIGURE,
 489                              NULL, &val) == 0) {
 490                 val &= ~(BIT(2) | BIT(1));
 491                 switch (local->antsel_tx) {
 492                 case HOSTAP_ANTSEL_DIVERSITY:
 493                         val |= BIT(1);
 494                         break;
 495                 case HOSTAP_ANTSEL_LOW:
 496                         break;
 497                 case HOSTAP_ANTSEL_HIGH:
 498                         val |= BIT(2);
 499                         break;
 500                 }
 501
 502                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 503                                      HFA386X_CR_TX_CONFIGURE, &val, NULL)) {
 504                         printk(KERN_INFO "%s: setting TX AntSel failed\n",
 505                                local->dev->name);
 506                         ret = -1;
 507                 }
 508         }
 509
 510         if (local->antsel_rx != HOSTAP_ANTSEL_DO_NOT_TOUCH &&
 511             local->func->cmd(local->dev, HFA384X_CMDCODE_READMIF,
 512                              HFA386X_CR_RX_CONFIGURE,
 513                              NULL, &val) == 0) {
 514                 val &= ~(BIT(1) | BIT(0));
 515                 switch (local->antsel_rx) {
 516                 case HOSTAP_ANTSEL_DIVERSITY:
 517                         break;
 518                 case HOSTAP_ANTSEL_LOW:
 519                         val |= BIT(0);
 520                         break;
 521                 case HOSTAP_ANTSEL_HIGH:
 522                         val |= BIT(0) | BIT(1);
 523                         break;
 524                 }
 525
 526                 if (local->func->cmd(local->dev, HFA384X_CMDCODE_WRITEMIF,
 527                                      HFA386X_CR_RX_CONFIGURE, &val, NULL)) {
 528                         printk(KERN_INFO "%s: setting RX AntSel failed\n",
 529                                local->dev->name);
 530                         ret = -1;
 531                 }
 532         }
 533
 534         return ret;
 535 }
 536
 537
 538 int hostap_set_roaming(local_info_t *local)
 539 {
 540         u16 val;
 541
 542         switch (local->host_roaming) {
 543         case 1:
 544                 val = HFA384X_ROAMING_HOST;
 545                 break;
 546         case 2:
 547                 val = HFA384X_ROAMING_DISABLED;
 548                 break;
 549         case 0:
 550         default:
 551                 val = HFA384X_ROAMING_FIRMWARE;
 552                 break;
 553         }
 554
 555         return hostap_set_word(local->dev, HFA384X_RID_CNFROAMINGMODE, val);
 556 }
 557
 558
 559 int hostap_set_auth_algs(local_info_t *local)
 560 {
 561         int val = local->auth_algs;
 562         /* At least STA f/w v0.6.2 seems to have issues with cnfAuthentication
 563          * set to include both Open and Shared Key flags. It tries to use
 564          * Shared Key authentication in that case even if WEP keys are not
 565          * configured.. STA f/w v0.7.6 is able to handle such configuration,
 566          * but it is unknown when this was fixed between 0.6.2 .. 0.7.6. */
 567         if (local->sta_fw_ver < PRISM2_FW_VER(0,7,0) &&
 568             val != PRISM2_AUTH_OPEN && val != PRISM2_AUTH_SHARED_KEY)
 569                 val = PRISM2_AUTH_OPEN;
 570
 571         if (hostap_set_word(local->dev, HFA384X_RID_CNFAUTHENTICATION, val)) {
 572                 printk(KERN_INFO "%s: cnfAuthentication setting to 0x%x "
 573                        "failed\n", local->dev->name, local->auth_algs);
 574                 return -EINVAL;
 575         }
 576
 577         return 0;
 578 }
 579
 580
 581 void hostap_dump_rx_header(const char *name, const struct hfa384x_rx_frame *rx)
 582 {
 583         u16 status, fc;
 584
 585         status = __le16_to_cpu(rx->status);
 586
 587         printk(KERN_DEBUG "%s: RX status=0x%04x (port=%d, type=%d, "
 588                "fcserr=%d) silence=%d signal=%d rate=%d rxflow=%d; "
 589                "jiffies=%ld\n",
 590                name, status, (status >> 8) & 0x07, status >> 13, status & 1,
 591                rx->silence, rx->signal, rx->rate, rx->rxflow, jiffies);
 592
 593         fc = __le16_to_cpu(rx->frame_control);
 594         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 595                "data_len=%d%s%s\n",
 596                fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
 597                __le16_to_cpu(rx->duration_id), __le16_to_cpu(rx->seq_ctrl),
 598                __le16_to_cpu(rx->data_len),
 599                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 600                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 601
 602         printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
 603                MACSTR "\n",
 604                MAC2STR(rx->addr1), MAC2STR(rx->addr2), MAC2STR(rx->addr3),
 605                MAC2STR(rx->addr4));
 606
 607         printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
 608                MAC2STR(rx->dst_addr), MAC2STR(rx->src_addr),
 609                __be16_to_cpu(rx->len));
 610 }
 611
 612
 613 void hostap_dump_tx_header(const char *name, const struct hfa384x_tx_frame *tx)
 614 {
 615         u16 fc;
 616
 617         printk(KERN_DEBUG "%s: TX status=0x%04x retry_count=%d tx_rate=%d "
 618                "tx_control=0x%04x; jiffies=%ld\n",
 619                name, __le16_to_cpu(tx->status), tx->retry_count, tx->tx_rate,
 620                __le16_to_cpu(tx->tx_control), jiffies);
 621
 622         fc = __le16_to_cpu(tx->frame_control);
 623         printk(KERN_DEBUG "   FC=0x%04x (type=%d:%d) dur=0x%04x seq=0x%04x "
 624                "data_len=%d%s%s\n",
 625                fc, WLAN_FC_GET_TYPE(fc) >> 2, WLAN_FC_GET_STYPE(fc) >> 4,
 626                __le16_to_cpu(tx->duration_id), __le16_to_cpu(tx->seq_ctrl),
 627                __le16_to_cpu(tx->data_len),
 628                fc & IEEE80211_FCTL_TODS ? " [ToDS]" : "",
 629                fc & IEEE80211_FCTL_FROMDS ? " [FromDS]" : "");
 630
 631         printk(KERN_DEBUG "   A1=" MACSTR " A2=" MACSTR " A3=" MACSTR " A4="
 632                MACSTR "\n",
 633                MAC2STR(tx->addr1), MAC2STR(tx->addr2), MAC2STR(tx->addr3),
 634                MAC2STR(tx->addr4));
 635
 636         printk(KERN_DEBUG "   dst=" MACSTR " src=" MACSTR " len=%d\n",
 637                MAC2STR(tx->dst_addr), MAC2STR(tx->src_addr),
 638                __be16_to_cpu(tx->len));
 639 }
 640
 641
 642 int hostap_80211_header_parse(struct sk_buff *skb, unsigned char *haddr)
 643 {
 644         memcpy(haddr, skb->mac.raw + 10, ETH_ALEN); /* addr2 */
 645         return ETH_ALEN;
 646 }
 647
 648
 649 int hostap_80211_prism_header_parse(struct sk_buff *skb, unsigned char *haddr)
 650 {
 651         if (*(u32 *)skb->mac.raw == LWNG_CAP_DID_BASE) {
 652                 memcpy(haddr, skb->mac.raw +
 653                        sizeof(struct linux_wlan_ng_prism_hdr) + 10,
 654                        ETH_ALEN); /* addr2 */
 655         } else { /* (*(u32 *)skb->mac.raw == htonl(LWNG_CAPHDR_VERSION)) */
 656                 memcpy(haddr, skb->mac.raw +
 657                        sizeof(struct linux_wlan_ng_cap_hdr) + 10,
 658                        ETH_ALEN); /* addr2 */
 659         }
 660         return ETH_ALEN;
 661 }
 662
 663
 664 int hostap_80211_get_hdrlen(u16 fc)
 665 {
 666         int hdrlen = 24;
 667
 668         switch (WLAN_FC_GET_TYPE(fc)) {
 669         case IEEE80211_FTYPE_DATA:
 670                 if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS))
 671                         hdrlen = 30; /* Addr4 */
 672                 break;
 673         case IEEE80211_FTYPE_CTL:
 674                 switch (WLAN_FC_GET_STYPE(fc)) {
 675                 case IEEE80211_STYPE_CTS:
 676                 case IEEE80211_STYPE_ACK:
 677                         hdrlen = 10;
 678                         break;
 679                 default:
 680                         hdrlen = 16;
 681                         break;
 682                 }
 683                 break;
 684         }
 685
 686         return hdrlen;
 687 }
 688
 689
 690 struct net_device_stats *hostap_get_stats(struct net_device *dev)
 691 {
 692         struct hostap_interface *iface;
 693         iface = netdev_priv(dev);
 694         return &iface->stats;
 695 }
 696
 697
 698 static int prism2_close(struct net_device *dev)
 699 {
 700         struct hostap_interface *iface;
 701         local_info_t *local;
 702
 703         PDEBUG(DEBUG_FLOW, "%s: prism2_close\n", dev->name);
 704
 705         iface = netdev_priv(dev);
 706         local = iface->local;
 707
 708         if (dev == local->ddev) {
 709                 prism2_sta_deauth(local, WLAN_REASON_DEAUTH_LEAVING);
 710         }
 711 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 712         if (!local->hostapd && dev == local->dev &&
 713             (!local->func->card_present || local->func->card_present(local)) &&
 714             local->hw_ready && local->ap && local->iw_mode == IW_MODE_MASTER)
 715                 hostap_deauth_all_stas(dev, local->ap, 1);
 716 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 717
 718         if (dev == local->dev) {
 719                 local->func->hw_shutdown(dev, HOSTAP_HW_ENABLE_CMDCOMPL);
 720         }
 721
 722         if (netif_running(dev)) {
 723                 netif_stop_queue(dev);
 724                 netif_device_detach(dev);
 725         }
 726
 727         flush_scheduled_work();
 728
 729         module_put(local->hw_module);
 730
 731         local->num_dev_open--;
 732
 733         if (dev != local->dev && local->dev->flags & IFF_UP &&
 734             local->master_dev_auto_open && local->num_dev_open == 1) {
 735                 /* Close master radio interface automatically if it was also
 736                  * opened automatically and we are now closing the last
 737                  * remaining non-master device. */
 738                 dev_close(local->dev);
 739         }
 740
 741         return 0;
 742 }
 743
 744
 745 static int prism2_open(struct net_device *dev)
 746 {
 747         struct hostap_interface *iface;
 748         local_info_t *local;
 749
 750         PDEBUG(DEBUG_FLOW, "%s: prism2_open\n", dev->name);
 751
 752         iface = netdev_priv(dev);
 753         local = iface->local;
 754
 755         if (local->no_pri) {
 756                 printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
 757                        "f/w\n", dev->name);
 758                 return 1;
 759         }
 760
 761         if ((local->func->card_present && !local->func->card_present(local)) ||
 762             local->hw_downloading)
 763                 return -ENODEV;
 764
 765         if (!try_module_get(local->hw_module))
 766                 return -ENODEV;
 767         local->num_dev_open++;
 768
 769         if (!local->dev_enabled && local->func->hw_enable(dev, 1)) {
 770                 printk(KERN_WARNING "%s: could not enable MAC port\n",
 771                        dev->name);
 772                 prism2_close(dev);
 773                 return 1;
 774         }
 775         if (!local->dev_enabled)
 776                 prism2_callback(local, PRISM2_CALLBACK_ENABLE);
 777         local->dev_enabled = 1;
 778
 779         if (dev != local->dev && !(local->dev->flags & IFF_UP)) {
 780                 /* Master radio interface is needed for all operation, so open
 781                  * it automatically when any virtual net_device is opened. */
 782                 local->master_dev_auto_open = 1;
 783                 dev_open(local->dev);
 784         }
 785
 786         netif_device_attach(dev);
 787         netif_start_queue(dev);
 788
 789         return 0;
 790 }
 791
 792
 793 static int prism2_set_mac_address(struct net_device *dev, void *p)
 794 {
 795         struct hostap_interface *iface;
 796         local_info_t *local;
 797         struct list_head *ptr;
 798         struct sockaddr *addr = p;
 799
 800         iface = netdev_priv(dev);
 801         local = iface->local;
 802
 803         if (local->func->set_rid(dev, HFA384X_RID_CNFOWNMACADDR, addr->sa_data,
 804                                  ETH_ALEN) < 0 || local->func->reset_port(dev))
 805                 return -EINVAL;
 806
 807         read_lock_bh(&local->iface_lock);
 808         list_for_each(ptr, &local->hostap_interfaces) {
 809                 iface = list_entry(ptr, struct hostap_interface, list);
 810                 memcpy(iface->dev->dev_addr, addr->sa_data, ETH_ALEN);
 811         }
 812         memcpy(local->dev->dev_addr, addr->sa_data, ETH_ALEN);
 813         read_unlock_bh(&local->iface_lock);
 814
 815         return 0;
 816 }
 817
 818
 819 /* TODO: to be further implemented as soon as Prism2 fully supports
 820  *       GroupAddresses and correct documentation is available */
 821 void hostap_set_multicast_list_queue(void *data)
 822 {
 823         struct net_device *dev = (struct net_device *) data;
 824         struct hostap_interface *iface;
 825         local_info_t *local;
 826
 827         iface = netdev_priv(dev);
 828         local = iface->local;
 829         if (hostap_set_word(dev, HFA384X_RID_PROMISCUOUSMODE,
 830                             local->is_promisc)) {
 831                 printk(KERN_INFO "%s: %sabling promiscuous mode failed\n",
 832                        dev->name, local->is_promisc ? "en" : "dis");
 833         }
 834 }
 835
 836
 837 static void hostap_set_multicast_list(struct net_device *dev)
 838 {
 839 #if 0
 840         /* FIX: promiscuous mode seems to be causing a lot of problems with
 841          * some station firmware versions (FCSErr frames, invalid MACPort, etc.
 842          * corrupted incoming frames). This code is now commented out while the
 843          * problems are investigated. */
 844         struct hostap_interface *iface;
 845         local_info_t *local;
 846
 847         iface = netdev_priv(dev);
 848         local = iface->local;
 849         if ((dev->flags & IFF_ALLMULTI) || (dev->flags & IFF_PROMISC)) {
 850                 local->is_promisc = 1;
 851         } else {
 852                 local->is_promisc = 0;
 853         }
 854
 855         schedule_work(&local->set_multicast_list_queue);
 856 #endif
 857 }
 858
 859
 860 static int prism2_change_mtu(struct net_device *dev, int new_mtu)
 861 {
 862         if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU)
 863                 return -EINVAL;
 864
 865         dev->mtu = new_mtu;
 866         return 0;
 867 }
 868
 869
 870 static void prism2_tx_timeout(struct net_device *dev)
 871 {
 872         struct hostap_interface *iface;
 873         local_info_t *local;
 874         struct hfa384x_regs regs;
 875
 876         iface = netdev_priv(dev);
 877         local = iface->local;
 878
 879         printk(KERN_WARNING "%s Tx timed out! Resetting card\n", dev->name);
 880         netif_stop_queue(local->dev);
 881
 882         local->func->read_regs(dev, &regs);
 883         printk(KERN_DEBUG "%s: CMD=%04x EVSTAT=%04x "
 884                "OFFSET0=%04x OFFSET1=%04x SWSUPPORT0=%04x\n",
 885                dev->name, regs.cmd, regs.evstat, regs.offset0, regs.offset1,
 886                regs.swsupport0);
 887
 888         local->func->schedule_reset(local);
 889 }
 890
 891
 892 void hostap_setup_dev(struct net_device *dev, local_info_t *local,
 893                       int main_dev)
 894 {
 895         struct hostap_interface *iface;
 896
 897         iface = netdev_priv(dev);
 898         ether_setup(dev);
 899
 900         /* kernel callbacks */
 901         dev->get_stats = hostap_get_stats;
 902         if (iface) {
 903                 /* Currently, we point to the proper spy_data only on
 904                  * the main_dev. This could be fixed. Jean II */
 905                 iface->wireless_data.spy_data = &iface->spy_data;
 906                 dev->wireless_data = &iface->wireless_data;
 907         }
 908         dev->wireless_handlers =
 909                 (struct iw_handler_def *) &hostap_iw_handler_def;
 910         dev->do_ioctl = hostap_ioctl;
 911         dev->open = prism2_open;
 912         dev->stop = prism2_close;
 913         dev->hard_start_xmit = hostap_data_start_xmit;
 914         dev->set_mac_address = prism2_set_mac_address;
 915         dev->set_multicast_list = hostap_set_multicast_list;
 916         dev->change_mtu = prism2_change_mtu;
 917         dev->tx_timeout = prism2_tx_timeout;
 918         dev->watchdog_timeo = TX_TIMEOUT;
 919
 920         dev->mtu = local->mtu;
 921         if (!main_dev) {
 922                 /* use main radio device queue */
 923                 dev->tx_queue_len = 0;
 924         }
 925
 926         SET_ETHTOOL_OPS(dev, &prism2_ethtool_ops);
 927
 928         netif_stop_queue(dev);
 929 }
 930
 931
 932 static int hostap_enable_hostapd(local_info_t *local, int rtnl_locked)
 933 {
 934         struct net_device *dev = local->dev;
 935
 936         if (local->apdev)
 937                 return -EEXIST;
 938
 939         printk(KERN_DEBUG "%s: enabling hostapd mode\n", dev->name);
 940
 941         local->apdev = hostap_add_interface(local, HOSTAP_INTERFACE_AP,
 942                                             rtnl_locked, local->ddev->name,
 943                                             "ap");
 944         if (local->apdev == NULL)
 945                 return -ENOMEM;
 946
 947         local->apdev->hard_start_xmit = hostap_mgmt_start_xmit;
 948         local->apdev->type = ARPHRD_IEEE80211;
 949         local->apdev->hard_header_parse = hostap_80211_header_parse;
 950
 951         return 0;
 952 }
 953
 954
 955 static int hostap_disable_hostapd(local_info_t *local, int rtnl_locked)
 956 {
 957         struct net_device *dev = local->dev;
 958
 959         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 960
 961         hostap_remove_interface(local->apdev, rtnl_locked, 1);
 962         local->apdev = NULL;
 963
 964         return 0;
 965 }
 966
 967
 968 static int hostap_enable_hostapd_sta(local_info_t *local, int rtnl_locked)
 969 {
 970         struct net_device *dev = local->dev;
 971
 972         if (local->stadev)
 973                 return -EEXIST;
 974
 975         printk(KERN_DEBUG "%s: enabling hostapd STA mode\n", dev->name);
 976
 977         local->stadev = hostap_add_interface(local, HOSTAP_INTERFACE_STA,
 978                                              rtnl_locked, local->ddev->name,
 979                                              "sta");
 980         if (local->stadev == NULL)
 981                 return -ENOMEM;
 982
 983         return 0;
 984 }
 985
 986
 987 static int hostap_disable_hostapd_sta(local_info_t *local, int rtnl_locked)
 988 {
 989         struct net_device *dev = local->dev;
 990
 991         printk(KERN_DEBUG "%s: disabling hostapd mode\n", dev->name);
 992
 993         hostap_remove_interface(local->stadev, rtnl_locked, 1);
 994         local->stadev = NULL;
 995
 996         return 0;
 997 }
 998
 999
1000 int hostap_set_hostapd(local_info_t *local, int val, int rtnl_locked)
1001 {
1002         int ret;
1003
1004         if (val < 0 || val > 1)
1005                 return -EINVAL;
1006
1007         if (local->hostapd == val)
1008                 return 0;
1009
1010         if (val) {
1011                 ret = hostap_enable_hostapd(local, rtnl_locked);
1012                 if (ret == 0)
1013                         local->hostapd = 1;
1014         } else {
1015                 local->hostapd = 0;
1016                 ret = hostap_disable_hostapd(local, rtnl_locked);
1017                 if (ret != 0)
1018                         local->hostapd = 1;
1019         }
1020
1021         return ret;
1022 }
1023
1024
1025 int hostap_set_hostapd_sta(local_info_t *local, int val, int rtnl_locked)
1026 {
1027         int ret;
1028
1029         if (val < 0 || val > 1)
1030                 return -EINVAL;
1031
1032         if (local->hostapd_sta == val)
1033                 return 0;
1034
1035         if (val) {
1036                 ret = hostap_enable_hostapd_sta(local, rtnl_locked);
1037                 if (ret == 0)
1038                         local->hostapd_sta = 1;
1039         } else {
1040                 local->hostapd_sta = 0;
1041                 ret = hostap_disable_hostapd_sta(local, rtnl_locked);
1042                 if (ret != 0)
1043                         local->hostapd_sta = 1;
1044         }
1045
1046
1047         return ret;
1048 }
1049
1050
1051 int prism2_update_comms_qual(struct net_device *dev)
1052 {
1053         struct hostap_interface *iface;
1054         local_info_t *local;
1055         int ret = 0;
1056         struct hfa384x_comms_quality sq;
1057
1058         iface = netdev_priv(dev);
1059         local = iface->local;
1060         if (!local->sta_fw_ver)
1061                 ret = -1;
1062         else if (local->sta_fw_ver >= PRISM2_FW_VER(1,3,1)) {
1063                 if (local->func->get_rid(local->dev,
1064                                          HFA384X_RID_DBMCOMMSQUALITY,
1065                                          &sq, sizeof(sq), 1) >= 0) {
1066                         local->comms_qual = (s16) le16_to_cpu(sq.comm_qual);
1067                         local->avg_signal = (s16) le16_to_cpu(sq.signal_level);
1068                         local->avg_noise = (s16) le16_to_cpu(sq.noise_level);
1069                         local->last_comms_qual_update = jiffies;
1070                 } else
1071                         ret = -1;
1072         } else {
1073                 if (local->func->get_rid(local->dev, HFA384X_RID_COMMSQUALITY,
1074                                          &sq, sizeof(sq), 1) >= 0) {
1075                         local->comms_qual = le16_to_cpu(sq.comm_qual);
1076                         local->avg_signal = HFA384X_LEVEL_TO_dBm(
1077                                 le16_to_cpu(sq.signal_level));
1078                         local->avg_noise = HFA384X_LEVEL_TO_dBm(
1079                                 le16_to_cpu(sq.noise_level));
1080                         local->last_comms_qual_update = jiffies;
1081                 } else
1082                         ret = -1;
1083         }
1084
1085         return ret;
1086 }
1087
1088
1089 int prism2_sta_send_mgmt(local_info_t *local, u8 *dst, u16 stype,
1090                          u8 *body, size_t bodylen)
1091 {
1092         struct sk_buff *skb;
1093         struct hostap_ieee80211_mgmt *mgmt;
1094         struct hostap_skb_tx_data *meta;
1095         struct net_device *dev = local->dev;
1096
1097         skb = dev_alloc_skb(IEEE80211_MGMT_HDR_LEN + bodylen);
1098         if (skb == NULL)
1099                 return -ENOMEM;
1100
1101         mgmt = (struct hostap_ieee80211_mgmt *)
1102                 skb_put(skb, IEEE80211_MGMT_HDR_LEN);
1103         memset(mgmt, 0, IEEE80211_MGMT_HDR_LEN);
1104         mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1105         memcpy(mgmt->da, dst, ETH_ALEN);
1106         memcpy(mgmt->sa, dev->dev_addr, ETH_ALEN);
1107         memcpy(mgmt->bssid, dst, ETH_ALEN);
1108         if (body)
1109                 memcpy(skb_put(skb, bodylen), body, bodylen);
1110
1111         meta = (struct hostap_skb_tx_data *) skb->cb;
1112         memset(meta, 0, sizeof(*meta));
1113         meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
1114         meta->iface = netdev_priv(dev);
1115
1116         skb->dev = dev;
1117         skb->mac.raw = skb->nh.raw = skb->data;
1118         dev_queue_xmit(skb);
1119
1120         return 0;
1121 }
1122
1123
1124 int prism2_sta_deauth(local_info_t *local, u16 reason)
1125 {
1126         union iwreq_data wrqu;
1127         int ret;
1128
1129         if (local->iw_mode != IW_MODE_INFRA ||
1130             memcmp(local->bssid, "\x00\x00\x00\x00\x00\x00", ETH_ALEN) == 0 ||
1131             memcmp(local->bssid, "\x44\x44\x44\x44\x44\x44", ETH_ALEN) == 0)
1132                 return 0;
1133
1134         reason = cpu_to_le16(reason);
1135         ret = prism2_sta_send_mgmt(local, local->bssid, IEEE80211_STYPE_DEAUTH,
1136                                    (u8 *) &reason, 2);
1137         memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1138         wireless_send_event(local->dev, SIOCGIWAP, &wrqu, NULL);
1139         return ret;
1140 }
1141
1142
1143 struct proc_dir_entry *hostap_proc;
1144
1145 static int __init hostap_init(void)
1146 {
1147         if (proc_net != NULL) {
1148                 hostap_proc = proc_mkdir("hostap", proc_net);
1149                 if (!hostap_proc)
1150                         printk(KERN_WARNING "Failed to mkdir "
1151                                "/proc/net/hostap\n");
1152         } else
1153                 hostap_proc = NULL;
1154
1155         return 0;
1156 }
1157
1158
1159 static void __exit hostap_exit(void)
1160 {
1161         if (hostap_proc != NULL) {
1162                 hostap_proc = NULL;
1163                 remove_proc_entry("hostap", proc_net);
1164         }
1165 }
1166
1167
1168 EXPORT_SYMBOL(hostap_set_word);
1169 EXPORT_SYMBOL(hostap_set_string);
1170 EXPORT_SYMBOL(hostap_get_porttype);
1171 EXPORT_SYMBOL(hostap_set_encryption);
1172 EXPORT_SYMBOL(hostap_set_antsel);
1173 EXPORT_SYMBOL(hostap_set_roaming);
1174 EXPORT_SYMBOL(hostap_set_auth_algs);
1175 EXPORT_SYMBOL(hostap_dump_rx_header);
1176 EXPORT_SYMBOL(hostap_dump_tx_header);
1177 EXPORT_SYMBOL(hostap_80211_header_parse);
1178 EXPORT_SYMBOL(hostap_80211_prism_header_parse);
1179 EXPORT_SYMBOL(hostap_80211_get_hdrlen);
1180 EXPORT_SYMBOL(hostap_get_stats);
1181 EXPORT_SYMBOL(hostap_setup_dev);
1182 EXPORT_SYMBOL(hostap_proc);
1183 EXPORT_SYMBOL(hostap_set_multicast_list_queue);
1184 EXPORT_SYMBOL(hostap_set_hostapd);
1185 EXPORT_SYMBOL(hostap_set_hostapd_sta);
1186 EXPORT_SYMBOL(hostap_add_interface);
1187 EXPORT_SYMBOL(hostap_remove_interface);
1188 EXPORT_SYMBOL(prism2_update_comms_qual);
1189
1190 module_init(hostap_init);
1191 module_exit(hostap_exit);