linux/drivers/net/wireless/hostap/hostap_ap.c
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   1/*
   2 * Intersil Prism2 driver with Host AP (software access point) support
   3 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   4 * <j@w1.fi>
   5 * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
   6 *
   7 * This file is to be included into hostap.c when S/W AP functionality is
   8 * compiled.
   9 *
  10 * AP:  FIX:
  11 * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
  12 *   unauthenticated STA, send deauth. frame (8802.11: 5.5)
  13 * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
  14 *   from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
  15 * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
  16 *   (8802.11: 5.5)
  17 */
  18
  19#include <linux/proc_fs.h>
  20#include <linux/delay.h>
  21#include <linux/random.h>
  22#include <linux/if_arp.h>
  23
  24#include "hostap_wlan.h"
  25#include "hostap.h"
  26#include "hostap_ap.h"
  27
  28static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
  29                                                 DEF_INTS };
  30module_param_array(other_ap_policy, int, NULL, 0444);
  31MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
  32
  33static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
  34                                                   DEF_INTS };
  35module_param_array(ap_max_inactivity, int, NULL, 0444);
  36MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
  37                 "inactivity");
  38
  39static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
  40module_param_array(ap_bridge_packets, int, NULL, 0444);
  41MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
  42                 "stations");
  43
  44static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
  45module_param_array(autom_ap_wds, int, NULL, 0444);
  46MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
  47                 "automatically");
  48
  49
  50static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
  51static void hostap_event_expired_sta(struct net_device *dev,
  52                                     struct sta_info *sta);
  53static void handle_add_proc_queue(struct work_struct *work);
  54
  55#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
  56static void handle_wds_oper_queue(struct work_struct *work);
  57static void prism2_send_mgmt(struct net_device *dev,
  58                             u16 type_subtype, char *body,
  59                             int body_len, u8 *addr, u16 tx_cb_idx);
  60#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
  61
  62
  63#ifndef PRISM2_NO_PROCFS_DEBUG
  64static int ap_debug_proc_read(char *page, char **start, off_t off,
  65                              int count, int *eof, void *data)
  66{
  67        char *p = page;
  68        struct ap_data *ap = (struct ap_data *) data;
  69
  70        if (off != 0) {
  71                *eof = 1;
  72                return 0;
  73        }
  74
  75        p += sprintf(p, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
  76        p += sprintf(p, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
  77        p += sprintf(p, "max_inactivity=%u\n", ap->max_inactivity / HZ);
  78        p += sprintf(p, "bridge_packets=%u\n", ap->bridge_packets);
  79        p += sprintf(p, "nullfunc_ack=%u\n", ap->nullfunc_ack);
  80        p += sprintf(p, "autom_ap_wds=%u\n", ap->autom_ap_wds);
  81        p += sprintf(p, "auth_algs=%u\n", ap->local->auth_algs);
  82        p += sprintf(p, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
  83
  84        return (p - page);
  85}
  86#endif /* PRISM2_NO_PROCFS_DEBUG */
  87
  88
  89static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
  90{
  91        sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
  92        ap->sta_hash[STA_HASH(sta->addr)] = sta;
  93}
  94
  95static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
  96{
  97        struct sta_info *s;
  98
  99        s = ap->sta_hash[STA_HASH(sta->addr)];
 100        if (s == NULL) return;
 101        if (memcmp(s->addr, sta->addr, ETH_ALEN) == 0) {
 102                ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
 103                return;
 104        }
 105
 106        while (s->hnext != NULL && memcmp(s->hnext->addr, sta->addr, ETH_ALEN)
 107               != 0)
 108                s = s->hnext;
 109        if (s->hnext != NULL)
 110                s->hnext = s->hnext->hnext;
 111        else
 112                printk("AP: could not remove STA %pM from hash table\n",
 113                       sta->addr);
 114}
 115
 116static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
 117{
 118        if (sta->ap && sta->local)
 119                hostap_event_expired_sta(sta->local->dev, sta);
 120
 121        if (ap->proc != NULL) {
 122                char name[20];
 123                sprintf(name, "%pM", sta->addr);
 124                remove_proc_entry(name, ap->proc);
 125        }
 126
 127        if (sta->crypt) {
 128                sta->crypt->ops->deinit(sta->crypt->priv);
 129                kfree(sta->crypt);
 130                sta->crypt = NULL;
 131        }
 132
 133        skb_queue_purge(&sta->tx_buf);
 134
 135        ap->num_sta--;
 136#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 137        if (sta->aid > 0)
 138                ap->sta_aid[sta->aid - 1] = NULL;
 139
 140        if (!sta->ap && sta->u.sta.challenge)
 141                kfree(sta->u.sta.challenge);
 142        del_timer(&sta->timer);
 143#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 144
 145        kfree(sta);
 146}
 147
 148
 149static void hostap_set_tim(local_info_t *local, int aid, int set)
 150{
 151        if (local->func->set_tim)
 152                local->func->set_tim(local->dev, aid, set);
 153}
 154
 155
 156static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
 157{
 158        union iwreq_data wrqu;
 159        memset(&wrqu, 0, sizeof(wrqu));
 160        memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
 161        wrqu.addr.sa_family = ARPHRD_ETHER;
 162        wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
 163}
 164
 165
 166static void hostap_event_expired_sta(struct net_device *dev,
 167                                     struct sta_info *sta)
 168{
 169        union iwreq_data wrqu;
 170        memset(&wrqu, 0, sizeof(wrqu));
 171        memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
 172        wrqu.addr.sa_family = ARPHRD_ETHER;
 173        wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
 174}
 175
 176
 177#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 178
 179static void ap_handle_timer(unsigned long data)
 180{
 181        struct sta_info *sta = (struct sta_info *) data;
 182        local_info_t *local;
 183        struct ap_data *ap;
 184        unsigned long next_time = 0;
 185        int was_assoc;
 186
 187        if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
 188                PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
 189                return;
 190        }
 191
 192        local = sta->local;
 193        ap = local->ap;
 194        was_assoc = sta->flags & WLAN_STA_ASSOC;
 195
 196        if (atomic_read(&sta->users) != 0)
 197                next_time = jiffies + HZ;
 198        else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
 199                next_time = jiffies + ap->max_inactivity;
 200
 201        if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
 202                /* station activity detected; reset timeout state */
 203                sta->timeout_next = STA_NULLFUNC;
 204                next_time = sta->last_rx + ap->max_inactivity;
 205        } else if (sta->timeout_next == STA_DISASSOC &&
 206                   !(sta->flags & WLAN_STA_PENDING_POLL)) {
 207                /* STA ACKed data nullfunc frame poll */
 208                sta->timeout_next = STA_NULLFUNC;
 209                next_time = jiffies + ap->max_inactivity;
 210        }
 211
 212        if (next_time) {
 213                sta->timer.expires = next_time;
 214                add_timer(&sta->timer);
 215                return;
 216        }
 217
 218        if (sta->ap)
 219                sta->timeout_next = STA_DEAUTH;
 220
 221        if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
 222                spin_lock(&ap->sta_table_lock);
 223                ap_sta_hash_del(ap, sta);
 224                list_del(&sta->list);
 225                spin_unlock(&ap->sta_table_lock);
 226                sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
 227        } else if (sta->timeout_next == STA_DISASSOC)
 228                sta->flags &= ~WLAN_STA_ASSOC;
 229
 230        if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
 231                hostap_event_expired_sta(local->dev, sta);
 232
 233        if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
 234            !skb_queue_empty(&sta->tx_buf)) {
 235                hostap_set_tim(local, sta->aid, 0);
 236                sta->flags &= ~WLAN_STA_TIM;
 237        }
 238
 239        if (sta->ap) {
 240                if (ap->autom_ap_wds) {
 241                        PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
 242                               "connection to AP %pM\n",
 243                               local->dev->name, sta->addr);
 244                        hostap_wds_link_oper(local, sta->addr, WDS_DEL);
 245                }
 246        } else if (sta->timeout_next == STA_NULLFUNC) {
 247                /* send data frame to poll STA and check whether this frame
 248                 * is ACKed */
 249                /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
 250                 * it is apparently not retried so TX Exc events are not
 251                 * received for it */
 252                sta->flags |= WLAN_STA_PENDING_POLL;
 253                prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
 254                                 IEEE80211_STYPE_DATA, NULL, 0,
 255                                 sta->addr, ap->tx_callback_poll);
 256        } else {
 257                int deauth = sta->timeout_next == STA_DEAUTH;
 258                __le16 resp;
 259                PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM"
 260                       "(last=%lu, jiffies=%lu)\n",
 261                       local->dev->name,
 262                       deauth ? "deauthentication" : "disassociation",
 263                       sta->addr, sta->last_rx, jiffies);
 264
 265                resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
 266                                   WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
 267                prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
 268                                 (deauth ? IEEE80211_STYPE_DEAUTH :
 269                                  IEEE80211_STYPE_DISASSOC),
 270                                 (char *) &resp, 2, sta->addr, 0);
 271        }
 272
 273        if (sta->timeout_next == STA_DEAUTH) {
 274                if (sta->flags & WLAN_STA_PERM) {
 275                        PDEBUG(DEBUG_AP, "%s: STA %pM"
 276                               " would have been removed, "
 277                               "but it has 'perm' flag\n",
 278                               local->dev->name, sta->addr);
 279                } else
 280                        ap_free_sta(ap, sta);
 281                return;
 282        }
 283
 284        if (sta->timeout_next == STA_NULLFUNC) {
 285                sta->timeout_next = STA_DISASSOC;
 286                sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
 287        } else {
 288                sta->timeout_next = STA_DEAUTH;
 289                sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
 290        }
 291
 292        add_timer(&sta->timer);
 293}
 294
 295
 296void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
 297                            int resend)
 298{
 299        u8 addr[ETH_ALEN];
 300        __le16 resp;
 301        int i;
 302
 303        PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
 304        memset(addr, 0xff, ETH_ALEN);
 305
 306        resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
 307
 308        /* deauth message sent; try to resend it few times; the message is
 309         * broadcast, so it may be delayed until next DTIM; there is not much
 310         * else we can do at this point since the driver is going to be shut
 311         * down */
 312        for (i = 0; i < 5; i++) {
 313                prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
 314                                 IEEE80211_STYPE_DEAUTH,
 315                                 (char *) &resp, 2, addr, 0);
 316
 317                if (!resend || ap->num_sta <= 0)
 318                        return;
 319
 320                mdelay(50);
 321        }
 322}
 323
 324
 325static int ap_control_proc_read(char *page, char **start, off_t off,
 326                                int count, int *eof, void *data)
 327{
 328        char *p = page;
 329        struct ap_data *ap = (struct ap_data *) data;
 330        char *policy_txt;
 331        struct mac_entry *entry;
 332
 333        if (off != 0) {
 334                *eof = 1;
 335                return 0;
 336        }
 337
 338        switch (ap->mac_restrictions.policy) {
 339        case MAC_POLICY_OPEN:
 340                policy_txt = "open";
 341                break;
 342        case MAC_POLICY_ALLOW:
 343                policy_txt = "allow";
 344                break;
 345        case MAC_POLICY_DENY:
 346                policy_txt = "deny";
 347                break;
 348        default:
 349                policy_txt = "unknown";
 350                break;
 351        };
 352        p += sprintf(p, "MAC policy: %s\n", policy_txt);
 353        p += sprintf(p, "MAC entries: %u\n", ap->mac_restrictions.entries);
 354        p += sprintf(p, "MAC list:\n");
 355        spin_lock_bh(&ap->mac_restrictions.lock);
 356        list_for_each_entry(entry, &ap->mac_restrictions.mac_list, list) {
 357                if (p - page > PAGE_SIZE - 80) {
 358                        p += sprintf(p, "All entries did not fit one page.\n");
 359                        break;
 360                }
 361
 362                p += sprintf(p, "%pM\n", entry->addr);
 363        }
 364        spin_unlock_bh(&ap->mac_restrictions.lock);
 365
 366        return (p - page);
 367}
 368
 369
 370int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
 371{
 372        struct mac_entry *entry;
 373
 374        entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
 375        if (entry == NULL)
 376                return -1;
 377
 378        memcpy(entry->addr, mac, ETH_ALEN);
 379
 380        spin_lock_bh(&mac_restrictions->lock);
 381        list_add_tail(&entry->list, &mac_restrictions->mac_list);
 382        mac_restrictions->entries++;
 383        spin_unlock_bh(&mac_restrictions->lock);
 384
 385        return 0;
 386}
 387
 388
 389int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
 390{
 391        struct list_head *ptr;
 392        struct mac_entry *entry;
 393
 394        spin_lock_bh(&mac_restrictions->lock);
 395        for (ptr = mac_restrictions->mac_list.next;
 396             ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
 397                entry = list_entry(ptr, struct mac_entry, list);
 398
 399                if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
 400                        list_del(ptr);
 401                        kfree(entry);
 402                        mac_restrictions->entries--;
 403                        spin_unlock_bh(&mac_restrictions->lock);
 404                        return 0;
 405                }
 406        }
 407        spin_unlock_bh(&mac_restrictions->lock);
 408        return -1;
 409}
 410
 411
 412static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
 413                               u8 *mac)
 414{
 415        struct mac_entry *entry;
 416        int found = 0;
 417
 418        if (mac_restrictions->policy == MAC_POLICY_OPEN)
 419                return 0;
 420
 421        spin_lock_bh(&mac_restrictions->lock);
 422        list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
 423                if (memcmp(entry->addr, mac, ETH_ALEN) == 0) {
 424                        found = 1;
 425                        break;
 426                }
 427        }
 428        spin_unlock_bh(&mac_restrictions->lock);
 429
 430        if (mac_restrictions->policy == MAC_POLICY_ALLOW)
 431                return !found;
 432        else
 433                return found;
 434}
 435
 436
 437void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
 438{
 439        struct list_head *ptr, *n;
 440        struct mac_entry *entry;
 441
 442        if (mac_restrictions->entries == 0)
 443                return;
 444
 445        spin_lock_bh(&mac_restrictions->lock);
 446        for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
 447             ptr != &mac_restrictions->mac_list;
 448             ptr = n, n = ptr->next) {
 449                entry = list_entry(ptr, struct mac_entry, list);
 450                list_del(ptr);
 451                kfree(entry);
 452        }
 453        mac_restrictions->entries = 0;
 454        spin_unlock_bh(&mac_restrictions->lock);
 455}
 456
 457
 458int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
 459{
 460        struct sta_info *sta;
 461        __le16 resp;
 462
 463        spin_lock_bh(&ap->sta_table_lock);
 464        sta = ap_get_sta(ap, mac);
 465        if (sta) {
 466                ap_sta_hash_del(ap, sta);
 467                list_del(&sta->list);
 468        }
 469        spin_unlock_bh(&ap->sta_table_lock);
 470
 471        if (!sta)
 472                return -EINVAL;
 473
 474        resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
 475        prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
 476                         (char *) &resp, 2, sta->addr, 0);
 477
 478        if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
 479                hostap_event_expired_sta(dev, sta);
 480
 481        ap_free_sta(ap, sta);
 482
 483        return 0;
 484}
 485
 486#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 487
 488
 489void ap_control_kickall(struct ap_data *ap)
 490{
 491        struct list_head *ptr, *n;
 492        struct sta_info *sta;
 493
 494        spin_lock_bh(&ap->sta_table_lock);
 495        for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
 496             ptr = n, n = ptr->next) {
 497                sta = list_entry(ptr, struct sta_info, list);
 498                ap_sta_hash_del(ap, sta);
 499                list_del(&sta->list);
 500                if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
 501                        hostap_event_expired_sta(sta->local->dev, sta);
 502                ap_free_sta(ap, sta);
 503        }
 504        spin_unlock_bh(&ap->sta_table_lock);
 505}
 506
 507
 508#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 509
 510#define PROC_LIMIT (PAGE_SIZE - 80)
 511
 512static int prism2_ap_proc_read(char *page, char **start, off_t off,
 513                               int count, int *eof, void *data)
 514{
 515        char *p = page;
 516        struct ap_data *ap = (struct ap_data *) data;
 517        struct sta_info *sta;
 518        int i;
 519
 520        if (off > PROC_LIMIT) {
 521                *eof = 1;
 522                return 0;
 523        }
 524
 525        p += sprintf(p, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
 526        spin_lock_bh(&ap->sta_table_lock);
 527        list_for_each_entry(sta, &ap->sta_list, list) {
 528                if (!sta->ap)
 529                        continue;
 530
 531                p += sprintf(p, "%pM %d %d %d %d '",
 532                             sta->addr,
 533                             sta->u.ap.channel, sta->last_rx_signal,
 534                             sta->last_rx_silence, sta->last_rx_rate);
 535                for (i = 0; i < sta->u.ap.ssid_len; i++)
 536                        p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
 537                                          sta->u.ap.ssid[i] < 127) ?
 538                                         "%c" : "<%02x>"),
 539                                     sta->u.ap.ssid[i]);
 540                p += sprintf(p, "'");
 541                if (sta->capability & WLAN_CAPABILITY_ESS)
 542                        p += sprintf(p, " [ESS]");
 543                if (sta->capability & WLAN_CAPABILITY_IBSS)
 544                        p += sprintf(p, " [IBSS]");
 545                if (sta->capability & WLAN_CAPABILITY_PRIVACY)
 546                        p += sprintf(p, " [WEP]");
 547                p += sprintf(p, "\n");
 548
 549                if ((p - page) > PROC_LIMIT) {
 550                        printk(KERN_DEBUG "hostap: ap proc did not fit\n");
 551                        break;
 552                }
 553        }
 554        spin_unlock_bh(&ap->sta_table_lock);
 555
 556        if ((p - page) <= off) {
 557                *eof = 1;
 558                return 0;
 559        }
 560
 561        *start = page + off;
 562
 563        return (p - page - off);
 564}
 565#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 566
 567
 568void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
 569{
 570        if (!ap)
 571                return;
 572
 573        if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
 574                PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
 575                       "firmware upgrade recommended\n");
 576                ap->nullfunc_ack = 1;
 577        } else
 578                ap->nullfunc_ack = 0;
 579
 580        if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
 581                printk(KERN_WARNING "%s: Warning: secondary station firmware "
 582                       "version 1.4.2 does not seem to work in Host AP mode\n",
 583                       ap->local->dev->name);
 584        }
 585}
 586
 587
 588/* Called only as a tasklet (software IRQ) */
 589static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
 590{
 591        struct ap_data *ap = data;
 592        struct ieee80211_hdr *hdr;
 593
 594        if (!ap->local->hostapd || !ap->local->apdev) {
 595                dev_kfree_skb(skb);
 596                return;
 597        }
 598
 599        /* Pass the TX callback frame to the hostapd; use 802.11 header version
 600         * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
 601
 602        hdr = (struct ieee80211_hdr *) skb->data;
 603        hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS);
 604        hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0));
 605
 606        skb->dev = ap->local->apdev;
 607        skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control));
 608        skb->pkt_type = PACKET_OTHERHOST;
 609        skb->protocol = cpu_to_be16(ETH_P_802_2);
 610        memset(skb->cb, 0, sizeof(skb->cb));
 611        netif_rx(skb);
 612}
 613
 614
 615#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 616/* Called only as a tasklet (software IRQ) */
 617static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
 618{
 619        struct ap_data *ap = data;
 620        struct net_device *dev = ap->local->dev;
 621        struct ieee80211_hdr *hdr;
 622        u16 auth_alg, auth_transaction, status;
 623        __le16 *pos;
 624        struct sta_info *sta = NULL;
 625        char *txt = NULL;
 626
 627        if (ap->local->hostapd) {
 628                dev_kfree_skb(skb);
 629                return;
 630        }
 631
 632        hdr = (struct ieee80211_hdr *) skb->data;
 633        if (!ieee80211_is_auth(hdr->frame_control) ||
 634            skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
 635                printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
 636                       "frame\n", dev->name);
 637                dev_kfree_skb(skb);
 638                return;
 639        }
 640
 641        pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
 642        auth_alg = le16_to_cpu(*pos++);
 643        auth_transaction = le16_to_cpu(*pos++);
 644        status = le16_to_cpu(*pos++);
 645
 646        if (!ok) {
 647                txt = "frame was not ACKed";
 648                goto done;
 649        }
 650
 651        spin_lock(&ap->sta_table_lock);
 652        sta = ap_get_sta(ap, hdr->addr1);
 653        if (sta)
 654                atomic_inc(&sta->users);
 655        spin_unlock(&ap->sta_table_lock);
 656
 657        if (!sta) {
 658                txt = "STA not found";
 659                goto done;
 660        }
 661
 662        if (status == WLAN_STATUS_SUCCESS &&
 663            ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
 664             (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
 665                txt = "STA authenticated";
 666                sta->flags |= WLAN_STA_AUTH;
 667                sta->last_auth = jiffies;
 668        } else if (status != WLAN_STATUS_SUCCESS)
 669                txt = "authentication failed";
 670
 671 done:
 672        if (sta)
 673                atomic_dec(&sta->users);
 674        if (txt) {
 675                PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d "
 676                       "trans#=%d status=%d - %s\n",
 677                       dev->name, hdr->addr1,
 678                       auth_alg, auth_transaction, status, txt);
 679        }
 680        dev_kfree_skb(skb);
 681}
 682
 683
 684/* Called only as a tasklet (software IRQ) */
 685static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
 686{
 687        struct ap_data *ap = data;
 688        struct net_device *dev = ap->local->dev;
 689        struct ieee80211_hdr *hdr;
 690        u16 fc, status;
 691        __le16 *pos;
 692        struct sta_info *sta = NULL;
 693        char *txt = NULL;
 694
 695        if (ap->local->hostapd) {
 696                dev_kfree_skb(skb);
 697                return;
 698        }
 699
 700        hdr = (struct ieee80211_hdr *) skb->data;
 701        fc = le16_to_cpu(hdr->frame_control);
 702        if ((!ieee80211_is_assoc_resp(hdr->frame_control) &&
 703             !ieee80211_is_reassoc_resp(hdr->frame_control)) ||
 704            skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
 705                printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
 706                       "frame\n", dev->name);
 707                dev_kfree_skb(skb);
 708                return;
 709        }
 710
 711        if (!ok) {
 712                txt = "frame was not ACKed";
 713                goto done;
 714        }
 715
 716        spin_lock(&ap->sta_table_lock);
 717        sta = ap_get_sta(ap, hdr->addr1);
 718        if (sta)
 719                atomic_inc(&sta->users);
 720        spin_unlock(&ap->sta_table_lock);
 721
 722        if (!sta) {
 723                txt = "STA not found";
 724                goto done;
 725        }
 726
 727        pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
 728        pos++;
 729        status = le16_to_cpu(*pos++);
 730        if (status == WLAN_STATUS_SUCCESS) {
 731                if (!(sta->flags & WLAN_STA_ASSOC))
 732                        hostap_event_new_sta(dev, sta);
 733                txt = "STA associated";
 734                sta->flags |= WLAN_STA_ASSOC;
 735                sta->last_assoc = jiffies;
 736        } else
 737                txt = "association failed";
 738
 739 done:
 740        if (sta)
 741                atomic_dec(&sta->users);
 742        if (txt) {
 743                PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n",
 744                       dev->name, hdr->addr1, txt);
 745        }
 746        dev_kfree_skb(skb);
 747}
 748
 749/* Called only as a tasklet (software IRQ); TX callback for poll frames used
 750 * in verifying whether the STA is still present. */
 751static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
 752{
 753        struct ap_data *ap = data;
 754        struct ieee80211_hdr *hdr;
 755        struct sta_info *sta;
 756
 757        if (skb->len < 24)
 758                goto fail;
 759        hdr = (struct ieee80211_hdr *) skb->data;
 760        if (ok) {
 761                spin_lock(&ap->sta_table_lock);
 762                sta = ap_get_sta(ap, hdr->addr1);
 763                if (sta)
 764                        sta->flags &= ~WLAN_STA_PENDING_POLL;
 765                spin_unlock(&ap->sta_table_lock);
 766        } else {
 767                PDEBUG(DEBUG_AP,
 768                       "%s: STA %pM did not ACK activity poll frame\n",
 769                       ap->local->dev->name, hdr->addr1);
 770        }
 771
 772 fail:
 773        dev_kfree_skb(skb);
 774}
 775#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 776
 777
 778void hostap_init_data(local_info_t *local)
 779{
 780        struct ap_data *ap = local->ap;
 781
 782        if (ap == NULL) {
 783                printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
 784                return;
 785        }
 786        memset(ap, 0, sizeof(struct ap_data));
 787        ap->local = local;
 788
 789        ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
 790        ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
 791        ap->max_inactivity =
 792                GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
 793        ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
 794
 795        spin_lock_init(&ap->sta_table_lock);
 796        INIT_LIST_HEAD(&ap->sta_list);
 797
 798        /* Initialize task queue structure for AP management */
 799        INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
 800
 801        ap->tx_callback_idx =
 802                hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
 803        if (ap->tx_callback_idx == 0)
 804                printk(KERN_WARNING "%s: failed to register TX callback for "
 805                       "AP\n", local->dev->name);
 806#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 807        INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
 808
 809        ap->tx_callback_auth =
 810                hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
 811        ap->tx_callback_assoc =
 812                hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
 813        ap->tx_callback_poll =
 814                hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
 815        if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
 816                ap->tx_callback_poll == 0)
 817                printk(KERN_WARNING "%s: failed to register TX callback for "
 818                       "AP\n", local->dev->name);
 819
 820        spin_lock_init(&ap->mac_restrictions.lock);
 821        INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
 822#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 823
 824        ap->initialized = 1;
 825}
 826
 827
 828void hostap_init_ap_proc(local_info_t *local)
 829{
 830        struct ap_data *ap = local->ap;
 831
 832        ap->proc = local->proc;
 833        if (ap->proc == NULL)
 834                return;
 835
 836#ifndef PRISM2_NO_PROCFS_DEBUG
 837        create_proc_read_entry("ap_debug", 0, ap->proc,
 838                               ap_debug_proc_read, ap);
 839#endif /* PRISM2_NO_PROCFS_DEBUG */
 840
 841#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 842        create_proc_read_entry("ap_control", 0, ap->proc,
 843                               ap_control_proc_read, ap);
 844        create_proc_read_entry("ap", 0, ap->proc,
 845                               prism2_ap_proc_read, ap);
 846#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 847
 848}
 849
 850
 851void hostap_free_data(struct ap_data *ap)
 852{
 853        struct sta_info *n, *sta;
 854
 855        if (ap == NULL || !ap->initialized) {
 856                printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
 857                       "initialized - skip resource freeing\n");
 858                return;
 859        }
 860
 861#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 862        if (ap->crypt)
 863                ap->crypt->deinit(ap->crypt_priv);
 864        ap->crypt = ap->crypt_priv = NULL;
 865#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 866
 867        list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
 868                ap_sta_hash_del(ap, sta);
 869                list_del(&sta->list);
 870                if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
 871                        hostap_event_expired_sta(sta->local->dev, sta);
 872                ap_free_sta(ap, sta);
 873        }
 874
 875#ifndef PRISM2_NO_PROCFS_DEBUG
 876        if (ap->proc != NULL) {
 877                remove_proc_entry("ap_debug", ap->proc);
 878        }
 879#endif /* PRISM2_NO_PROCFS_DEBUG */
 880
 881#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 882        if (ap->proc != NULL) {
 883          remove_proc_entry("ap", ap->proc);
 884                remove_proc_entry("ap_control", ap->proc);
 885        }
 886        ap_control_flush_macs(&ap->mac_restrictions);
 887#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 888
 889        ap->initialized = 0;
 890}
 891
 892
 893/* caller should have mutex for AP STA list handling */
 894static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
 895{
 896        struct sta_info *s;
 897
 898        s = ap->sta_hash[STA_HASH(sta)];
 899        while (s != NULL && memcmp(s->addr, sta, ETH_ALEN) != 0)
 900                s = s->hnext;
 901        return s;
 902}
 903
 904
 905#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
 906
 907/* Called from timer handler and from scheduled AP queue handlers */
 908static void prism2_send_mgmt(struct net_device *dev,
 909                             u16 type_subtype, char *body,
 910                             int body_len, u8 *addr, u16 tx_cb_idx)
 911{
 912        struct hostap_interface *iface;
 913        local_info_t *local;
 914        struct ieee80211_hdr *hdr;
 915        u16 fc;
 916        struct sk_buff *skb;
 917        struct hostap_skb_tx_data *meta;
 918        int hdrlen;
 919
 920        iface = netdev_priv(dev);
 921        local = iface->local;
 922        dev = local->dev; /* always use master radio device */
 923        iface = netdev_priv(dev);
 924
 925        if (!(dev->flags & IFF_UP)) {
 926                PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
 927                       "cannot send frame\n", dev->name);
 928                return;
 929        }
 930
 931        skb = dev_alloc_skb(sizeof(*hdr) + body_len);
 932        if (skb == NULL) {
 933                PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
 934                       "skb\n", dev->name);
 935                return;
 936        }
 937
 938        fc = type_subtype;
 939        hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
 940        hdr = (struct ieee80211_hdr *) skb_put(skb, hdrlen);
 941        if (body)
 942                memcpy(skb_put(skb, body_len), body, body_len);
 943
 944        memset(hdr, 0, hdrlen);
 945
 946        /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
 947         * tx_control instead of using local->tx_control */
 948
 949
 950        memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
 951        if (ieee80211_is_data(hdr->frame_control)) {
 952                fc |= IEEE80211_FCTL_FROMDS;
 953                memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
 954                memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
 955        } else if (ieee80211_is_ctl(hdr->frame_control)) {
 956                /* control:ACK does not have addr2 or addr3 */
 957                memset(hdr->addr2, 0, ETH_ALEN);
 958                memset(hdr->addr3, 0, ETH_ALEN);
 959        } else {
 960                memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
 961                memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
 962        }
 963
 964        hdr->frame_control = cpu_to_le16(fc);
 965
 966        meta = (struct hostap_skb_tx_data *) skb->cb;
 967        memset(meta, 0, sizeof(*meta));
 968        meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
 969        meta->iface = iface;
 970        meta->tx_cb_idx = tx_cb_idx;
 971
 972        skb->dev = dev;
 973        skb_reset_mac_header(skb);
 974        skb_reset_network_header(skb);
 975        dev_queue_xmit(skb);
 976}
 977#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
 978
 979
 980static int prism2_sta_proc_read(char *page, char **start, off_t off,
 981                                int count, int *eof, void *data)
 982{
 983        char *p = page;
 984        struct sta_info *sta = (struct sta_info *) data;
 985        int i;
 986
 987        /* FIX: possible race condition.. the STA data could have just expired,
 988         * but proc entry was still here so that the read could have started;
 989         * some locking should be done here.. */
 990
 991        if (off != 0) {
 992                *eof = 1;
 993                return 0;
 994        }
 995
 996        p += sprintf(p, "%s=%pM\nusers=%d\naid=%d\n"
 997                     "flags=0x%04x%s%s%s%s%s%s%s\n"
 998                     "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
 999                     sta->ap ? "AP" : "STA",
1000                     sta->addr, atomic_read(&sta->users), sta->aid,
1001                     sta->flags,
1002                     sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1003                     sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1004                     sta->flags & WLAN_STA_PS ? " PS" : "",
1005                     sta->flags & WLAN_STA_TIM ? " TIM" : "",
1006                     sta->flags & WLAN_STA_PERM ? " PERM" : "",
1007                     sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1008                     sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1009                     sta->capability, sta->listen_interval);
1010        /* supported_rates: 500 kbit/s units with msb ignored */
1011        for (i = 0; i < sizeof(sta->supported_rates); i++)
1012                if (sta->supported_rates[i] != 0)
1013                        p += sprintf(p, "%d%sMbps ",
1014                                     (sta->supported_rates[i] & 0x7f) / 2,
1015                                     sta->supported_rates[i] & 1 ? ".5" : "");
1016        p += sprintf(p, "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1017                     "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1018                     "tx_packets=%lu\n"
1019                     "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1020                     "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1021                     "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1022                     "tx[11M]=%d\n"
1023                     "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1024                     jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1025                     sta->last_tx,
1026                     sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1027                     sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1028                     sta->last_rx_silence,
1029                     sta->last_rx_signal, sta->last_rx_rate / 10,
1030                     sta->last_rx_rate % 10 ? ".5" : "",
1031                     sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1032                     sta->tx_count[2], sta->tx_count[3],  sta->rx_count[0],
1033                     sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1034        if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1035                p = sta->crypt->ops->print_stats(p, sta->crypt->priv);
1036#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1037        if (sta->ap) {
1038                if (sta->u.ap.channel >= 0)
1039                        p += sprintf(p, "channel=%d\n", sta->u.ap.channel);
1040                p += sprintf(p, "ssid=");
1041                for (i = 0; i < sta->u.ap.ssid_len; i++)
1042                        p += sprintf(p, ((sta->u.ap.ssid[i] >= 32 &&
1043                                          sta->u.ap.ssid[i] < 127) ?
1044                                         "%c" : "<%02x>"),
1045                                     sta->u.ap.ssid[i]);
1046                p += sprintf(p, "\n");
1047        }
1048#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1049
1050        return (p - page);
1051}
1052
1053
1054static void handle_add_proc_queue(struct work_struct *work)
1055{
1056        struct ap_data *ap = container_of(work, struct ap_data,
1057                                          add_sta_proc_queue);
1058        struct sta_info *sta;
1059        char name[20];
1060        struct add_sta_proc_data *entry, *prev;
1061
1062        entry = ap->add_sta_proc_entries;
1063        ap->add_sta_proc_entries = NULL;
1064
1065        while (entry) {
1066                spin_lock_bh(&ap->sta_table_lock);
1067                sta = ap_get_sta(ap, entry->addr);
1068                if (sta)
1069                        atomic_inc(&sta->users);
1070                spin_unlock_bh(&ap->sta_table_lock);
1071
1072                if (sta) {
1073                        sprintf(name, "%pM", sta->addr);
1074                        sta->proc = create_proc_read_entry(
1075                                name, 0, ap->proc,
1076                                prism2_sta_proc_read, sta);
1077
1078                        atomic_dec(&sta->users);
1079                }
1080
1081                prev = entry;
1082                entry = entry->next;
1083                kfree(prev);
1084        }
1085}
1086
1087
1088static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1089{
1090        struct sta_info *sta;
1091
1092        sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1093        if (sta == NULL) {
1094                PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1095                return NULL;
1096        }
1097
1098        /* initialize STA info data */
1099        sta->local = ap->local;
1100        skb_queue_head_init(&sta->tx_buf);
1101        memcpy(sta->addr, addr, ETH_ALEN);
1102
1103        atomic_inc(&sta->users);
1104        spin_lock_bh(&ap->sta_table_lock);
1105        list_add(&sta->list, &ap->sta_list);
1106        ap->num_sta++;
1107        ap_sta_hash_add(ap, sta);
1108        spin_unlock_bh(&ap->sta_table_lock);
1109
1110        if (ap->proc) {
1111                struct add_sta_proc_data *entry;
1112                /* schedule a non-interrupt context process to add a procfs
1113                 * entry for the STA since procfs code use GFP_KERNEL */
1114                entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1115                if (entry) {
1116                        memcpy(entry->addr, sta->addr, ETH_ALEN);
1117                        entry->next = ap->add_sta_proc_entries;
1118                        ap->add_sta_proc_entries = entry;
1119                        schedule_work(&ap->add_sta_proc_queue);
1120                } else
1121                        printk(KERN_DEBUG "Failed to add STA proc data\n");
1122        }
1123
1124#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1125        init_timer(&sta->timer);
1126        sta->timer.expires = jiffies + ap->max_inactivity;
1127        sta->timer.data = (unsigned long) sta;
1128        sta->timer.function = ap_handle_timer;
1129        if (!ap->local->hostapd)
1130                add_timer(&sta->timer);
1131#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1132
1133        return sta;
1134}
1135
1136
1137static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1138                         local_info_t *local)
1139{
1140        if (rateidx > sta->tx_max_rate ||
1141            !(sta->tx_supp_rates & (1 << rateidx)))
1142                return 0;
1143
1144        if (local->tx_rate_control != 0 &&
1145            !(local->tx_rate_control & (1 << rateidx)))
1146                return 0;
1147
1148        return 1;
1149}
1150
1151
1152static void prism2_check_tx_rates(struct sta_info *sta)
1153{
1154        int i;
1155
1156        sta->tx_supp_rates = 0;
1157        for (i = 0; i < sizeof(sta->supported_rates); i++) {
1158                if ((sta->supported_rates[i] & 0x7f) == 2)
1159                        sta->tx_supp_rates |= WLAN_RATE_1M;
1160                if ((sta->supported_rates[i] & 0x7f) == 4)
1161                        sta->tx_supp_rates |= WLAN_RATE_2M;
1162                if ((sta->supported_rates[i] & 0x7f) == 11)
1163                        sta->tx_supp_rates |= WLAN_RATE_5M5;
1164                if ((sta->supported_rates[i] & 0x7f) == 22)
1165                        sta->tx_supp_rates |= WLAN_RATE_11M;
1166        }
1167        sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1168        if (sta->tx_supp_rates & WLAN_RATE_1M) {
1169                sta->tx_max_rate = 0;
1170                if (ap_tx_rate_ok(0, sta, sta->local)) {
1171                        sta->tx_rate = 10;
1172                        sta->tx_rate_idx = 0;
1173                }
1174        }
1175        if (sta->tx_supp_rates & WLAN_RATE_2M) {
1176                sta->tx_max_rate = 1;
1177                if (ap_tx_rate_ok(1, sta, sta->local)) {
1178                        sta->tx_rate = 20;
1179                        sta->tx_rate_idx = 1;
1180                }
1181        }
1182        if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1183                sta->tx_max_rate = 2;
1184                if (ap_tx_rate_ok(2, sta, sta->local)) {
1185                        sta->tx_rate = 55;
1186                        sta->tx_rate_idx = 2;
1187                }
1188        }
1189        if (sta->tx_supp_rates & WLAN_RATE_11M) {
1190                sta->tx_max_rate = 3;
1191                if (ap_tx_rate_ok(3, sta, sta->local)) {
1192                        sta->tx_rate = 110;
1193                        sta->tx_rate_idx = 3;
1194                }
1195        }
1196}
1197
1198
1199#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1200
1201static void ap_crypt_init(struct ap_data *ap)
1202{
1203        ap->crypt = lib80211_get_crypto_ops("WEP");
1204
1205        if (ap->crypt) {
1206                if (ap->crypt->init) {
1207                        ap->crypt_priv = ap->crypt->init(0);
1208                        if (ap->crypt_priv == NULL)
1209                                ap->crypt = NULL;
1210                        else {
1211                                u8 key[WEP_KEY_LEN];
1212                                get_random_bytes(key, WEP_KEY_LEN);
1213                                ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1214                                                   ap->crypt_priv);
1215                        }
1216                }
1217        }
1218
1219        if (ap->crypt == NULL) {
1220                printk(KERN_WARNING "AP could not initialize WEP: load module "
1221                       "lib80211_crypt_wep.ko\n");
1222        }
1223}
1224
1225
1226/* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1227 * that WEP algorithm is used for generating challange. This should be unique,
1228 * but otherwise there is not really need for randomness etc. Initialize WEP
1229 * with pseudo random key and then use increasing IV to get unique challenge
1230 * streams.
1231 *
1232 * Called only as a scheduled task for pending AP frames.
1233 */
1234static char * ap_auth_make_challenge(struct ap_data *ap)
1235{
1236        char *tmpbuf;
1237        struct sk_buff *skb;
1238
1239        if (ap->crypt == NULL) {
1240                ap_crypt_init(ap);
1241                if (ap->crypt == NULL)
1242                        return NULL;
1243        }
1244
1245        tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1246        if (tmpbuf == NULL) {
1247                PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1248                return NULL;
1249        }
1250
1251        skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1252                            ap->crypt->extra_mpdu_prefix_len +
1253                            ap->crypt->extra_mpdu_postfix_len);
1254        if (skb == NULL) {
1255                kfree(tmpbuf);
1256                return NULL;
1257        }
1258
1259        skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1260        memset(skb_put(skb, WLAN_AUTH_CHALLENGE_LEN), 0,
1261               WLAN_AUTH_CHALLENGE_LEN);
1262        if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1263                dev_kfree_skb(skb);
1264                kfree(tmpbuf);
1265                return NULL;
1266        }
1267
1268        skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1269                                         tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
1270        dev_kfree_skb(skb);
1271
1272        return tmpbuf;
1273}
1274
1275
1276/* Called only as a scheduled task for pending AP frames. */
1277static void handle_authen(local_info_t *local, struct sk_buff *skb,
1278                          struct hostap_80211_rx_status *rx_stats)
1279{
1280        struct net_device *dev = local->dev;
1281        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1282        size_t hdrlen;
1283        struct ap_data *ap = local->ap;
1284        char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1285        int len, olen;
1286        u16 auth_alg, auth_transaction, status_code;
1287        __le16 *pos;
1288        u16 resp = WLAN_STATUS_SUCCESS;
1289        struct sta_info *sta = NULL;
1290        struct lib80211_crypt_data *crypt;
1291        char *txt = "";
1292
1293        len = skb->len - IEEE80211_MGMT_HDR_LEN;
1294
1295        hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
1296
1297        if (len < 6) {
1298                PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1299                       "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
1300                return;
1301        }
1302
1303        spin_lock_bh(&local->ap->sta_table_lock);
1304        sta = ap_get_sta(local->ap, hdr->addr2);
1305        if (sta)
1306                atomic_inc(&sta->users);
1307        spin_unlock_bh(&local->ap->sta_table_lock);
1308
1309        if (sta && sta->crypt)
1310                crypt = sta->crypt;
1311        else {
1312                int idx = 0;
1313                if (skb->len >= hdrlen + 3)
1314                        idx = skb->data[hdrlen + 3] >> 6;
1315                crypt = local->crypt_info.crypt[idx];
1316        }
1317
1318        pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1319        auth_alg = __le16_to_cpu(*pos);
1320        pos++;
1321        auth_transaction = __le16_to_cpu(*pos);
1322        pos++;
1323        status_code = __le16_to_cpu(*pos);
1324        pos++;
1325
1326        if (memcmp(dev->dev_addr, hdr->addr2, ETH_ALEN) == 0 ||
1327            ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1328                txt = "authentication denied";
1329                resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1330                goto fail;
1331        }
1332
1333        if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1334             auth_alg == WLAN_AUTH_OPEN) ||
1335            ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1336             crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1337        } else {
1338                txt = "unsupported algorithm";
1339                resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1340                goto fail;
1341        }
1342
1343        if (len >= 8) {
1344                u8 *u = (u8 *) pos;
1345                if (*u == WLAN_EID_CHALLENGE) {
1346                        if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1347                                txt = "invalid challenge len";
1348                                resp = WLAN_STATUS_CHALLENGE_FAIL;
1349                                goto fail;
1350                        }
1351                        if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1352                                txt = "challenge underflow";
1353                                resp = WLAN_STATUS_CHALLENGE_FAIL;
1354                                goto fail;
1355                        }
1356                        challenge = (char *) (u + 2);
1357                }
1358        }
1359
1360        if (sta && sta->ap) {
1361                if (time_after(jiffies, sta->u.ap.last_beacon +
1362                               (10 * sta->listen_interval * HZ) / 1024)) {
1363                        PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1364                               " assuming AP %pM is now STA\n",
1365                               dev->name, sta->addr);
1366                        sta->ap = 0;
1367                        sta->flags = 0;
1368                        sta->u.sta.challenge = NULL;
1369                } else {
1370                        txt = "AP trying to authenticate?";
1371                        resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1372                        goto fail;
1373                }
1374        }
1375
1376        if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1377            (auth_alg == WLAN_AUTH_SHARED_KEY &&
1378             (auth_transaction == 1 ||
1379              (auth_transaction == 3 && sta != NULL &&
1380               sta->u.sta.challenge != NULL)))) {
1381        } else {
1382                txt = "unknown authentication transaction number";
1383                resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1384                goto fail;
1385        }
1386
1387        if (sta == NULL) {
1388                txt = "new STA";
1389
1390                if (local->ap->num_sta >= MAX_STA_COUNT) {
1391                        /* FIX: might try to remove some old STAs first? */
1392                        txt = "no more room for new STAs";
1393                        resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1394                        goto fail;
1395                }
1396
1397                sta = ap_add_sta(local->ap, hdr->addr2);
1398                if (sta == NULL) {
1399                        txt = "ap_add_sta failed";
1400                        resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1401                        goto fail;
1402                }
1403        }
1404
1405        switch (auth_alg) {
1406        case WLAN_AUTH_OPEN:
1407                txt = "authOK";
1408                /* IEEE 802.11 standard is not completely clear about
1409                 * whether STA is considered authenticated after
1410                 * authentication OK frame has been send or after it
1411                 * has been ACKed. In order to reduce interoperability
1412                 * issues, mark the STA authenticated before ACK. */
1413                sta->flags |= WLAN_STA_AUTH;
1414                break;
1415
1416        case WLAN_AUTH_SHARED_KEY:
1417                if (auth_transaction == 1) {
1418                        if (sta->u.sta.challenge == NULL) {
1419                                sta->u.sta.challenge =
1420                                        ap_auth_make_challenge(local->ap);
1421                                if (sta->u.sta.challenge == NULL) {
1422                                        resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1423                                        goto fail;
1424                                }
1425                        }
1426                } else {
1427                        if (sta->u.sta.challenge == NULL ||
1428                            challenge == NULL ||
1429                            memcmp(sta->u.sta.challenge, challenge,
1430                                   WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1431                            !ieee80211_has_protected(hdr->frame_control)) {
1432                                txt = "challenge response incorrect";
1433                                resp = WLAN_STATUS_CHALLENGE_FAIL;
1434                                goto fail;
1435                        }
1436
1437                        txt = "challenge OK - authOK";
1438                        /* IEEE 802.11 standard is not completely clear about
1439                         * whether STA is considered authenticated after
1440                         * authentication OK frame has been send or after it
1441                         * has been ACKed. In order to reduce interoperability
1442                         * issues, mark the STA authenticated before ACK. */
1443                        sta->flags |= WLAN_STA_AUTH;
1444                        kfree(sta->u.sta.challenge);
1445                        sta->u.sta.challenge = NULL;
1446                }
1447                break;
1448        }
1449
1450 fail:
1451        pos = (__le16 *) body;
1452        *pos = cpu_to_le16(auth_alg);
1453        pos++;
1454        *pos = cpu_to_le16(auth_transaction + 1);
1455        pos++;
1456        *pos = cpu_to_le16(resp); /* status_code */
1457        pos++;
1458        olen = 6;
1459
1460        if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1461            sta->u.sta.challenge != NULL &&
1462            auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1463                u8 *tmp = (u8 *) pos;
1464                *tmp++ = WLAN_EID_CHALLENGE;
1465                *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1466                pos++;
1467                memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1468                olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1469        }
1470
1471        prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1472                         body, olen, hdr->addr2, ap->tx_callback_auth);
1473
1474        if (sta) {
1475                sta->last_rx = jiffies;
1476                atomic_dec(&sta->users);
1477        }
1478
1479        if (resp) {
1480                PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
1481                       "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1482                       dev->name, hdr->addr2,
1483                       auth_alg, auth_transaction, status_code, len,
1484                       le16_to_cpu(hdr->frame_control), resp, txt);
1485        }
1486}
1487
1488
1489/* Called only as a scheduled task for pending AP frames. */
1490static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1491                         struct hostap_80211_rx_status *rx_stats, int reassoc)
1492{
1493        struct net_device *dev = local->dev;
1494        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1495        char body[12], *p, *lpos;
1496        int len, left;
1497        __le16 *pos;
1498        u16 resp = WLAN_STATUS_SUCCESS;
1499        struct sta_info *sta = NULL;
1500        int send_deauth = 0;
1501        char *txt = "";
1502        u8 prev_ap[ETH_ALEN];
1503
1504        left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1505
1506        if (len < (reassoc ? 10 : 4)) {
1507                PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1508                       "(len=%d, reassoc=%d) from %pM\n",
1509                       dev->name, len, reassoc, hdr->addr2);
1510                return;
1511        }
1512
1513        spin_lock_bh(&local->ap->sta_table_lock);
1514        sta = ap_get_sta(local->ap, hdr->addr2);
1515        if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1516                spin_unlock_bh(&local->ap->sta_table_lock);
1517                txt = "trying to associate before authentication";
1518                send_deauth = 1;
1519                resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1520                sta = NULL; /* do not decrement sta->users */
1521                goto fail;
1522        }
1523        atomic_inc(&sta->users);
1524        spin_unlock_bh(&local->ap->sta_table_lock);
1525
1526        pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1527        sta->capability = __le16_to_cpu(*pos);
1528        pos++; left -= 2;
1529        sta->listen_interval = __le16_to_cpu(*pos);
1530        pos++; left -= 2;
1531
1532        if (reassoc) {
1533                memcpy(prev_ap, pos, ETH_ALEN);
1534                pos++; pos++; pos++; left -= 6;
1535        } else
1536                memset(prev_ap, 0, ETH_ALEN);
1537
1538        if (left >= 2) {
1539                unsigned int ileft;
1540                unsigned char *u = (unsigned char *) pos;
1541
1542                if (*u == WLAN_EID_SSID) {
1543                        u++; left--;
1544                        ileft = *u;
1545                        u++; left--;
1546
1547                        if (ileft > left || ileft > MAX_SSID_LEN) {
1548                                txt = "SSID overflow";
1549                                resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1550                                goto fail;
1551                        }
1552
1553                        if (ileft != strlen(local->essid) ||
1554                            memcmp(local->essid, u, ileft) != 0) {
1555                                txt = "not our SSID";
1556                                resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1557                                goto fail;
1558                        }
1559
1560                        u += ileft;
1561                        left -= ileft;
1562                }
1563
1564                if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1565                        u++; left--;
1566                        ileft = *u;
1567                        u++; left--;
1568
1569                        if (ileft > left || ileft == 0 ||
1570                            ileft > WLAN_SUPP_RATES_MAX) {
1571                                txt = "SUPP_RATES len error";
1572                                resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1573                                goto fail;
1574                        }
1575
1576                        memset(sta->supported_rates, 0,
1577                               sizeof(sta->supported_rates));
1578                        memcpy(sta->supported_rates, u, ileft);
1579                        prism2_check_tx_rates(sta);
1580
1581                        u += ileft;
1582                        left -= ileft;
1583                }
1584
1585                if (left > 0) {
1586                        PDEBUG(DEBUG_AP, "%s: assoc from %pM"
1587                               " with extra data (%d bytes) [",
1588                               dev->name, hdr->addr2, left);
1589                        while (left > 0) {
1590                                PDEBUG2(DEBUG_AP, "<%02x>", *u);
1591                                u++; left--;
1592                        }
1593                        PDEBUG2(DEBUG_AP, "]\n");
1594                }
1595        } else {
1596                txt = "frame underflow";
1597                resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1598                goto fail;
1599        }
1600
1601        /* get a unique AID */
1602        if (sta->aid > 0)
1603                txt = "OK, old AID";
1604        else {
1605                spin_lock_bh(&local->ap->sta_table_lock);
1606                for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1607                        if (local->ap->sta_aid[sta->aid - 1] == NULL)
1608                                break;
1609                if (sta->aid > MAX_AID_TABLE_SIZE) {
1610                        sta->aid = 0;
1611                        spin_unlock_bh(&local->ap->sta_table_lock);
1612                        resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1613                        txt = "no room for more AIDs";
1614                } else {
1615                        local->ap->sta_aid[sta->aid - 1] = sta;
1616                        spin_unlock_bh(&local->ap->sta_table_lock);
1617                        txt = "OK, new AID";
1618                }
1619        }
1620
1621 fail:
1622        pos = (__le16 *) body;
1623
1624        if (send_deauth) {
1625                *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1626                pos++;
1627        } else {
1628                /* FIX: CF-Pollable and CF-PollReq should be set to match the
1629                 * values in beacons/probe responses */
1630                /* FIX: how about privacy and WEP? */
1631                /* capability */
1632                *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
1633                pos++;
1634
1635                /* status_code */
1636                *pos = cpu_to_le16(resp);
1637                pos++;
1638
1639                *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1640                                     BIT(14) | BIT(15)); /* AID */
1641                pos++;
1642
1643                /* Supported rates (Information element) */
1644                p = (char *) pos;
1645                *p++ = WLAN_EID_SUPP_RATES;
1646                lpos = p;
1647                *p++ = 0; /* len */
1648                if (local->tx_rate_control & WLAN_RATE_1M) {
1649                        *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1650                        (*lpos)++;
1651                }
1652                if (local->tx_rate_control & WLAN_RATE_2M) {
1653                        *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1654                        (*lpos)++;
1655                }
1656                if (local->tx_rate_control & WLAN_RATE_5M5) {
1657                        *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1658                                0x8b : 0x0b;
1659                        (*lpos)++;
1660                }
1661                if (local->tx_rate_control & WLAN_RATE_11M) {
1662                        *p++ = local->basic_rates & WLAN_RATE_11M ?
1663                                0x96 : 0x16;
1664                        (*lpos)++;
1665                }
1666                pos = (__le16 *) p;
1667        }
1668
1669        prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1670                         (send_deauth ? IEEE80211_STYPE_DEAUTH :
1671                          (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1672                           IEEE80211_STYPE_ASSOC_RESP)),
1673                         body, (u8 *) pos - (u8 *) body,
1674                         hdr->addr2,
1675                         send_deauth ? 0 : local->ap->tx_callback_assoc);
1676
1677        if (sta) {
1678                if (resp == WLAN_STATUS_SUCCESS) {
1679                        sta->last_rx = jiffies;
1680                        /* STA will be marked associated from TX callback, if
1681                         * AssocResp is ACKed */
1682                }
1683                atomic_dec(&sta->users);
1684        }
1685
1686#if 0
1687        PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d "
1688               "prev_ap=%pM) => %d(%d) (%s)\n",
1689               dev->name,
1690               hdr->addr2,
1691               reassoc ? "re" : "", len,
1692               prev_ap,
1693               resp, send_deauth, txt);
1694#endif
1695}
1696
1697
1698/* Called only as a scheduled task for pending AP frames. */
1699static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1700                          struct hostap_80211_rx_status *rx_stats)
1701{
1702        struct net_device *dev = local->dev;
1703        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1704        char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1705        int len;
1706        u16 reason_code;
1707        __le16 *pos;
1708        struct sta_info *sta = NULL;
1709
1710        len = skb->len - IEEE80211_MGMT_HDR_LEN;
1711
1712        if (len < 2) {
1713                printk("handle_deauth - too short payload (len=%d)\n", len);
1714                return;
1715        }
1716
1717        pos = (__le16 *) body;
1718        reason_code = le16_to_cpu(*pos);
1719
1720        PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1721               "reason_code=%d\n", dev->name, hdr->addr2,
1722               len, reason_code);
1723
1724        spin_lock_bh(&local->ap->sta_table_lock);
1725        sta = ap_get_sta(local->ap, hdr->addr2);
1726        if (sta != NULL) {
1727                if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1728                        hostap_event_expired_sta(local->dev, sta);
1729                sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1730        }
1731        spin_unlock_bh(&local->ap->sta_table_lock);
1732        if (sta == NULL) {
1733                printk("%s: deauthentication from %pM, "
1734               "reason_code=%d, but STA not authenticated\n", dev->name,
1735                       hdr->addr2, reason_code);
1736        }
1737}
1738
1739
1740/* Called only as a scheduled task for pending AP frames. */
1741static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1742                            struct hostap_80211_rx_status *rx_stats)
1743{
1744        struct net_device *dev = local->dev;
1745        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1746        char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1747        int len;
1748        u16 reason_code;
1749        __le16 *pos;
1750        struct sta_info *sta = NULL;
1751
1752        len = skb->len - IEEE80211_MGMT_HDR_LEN;
1753
1754        if (len < 2) {
1755                printk("handle_disassoc - too short payload (len=%d)\n", len);
1756                return;
1757        }
1758
1759        pos = (__le16 *) body;
1760        reason_code = le16_to_cpu(*pos);
1761
1762        PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1763               "reason_code=%d\n", dev->name, hdr->addr2,
1764               len, reason_code);
1765
1766        spin_lock_bh(&local->ap->sta_table_lock);
1767        sta = ap_get_sta(local->ap, hdr->addr2);
1768        if (sta != NULL) {
1769                if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1770                        hostap_event_expired_sta(local->dev, sta);
1771                sta->flags &= ~WLAN_STA_ASSOC;
1772        }
1773        spin_unlock_bh(&local->ap->sta_table_lock);
1774        if (sta == NULL) {
1775                printk("%s: disassociation from %pM, "
1776                       "reason_code=%d, but STA not authenticated\n",
1777                       dev->name, hdr->addr2, reason_code);
1778        }
1779}
1780
1781
1782/* Called only as a scheduled task for pending AP frames. */
1783static void ap_handle_data_nullfunc(local_info_t *local,
1784                                    struct ieee80211_hdr *hdr)
1785{
1786        struct net_device *dev = local->dev;
1787
1788        /* some STA f/w's seem to require control::ACK frame for
1789         * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1790         * not send this..
1791         * send control::ACK for the data::nullfunc */
1792
1793        printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1794        prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1795                         NULL, 0, hdr->addr2, 0);
1796}
1797
1798
1799/* Called only as a scheduled task for pending AP frames. */
1800static void ap_handle_dropped_data(local_info_t *local,
1801                                   struct ieee80211_hdr *hdr)
1802{
1803        struct net_device *dev = local->dev;
1804        struct sta_info *sta;
1805        __le16 reason;
1806
1807        spin_lock_bh(&local->ap->sta_table_lock);
1808        sta = ap_get_sta(local->ap, hdr->addr2);
1809        if (sta)
1810                atomic_inc(&sta->users);
1811        spin_unlock_bh(&local->ap->sta_table_lock);
1812
1813        if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1814                PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1815                atomic_dec(&sta->users);
1816                return;
1817        }
1818
1819        reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1820        prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1821                         ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1822                          IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1823                         (char *) &reason, sizeof(reason), hdr->addr2, 0);
1824
1825        if (sta)
1826                atomic_dec(&sta->users);
1827}
1828
1829#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1830
1831
1832/* Called only as a scheduled task for pending AP frames. */
1833static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1834                                 struct sk_buff *skb)
1835{
1836        struct hostap_skb_tx_data *meta;
1837
1838        if (!(sta->flags & WLAN_STA_PS)) {
1839                /* Station has moved to non-PS mode, so send all buffered
1840                 * frames using normal device queue. */
1841                dev_queue_xmit(skb);
1842                return;
1843        }
1844
1845        /* add a flag for hostap_handle_sta_tx() to know that this skb should
1846         * be passed through even though STA is using PS */
1847        meta = (struct hostap_skb_tx_data *) skb->cb;
1848        meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1849        if (!skb_queue_empty(&sta->tx_buf)) {
1850                /* indicate to STA that more frames follow */
1851                meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1852        }
1853        dev_queue_xmit(skb);
1854}
1855
1856
1857/* Called only as a scheduled task for pending AP frames. */
1858static void handle_pspoll(local_info_t *local,
1859                          struct ieee80211_hdr *hdr,
1860                          struct hostap_80211_rx_status *rx_stats)
1861{
1862        struct net_device *dev = local->dev;
1863        struct sta_info *sta;
1864        u16 aid;
1865        struct sk_buff *skb;
1866
1867        PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1868               hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
1869
1870        if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
1871                PDEBUG(DEBUG_AP,
1872                       "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1873                       hdr->addr1);
1874                return;
1875        }
1876
1877        aid = le16_to_cpu(hdr->duration_id);
1878        if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1879                PDEBUG(DEBUG_PS, "   PSPOLL and AID[15:14] not set\n");
1880                return;
1881        }
1882        aid &= ~(BIT(15) | BIT(14));
1883        if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1884                PDEBUG(DEBUG_PS, "   invalid aid=%d\n", aid);
1885                return;
1886        }
1887        PDEBUG(DEBUG_PS2, "   aid=%d\n", aid);
1888
1889        spin_lock_bh(&local->ap->sta_table_lock);
1890        sta = ap_get_sta(local->ap, hdr->addr2);
1891        if (sta)
1892                atomic_inc(&sta->users);
1893        spin_unlock_bh(&local->ap->sta_table_lock);
1894
1895        if (sta == NULL) {
1896                PDEBUG(DEBUG_PS, "   STA not found\n");
1897                return;
1898        }
1899        if (sta->aid != aid) {
1900                PDEBUG(DEBUG_PS, "   received aid=%i does not match with "
1901                       "assoc.aid=%d\n", aid, sta->aid);
1902                return;
1903        }
1904
1905        /* FIX: todo:
1906         * - add timeout for buffering (clear aid in TIM vector if buffer timed
1907         *   out (expiry time must be longer than ListenInterval for
1908         *   the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1909         * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1910         *   sta; store buffer for later use and leave TIM aid bit set? use
1911         *   TX event to check whether frame was ACKed?
1912         */
1913
1914        while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1915                /* send buffered frame .. */
1916                PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1917                       " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1918
1919                pspoll_send_buffered(local, sta, skb);
1920
1921                if (sta->flags & WLAN_STA_PS) {
1922                        /* send only one buffered packet per PS Poll */
1923                        /* FIX: should ignore further PS Polls until the
1924                         * buffered packet that was just sent is acknowledged
1925                         * (Tx or TxExc event) */
1926                        break;
1927                }
1928        }
1929
1930        if (skb_queue_empty(&sta->tx_buf)) {
1931                /* try to clear aid from TIM */
1932                if (!(sta->flags & WLAN_STA_TIM))
1933                        PDEBUG(DEBUG_PS2,  "Re-unsetting TIM for aid %d\n",
1934                               aid);
1935                hostap_set_tim(local, aid, 0);
1936                sta->flags &= ~WLAN_STA_TIM;
1937        }
1938
1939        atomic_dec(&sta->users);
1940}
1941
1942
1943#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1944
1945static void handle_wds_oper_queue(struct work_struct *work)
1946{
1947        struct ap_data *ap = container_of(work, struct ap_data,
1948                                          wds_oper_queue);
1949        local_info_t *local = ap->local;
1950        struct wds_oper_data *entry, *prev;
1951
1952        spin_lock_bh(&local->lock);
1953        entry = local->ap->wds_oper_entries;
1954        local->ap->wds_oper_entries = NULL;
1955        spin_unlock_bh(&local->lock);
1956
1957        while (entry) {
1958                PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1959                       "to AP %pM\n",
1960                       local->dev->name,
1961                       entry->type == WDS_ADD ? "adding" : "removing",
1962                       entry->addr);
1963                if (entry->type == WDS_ADD)
1964                        prism2_wds_add(local, entry->addr, 0);
1965                else if (entry->type == WDS_DEL)
1966                        prism2_wds_del(local, entry->addr, 0, 1);
1967
1968                prev = entry;
1969                entry = entry->next;
1970                kfree(prev);
1971        }
1972}
1973
1974
1975/* Called only as a scheduled task for pending AP frames. */
1976static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1977                          struct hostap_80211_rx_status *rx_stats)
1978{
1979        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1980        char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1981        int len, left;
1982        u16 beacon_int, capability;
1983        __le16 *pos;
1984        char *ssid = NULL;
1985        unsigned char *supp_rates = NULL;
1986        int ssid_len = 0, supp_rates_len = 0;
1987        struct sta_info *sta = NULL;
1988        int new_sta = 0, channel = -1;
1989
1990        len = skb->len - IEEE80211_MGMT_HDR_LEN;
1991
1992        if (len < 8 + 2 + 2) {
1993                printk(KERN_DEBUG "handle_beacon - too short payload "
1994                       "(len=%d)\n", len);
1995                return;
1996        }
1997
1998        pos = (__le16 *) body;
1999        left = len;
2000
2001        /* Timestamp (8 octets) */
2002        pos += 4; left -= 8;
2003        /* Beacon interval (2 octets) */
2004        beacon_int = le16_to_cpu(*pos);
2005        pos++; left -= 2;
2006        /* Capability information (2 octets) */
2007        capability = le16_to_cpu(*pos);
2008        pos++; left -= 2;
2009
2010        if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2011            capability & WLAN_CAPABILITY_IBSS)
2012                return;
2013
2014        if (left >= 2) {
2015                unsigned int ileft;
2016                unsigned char *u = (unsigned char *) pos;
2017
2018                if (*u == WLAN_EID_SSID) {
2019                        u++; left--;
2020                        ileft = *u;
2021                        u++; left--;
2022
2023                        if (ileft > left || ileft > MAX_SSID_LEN) {
2024                                PDEBUG(DEBUG_AP, "SSID: overflow\n");
2025                                return;
2026                        }
2027
2028                        if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2029                            (ileft != strlen(local->essid) ||
2030                             memcmp(local->essid, u, ileft) != 0)) {
2031                                /* not our SSID */
2032                                return;
2033                        }
2034
2035                        ssid = u;
2036                        ssid_len = ileft;
2037
2038                        u += ileft;
2039                        left -= ileft;
2040                }
2041
2042                if (*u == WLAN_EID_SUPP_RATES) {
2043                        u++; left--;
2044                        ileft = *u;
2045                        u++; left--;
2046
2047                        if (ileft > left || ileft == 0 || ileft > 8) {
2048                                PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2049                                return;
2050                        }
2051
2052                        supp_rates = u;
2053                        supp_rates_len = ileft;
2054
2055                        u += ileft;
2056                        left -= ileft;
2057                }
2058
2059                if (*u == WLAN_EID_DS_PARAMS) {
2060                        u++; left--;
2061                        ileft = *u;
2062                        u++; left--;
2063
2064                        if (ileft > left || ileft != 1) {
2065                                PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2066                                return;
2067                        }
2068
2069                        channel = *u;
2070
2071                        u += ileft;
2072                        left -= ileft;
2073                }
2074        }
2075
2076        spin_lock_bh(&local->ap->sta_table_lock);
2077        sta = ap_get_sta(local->ap, hdr->addr2);
2078        if (sta != NULL)
2079                atomic_inc(&sta->users);
2080        spin_unlock_bh(&local->ap->sta_table_lock);
2081
2082        if (sta == NULL) {
2083                /* add new AP */
2084                new_sta = 1;
2085                sta = ap_add_sta(local->ap, hdr->addr2);
2086                if (sta == NULL) {
2087                        printk(KERN_INFO "prism2: kmalloc failed for AP "
2088                               "data structure\n");
2089                        return;
2090                }
2091                hostap_event_new_sta(local->dev, sta);
2092
2093                /* mark APs authentication and associated for pseudo ad-hoc
2094                 * style communication */
2095                sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2096
2097                if (local->ap->autom_ap_wds) {
2098                        hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2099                }
2100        }
2101
2102        sta->ap = 1;
2103        if (ssid) {
2104                sta->u.ap.ssid_len = ssid_len;
2105                memcpy(sta->u.ap.ssid, ssid, ssid_len);
2106                sta->u.ap.ssid[ssid_len] = '\0';
2107        } else {
2108                sta->u.ap.ssid_len = 0;
2109                sta->u.ap.ssid[0] = '\0';
2110        }
2111        sta->u.ap.channel = channel;
2112        sta->rx_packets++;
2113        sta->rx_bytes += len;
2114        sta->u.ap.last_beacon = sta->last_rx = jiffies;
2115        sta->capability = capability;
2116        sta->listen_interval = beacon_int;
2117
2118        atomic_dec(&sta->users);
2119
2120        if (new_sta) {
2121                memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2122                memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2123                prism2_check_tx_rates(sta);
2124        }
2125}
2126
2127#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2128
2129
2130/* Called only as a tasklet. */
2131static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2132                           struct hostap_80211_rx_status *rx_stats)
2133{
2134#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2135        struct net_device *dev = local->dev;
2136#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2137        u16 fc, type, stype;
2138        struct ieee80211_hdr *hdr;
2139
2140        /* FIX: should give skb->len to handler functions and check that the
2141         * buffer is long enough */
2142        hdr = (struct ieee80211_hdr *) skb->data;
2143        fc = le16_to_cpu(hdr->frame_control);
2144        type = fc & IEEE80211_FCTL_FTYPE;
2145        stype = fc & IEEE80211_FCTL_STYPE;
2146
2147#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2148        if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2149                PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2150
2151                if (!(fc & IEEE80211_FCTL_TODS) ||
2152                    (fc & IEEE80211_FCTL_FROMDS)) {
2153                        if (stype == IEEE80211_STYPE_NULLFUNC) {
2154                                /* no ToDS nullfunc seems to be used to check
2155                                 * AP association; so send reject message to
2156                                 * speed up re-association */
2157                                ap_handle_dropped_data(local, hdr);
2158                                goto done;
2159                        }
2160                        PDEBUG(DEBUG_AP, "   not ToDS frame (fc=0x%04x)\n",
2161                               fc);
2162                        goto done;
2163                }
2164
2165                if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2166                        PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2167                               " not own MAC\n", hdr->addr1);
2168                        goto done;
2169                }
2170
2171                if (local->ap->nullfunc_ack &&
2172                    stype == IEEE80211_STYPE_NULLFUNC)
2173                        ap_handle_data_nullfunc(local, hdr);
2174                else
2175                        ap_handle_dropped_data(local, hdr);
2176                goto done;
2177        }
2178
2179        if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2180                handle_beacon(local, skb, rx_stats);
2181                goto done;
2182        }
2183#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2184
2185        if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2186                handle_pspoll(local, hdr, rx_stats);
2187                goto done;
2188        }
2189
2190        if (local->hostapd) {
2191                PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2192                       "subtype=0x%02x\n", type, stype);
2193                goto done;
2194        }
2195
2196#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2197        if (type != IEEE80211_FTYPE_MGMT) {
2198                PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2199                goto done;
2200        }
2201
2202        if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN)) {
2203                PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
2204                       " not own MAC\n", hdr->addr1);
2205                goto done;
2206        }
2207
2208        if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN)) {
2209                PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
2210                       " not own MAC\n", hdr->addr3);
2211                goto done;
2212        }
2213
2214        switch (stype) {
2215        case IEEE80211_STYPE_ASSOC_REQ:
2216                handle_assoc(local, skb, rx_stats, 0);
2217                break;
2218        case IEEE80211_STYPE_ASSOC_RESP:
2219                PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2220                break;
2221        case IEEE80211_STYPE_REASSOC_REQ:
2222                handle_assoc(local, skb, rx_stats, 1);
2223                break;
2224        case IEEE80211_STYPE_REASSOC_RESP:
2225                PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2226                break;
2227        case IEEE80211_STYPE_ATIM:
2228                PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2229                break;
2230        case IEEE80211_STYPE_DISASSOC:
2231                handle_disassoc(local, skb, rx_stats);
2232                break;
2233        case IEEE80211_STYPE_AUTH:
2234                handle_authen(local, skb, rx_stats);
2235                break;
2236        case IEEE80211_STYPE_DEAUTH:
2237                handle_deauth(local, skb, rx_stats);
2238                break;
2239        default:
2240                PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2241                       stype >> 4);
2242                break;
2243        }
2244#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2245
2246 done:
2247        dev_kfree_skb(skb);
2248}
2249
2250
2251/* Called only as a tasklet (software IRQ) */
2252void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2253               struct hostap_80211_rx_status *rx_stats)
2254{
2255        struct hostap_interface *iface;
2256        local_info_t *local;
2257        struct ieee80211_hdr *hdr;
2258
2259        iface = netdev_priv(dev);
2260        local = iface->local;
2261
2262        if (skb->len < 16)
2263                goto drop;
2264
2265        dev->stats.rx_packets++;
2266
2267        hdr = (struct ieee80211_hdr *) skb->data;
2268
2269        if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2270            ieee80211_is_beacon(hdr->frame_control))
2271                goto drop;
2272
2273        skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
2274        handle_ap_item(local, skb, rx_stats);
2275        return;
2276
2277 drop:
2278        dev_kfree_skb(skb);
2279}
2280
2281
2282/* Called only as a tasklet (software IRQ) */
2283static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2284{
2285        struct sk_buff *skb;
2286        struct ieee80211_hdr *hdr;
2287        struct hostap_80211_rx_status rx_stats;
2288
2289        if (skb_queue_empty(&sta->tx_buf))
2290                return;
2291
2292        skb = dev_alloc_skb(16);
2293        if (skb == NULL) {
2294                printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2295                       "failed\n", local->dev->name);
2296                return;
2297        }
2298
2299        hdr = (struct ieee80211_hdr *) skb_put(skb, 16);
2300
2301        /* Generate a fake pspoll frame to start packet delivery */
2302        hdr->frame_control = cpu_to_le16(
2303                IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2304        memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2305        memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2306        hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2307
2308        PDEBUG(DEBUG_PS2,
2309               "%s: Scheduling buffered packet delivery for STA %pM\n",
2310               local->dev->name, sta->addr);
2311
2312        skb->dev = local->dev;
2313
2314        memset(&rx_stats, 0, sizeof(rx_stats));
2315        hostap_rx(local->dev, skb, &rx_stats);
2316}
2317
2318
2319int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2320                           struct iw_quality qual[], int buf_size,
2321                           int aplist)
2322{
2323        struct ap_data *ap = local->ap;
2324        struct list_head *ptr;
2325        int count = 0;
2326
2327        spin_lock_bh(&ap->sta_table_lock);
2328
2329        for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2330             ptr = ptr->next) {
2331                struct sta_info *sta = (struct sta_info *) ptr;
2332
2333                if (aplist && !sta->ap)
2334                        continue;
2335                addr[count].sa_family = ARPHRD_ETHER;
2336                memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2337                if (sta->last_rx_silence == 0)
2338                        qual[count].qual = sta->last_rx_signal < 27 ?
2339                                0 : (sta->last_rx_signal - 27) * 92 / 127;
2340                else
2341                        qual[count].qual = sta->last_rx_signal -
2342                                sta->last_rx_silence - 35;
2343                qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2344                qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2345                qual[count].updated = sta->last_rx_updated;
2346
2347                sta->last_rx_updated = IW_QUAL_DBM;
2348
2349                count++;
2350                if (count >= buf_size)
2351                        break;
2352        }
2353        spin_unlock_bh(&ap->sta_table_lock);
2354
2355        return count;
2356}
2357
2358
2359/* Translate our list of Access Points & Stations to a card independant
2360 * format that the Wireless Tools will understand - Jean II */
2361int prism2_ap_translate_scan(struct net_device *dev,
2362                             struct iw_request_info *info, char *buffer)
2363{
2364        struct hostap_interface *iface;
2365        local_info_t *local;
2366        struct ap_data *ap;
2367        struct list_head *ptr;
2368        struct iw_event iwe;
2369        char *current_ev = buffer;
2370        char *end_buf = buffer + IW_SCAN_MAX_DATA;
2371#if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2372        char buf[64];
2373#endif
2374
2375        iface = netdev_priv(dev);
2376        local = iface->local;
2377        ap = local->ap;
2378
2379        spin_lock_bh(&ap->sta_table_lock);
2380
2381        for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2382             ptr = ptr->next) {
2383                struct sta_info *sta = (struct sta_info *) ptr;
2384
2385                /* First entry *MUST* be the AP MAC address */
2386                memset(&iwe, 0, sizeof(iwe));
2387                iwe.cmd = SIOCGIWAP;
2388                iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2389                memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2390                iwe.len = IW_EV_ADDR_LEN;
2391                current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2392                                                  &iwe, IW_EV_ADDR_LEN);
2393
2394                /* Use the mode to indicate if it's a station or
2395                 * an Access Point */
2396                memset(&iwe, 0, sizeof(iwe));
2397                iwe.cmd = SIOCGIWMODE;
2398                if (sta->ap)
2399                        iwe.u.mode = IW_MODE_MASTER;
2400                else
2401                        iwe.u.mode = IW_MODE_INFRA;
2402                iwe.len = IW_EV_UINT_LEN;
2403                current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2404                                                  &iwe, IW_EV_UINT_LEN);
2405
2406                /* Some quality */
2407                memset(&iwe, 0, sizeof(iwe));
2408                iwe.cmd = IWEVQUAL;
2409                if (sta->last_rx_silence == 0)
2410                        iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2411                                0 : (sta->last_rx_signal - 27) * 92 / 127;
2412                else
2413                        iwe.u.qual.qual = sta->last_rx_signal -
2414                                sta->last_rx_silence - 35;
2415                iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2416                iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2417                iwe.u.qual.updated = sta->last_rx_updated;
2418                iwe.len = IW_EV_QUAL_LEN;
2419                current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2420                                                  &iwe, IW_EV_QUAL_LEN);
2421
2422#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2423                if (sta->ap) {
2424                        memset(&iwe, 0, sizeof(iwe));
2425                        iwe.cmd = SIOCGIWESSID;
2426                        iwe.u.data.length = sta->u.ap.ssid_len;
2427                        iwe.u.data.flags = 1;
2428                        current_ev = iwe_stream_add_point(info, current_ev,
2429                                                          end_buf, &iwe,
2430                                                          sta->u.ap.ssid);
2431
2432                        memset(&iwe, 0, sizeof(iwe));
2433                        iwe.cmd = SIOCGIWENCODE;
2434                        if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2435                                iwe.u.data.flags =
2436                                        IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2437                        else
2438                                iwe.u.data.flags = IW_ENCODE_DISABLED;
2439                        current_ev = iwe_stream_add_point(info, current_ev,
2440                                                          end_buf, &iwe,
2441                                                          sta->u.ap.ssid);
2442
2443                        if (sta->u.ap.channel > 0 &&
2444                            sta->u.ap.channel <= FREQ_COUNT) {
2445                                memset(&iwe, 0, sizeof(iwe));
2446                                iwe.cmd = SIOCGIWFREQ;
2447                                iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2448                                        * 100000;
2449                                iwe.u.freq.e = 1;
2450                                current_ev = iwe_stream_add_event(
2451                                        info, current_ev, end_buf, &iwe,
2452                                        IW_EV_FREQ_LEN);
2453                        }
2454
2455                        memset(&iwe, 0, sizeof(iwe));
2456                        iwe.cmd = IWEVCUSTOM;
2457                        sprintf(buf, "beacon_interval=%d",
2458                                sta->listen_interval);
2459                        iwe.u.data.length = strlen(buf);
2460                        current_ev = iwe_stream_add_point(info, current_ev,
2461                                                          end_buf, &iwe, buf);
2462                }
2463#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2464
2465                sta->last_rx_updated = IW_QUAL_DBM;
2466
2467                /* To be continued, we should make good use of IWEVCUSTOM */
2468        }
2469
2470        spin_unlock_bh(&ap->sta_table_lock);
2471
2472        return current_ev - buffer;
2473}
2474
2475
2476static int prism2_hostapd_add_sta(struct ap_data *ap,
2477                                  struct prism2_hostapd_param *param)
2478{
2479        struct sta_info *sta;
2480
2481        spin_lock_bh(&ap->sta_table_lock);
2482        sta = ap_get_sta(ap, param->sta_addr);
2483        if (sta)
2484                atomic_inc(&sta->users);
2485        spin_unlock_bh(&ap->sta_table_lock);
2486
2487        if (sta == NULL) {
2488                sta = ap_add_sta(ap, param->sta_addr);
2489                if (sta == NULL)
2490                        return -1;
2491        }
2492
2493        if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2494                hostap_event_new_sta(sta->local->dev, sta);
2495
2496        sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2497        sta->last_rx = jiffies;
2498        sta->aid = param->u.add_sta.aid;
2499        sta->capability = param->u.add_sta.capability;
2500        sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2501        if (sta->tx_supp_rates & WLAN_RATE_1M)
2502                sta->supported_rates[0] = 2;
2503        if (sta->tx_supp_rates & WLAN_RATE_2M)
2504                sta->supported_rates[1] = 4;
2505        if (sta->tx_supp_rates & WLAN_RATE_5M5)
2506                sta->supported_rates[2] = 11;
2507        if (sta->tx_supp_rates & WLAN_RATE_11M)
2508                sta->supported_rates[3] = 22;
2509        prism2_check_tx_rates(sta);
2510        atomic_dec(&sta->users);
2511        return 0;
2512}
2513
2514
2515static int prism2_hostapd_remove_sta(struct ap_data *ap,
2516                                     struct prism2_hostapd_param *param)
2517{
2518        struct sta_info *sta;
2519
2520        spin_lock_bh(&ap->sta_table_lock);
2521        sta = ap_get_sta(ap, param->sta_addr);
2522        if (sta) {
2523                ap_sta_hash_del(ap, sta);
2524                list_del(&sta->list);
2525        }
2526        spin_unlock_bh(&ap->sta_table_lock);
2527
2528        if (!sta)
2529                return -ENOENT;
2530
2531        if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2532                hostap_event_expired_sta(sta->local->dev, sta);
2533        ap_free_sta(ap, sta);
2534
2535        return 0;
2536}
2537
2538
2539static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2540                                       struct prism2_hostapd_param *param)
2541{
2542        struct sta_info *sta;
2543
2544        spin_lock_bh(&ap->sta_table_lock);
2545        sta = ap_get_sta(ap, param->sta_addr);
2546        if (sta)
2547                atomic_inc(&sta->users);
2548        spin_unlock_bh(&ap->sta_table_lock);
2549
2550        if (!sta)
2551                return -ENOENT;
2552
2553        param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2554
2555        atomic_dec(&sta->users);
2556
2557        return 1;
2558}
2559
2560
2561static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2562                                        struct prism2_hostapd_param *param)
2563{
2564        struct sta_info *sta;
2565
2566        spin_lock_bh(&ap->sta_table_lock);
2567        sta = ap_get_sta(ap, param->sta_addr);
2568        if (sta) {
2569                sta->flags |= param->u.set_flags_sta.flags_or;
2570                sta->flags &= param->u.set_flags_sta.flags_and;
2571        }
2572        spin_unlock_bh(&ap->sta_table_lock);
2573
2574        if (!sta)
2575                return -ENOENT;
2576
2577        return 0;
2578}
2579
2580
2581static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2582                                          struct prism2_hostapd_param *param)
2583{
2584        struct sta_info *sta;
2585        int rate;
2586
2587        spin_lock_bh(&ap->sta_table_lock);
2588        sta = ap_get_sta(ap, param->sta_addr);
2589        if (sta) {
2590                sta->rx_packets = sta->tx_packets = 0;
2591                sta->rx_bytes = sta->tx_bytes = 0;
2592                for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2593                        sta->tx_count[rate] = 0;
2594                        sta->rx_count[rate] = 0;
2595                }
2596        }
2597        spin_unlock_bh(&ap->sta_table_lock);
2598
2599        if (!sta)
2600                return -ENOENT;
2601
2602        return 0;
2603}
2604
2605
2606int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2607{
2608        switch (param->cmd) {
2609        case PRISM2_HOSTAPD_FLUSH:
2610                ap_control_kickall(ap);
2611                return 0;
2612        case PRISM2_HOSTAPD_ADD_STA:
2613                return prism2_hostapd_add_sta(ap, param);
2614        case PRISM2_HOSTAPD_REMOVE_STA:
2615                return prism2_hostapd_remove_sta(ap, param);
2616        case PRISM2_HOSTAPD_GET_INFO_STA:
2617                return prism2_hostapd_get_info_sta(ap, param);
2618        case PRISM2_HOSTAPD_SET_FLAGS_STA:
2619                return prism2_hostapd_set_flags_sta(ap, param);
2620        case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2621                return prism2_hostapd_sta_clear_stats(ap, param);
2622        default:
2623                printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2624                       param->cmd);
2625                return -EOPNOTSUPP;
2626        }
2627}
2628
2629
2630/* Update station info for host-based TX rate control and return current
2631 * TX rate */
2632static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2633{
2634        int ret = sta->tx_rate;
2635        struct hostap_interface *iface;
2636        local_info_t *local;
2637
2638        iface = netdev_priv(dev);
2639        local = iface->local;
2640
2641        sta->tx_count[sta->tx_rate_idx]++;
2642        sta->tx_since_last_failure++;
2643        sta->tx_consecutive_exc = 0;
2644        if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2645            sta->tx_rate_idx < sta->tx_max_rate) {
2646                /* use next higher rate */
2647                int old_rate, new_rate;
2648                old_rate = new_rate = sta->tx_rate_idx;
2649                while (new_rate < sta->tx_max_rate) {
2650                        new_rate++;
2651                        if (ap_tx_rate_ok(new_rate, sta, local)) {
2652                                sta->tx_rate_idx = new_rate;
2653                                break;
2654                        }
2655                }
2656                if (old_rate != sta->tx_rate_idx) {
2657                        switch (sta->tx_rate_idx) {
2658                        case 0: sta->tx_rate = 10; break;
2659                        case 1: sta->tx_rate = 20; break;
2660                        case 2: sta->tx_rate = 55; break;
2661                        case 3: sta->tx_rate = 110; break;
2662                        default: sta->tx_rate = 0; break;
2663                        }
2664                        PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2665                               dev->name, sta->addr, sta->tx_rate);
2666                }
2667                sta->tx_since_last_failure = 0;
2668        }
2669
2670        return ret;
2671}
2672
2673
2674/* Called only from software IRQ. Called for each TX frame prior possible
2675 * encryption and transmit. */
2676ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2677{
2678        struct sta_info *sta = NULL;
2679        struct sk_buff *skb = tx->skb;
2680        int set_tim, ret;
2681        struct ieee80211_hdr *hdr;
2682        struct hostap_skb_tx_data *meta;
2683
2684        meta = (struct hostap_skb_tx_data *) skb->cb;
2685        ret = AP_TX_CONTINUE;
2686        if (local->ap == NULL || skb->len < 10 ||
2687            meta->iface->type == HOSTAP_INTERFACE_STA)
2688                goto out;
2689
2690        hdr = (struct ieee80211_hdr *) skb->data;
2691
2692        if (hdr->addr1[0] & 0x01) {
2693                /* broadcast/multicast frame - no AP related processing */
2694                if (local->ap->num_sta <= 0)
2695                        ret = AP_TX_DROP;
2696                goto out;
2697        }
2698
2699        /* unicast packet - check whether destination STA is associated */
2700        spin_lock(&local->ap->sta_table_lock);
2701        sta = ap_get_sta(local->ap, hdr->addr1);
2702        if (sta)
2703                atomic_inc(&sta->users);
2704        spin_unlock(&local->ap->sta_table_lock);
2705
2706        if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2707            !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2708            meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2709            meta->iface->type != HOSTAP_INTERFACE_AP) {
2710#if 0
2711                /* This can happen, e.g., when wlan0 is added to a bridge and
2712                 * bridging code does not know which port is the correct target
2713                 * for a unicast frame. In this case, the packet is send to all
2714                 * ports of the bridge. Since this is a valid scenario, do not
2715                 * print out any errors here. */
2716                if (net_ratelimit()) {
2717                        printk(KERN_DEBUG "AP: drop packet to non-associated "
2718                               "STA %pM\n", hdr->addr1);
2719                }
2720#endif
2721                local->ap->tx_drop_nonassoc++;
2722                ret = AP_TX_DROP;
2723                goto out;
2724        }
2725
2726        if (sta == NULL)
2727                goto out;
2728
2729        if (!(sta->flags & WLAN_STA_AUTHORIZED))
2730                ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2731
2732        /* Set tx_rate if using host-based TX rate control */
2733        if (!local->fw_tx_rate_control)
2734                local->ap->last_tx_rate = meta->rate =
2735                        ap_update_sta_tx_rate(sta, local->dev);
2736
2737        if (local->iw_mode != IW_MODE_MASTER)
2738                goto out;
2739
2740        if (!(sta->flags & WLAN_STA_PS))
2741                goto out;
2742
2743        if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2744                /* indicate to STA that more frames follow */
2745                hdr->frame_control |=
2746                        cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2747        }
2748
2749        if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2750                /* packet was already buffered and now send due to
2751                 * PS poll, so do not rebuffer it */
2752                goto out;
2753        }
2754
2755        if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2756                PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2757                       "PS mode buffer\n",
2758                       local->dev->name, sta->addr);
2759                /* Make sure that TIM is set for the station (it might not be
2760                 * after AP wlan hw reset). */
2761                /* FIX: should fix hw reset to restore bits based on STA
2762                 * buffer state.. */
2763                hostap_set_tim(local, sta->aid, 1);
2764                sta->flags |= WLAN_STA_TIM;
2765                ret = AP_TX_DROP;
2766                goto out;
2767        }
2768
2769        /* STA in PS mode, buffer frame for later delivery */
2770        set_tim = skb_queue_empty(&sta->tx_buf);
2771        skb_queue_tail(&sta->tx_buf, skb);
2772        /* FIX: could save RX time to skb and expire buffered frames after
2773         * some time if STA does not poll for them */
2774
2775        if (set_tim) {
2776                if (sta->flags & WLAN_STA_TIM)
2777                        PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2778                               sta->aid);
2779                hostap_set_tim(local, sta->aid, 1);
2780                sta->flags |= WLAN_STA_TIM;
2781        }
2782
2783        ret = AP_TX_BUFFERED;
2784
2785 out:
2786        if (sta != NULL) {
2787                if (ret == AP_TX_CONTINUE ||
2788                    ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2789                        sta->tx_packets++;
2790                        sta->tx_bytes += skb->len;
2791                        sta->last_tx = jiffies;
2792                }
2793
2794                if ((ret == AP_TX_CONTINUE ||
2795                     ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2796                    sta->crypt && tx->host_encrypt) {
2797                        tx->crypt = sta->crypt;
2798                        tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2799                                            * be called to release sta info
2800                                            * later */
2801                } else
2802                        atomic_dec(&sta->users);
2803        }
2804
2805        return ret;
2806}
2807
2808
2809void hostap_handle_sta_release(void *ptr)
2810{
2811        struct sta_info *sta = ptr;
2812        atomic_dec(&sta->users);
2813}
2814
2815
2816/* Called only as a tasklet (software IRQ) */
2817void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2818{
2819        struct sta_info *sta;
2820        struct ieee80211_hdr *hdr;
2821        struct hostap_skb_tx_data *meta;
2822
2823        hdr = (struct ieee80211_hdr *) skb->data;
2824        meta = (struct hostap_skb_tx_data *) skb->cb;
2825
2826        spin_lock(&local->ap->sta_table_lock);
2827        sta = ap_get_sta(local->ap, hdr->addr1);
2828        if (!sta) {
2829                spin_unlock(&local->ap->sta_table_lock);
2830                PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
2831                       " for this TX error (@%lu)\n",
2832                       local->dev->name, hdr->addr1, jiffies);
2833                return;
2834        }
2835
2836        sta->tx_since_last_failure = 0;
2837        sta->tx_consecutive_exc++;
2838
2839        if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2840            sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2841                /* use next lower rate */
2842                int old, rate;
2843                old = rate = sta->tx_rate_idx;
2844                while (rate > 0) {
2845                        rate--;
2846                        if (ap_tx_rate_ok(rate, sta, local)) {
2847                                sta->tx_rate_idx = rate;
2848                                break;
2849                        }
2850                }
2851                if (old != sta->tx_rate_idx) {
2852                        switch (sta->tx_rate_idx) {
2853                        case 0: sta->tx_rate = 10; break;
2854                        case 1: sta->tx_rate = 20; break;
2855                        case 2: sta->tx_rate = 55; break;
2856                        case 3: sta->tx_rate = 110; break;
2857                        default: sta->tx_rate = 0; break;
2858                        }
2859                        PDEBUG(DEBUG_AP,
2860                               "%s: STA %pM TX rate lowered to %d\n",
2861                               local->dev->name, sta->addr, sta->tx_rate);
2862                }
2863                sta->tx_consecutive_exc = 0;
2864        }
2865        spin_unlock(&local->ap->sta_table_lock);
2866}
2867
2868
2869static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2870                                  int pwrmgt, int type, int stype)
2871{
2872        if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2873                sta->flags |= WLAN_STA_PS;
2874                PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
2875                       "mode (type=0x%02X, stype=0x%02X)\n",
2876                       sta->addr, type >> 2, stype >> 4);
2877        } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2878                sta->flags &= ~WLAN_STA_PS;
2879                PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
2880                       "PS mode (type=0x%02X, stype=0x%02X)\n",
2881                       sta->addr, type >> 2, stype >> 4);
2882                if (type != IEEE80211_FTYPE_CTL ||
2883                    stype != IEEE80211_STYPE_PSPOLL)
2884                        schedule_packet_send(local, sta);
2885        }
2886}
2887
2888
2889/* Called only as a tasklet (software IRQ). Called for each RX frame to update
2890 * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2891int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
2892{
2893        struct sta_info *sta;
2894        u16 fc;
2895
2896        spin_lock(&local->ap->sta_table_lock);
2897        sta = ap_get_sta(local->ap, hdr->addr2);
2898        if (sta)
2899                atomic_inc(&sta->users);
2900        spin_unlock(&local->ap->sta_table_lock);
2901
2902        if (!sta)
2903                return -1;
2904
2905        fc = le16_to_cpu(hdr->frame_control);
2906        hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2907                              fc & IEEE80211_FCTL_FTYPE,
2908                              fc & IEEE80211_FCTL_STYPE);
2909
2910        atomic_dec(&sta->users);
2911        return 0;
2912}
2913
2914
2915/* Called only as a tasklet (software IRQ). Called for each RX frame after
2916 * getting RX header and payload from hardware. */
2917ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2918                               struct sk_buff *skb,
2919                               struct hostap_80211_rx_status *rx_stats,
2920                               int wds)
2921{
2922        int ret;
2923        struct sta_info *sta;
2924        u16 fc, type, stype;
2925        struct ieee80211_hdr *hdr;
2926
2927        if (local->ap == NULL)
2928                return AP_RX_CONTINUE;
2929
2930        hdr = (struct ieee80211_hdr *) skb->data;
2931
2932        fc = le16_to_cpu(hdr->frame_control);
2933        type = fc & IEEE80211_FCTL_FTYPE;
2934        stype = fc & IEEE80211_FCTL_STYPE;
2935
2936        spin_lock(&local->ap->sta_table_lock);
2937        sta = ap_get_sta(local->ap, hdr->addr2);
2938        if (sta)
2939                atomic_inc(&sta->users);
2940        spin_unlock(&local->ap->sta_table_lock);
2941
2942        if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2943                ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2944        else
2945                ret = AP_RX_CONTINUE;
2946
2947
2948        if (fc & IEEE80211_FCTL_TODS) {
2949                if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2950                        if (local->hostapd) {
2951                                prism2_rx_80211(local->apdev, skb, rx_stats,
2952                                                PRISM2_RX_NON_ASSOC);
2953#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2954                        } else {
2955                                printk(KERN_DEBUG "%s: dropped received packet"
2956                                       " from non-associated STA %pM"
2957                                       " (type=0x%02x, subtype=0x%02x)\n",
2958                                       dev->name, hdr->addr2,
2959                                       type >> 2, stype >> 4);
2960                                hostap_rx(dev, skb, rx_stats);
2961#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2962                        }
2963                        ret = AP_RX_EXIT;
2964                        goto out;
2965                }
2966        } else if (fc & IEEE80211_FCTL_FROMDS) {
2967                if (!wds) {
2968                        /* FromDS frame - not for us; probably
2969                         * broadcast/multicast in another BSS - drop */
2970                        if (memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2971                                printk(KERN_DEBUG "Odd.. FromDS packet "
2972                                       "received with own BSSID\n");
2973                                hostap_dump_rx_80211(dev->name, skb, rx_stats);
2974                        }
2975                        ret = AP_RX_DROP;
2976                        goto out;
2977                }
2978        } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2979                   memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
2980
2981                if (local->hostapd) {
2982                        prism2_rx_80211(local->apdev, skb, rx_stats,
2983                                        PRISM2_RX_NON_ASSOC);
2984#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2985                } else {
2986                        /* At least Lucent f/w seems to send data::nullfunc
2987                         * frames with no ToDS flag when the current AP returns
2988                         * after being unavailable for some time. Speed up
2989                         * re-association by informing the station about it not
2990                         * being associated. */
2991                        printk(KERN_DEBUG "%s: rejected received nullfunc frame"
2992                               " without ToDS from not associated STA %pM\n",
2993                               dev->name, hdr->addr2);
2994                        hostap_rx(dev, skb, rx_stats);
2995#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2996                }
2997                ret = AP_RX_EXIT;
2998                goto out;
2999        } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3000                /* At least Lucent cards seem to send periodic nullfunc
3001                 * frames with ToDS. Let these through to update SQ
3002                 * stats and PS state. Nullfunc frames do not contain
3003                 * any data and they will be dropped below. */
3004        } else {
3005                /* If BSSID (Addr3) is foreign, this frame is a normal
3006                 * broadcast frame from an IBSS network. Drop it silently.
3007                 * If BSSID is own, report the dropping of this frame. */
3008                if (memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
3009                        printk(KERN_DEBUG "%s: dropped received packet from %pM"
3010                               " with no ToDS flag "
3011                               "(type=0x%02x, subtype=0x%02x)\n", dev->name,
3012                               hdr->addr2, type >> 2, stype >> 4);
3013                        hostap_dump_rx_80211(dev->name, skb, rx_stats);
3014                }
3015                ret = AP_RX_DROP;
3016                goto out;
3017        }
3018
3019        if (sta) {
3020                hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3021                                      type, stype);
3022
3023                sta->rx_packets++;
3024                sta->rx_bytes += skb->len;
3025                sta->last_rx = jiffies;
3026        }
3027
3028        if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3029            fc & IEEE80211_FCTL_TODS) {
3030                if (local->hostapd) {
3031                        prism2_rx_80211(local->apdev, skb, rx_stats,
3032                                        PRISM2_RX_NULLFUNC_ACK);
3033#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3034                } else {
3035                        /* some STA f/w's seem to require control::ACK frame
3036                         * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3037                         * from Compaq) does not send this.. Try to generate
3038                         * ACK for these frames from the host driver to make
3039                         * power saving work with, e.g., Lucent WaveLAN f/w */
3040                        hostap_rx(dev, skb, rx_stats);
3041#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3042                }
3043                ret = AP_RX_EXIT;
3044                goto out;
3045        }
3046
3047 out:
3048        if (sta)
3049                atomic_dec(&sta->users);
3050
3051        return ret;
3052}
3053
3054
3055/* Called only as a tasklet (software IRQ) */
3056int hostap_handle_sta_crypto(local_info_t *local,
3057                             struct ieee80211_hdr *hdr,
3058                             struct lib80211_crypt_data **crypt,
3059                             void **sta_ptr)
3060{
3061        struct sta_info *sta;
3062
3063        spin_lock(&local->ap->sta_table_lock);
3064        sta = ap_get_sta(local->ap, hdr->addr2);
3065        if (sta)
3066                atomic_inc(&sta->users);
3067        spin_unlock(&local->ap->sta_table_lock);
3068
3069        if (!sta)
3070                return -1;
3071
3072        if (sta->crypt) {
3073                *crypt = sta->crypt;
3074                *sta_ptr = sta;
3075                /* hostap_handle_sta_release() will be called to release STA
3076                 * info */
3077        } else
3078                atomic_dec(&sta->users);
3079
3080        return 0;
3081}
3082
3083
3084/* Called only as a tasklet (software IRQ) */
3085int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3086{
3087        struct sta_info *sta;
3088        int ret = 0;
3089
3090        spin_lock(&ap->sta_table_lock);
3091        sta = ap_get_sta(ap, sta_addr);
3092        if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3093                ret = 1;
3094        spin_unlock(&ap->sta_table_lock);
3095
3096        return ret;
3097}
3098
3099
3100/* Called only as a tasklet (software IRQ) */
3101int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3102{
3103        struct sta_info *sta;
3104        int ret = 0;
3105
3106        spin_lock(&ap->sta_table_lock);
3107        sta = ap_get_sta(ap, sta_addr);
3108        if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3109            ((sta->flags & WLAN_STA_AUTHORIZED) ||
3110             ap->local->ieee_802_1x == 0))
3111                ret = 1;
3112        spin_unlock(&ap->sta_table_lock);
3113
3114        return ret;
3115}
3116
3117
3118/* Called only as a tasklet (software IRQ) */
3119int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3120{
3121        struct sta_info *sta;
3122        int ret = 1;
3123
3124        if (!ap)
3125                return -1;
3126
3127        spin_lock(&ap->sta_table_lock);
3128        sta = ap_get_sta(ap, sta_addr);
3129        if (sta)
3130                ret = 0;
3131        spin_unlock(&ap->sta_table_lock);
3132
3133        if (ret == 1) {
3134                sta = ap_add_sta(ap, sta_addr);
3135                if (!sta)
3136                        return -1;
3137                sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3138                sta->ap = 1;
3139                memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3140                /* No way of knowing which rates are supported since we did not
3141                 * get supported rates element from beacon/assoc req. Assume
3142                 * that remote end supports all 802.11b rates. */
3143                sta->supported_rates[0] = 0x82;
3144                sta->supported_rates[1] = 0x84;
3145                sta->supported_rates[2] = 0x0b;
3146                sta->supported_rates[3] = 0x16;
3147                sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3148                        WLAN_RATE_5M5 | WLAN_RATE_11M;
3149                sta->tx_rate = 110;
3150                sta->tx_max_rate = sta->tx_rate_idx = 3;
3151        }
3152
3153        return ret;
3154}
3155
3156
3157/* Called only as a tasklet (software IRQ) */
3158int hostap_update_rx_stats(struct ap_data *ap,
3159                           struct ieee80211_hdr *hdr,
3160                           struct hostap_80211_rx_status *rx_stats)
3161{
3162        struct sta_info *sta;
3163
3164        if (!ap)
3165                return -1;
3166
3167        spin_lock(&ap->sta_table_lock);
3168        sta = ap_get_sta(ap, hdr->addr2);
3169        if (sta) {
3170                sta->last_rx_silence = rx_stats->noise;
3171                sta->last_rx_signal = rx_stats->signal;
3172                sta->last_rx_rate = rx_stats->rate;
3173                sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3174                if (rx_stats->rate == 10)
3175                        sta->rx_count[0]++;
3176                else if (rx_stats->rate == 20)
3177                        sta->rx_count[1]++;
3178                else if (rx_stats->rate == 55)
3179                        sta->rx_count[2]++;
3180                else if (rx_stats->rate == 110)
3181                        sta->rx_count[3]++;
3182        }
3183        spin_unlock(&ap->sta_table_lock);
3184
3185        return sta ? 0 : -1;
3186}
3187
3188
3189void hostap_update_rates(local_info_t *local)
3190{
3191        struct sta_info *sta;
3192        struct ap_data *ap = local->ap;
3193
3194        if (!ap)
3195                return;
3196
3197        spin_lock_bh(&ap->sta_table_lock);
3198        list_for_each_entry(sta, &ap->sta_list, list) {
3199                prism2_check_tx_rates(sta);
3200        }
3201        spin_unlock_bh(&ap->sta_table_lock);
3202}
3203
3204
3205void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3206                         struct lib80211_crypt_data ***crypt)
3207{
3208        struct sta_info *sta;
3209
3210        spin_lock_bh(&ap->sta_table_lock);
3211        sta = ap_get_sta(ap, addr);
3212        if (sta)
3213                atomic_inc(&sta->users);
3214        spin_unlock_bh(&ap->sta_table_lock);
3215
3216        if (!sta && permanent)
3217                sta = ap_add_sta(ap, addr);
3218
3219        if (!sta)
3220                return NULL;
3221
3222        if (permanent)
3223                sta->flags |= WLAN_STA_PERM;
3224
3225        *crypt = &sta->crypt;
3226
3227        return sta;
3228}
3229
3230
3231void hostap_add_wds_links(local_info_t *local)
3232{
3233        struct ap_data *ap = local->ap;
3234        struct sta_info *sta;
3235
3236        spin_lock_bh(&ap->sta_table_lock);
3237        list_for_each_entry(sta, &ap->sta_list, list) {
3238                if (sta->ap)
3239                        hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3240        }
3241        spin_unlock_bh(&ap->sta_table_lock);
3242
3243        schedule_work(&local->ap->wds_oper_queue);
3244}
3245
3246
3247void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3248{
3249        struct wds_oper_data *entry;
3250
3251        entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3252        if (!entry)
3253                return;
3254        memcpy(entry->addr, addr, ETH_ALEN);
3255        entry->type = type;
3256        spin_lock_bh(&local->lock);
3257        entry->next = local->ap->wds_oper_entries;
3258        local->ap->wds_oper_entries = entry;
3259        spin_unlock_bh(&local->lock);
3260
3261        schedule_work(&local->ap->wds_oper_queue);
3262}
3263
3264
3265EXPORT_SYMBOL(hostap_init_data);
3266EXPORT_SYMBOL(hostap_init_ap_proc);
3267EXPORT_SYMBOL(hostap_free_data);
3268EXPORT_SYMBOL(hostap_check_sta_fw_version);
3269EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3270#ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3271#endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3272