intersil/hostap/hostap_ap.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Intersil Prism2 driver with Host AP (software access point) support
0004  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
0005  * <j@w1.fi>
0006  * Copyright (c) 2002-2005, Jouni Malinen <j@w1.fi>
0007  *
0008  * This file is to be included into hostap.c when S/W AP functionality is
0009  * compiled.
0010  *
0011  * AP:  FIX:
0012  * - if unicast Class 2 (assoc,reassoc,disassoc) frame received from
0013  *   unauthenticated STA, send deauth. frame (8802.11: 5.5)
0014  * - if unicast Class 3 (data with to/from DS,deauth,pspoll) frame received
0015  *   from authenticated, but unassoc STA, send disassoc frame (8802.11: 5.5)
0016  * - if unicast Class 3 received from unauthenticated STA, send deauth. frame
0017  *   (8802.11: 5.5)
0018  */
0019
0020 #include <linux/proc_fs.h>
0021 #include <linux/seq_file.h>
0022 #include <linux/delay.h>
0023 #include <linux/random.h>
0024 #include <linux/if_arp.h>
0025 #include <linux/slab.h>
0026 #include <linux/export.h>
0027 #include <linux/moduleparam.h>
0028 #include <linux/etherdevice.h>
0029
0030 #include "hostap_wlan.h"
0031 #include "hostap.h"
0032 #include "hostap_ap.h"
0033
0034 static int other_ap_policy[MAX_PARM_DEVICES] = { AP_OTHER_AP_SKIP_ALL,
0035                          DEF_INTS };
0036 module_param_array(other_ap_policy, int, NULL, 0444);
0037 MODULE_PARM_DESC(other_ap_policy, "Other AP beacon monitoring policy (0-3)");
0038
0039 static int ap_max_inactivity[MAX_PARM_DEVICES] = { AP_MAX_INACTIVITY_SEC,
0040                            DEF_INTS };
0041 module_param_array(ap_max_inactivity, int, NULL, 0444);
0042 MODULE_PARM_DESC(ap_max_inactivity, "AP timeout (in seconds) for station "
0043          "inactivity");
0044
0045 static int ap_bridge_packets[MAX_PARM_DEVICES] = { 1, DEF_INTS };
0046 module_param_array(ap_bridge_packets, int, NULL, 0444);
0047 MODULE_PARM_DESC(ap_bridge_packets, "Bridge packets directly between "
0048          "stations");
0049
0050 static int autom_ap_wds[MAX_PARM_DEVICES] = { 0, DEF_INTS };
0051 module_param_array(autom_ap_wds, int, NULL, 0444);
0052 MODULE_PARM_DESC(autom_ap_wds, "Add WDS connections to other APs "
0053          "automatically");
0054
0055
0056 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta);
0057 static void hostap_event_expired_sta(struct net_device *dev,
0058                      struct sta_info *sta);
0059 static void handle_add_proc_queue(struct work_struct *work);
0060
0061 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0062 static void handle_wds_oper_queue(struct work_struct *work);
0063 static void prism2_send_mgmt(struct net_device *dev,
0064                  u16 type_subtype, char *body,
0065                  int body_len, u8 *addr, u16 tx_cb_idx);
0066 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0067
0068
0069 #if !defined(PRISM2_NO_PROCFS_DEBUG) && defined(CONFIG_PROC_FS)
0070 static int ap_debug_proc_show(struct seq_file *m, void *v)
0071 {
0072     struct ap_data *ap = pde_data(file_inode(m->file));
0073
0074     seq_printf(m, "BridgedUnicastFrames=%u\n", ap->bridged_unicast);
0075     seq_printf(m, "BridgedMulticastFrames=%u\n", ap->bridged_multicast);
0076     seq_printf(m, "max_inactivity=%u\n", ap->max_inactivity / HZ);
0077     seq_printf(m, "bridge_packets=%u\n", ap->bridge_packets);
0078     seq_printf(m, "nullfunc_ack=%u\n", ap->nullfunc_ack);
0079     seq_printf(m, "autom_ap_wds=%u\n", ap->autom_ap_wds);
0080     seq_printf(m, "auth_algs=%u\n", ap->local->auth_algs);
0081     seq_printf(m, "tx_drop_nonassoc=%u\n", ap->tx_drop_nonassoc);
0082     return 0;
0083 }
0084 #endif
0085
0086 static void ap_sta_hash_add(struct ap_data *ap, struct sta_info *sta)
0087 {
0088     sta->hnext = ap->sta_hash[STA_HASH(sta->addr)];
0089     ap->sta_hash[STA_HASH(sta->addr)] = sta;
0090 }
0091
0092 static void ap_sta_hash_del(struct ap_data *ap, struct sta_info *sta)
0093 {
0094     struct sta_info *s;
0095
0096     s = ap->sta_hash[STA_HASH(sta->addr)];
0097     if (s == NULL) return;
0098     if (ether_addr_equal(s->addr, sta->addr)) {
0099         ap->sta_hash[STA_HASH(sta->addr)] = s->hnext;
0100         return;
0101     }
0102
0103     while (s->hnext != NULL && !ether_addr_equal(s->hnext->addr, sta->addr))
0104         s = s->hnext;
0105     if (s->hnext != NULL)
0106         s->hnext = s->hnext->hnext;
0107     else
0108         printk("AP: could not remove STA %pM from hash table\n",
0109                sta->addr);
0110 }
0111
0112 static void ap_free_sta(struct ap_data *ap, struct sta_info *sta)
0113 {
0114     if (sta->ap && sta->local)
0115         hostap_event_expired_sta(sta->local->dev, sta);
0116
0117     if (ap->proc != NULL) {
0118         char name[20];
0119         sprintf(name, "%pM", sta->addr);
0120         remove_proc_entry(name, ap->proc);
0121     }
0122
0123     if (sta->crypt) {
0124         sta->crypt->ops->deinit(sta->crypt->priv);
0125         kfree(sta->crypt);
0126         sta->crypt = NULL;
0127     }
0128
0129     skb_queue_purge(&sta->tx_buf);
0130
0131     ap->num_sta--;
0132 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0133     if (sta->aid > 0)
0134         ap->sta_aid[sta->aid - 1] = NULL;
0135
0136     if (!sta->ap)
0137         kfree(sta->u.sta.challenge);
0138     del_timer_sync(&sta->timer);
0139 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0140
0141     kfree(sta);
0142 }
0143
0144
0145 static void hostap_set_tim(local_info_t *local, int aid, int set)
0146 {
0147     if (local->func->set_tim)
0148         local->func->set_tim(local->dev, aid, set);
0149 }
0150
0151
0152 static void hostap_event_new_sta(struct net_device *dev, struct sta_info *sta)
0153 {
0154     union iwreq_data wrqu;
0155     memset(&wrqu, 0, sizeof(wrqu));
0156     memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
0157     wrqu.addr.sa_family = ARPHRD_ETHER;
0158     wireless_send_event(dev, IWEVREGISTERED, &wrqu, NULL);
0159 }
0160
0161
0162 static void hostap_event_expired_sta(struct net_device *dev,
0163                      struct sta_info *sta)
0164 {
0165     union iwreq_data wrqu;
0166     memset(&wrqu, 0, sizeof(wrqu));
0167     memcpy(wrqu.addr.sa_data, sta->addr, ETH_ALEN);
0168     wrqu.addr.sa_family = ARPHRD_ETHER;
0169     wireless_send_event(dev, IWEVEXPIRED, &wrqu, NULL);
0170 }
0171
0172
0173 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0174
0175 static void ap_handle_timer(struct timer_list *t)
0176 {
0177     struct sta_info *sta = from_timer(sta, t, timer);
0178     local_info_t *local;
0179     struct ap_data *ap;
0180     unsigned long next_time = 0;
0181     int was_assoc;
0182
0183     if (sta == NULL || sta->local == NULL || sta->local->ap == NULL) {
0184         PDEBUG(DEBUG_AP, "ap_handle_timer() called with NULL data\n");
0185         return;
0186     }
0187
0188     local = sta->local;
0189     ap = local->ap;
0190     was_assoc = sta->flags & WLAN_STA_ASSOC;
0191
0192     if (atomic_read(&sta->users) != 0)
0193         next_time = jiffies + HZ;
0194     else if ((sta->flags & WLAN_STA_PERM) && !(sta->flags & WLAN_STA_AUTH))
0195         next_time = jiffies + ap->max_inactivity;
0196
0197     if (time_before(jiffies, sta->last_rx + ap->max_inactivity)) {
0198         /* station activity detected; reset timeout state */
0199         sta->timeout_next = STA_NULLFUNC;
0200         next_time = sta->last_rx + ap->max_inactivity;
0201     } else if (sta->timeout_next == STA_DISASSOC &&
0202            !(sta->flags & WLAN_STA_PENDING_POLL)) {
0203         /* STA ACKed data nullfunc frame poll */
0204         sta->timeout_next = STA_NULLFUNC;
0205         next_time = jiffies + ap->max_inactivity;
0206     }
0207
0208     if (next_time) {
0209         sta->timer.expires = next_time;
0210         add_timer(&sta->timer);
0211         return;
0212     }
0213
0214     if (sta->ap)
0215         sta->timeout_next = STA_DEAUTH;
0216
0217     if (sta->timeout_next == STA_DEAUTH && !(sta->flags & WLAN_STA_PERM)) {
0218         spin_lock(&ap->sta_table_lock);
0219         ap_sta_hash_del(ap, sta);
0220         list_del(&sta->list);
0221         spin_unlock(&ap->sta_table_lock);
0222         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
0223     } else if (sta->timeout_next == STA_DISASSOC)
0224         sta->flags &= ~WLAN_STA_ASSOC;
0225
0226     if (was_assoc && !(sta->flags & WLAN_STA_ASSOC) && !sta->ap)
0227         hostap_event_expired_sta(local->dev, sta);
0228
0229     if (sta->timeout_next == STA_DEAUTH && sta->aid > 0 &&
0230         !skb_queue_empty(&sta->tx_buf)) {
0231         hostap_set_tim(local, sta->aid, 0);
0232         sta->flags &= ~WLAN_STA_TIM;
0233     }
0234
0235     if (sta->ap) {
0236         if (ap->autom_ap_wds) {
0237             PDEBUG(DEBUG_AP, "%s: removing automatic WDS "
0238                    "connection to AP %pM\n",
0239                    local->dev->name, sta->addr);
0240             hostap_wds_link_oper(local, sta->addr, WDS_DEL);
0241         }
0242     } else if (sta->timeout_next == STA_NULLFUNC) {
0243         /* send data frame to poll STA and check whether this frame
0244          * is ACKed */
0245         /* FIX: IEEE80211_STYPE_NULLFUNC would be more appropriate, but
0246          * it is apparently not retried so TX Exc events are not
0247          * received for it */
0248         sta->flags |= WLAN_STA_PENDING_POLL;
0249         prism2_send_mgmt(local->dev, IEEE80211_FTYPE_DATA |
0250                  IEEE80211_STYPE_DATA, NULL, 0,
0251                  sta->addr, ap->tx_callback_poll);
0252     } else {
0253         int deauth = sta->timeout_next == STA_DEAUTH;
0254         __le16 resp;
0255         PDEBUG(DEBUG_AP, "%s: sending %s info to STA %pM"
0256                "(last=%lu, jiffies=%lu)\n",
0257                local->dev->name,
0258                deauth ? "deauthentication" : "disassociation",
0259                sta->addr, sta->last_rx, jiffies);
0260
0261         resp = cpu_to_le16(deauth ? WLAN_REASON_PREV_AUTH_NOT_VALID :
0262                    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
0263         prism2_send_mgmt(local->dev, IEEE80211_FTYPE_MGMT |
0264                  (deauth ? IEEE80211_STYPE_DEAUTH :
0265                   IEEE80211_STYPE_DISASSOC),
0266                  (char *) &resp, 2, sta->addr, 0);
0267     }
0268
0269     if (sta->timeout_next == STA_DEAUTH) {
0270         if (sta->flags & WLAN_STA_PERM) {
0271             PDEBUG(DEBUG_AP, "%s: STA %pM"
0272                    " would have been removed, "
0273                    "but it has 'perm' flag\n",
0274                    local->dev->name, sta->addr);
0275         } else
0276             ap_free_sta(ap, sta);
0277         return;
0278     }
0279
0280     if (sta->timeout_next == STA_NULLFUNC) {
0281         sta->timeout_next = STA_DISASSOC;
0282         sta->timer.expires = jiffies + AP_DISASSOC_DELAY;
0283     } else {
0284         sta->timeout_next = STA_DEAUTH;
0285         sta->timer.expires = jiffies + AP_DEAUTH_DELAY;
0286     }
0287
0288     add_timer(&sta->timer);
0289 }
0290
0291
0292 void hostap_deauth_all_stas(struct net_device *dev, struct ap_data *ap,
0293                 int resend)
0294 {
0295     u8 addr[ETH_ALEN];
0296     __le16 resp;
0297     int i;
0298
0299     PDEBUG(DEBUG_AP, "%s: Deauthenticate all stations\n", dev->name);
0300     eth_broadcast_addr(addr);
0301
0302     resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
0303
0304     /* deauth message sent; try to resend it few times; the message is
0305      * broadcast, so it may be delayed until next DTIM; there is not much
0306      * else we can do at this point since the driver is going to be shut
0307      * down */
0308     for (i = 0; i < 5; i++) {
0309         prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
0310                  IEEE80211_STYPE_DEAUTH,
0311                  (char *) &resp, 2, addr, 0);
0312
0313         if (!resend || ap->num_sta <= 0)
0314             return;
0315
0316         mdelay(50);
0317     }
0318 }
0319
0320
0321 static int ap_control_proc_show(struct seq_file *m, void *v)
0322 {
0323     struct ap_data *ap = pde_data(file_inode(m->file));
0324     char *policy_txt;
0325     struct mac_entry *entry;
0326
0327     if (v == SEQ_START_TOKEN) {
0328         switch (ap->mac_restrictions.policy) {
0329         case MAC_POLICY_OPEN:
0330             policy_txt = "open";
0331             break;
0332         case MAC_POLICY_ALLOW:
0333             policy_txt = "allow";
0334             break;
0335         case MAC_POLICY_DENY:
0336             policy_txt = "deny";
0337             break;
0338         default:
0339             policy_txt = "unknown";
0340             break;
0341         }
0342         seq_printf(m, "MAC policy: %s\n", policy_txt);
0343         seq_printf(m, "MAC entries: %u\n", ap->mac_restrictions.entries);
0344         seq_puts(m, "MAC list:\n");
0345         return 0;
0346     }
0347
0348     entry = v;
0349     seq_printf(m, "%pM\n", entry->addr);
0350     return 0;
0351 }
0352
0353 static void *ap_control_proc_start(struct seq_file *m, loff_t *_pos)
0354 {
0355     struct ap_data *ap = pde_data(file_inode(m->file));
0356     spin_lock_bh(&ap->mac_restrictions.lock);
0357     return seq_list_start_head(&ap->mac_restrictions.mac_list, *_pos);
0358 }
0359
0360 static void *ap_control_proc_next(struct seq_file *m, void *v, loff_t *_pos)
0361 {
0362     struct ap_data *ap = pde_data(file_inode(m->file));
0363     return seq_list_next(v, &ap->mac_restrictions.mac_list, _pos);
0364 }
0365
0366 static void ap_control_proc_stop(struct seq_file *m, void *v)
0367 {
0368     struct ap_data *ap = pde_data(file_inode(m->file));
0369     spin_unlock_bh(&ap->mac_restrictions.lock);
0370 }
0371
0372 static const struct seq_operations ap_control_proc_seqops = {
0373     .start  = ap_control_proc_start,
0374     .next   = ap_control_proc_next,
0375     .stop   = ap_control_proc_stop,
0376     .show   = ap_control_proc_show,
0377 };
0378
0379 int ap_control_add_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
0380 {
0381     struct mac_entry *entry;
0382
0383     entry = kmalloc(sizeof(struct mac_entry), GFP_KERNEL);
0384     if (entry == NULL)
0385         return -ENOMEM;
0386
0387     memcpy(entry->addr, mac, ETH_ALEN);
0388
0389     spin_lock_bh(&mac_restrictions->lock);
0390     list_add_tail(&entry->list, &mac_restrictions->mac_list);
0391     mac_restrictions->entries++;
0392     spin_unlock_bh(&mac_restrictions->lock);
0393
0394     return 0;
0395 }
0396
0397
0398 int ap_control_del_mac(struct mac_restrictions *mac_restrictions, u8 *mac)
0399 {
0400     struct list_head *ptr;
0401     struct mac_entry *entry;
0402
0403     spin_lock_bh(&mac_restrictions->lock);
0404     for (ptr = mac_restrictions->mac_list.next;
0405          ptr != &mac_restrictions->mac_list; ptr = ptr->next) {
0406         entry = list_entry(ptr, struct mac_entry, list);
0407
0408         if (ether_addr_equal(entry->addr, mac)) {
0409             list_del(ptr);
0410             kfree(entry);
0411             mac_restrictions->entries--;
0412             spin_unlock_bh(&mac_restrictions->lock);
0413             return 0;
0414         }
0415     }
0416     spin_unlock_bh(&mac_restrictions->lock);
0417     return -1;
0418 }
0419
0420
0421 static int ap_control_mac_deny(struct mac_restrictions *mac_restrictions,
0422                    u8 *mac)
0423 {
0424     struct mac_entry *entry;
0425     int found = 0;
0426
0427     if (mac_restrictions->policy == MAC_POLICY_OPEN)
0428         return 0;
0429
0430     spin_lock_bh(&mac_restrictions->lock);
0431     list_for_each_entry(entry, &mac_restrictions->mac_list, list) {
0432         if (ether_addr_equal(entry->addr, mac)) {
0433             found = 1;
0434             break;
0435         }
0436     }
0437     spin_unlock_bh(&mac_restrictions->lock);
0438
0439     if (mac_restrictions->policy == MAC_POLICY_ALLOW)
0440         return !found;
0441     else
0442         return found;
0443 }
0444
0445
0446 void ap_control_flush_macs(struct mac_restrictions *mac_restrictions)
0447 {
0448     struct list_head *ptr, *n;
0449     struct mac_entry *entry;
0450
0451     if (mac_restrictions->entries == 0)
0452         return;
0453
0454     spin_lock_bh(&mac_restrictions->lock);
0455     for (ptr = mac_restrictions->mac_list.next, n = ptr->next;
0456          ptr != &mac_restrictions->mac_list;
0457          ptr = n, n = ptr->next) {
0458         entry = list_entry(ptr, struct mac_entry, list);
0459         list_del(ptr);
0460         kfree(entry);
0461     }
0462     mac_restrictions->entries = 0;
0463     spin_unlock_bh(&mac_restrictions->lock);
0464 }
0465
0466
0467 int ap_control_kick_mac(struct ap_data *ap, struct net_device *dev, u8 *mac)
0468 {
0469     struct sta_info *sta;
0470     __le16 resp;
0471
0472     spin_lock_bh(&ap->sta_table_lock);
0473     sta = ap_get_sta(ap, mac);
0474     if (sta) {
0475         ap_sta_hash_del(ap, sta);
0476         list_del(&sta->list);
0477     }
0478     spin_unlock_bh(&ap->sta_table_lock);
0479
0480     if (!sta)
0481         return -EINVAL;
0482
0483     resp = cpu_to_le16(WLAN_REASON_PREV_AUTH_NOT_VALID);
0484     prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_DEAUTH,
0485              (char *) &resp, 2, sta->addr, 0);
0486
0487     if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
0488         hostap_event_expired_sta(dev, sta);
0489
0490     ap_free_sta(ap, sta);
0491
0492     return 0;
0493 }
0494
0495 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0496
0497
0498 void ap_control_kickall(struct ap_data *ap)
0499 {
0500     struct list_head *ptr, *n;
0501     struct sta_info *sta;
0502
0503     spin_lock_bh(&ap->sta_table_lock);
0504     for (ptr = ap->sta_list.next, n = ptr->next; ptr != &ap->sta_list;
0505          ptr = n, n = ptr->next) {
0506         sta = list_entry(ptr, struct sta_info, list);
0507         ap_sta_hash_del(ap, sta);
0508         list_del(&sta->list);
0509         if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
0510             hostap_event_expired_sta(sta->local->dev, sta);
0511         ap_free_sta(ap, sta);
0512     }
0513     spin_unlock_bh(&ap->sta_table_lock);
0514 }
0515
0516
0517 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0518
0519 static int prism2_ap_proc_show(struct seq_file *m, void *v)
0520 {
0521     struct sta_info *sta = v;
0522     int i;
0523
0524     if (v == SEQ_START_TOKEN) {
0525         seq_printf(m, "# BSSID CHAN SIGNAL NOISE RATE SSID FLAGS\n");
0526         return 0;
0527     }
0528
0529     if (!sta->ap)
0530         return 0;
0531
0532     seq_printf(m, "%pM %d %d %d %d '",
0533            sta->addr,
0534            sta->u.ap.channel, sta->last_rx_signal,
0535            sta->last_rx_silence, sta->last_rx_rate);
0536
0537     for (i = 0; i < sta->u.ap.ssid_len; i++) {
0538         if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
0539             seq_putc(m, sta->u.ap.ssid[i]);
0540         else
0541             seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
0542     }
0543
0544     seq_putc(m, '\'');
0545     if (sta->capability & WLAN_CAPABILITY_ESS)
0546         seq_puts(m, " [ESS]");
0547     if (sta->capability & WLAN_CAPABILITY_IBSS)
0548         seq_puts(m, " [IBSS]");
0549     if (sta->capability & WLAN_CAPABILITY_PRIVACY)
0550         seq_puts(m, " [WEP]");
0551     seq_putc(m, '\n');
0552     return 0;
0553 }
0554
0555 static void *prism2_ap_proc_start(struct seq_file *m, loff_t *_pos)
0556 {
0557     struct ap_data *ap = pde_data(file_inode(m->file));
0558     spin_lock_bh(&ap->sta_table_lock);
0559     return seq_list_start_head(&ap->sta_list, *_pos);
0560 }
0561
0562 static void *prism2_ap_proc_next(struct seq_file *m, void *v, loff_t *_pos)
0563 {
0564     struct ap_data *ap = pde_data(file_inode(m->file));
0565     return seq_list_next(v, &ap->sta_list, _pos);
0566 }
0567
0568 static void prism2_ap_proc_stop(struct seq_file *m, void *v)
0569 {
0570     struct ap_data *ap = pde_data(file_inode(m->file));
0571     spin_unlock_bh(&ap->sta_table_lock);
0572 }
0573
0574 static const struct seq_operations prism2_ap_proc_seqops = {
0575     .start  = prism2_ap_proc_start,
0576     .next   = prism2_ap_proc_next,
0577     .stop   = prism2_ap_proc_stop,
0578     .show   = prism2_ap_proc_show,
0579 };
0580 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0581
0582
0583 void hostap_check_sta_fw_version(struct ap_data *ap, int sta_fw_ver)
0584 {
0585     if (!ap)
0586         return;
0587
0588     if (sta_fw_ver == PRISM2_FW_VER(0,8,0)) {
0589         PDEBUG(DEBUG_AP, "Using data::nullfunc ACK workaround - "
0590                "firmware upgrade recommended\n");
0591         ap->nullfunc_ack = 1;
0592     } else
0593         ap->nullfunc_ack = 0;
0594
0595     if (sta_fw_ver == PRISM2_FW_VER(1,4,2)) {
0596         printk(KERN_WARNING "%s: Warning: secondary station firmware "
0597                "version 1.4.2 does not seem to work in Host AP mode\n",
0598                ap->local->dev->name);
0599     }
0600 }
0601
0602
0603 /* Called only as a tasklet (software IRQ) */
0604 static void hostap_ap_tx_cb(struct sk_buff *skb, int ok, void *data)
0605 {
0606     struct ap_data *ap = data;
0607     struct ieee80211_hdr *hdr;
0608
0609     if (!ap->local->hostapd || !ap->local->apdev) {
0610         dev_kfree_skb(skb);
0611         return;
0612     }
0613
0614     /* Pass the TX callback frame to the hostapd; use 802.11 header version
0615      * 1 to indicate failure (no ACK) and 2 success (frame ACKed) */
0616
0617     hdr = (struct ieee80211_hdr *) skb->data;
0618     hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_VERS);
0619     hdr->frame_control |= cpu_to_le16(ok ? BIT(1) : BIT(0));
0620
0621     skb->dev = ap->local->apdev;
0622     skb_pull(skb, hostap_80211_get_hdrlen(hdr->frame_control));
0623     skb->pkt_type = PACKET_OTHERHOST;
0624     skb->protocol = cpu_to_be16(ETH_P_802_2);
0625     memset(skb->cb, 0, sizeof(skb->cb));
0626     netif_rx(skb);
0627 }
0628
0629
0630 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0631 /* Called only as a tasklet (software IRQ) */
0632 static void hostap_ap_tx_cb_auth(struct sk_buff *skb, int ok, void *data)
0633 {
0634     struct ap_data *ap = data;
0635     struct net_device *dev = ap->local->dev;
0636     struct ieee80211_hdr *hdr;
0637     u16 auth_alg, auth_transaction, status;
0638     __le16 *pos;
0639     struct sta_info *sta = NULL;
0640     char *txt = NULL;
0641
0642     if (ap->local->hostapd) {
0643         dev_kfree_skb(skb);
0644         return;
0645     }
0646
0647     hdr = (struct ieee80211_hdr *) skb->data;
0648     if (!ieee80211_is_auth(hdr->frame_control) ||
0649         skb->len < IEEE80211_MGMT_HDR_LEN + 6) {
0650         printk(KERN_DEBUG "%s: hostap_ap_tx_cb_auth received invalid "
0651                "frame\n", dev->name);
0652         dev_kfree_skb(skb);
0653         return;
0654     }
0655
0656     pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
0657     auth_alg = le16_to_cpu(*pos++);
0658     auth_transaction = le16_to_cpu(*pos++);
0659     status = le16_to_cpu(*pos++);
0660
0661     if (!ok) {
0662         txt = "frame was not ACKed";
0663         goto done;
0664     }
0665
0666     spin_lock(&ap->sta_table_lock);
0667     sta = ap_get_sta(ap, hdr->addr1);
0668     if (sta)
0669         atomic_inc(&sta->users);
0670     spin_unlock(&ap->sta_table_lock);
0671
0672     if (!sta) {
0673         txt = "STA not found";
0674         goto done;
0675     }
0676
0677     if (status == WLAN_STATUS_SUCCESS &&
0678         ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 2) ||
0679          (auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 4))) {
0680         txt = "STA authenticated";
0681         sta->flags |= WLAN_STA_AUTH;
0682         sta->last_auth = jiffies;
0683     } else if (status != WLAN_STATUS_SUCCESS)
0684         txt = "authentication failed";
0685
0686  done:
0687     if (sta)
0688         atomic_dec(&sta->users);
0689     if (txt) {
0690         PDEBUG(DEBUG_AP, "%s: %pM auth_cb - alg=%d "
0691                "trans#=%d status=%d - %s\n",
0692                dev->name, hdr->addr1,
0693                auth_alg, auth_transaction, status, txt);
0694     }
0695     dev_kfree_skb(skb);
0696 }
0697
0698
0699 /* Called only as a tasklet (software IRQ) */
0700 static void hostap_ap_tx_cb_assoc(struct sk_buff *skb, int ok, void *data)
0701 {
0702     struct ap_data *ap = data;
0703     struct net_device *dev = ap->local->dev;
0704     struct ieee80211_hdr *hdr;
0705     u16 status;
0706     __le16 *pos;
0707     struct sta_info *sta = NULL;
0708     char *txt = NULL;
0709
0710     if (ap->local->hostapd) {
0711         dev_kfree_skb(skb);
0712         return;
0713     }
0714
0715     hdr = (struct ieee80211_hdr *) skb->data;
0716     if ((!ieee80211_is_assoc_resp(hdr->frame_control) &&
0717          !ieee80211_is_reassoc_resp(hdr->frame_control)) ||
0718         skb->len < IEEE80211_MGMT_HDR_LEN + 4) {
0719         printk(KERN_DEBUG "%s: hostap_ap_tx_cb_assoc received invalid "
0720                "frame\n", dev->name);
0721         dev_kfree_skb(skb);
0722         return;
0723     }
0724
0725     if (!ok) {
0726         txt = "frame was not ACKed";
0727         goto done;
0728     }
0729
0730     spin_lock(&ap->sta_table_lock);
0731     sta = ap_get_sta(ap, hdr->addr1);
0732     if (sta)
0733         atomic_inc(&sta->users);
0734     spin_unlock(&ap->sta_table_lock);
0735
0736     if (!sta) {
0737         txt = "STA not found";
0738         goto done;
0739     }
0740
0741     pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
0742     pos++;
0743     status = le16_to_cpu(*pos++);
0744     if (status == WLAN_STATUS_SUCCESS) {
0745         if (!(sta->flags & WLAN_STA_ASSOC))
0746             hostap_event_new_sta(dev, sta);
0747         txt = "STA associated";
0748         sta->flags |= WLAN_STA_ASSOC;
0749         sta->last_assoc = jiffies;
0750     } else
0751         txt = "association failed";
0752
0753  done:
0754     if (sta)
0755         atomic_dec(&sta->users);
0756     if (txt) {
0757         PDEBUG(DEBUG_AP, "%s: %pM assoc_cb - %s\n",
0758                dev->name, hdr->addr1, txt);
0759     }
0760     dev_kfree_skb(skb);
0761 }
0762
0763 /* Called only as a tasklet (software IRQ); TX callback for poll frames used
0764  * in verifying whether the STA is still present. */
0765 static void hostap_ap_tx_cb_poll(struct sk_buff *skb, int ok, void *data)
0766 {
0767     struct ap_data *ap = data;
0768     struct ieee80211_hdr *hdr;
0769     struct sta_info *sta;
0770
0771     if (skb->len < 24)
0772         goto fail;
0773     hdr = (struct ieee80211_hdr *) skb->data;
0774     if (ok) {
0775         spin_lock(&ap->sta_table_lock);
0776         sta = ap_get_sta(ap, hdr->addr1);
0777         if (sta)
0778             sta->flags &= ~WLAN_STA_PENDING_POLL;
0779         spin_unlock(&ap->sta_table_lock);
0780     } else {
0781         PDEBUG(DEBUG_AP,
0782                "%s: STA %pM did not ACK activity poll frame\n",
0783                ap->local->dev->name, hdr->addr1);
0784     }
0785
0786  fail:
0787     dev_kfree_skb(skb);
0788 }
0789 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0790
0791
0792 void hostap_init_data(local_info_t *local)
0793 {
0794     struct ap_data *ap = local->ap;
0795
0796     if (ap == NULL) {
0797         printk(KERN_WARNING "hostap_init_data: ap == NULL\n");
0798         return;
0799     }
0800     memset(ap, 0, sizeof(struct ap_data));
0801     ap->local = local;
0802
0803     ap->ap_policy = GET_INT_PARM(other_ap_policy, local->card_idx);
0804     ap->bridge_packets = GET_INT_PARM(ap_bridge_packets, local->card_idx);
0805     ap->max_inactivity =
0806         GET_INT_PARM(ap_max_inactivity, local->card_idx) * HZ;
0807     ap->autom_ap_wds = GET_INT_PARM(autom_ap_wds, local->card_idx);
0808
0809     spin_lock_init(&ap->sta_table_lock);
0810     INIT_LIST_HEAD(&ap->sta_list);
0811
0812     /* Initialize task queue structure for AP management */
0813     INIT_WORK(&local->ap->add_sta_proc_queue, handle_add_proc_queue);
0814
0815     ap->tx_callback_idx =
0816         hostap_tx_callback_register(local, hostap_ap_tx_cb, ap);
0817     if (ap->tx_callback_idx == 0)
0818         printk(KERN_WARNING "%s: failed to register TX callback for "
0819                "AP\n", local->dev->name);
0820 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0821     INIT_WORK(&local->ap->wds_oper_queue, handle_wds_oper_queue);
0822
0823     ap->tx_callback_auth =
0824         hostap_tx_callback_register(local, hostap_ap_tx_cb_auth, ap);
0825     ap->tx_callback_assoc =
0826         hostap_tx_callback_register(local, hostap_ap_tx_cb_assoc, ap);
0827     ap->tx_callback_poll =
0828         hostap_tx_callback_register(local, hostap_ap_tx_cb_poll, ap);
0829     if (ap->tx_callback_auth == 0 || ap->tx_callback_assoc == 0 ||
0830         ap->tx_callback_poll == 0)
0831         printk(KERN_WARNING "%s: failed to register TX callback for "
0832                "AP\n", local->dev->name);
0833
0834     spin_lock_init(&ap->mac_restrictions.lock);
0835     INIT_LIST_HEAD(&ap->mac_restrictions.mac_list);
0836 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0837
0838     ap->initialized = 1;
0839 }
0840
0841
0842 void hostap_init_ap_proc(local_info_t *local)
0843 {
0844     struct ap_data *ap = local->ap;
0845
0846     ap->proc = local->proc;
0847     if (ap->proc == NULL)
0848         return;
0849
0850 #ifndef PRISM2_NO_PROCFS_DEBUG
0851     proc_create_single_data("ap_debug", 0, ap->proc, ap_debug_proc_show, ap);
0852 #endif /* PRISM2_NO_PROCFS_DEBUG */
0853
0854 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0855     proc_create_seq_data("ap_control", 0, ap->proc, &ap_control_proc_seqops,
0856             ap);
0857     proc_create_seq_data("ap", 0, ap->proc, &prism2_ap_proc_seqops, ap);
0858 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0859
0860 }
0861
0862
0863 void hostap_free_data(struct ap_data *ap)
0864 {
0865     struct sta_info *n, *sta;
0866
0867     if (ap == NULL || !ap->initialized) {
0868         printk(KERN_DEBUG "hostap_free_data: ap has not yet been "
0869                "initialized - skip resource freeing\n");
0870         return;
0871     }
0872
0873     flush_work(&ap->add_sta_proc_queue);
0874
0875 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0876     flush_work(&ap->wds_oper_queue);
0877     if (ap->crypt)
0878         ap->crypt->deinit(ap->crypt_priv);
0879     ap->crypt = ap->crypt_priv = NULL;
0880 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0881
0882     list_for_each_entry_safe(sta, n, &ap->sta_list, list) {
0883         ap_sta_hash_del(ap, sta);
0884         list_del(&sta->list);
0885         if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
0886             hostap_event_expired_sta(sta->local->dev, sta);
0887         ap_free_sta(ap, sta);
0888     }
0889
0890 #ifndef PRISM2_NO_PROCFS_DEBUG
0891     if (ap->proc != NULL) {
0892         remove_proc_entry("ap_debug", ap->proc);
0893     }
0894 #endif /* PRISM2_NO_PROCFS_DEBUG */
0895
0896 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0897     if (ap->proc != NULL) {
0898       remove_proc_entry("ap", ap->proc);
0899         remove_proc_entry("ap_control", ap->proc);
0900     }
0901     ap_control_flush_macs(&ap->mac_restrictions);
0902 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0903
0904     ap->initialized = 0;
0905 }
0906
0907
0908 /* caller should have mutex for AP STA list handling */
0909 static struct sta_info* ap_get_sta(struct ap_data *ap, u8 *sta)
0910 {
0911     struct sta_info *s;
0912
0913     s = ap->sta_hash[STA_HASH(sta)];
0914     while (s != NULL && !ether_addr_equal(s->addr, sta))
0915         s = s->hnext;
0916     return s;
0917 }
0918
0919
0920 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
0921
0922 /* Called from timer handler and from scheduled AP queue handlers */
0923 static void prism2_send_mgmt(struct net_device *dev,
0924                  u16 type_subtype, char *body,
0925                  int body_len, u8 *addr, u16 tx_cb_idx)
0926 {
0927     struct hostap_interface *iface;
0928     local_info_t *local;
0929     struct ieee80211_hdr *hdr;
0930     u16 fc;
0931     struct sk_buff *skb;
0932     struct hostap_skb_tx_data *meta;
0933     int hdrlen;
0934
0935     iface = netdev_priv(dev);
0936     local = iface->local;
0937     dev = local->dev; /* always use master radio device */
0938     iface = netdev_priv(dev);
0939
0940     if (!(dev->flags & IFF_UP)) {
0941         PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt - device is not UP - "
0942                "cannot send frame\n", dev->name);
0943         return;
0944     }
0945
0946     skb = dev_alloc_skb(sizeof(*hdr) + body_len);
0947     if (skb == NULL) {
0948         PDEBUG(DEBUG_AP, "%s: prism2_send_mgmt failed to allocate "
0949                "skb\n", dev->name);
0950         return;
0951     }
0952
0953     fc = type_subtype;
0954     hdrlen = hostap_80211_get_hdrlen(cpu_to_le16(type_subtype));
0955     hdr = skb_put_zero(skb, hdrlen);
0956     if (body)
0957         skb_put_data(skb, body, body_len);
0958
0959     /* FIX: ctrl::ack sending used special HFA384X_TX_CTRL_802_11
0960      * tx_control instead of using local->tx_control */
0961
0962
0963     memcpy(hdr->addr1, addr, ETH_ALEN); /* DA / RA */
0964     if (ieee80211_is_data(hdr->frame_control)) {
0965         fc |= IEEE80211_FCTL_FROMDS;
0966         memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* BSSID */
0967         memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* SA */
0968     } else if (ieee80211_is_ctl(hdr->frame_control)) {
0969         /* control:ACK does not have addr2 or addr3 */
0970         eth_zero_addr(hdr->addr2);
0971         eth_zero_addr(hdr->addr3);
0972     } else {
0973         memcpy(hdr->addr2, dev->dev_addr, ETH_ALEN); /* SA */
0974         memcpy(hdr->addr3, dev->dev_addr, ETH_ALEN); /* BSSID */
0975     }
0976
0977     hdr->frame_control = cpu_to_le16(fc);
0978
0979     meta = (struct hostap_skb_tx_data *) skb->cb;
0980     memset(meta, 0, sizeof(*meta));
0981     meta->magic = HOSTAP_SKB_TX_DATA_MAGIC;
0982     meta->iface = iface;
0983     meta->tx_cb_idx = tx_cb_idx;
0984
0985     skb->dev = dev;
0986     skb_reset_mac_header(skb);
0987     skb_reset_network_header(skb);
0988     dev_queue_xmit(skb);
0989 }
0990 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
0991
0992 #ifdef CONFIG_PROC_FS
0993 static int prism2_sta_proc_show(struct seq_file *m, void *v)
0994 {
0995     struct sta_info *sta = m->private;
0996     int i;
0997
0998     /* FIX: possible race condition.. the STA data could have just expired,
0999      * but proc entry was still here so that the read could have started;
1000      * some locking should be done here.. */
1001
1002     seq_printf(m,
1003            "%s=%pM\nusers=%d\naid=%d\n"
1004            "flags=0x%04x%s%s%s%s%s%s%s\n"
1005            "capability=0x%02x\nlisten_interval=%d\nsupported_rates=",
1006            sta->ap ? "AP" : "STA",
1007            sta->addr, atomic_read(&sta->users), sta->aid,
1008            sta->flags,
1009            sta->flags & WLAN_STA_AUTH ? " AUTH" : "",
1010            sta->flags & WLAN_STA_ASSOC ? " ASSOC" : "",
1011            sta->flags & WLAN_STA_PS ? " PS" : "",
1012            sta->flags & WLAN_STA_TIM ? " TIM" : "",
1013            sta->flags & WLAN_STA_PERM ? " PERM" : "",
1014            sta->flags & WLAN_STA_AUTHORIZED ? " AUTHORIZED" : "",
1015            sta->flags & WLAN_STA_PENDING_POLL ? " POLL" : "",
1016            sta->capability, sta->listen_interval);
1017     /* supported_rates: 500 kbit/s units with msb ignored */
1018     for (i = 0; i < sizeof(sta->supported_rates); i++)
1019         if (sta->supported_rates[i] != 0)
1020             seq_printf(m, "%d%sMbps ",
1021                    (sta->supported_rates[i] & 0x7f) / 2,
1022                    sta->supported_rates[i] & 1 ? ".5" : "");
1023     seq_printf(m,
1024            "\njiffies=%lu\nlast_auth=%lu\nlast_assoc=%lu\n"
1025            "last_rx=%lu\nlast_tx=%lu\nrx_packets=%lu\n"
1026            "tx_packets=%lu\n"
1027            "rx_bytes=%lu\ntx_bytes=%lu\nbuffer_count=%d\n"
1028            "last_rx: silence=%d dBm signal=%d dBm rate=%d%s Mbps\n"
1029            "tx_rate=%d\ntx[1M]=%d\ntx[2M]=%d\ntx[5.5M]=%d\n"
1030            "tx[11M]=%d\n"
1031            "rx[1M]=%d\nrx[2M]=%d\nrx[5.5M]=%d\nrx[11M]=%d\n",
1032            jiffies, sta->last_auth, sta->last_assoc, sta->last_rx,
1033            sta->last_tx,
1034            sta->rx_packets, sta->tx_packets, sta->rx_bytes,
1035            sta->tx_bytes, skb_queue_len(&sta->tx_buf),
1036            sta->last_rx_silence,
1037            sta->last_rx_signal, sta->last_rx_rate / 10,
1038            sta->last_rx_rate % 10 ? ".5" : "",
1039            sta->tx_rate, sta->tx_count[0], sta->tx_count[1],
1040            sta->tx_count[2], sta->tx_count[3],  sta->rx_count[0],
1041            sta->rx_count[1], sta->rx_count[2], sta->rx_count[3]);
1042     if (sta->crypt && sta->crypt->ops && sta->crypt->ops->print_stats)
1043         sta->crypt->ops->print_stats(m, sta->crypt->priv);
1044 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1045     if (sta->ap) {
1046         if (sta->u.ap.channel >= 0)
1047             seq_printf(m, "channel=%d\n", sta->u.ap.channel);
1048         seq_puts(m, "ssid=");
1049         for (i = 0; i < sta->u.ap.ssid_len; i++) {
1050             if (sta->u.ap.ssid[i] >= 32 && sta->u.ap.ssid[i] < 127)
1051                 seq_putc(m, sta->u.ap.ssid[i]);
1052             else
1053                 seq_printf(m, "<%02x>", sta->u.ap.ssid[i]);
1054         }
1055         seq_putc(m, '\n');
1056     }
1057 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1058
1059     return 0;
1060 }
1061 #endif
1062
1063 static void handle_add_proc_queue(struct work_struct *work)
1064 {
1065     struct ap_data *ap = container_of(work, struct ap_data,
1066                       add_sta_proc_queue);
1067     struct sta_info *sta;
1068     char name[20];
1069     struct add_sta_proc_data *entry, *prev;
1070
1071     entry = ap->add_sta_proc_entries;
1072     ap->add_sta_proc_entries = NULL;
1073
1074     while (entry) {
1075         spin_lock_bh(&ap->sta_table_lock);
1076         sta = ap_get_sta(ap, entry->addr);
1077         if (sta)
1078             atomic_inc(&sta->users);
1079         spin_unlock_bh(&ap->sta_table_lock);
1080
1081         if (sta) {
1082             sprintf(name, "%pM", sta->addr);
1083             sta->proc = proc_create_single_data(
1084                 name, 0, ap->proc,
1085                 prism2_sta_proc_show, sta);
1086
1087             atomic_dec(&sta->users);
1088         }
1089
1090         prev = entry;
1091         entry = entry->next;
1092         kfree(prev);
1093     }
1094 }
1095
1096
1097 static struct sta_info * ap_add_sta(struct ap_data *ap, u8 *addr)
1098 {
1099     struct sta_info *sta;
1100
1101     sta = kzalloc(sizeof(struct sta_info), GFP_ATOMIC);
1102     if (sta == NULL) {
1103         PDEBUG(DEBUG_AP, "AP: kmalloc failed\n");
1104         return NULL;
1105     }
1106
1107     /* initialize STA info data */
1108     sta->local = ap->local;
1109     skb_queue_head_init(&sta->tx_buf);
1110     memcpy(sta->addr, addr, ETH_ALEN);
1111
1112     atomic_inc(&sta->users);
1113     spin_lock_bh(&ap->sta_table_lock);
1114     list_add(&sta->list, &ap->sta_list);
1115     ap->num_sta++;
1116     ap_sta_hash_add(ap, sta);
1117     spin_unlock_bh(&ap->sta_table_lock);
1118
1119     if (ap->proc) {
1120         struct add_sta_proc_data *entry;
1121         /* schedule a non-interrupt context process to add a procfs
1122          * entry for the STA since procfs code use GFP_KERNEL */
1123         entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
1124         if (entry) {
1125             memcpy(entry->addr, sta->addr, ETH_ALEN);
1126             entry->next = ap->add_sta_proc_entries;
1127             ap->add_sta_proc_entries = entry;
1128             schedule_work(&ap->add_sta_proc_queue);
1129         } else
1130             printk(KERN_DEBUG "Failed to add STA proc data\n");
1131     }
1132
1133 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1134     timer_setup(&sta->timer, ap_handle_timer, 0);
1135     sta->timer.expires = jiffies + ap->max_inactivity;
1136     if (!ap->local->hostapd)
1137         add_timer(&sta->timer);
1138 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1139
1140     return sta;
1141 }
1142
1143
1144 static int ap_tx_rate_ok(int rateidx, struct sta_info *sta,
1145              local_info_t *local)
1146 {
1147     if (rateidx > sta->tx_max_rate ||
1148         !(sta->tx_supp_rates & (1 << rateidx)))
1149         return 0;
1150
1151     if (local->tx_rate_control != 0 &&
1152         !(local->tx_rate_control & (1 << rateidx)))
1153         return 0;
1154
1155     return 1;
1156 }
1157
1158
1159 static void prism2_check_tx_rates(struct sta_info *sta)
1160 {
1161     int i;
1162
1163     sta->tx_supp_rates = 0;
1164     for (i = 0; i < sizeof(sta->supported_rates); i++) {
1165         if ((sta->supported_rates[i] & 0x7f) == 2)
1166             sta->tx_supp_rates |= WLAN_RATE_1M;
1167         if ((sta->supported_rates[i] & 0x7f) == 4)
1168             sta->tx_supp_rates |= WLAN_RATE_2M;
1169         if ((sta->supported_rates[i] & 0x7f) == 11)
1170             sta->tx_supp_rates |= WLAN_RATE_5M5;
1171         if ((sta->supported_rates[i] & 0x7f) == 22)
1172             sta->tx_supp_rates |= WLAN_RATE_11M;
1173     }
1174     sta->tx_max_rate = sta->tx_rate = sta->tx_rate_idx = 0;
1175     if (sta->tx_supp_rates & WLAN_RATE_1M) {
1176         sta->tx_max_rate = 0;
1177         if (ap_tx_rate_ok(0, sta, sta->local)) {
1178             sta->tx_rate = 10;
1179             sta->tx_rate_idx = 0;
1180         }
1181     }
1182     if (sta->tx_supp_rates & WLAN_RATE_2M) {
1183         sta->tx_max_rate = 1;
1184         if (ap_tx_rate_ok(1, sta, sta->local)) {
1185             sta->tx_rate = 20;
1186             sta->tx_rate_idx = 1;
1187         }
1188     }
1189     if (sta->tx_supp_rates & WLAN_RATE_5M5) {
1190         sta->tx_max_rate = 2;
1191         if (ap_tx_rate_ok(2, sta, sta->local)) {
1192             sta->tx_rate = 55;
1193             sta->tx_rate_idx = 2;
1194         }
1195     }
1196     if (sta->tx_supp_rates & WLAN_RATE_11M) {
1197         sta->tx_max_rate = 3;
1198         if (ap_tx_rate_ok(3, sta, sta->local)) {
1199             sta->tx_rate = 110;
1200             sta->tx_rate_idx = 3;
1201         }
1202     }
1203 }
1204
1205
1206 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1207
1208 static void ap_crypt_init(struct ap_data *ap)
1209 {
1210     ap->crypt = lib80211_get_crypto_ops("WEP");
1211
1212     if (ap->crypt) {
1213         if (ap->crypt->init) {
1214             ap->crypt_priv = ap->crypt->init(0);
1215             if (ap->crypt_priv == NULL)
1216                 ap->crypt = NULL;
1217             else {
1218                 u8 key[WEP_KEY_LEN];
1219                 get_random_bytes(key, WEP_KEY_LEN);
1220                 ap->crypt->set_key(key, WEP_KEY_LEN, NULL,
1221                            ap->crypt_priv);
1222             }
1223         }
1224     }
1225
1226     if (ap->crypt == NULL) {
1227         printk(KERN_WARNING "AP could not initialize WEP: load module "
1228                "lib80211_crypt_wep.ko\n");
1229     }
1230 }
1231
1232
1233 /* Generate challenge data for shared key authentication. IEEE 802.11 specifies
1234  * that WEP algorithm is used for generating challenge. This should be unique,
1235  * but otherwise there is not really need for randomness etc. Initialize WEP
1236  * with pseudo random key and then use increasing IV to get unique challenge
1237  * streams.
1238  *
1239  * Called only as a scheduled task for pending AP frames.
1240  */
1241 static char * ap_auth_make_challenge(struct ap_data *ap)
1242 {
1243     char *tmpbuf;
1244     struct sk_buff *skb;
1245
1246     if (ap->crypt == NULL) {
1247         ap_crypt_init(ap);
1248         if (ap->crypt == NULL)
1249             return NULL;
1250     }
1251
1252     tmpbuf = kmalloc(WLAN_AUTH_CHALLENGE_LEN, GFP_ATOMIC);
1253     if (tmpbuf == NULL) {
1254         PDEBUG(DEBUG_AP, "AP: kmalloc failed for challenge\n");
1255         return NULL;
1256     }
1257
1258     skb = dev_alloc_skb(WLAN_AUTH_CHALLENGE_LEN +
1259                 ap->crypt->extra_mpdu_prefix_len +
1260                 ap->crypt->extra_mpdu_postfix_len);
1261     if (skb == NULL) {
1262         kfree(tmpbuf);
1263         return NULL;
1264     }
1265
1266     skb_reserve(skb, ap->crypt->extra_mpdu_prefix_len);
1267     skb_put_zero(skb, WLAN_AUTH_CHALLENGE_LEN);
1268     if (ap->crypt->encrypt_mpdu(skb, 0, ap->crypt_priv)) {
1269         dev_kfree_skb(skb);
1270         kfree(tmpbuf);
1271         return NULL;
1272     }
1273
1274     skb_copy_from_linear_data_offset(skb, ap->crypt->extra_mpdu_prefix_len,
1275                      tmpbuf, WLAN_AUTH_CHALLENGE_LEN);
1276     dev_kfree_skb(skb);
1277
1278     return tmpbuf;
1279 }
1280
1281
1282 /* Called only as a scheduled task for pending AP frames. */
1283 static void handle_authen(local_info_t *local, struct sk_buff *skb,
1284               struct hostap_80211_rx_status *rx_stats)
1285 {
1286     struct net_device *dev = local->dev;
1287     struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1288     size_t hdrlen;
1289     struct ap_data *ap = local->ap;
1290     char body[8 + WLAN_AUTH_CHALLENGE_LEN], *challenge = NULL;
1291     int len, olen;
1292     u16 auth_alg, auth_transaction, status_code;
1293     __le16 *pos;
1294     u16 resp = WLAN_STATUS_SUCCESS;
1295     struct sta_info *sta = NULL;
1296     struct lib80211_crypt_data *crypt;
1297     char *txt = "";
1298
1299     len = skb->len - IEEE80211_MGMT_HDR_LEN;
1300
1301     hdrlen = hostap_80211_get_hdrlen(hdr->frame_control);
1302
1303     if (len < 6) {
1304         PDEBUG(DEBUG_AP, "%s: handle_authen - too short payload "
1305                "(len=%d) from %pM\n", dev->name, len, hdr->addr2);
1306         return;
1307     }
1308
1309     spin_lock_bh(&local->ap->sta_table_lock);
1310     sta = ap_get_sta(local->ap, hdr->addr2);
1311     if (sta)
1312         atomic_inc(&sta->users);
1313     spin_unlock_bh(&local->ap->sta_table_lock);
1314
1315     if (sta && sta->crypt)
1316         crypt = sta->crypt;
1317     else {
1318         int idx = 0;
1319         if (skb->len >= hdrlen + 3)
1320             idx = skb->data[hdrlen + 3] >> 6;
1321         crypt = local->crypt_info.crypt[idx];
1322     }
1323
1324     pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1325     auth_alg = __le16_to_cpu(*pos);
1326     pos++;
1327     auth_transaction = __le16_to_cpu(*pos);
1328     pos++;
1329     status_code = __le16_to_cpu(*pos);
1330     pos++;
1331
1332     if (ether_addr_equal(dev->dev_addr, hdr->addr2) ||
1333         ap_control_mac_deny(&ap->mac_restrictions, hdr->addr2)) {
1334         txt = "authentication denied";
1335         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1336         goto fail;
1337     }
1338
1339     if (((local->auth_algs & PRISM2_AUTH_OPEN) &&
1340          auth_alg == WLAN_AUTH_OPEN) ||
1341         ((local->auth_algs & PRISM2_AUTH_SHARED_KEY) &&
1342          crypt && auth_alg == WLAN_AUTH_SHARED_KEY)) {
1343     } else {
1344         txt = "unsupported algorithm";
1345         resp = WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG;
1346         goto fail;
1347     }
1348
1349     if (len >= 8) {
1350         u8 *u = (u8 *) pos;
1351         if (*u == WLAN_EID_CHALLENGE) {
1352             if (*(u + 1) != WLAN_AUTH_CHALLENGE_LEN) {
1353                 txt = "invalid challenge len";
1354                 resp = WLAN_STATUS_CHALLENGE_FAIL;
1355                 goto fail;
1356             }
1357             if (len - 8 < WLAN_AUTH_CHALLENGE_LEN) {
1358                 txt = "challenge underflow";
1359                 resp = WLAN_STATUS_CHALLENGE_FAIL;
1360                 goto fail;
1361             }
1362             challenge = (char *) (u + 2);
1363         }
1364     }
1365
1366     if (sta && sta->ap) {
1367         if (time_after(jiffies, sta->u.ap.last_beacon +
1368                    (10 * sta->listen_interval * HZ) / 1024)) {
1369             PDEBUG(DEBUG_AP, "%s: no beacons received for a while,"
1370                    " assuming AP %pM is now STA\n",
1371                    dev->name, sta->addr);
1372             sta->ap = 0;
1373             sta->flags = 0;
1374             sta->u.sta.challenge = NULL;
1375         } else {
1376             txt = "AP trying to authenticate?";
1377             resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1378             goto fail;
1379         }
1380     }
1381
1382     if ((auth_alg == WLAN_AUTH_OPEN && auth_transaction == 1) ||
1383         (auth_alg == WLAN_AUTH_SHARED_KEY &&
1384          (auth_transaction == 1 ||
1385           (auth_transaction == 3 && sta != NULL &&
1386            sta->u.sta.challenge != NULL)))) {
1387     } else {
1388         txt = "unknown authentication transaction number";
1389         resp = WLAN_STATUS_UNKNOWN_AUTH_TRANSACTION;
1390         goto fail;
1391     }
1392
1393     if (sta == NULL) {
1394         txt = "new STA";
1395
1396         if (local->ap->num_sta >= MAX_STA_COUNT) {
1397             /* FIX: might try to remove some old STAs first? */
1398             txt = "no more room for new STAs";
1399             resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1400             goto fail;
1401         }
1402
1403         sta = ap_add_sta(local->ap, hdr->addr2);
1404         if (sta == NULL) {
1405             txt = "ap_add_sta failed";
1406             resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1407             goto fail;
1408         }
1409     }
1410
1411     switch (auth_alg) {
1412     case WLAN_AUTH_OPEN:
1413         txt = "authOK";
1414         /* IEEE 802.11 standard is not completely clear about
1415          * whether STA is considered authenticated after
1416          * authentication OK frame has been send or after it
1417          * has been ACKed. In order to reduce interoperability
1418          * issues, mark the STA authenticated before ACK. */
1419         sta->flags |= WLAN_STA_AUTH;
1420         break;
1421
1422     case WLAN_AUTH_SHARED_KEY:
1423         if (auth_transaction == 1) {
1424             if (sta->u.sta.challenge == NULL) {
1425                 sta->u.sta.challenge =
1426                     ap_auth_make_challenge(local->ap);
1427                 if (sta->u.sta.challenge == NULL) {
1428                     resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1429                     goto fail;
1430                 }
1431             }
1432         } else {
1433             if (sta->u.sta.challenge == NULL ||
1434                 challenge == NULL ||
1435                 memcmp(sta->u.sta.challenge, challenge,
1436                    WLAN_AUTH_CHALLENGE_LEN) != 0 ||
1437                 !ieee80211_has_protected(hdr->frame_control)) {
1438                 txt = "challenge response incorrect";
1439                 resp = WLAN_STATUS_CHALLENGE_FAIL;
1440                 goto fail;
1441             }
1442
1443             txt = "challenge OK - authOK";
1444             /* IEEE 802.11 standard is not completely clear about
1445              * whether STA is considered authenticated after
1446              * authentication OK frame has been send or after it
1447              * has been ACKed. In order to reduce interoperability
1448              * issues, mark the STA authenticated before ACK. */
1449             sta->flags |= WLAN_STA_AUTH;
1450             kfree(sta->u.sta.challenge);
1451             sta->u.sta.challenge = NULL;
1452         }
1453         break;
1454     }
1455
1456  fail:
1457     pos = (__le16 *) body;
1458     *pos = cpu_to_le16(auth_alg);
1459     pos++;
1460     *pos = cpu_to_le16(auth_transaction + 1);
1461     pos++;
1462     *pos = cpu_to_le16(resp); /* status_code */
1463     pos++;
1464     olen = 6;
1465
1466     if (resp == WLAN_STATUS_SUCCESS && sta != NULL &&
1467         sta->u.sta.challenge != NULL &&
1468         auth_alg == WLAN_AUTH_SHARED_KEY && auth_transaction == 1) {
1469         u8 *tmp = (u8 *) pos;
1470         *tmp++ = WLAN_EID_CHALLENGE;
1471         *tmp++ = WLAN_AUTH_CHALLENGE_LEN;
1472         pos++;
1473         memcpy(pos, sta->u.sta.challenge, WLAN_AUTH_CHALLENGE_LEN);
1474         olen += 2 + WLAN_AUTH_CHALLENGE_LEN;
1475     }
1476
1477     prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH,
1478              body, olen, hdr->addr2, ap->tx_callback_auth);
1479
1480     if (sta) {
1481         sta->last_rx = jiffies;
1482         atomic_dec(&sta->users);
1483     }
1484
1485     if (resp) {
1486         PDEBUG(DEBUG_AP, "%s: %pM auth (alg=%d "
1487                "trans#=%d stat=%d len=%d fc=%04x) ==> %d (%s)\n",
1488                dev->name, hdr->addr2,
1489                auth_alg, auth_transaction, status_code, len,
1490                le16_to_cpu(hdr->frame_control), resp, txt);
1491     }
1492 }
1493
1494
1495 /* Called only as a scheduled task for pending AP frames. */
1496 static void handle_assoc(local_info_t *local, struct sk_buff *skb,
1497              struct hostap_80211_rx_status *rx_stats, int reassoc)
1498 {
1499     struct net_device *dev = local->dev;
1500     struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1501     char body[12], *p, *lpos;
1502     int len, left;
1503     __le16 *pos;
1504     u16 resp = WLAN_STATUS_SUCCESS;
1505     struct sta_info *sta = NULL;
1506     int send_deauth = 0;
1507     char __always_unused *txt = "";
1508     u8 prev_ap[ETH_ALEN];
1509
1510     left = len = skb->len - IEEE80211_MGMT_HDR_LEN;
1511
1512     if (len < (reassoc ? 10 : 4)) {
1513         PDEBUG(DEBUG_AP, "%s: handle_assoc - too short payload "
1514                "(len=%d, reassoc=%d) from %pM\n",
1515                dev->name, len, reassoc, hdr->addr2);
1516         return;
1517     }
1518
1519     spin_lock_bh(&local->ap->sta_table_lock);
1520     sta = ap_get_sta(local->ap, hdr->addr2);
1521     if (sta == NULL || (sta->flags & WLAN_STA_AUTH) == 0) {
1522         spin_unlock_bh(&local->ap->sta_table_lock);
1523         txt = "trying to associate before authentication";
1524         send_deauth = 1;
1525         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1526         sta = NULL; /* do not decrement sta->users */
1527         goto fail;
1528     }
1529     atomic_inc(&sta->users);
1530     spin_unlock_bh(&local->ap->sta_table_lock);
1531
1532     pos = (__le16 *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1533     sta->capability = __le16_to_cpu(*pos);
1534     pos++; left -= 2;
1535     sta->listen_interval = __le16_to_cpu(*pos);
1536     pos++; left -= 2;
1537
1538     if (reassoc) {
1539         memcpy(prev_ap, pos, ETH_ALEN);
1540         pos++; pos++; pos++; left -= 6;
1541     } else
1542         eth_zero_addr(prev_ap);
1543
1544     if (left >= 2) {
1545         unsigned int ileft;
1546         unsigned char *u = (unsigned char *) pos;
1547
1548         if (*u == WLAN_EID_SSID) {
1549             u++; left--;
1550             ileft = *u;
1551             u++; left--;
1552
1553             if (ileft > left || ileft > MAX_SSID_LEN) {
1554                 txt = "SSID overflow";
1555                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1556                 goto fail;
1557             }
1558
1559             if (ileft != strlen(local->essid) ||
1560                 memcmp(local->essid, u, ileft) != 0) {
1561                 txt = "not our SSID";
1562                 resp = WLAN_STATUS_ASSOC_DENIED_UNSPEC;
1563                 goto fail;
1564             }
1565
1566             u += ileft;
1567             left -= ileft;
1568         }
1569
1570         if (left >= 2 && *u == WLAN_EID_SUPP_RATES) {
1571             u++; left--;
1572             ileft = *u;
1573             u++; left--;
1574
1575             if (ileft > left || ileft == 0 ||
1576                 ileft > WLAN_SUPP_RATES_MAX) {
1577                 txt = "SUPP_RATES len error";
1578                 resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1579                 goto fail;
1580             }
1581
1582             memset(sta->supported_rates, 0,
1583                    sizeof(sta->supported_rates));
1584             memcpy(sta->supported_rates, u, ileft);
1585             prism2_check_tx_rates(sta);
1586
1587             u += ileft;
1588             left -= ileft;
1589         }
1590
1591         if (left > 0) {
1592             PDEBUG(DEBUG_AP, "%s: assoc from %pM"
1593                    " with extra data (%d bytes) [",
1594                    dev->name, hdr->addr2, left);
1595             while (left > 0) {
1596                 PDEBUG2(DEBUG_AP, "<%02x>", *u);
1597                 u++; left--;
1598             }
1599             PDEBUG2(DEBUG_AP, "]\n");
1600         }
1601     } else {
1602         txt = "frame underflow";
1603         resp = WLAN_STATUS_UNSPECIFIED_FAILURE;
1604         goto fail;
1605     }
1606
1607     /* get a unique AID */
1608     if (sta->aid > 0)
1609         txt = "OK, old AID";
1610     else {
1611         spin_lock_bh(&local->ap->sta_table_lock);
1612         for (sta->aid = 1; sta->aid <= MAX_AID_TABLE_SIZE; sta->aid++)
1613             if (local->ap->sta_aid[sta->aid - 1] == NULL)
1614                 break;
1615         if (sta->aid > MAX_AID_TABLE_SIZE) {
1616             sta->aid = 0;
1617             spin_unlock_bh(&local->ap->sta_table_lock);
1618             resp = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
1619             txt = "no room for more AIDs";
1620         } else {
1621             local->ap->sta_aid[sta->aid - 1] = sta;
1622             spin_unlock_bh(&local->ap->sta_table_lock);
1623             txt = "OK, new AID";
1624         }
1625     }
1626
1627  fail:
1628     pos = (__le16 *) body;
1629
1630     if (send_deauth) {
1631         *pos = cpu_to_le16(WLAN_REASON_STA_REQ_ASSOC_WITHOUT_AUTH);
1632         pos++;
1633     } else {
1634         /* FIX: CF-Pollable and CF-PollReq should be set to match the
1635          * values in beacons/probe responses */
1636         /* FIX: how about privacy and WEP? */
1637         /* capability */
1638         *pos = cpu_to_le16(WLAN_CAPABILITY_ESS);
1639         pos++;
1640
1641         /* status_code */
1642         *pos = cpu_to_le16(resp);
1643         pos++;
1644
1645         *pos = cpu_to_le16((sta && sta->aid > 0 ? sta->aid : 0) |
1646                      BIT(14) | BIT(15)); /* AID */
1647         pos++;
1648
1649         /* Supported rates (Information element) */
1650         p = (char *) pos;
1651         *p++ = WLAN_EID_SUPP_RATES;
1652         lpos = p;
1653         *p++ = 0; /* len */
1654         if (local->tx_rate_control & WLAN_RATE_1M) {
1655             *p++ = local->basic_rates & WLAN_RATE_1M ? 0x82 : 0x02;
1656             (*lpos)++;
1657         }
1658         if (local->tx_rate_control & WLAN_RATE_2M) {
1659             *p++ = local->basic_rates & WLAN_RATE_2M ? 0x84 : 0x04;
1660             (*lpos)++;
1661         }
1662         if (local->tx_rate_control & WLAN_RATE_5M5) {
1663             *p++ = local->basic_rates & WLAN_RATE_5M5 ?
1664                 0x8b : 0x0b;
1665             (*lpos)++;
1666         }
1667         if (local->tx_rate_control & WLAN_RATE_11M) {
1668             *p++ = local->basic_rates & WLAN_RATE_11M ?
1669                 0x96 : 0x16;
1670             (*lpos)++;
1671         }
1672         pos = (__le16 *) p;
1673     }
1674
1675     prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1676              (send_deauth ? IEEE80211_STYPE_DEAUTH :
1677               (reassoc ? IEEE80211_STYPE_REASSOC_RESP :
1678                IEEE80211_STYPE_ASSOC_RESP)),
1679              body, (u8 *) pos - (u8 *) body,
1680              hdr->addr2,
1681              send_deauth ? 0 : local->ap->tx_callback_assoc);
1682
1683     if (sta) {
1684         if (resp == WLAN_STATUS_SUCCESS) {
1685             sta->last_rx = jiffies;
1686             /* STA will be marked associated from TX callback, if
1687              * AssocResp is ACKed */
1688         }
1689         atomic_dec(&sta->users);
1690     }
1691
1692 #if 0
1693     PDEBUG(DEBUG_AP, "%s: %pM %sassoc (len=%d "
1694            "prev_ap=%pM) => %d(%d) (%s)\n",
1695            dev->name,
1696            hdr->addr2,
1697            reassoc ? "re" : "", len,
1698            prev_ap,
1699            resp, send_deauth, txt);
1700 #endif
1701 }
1702
1703
1704 /* Called only as a scheduled task for pending AP frames. */
1705 static void handle_deauth(local_info_t *local, struct sk_buff *skb,
1706               struct hostap_80211_rx_status *rx_stats)
1707 {
1708     struct net_device *dev = local->dev;
1709     struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1710     char *body = (char *) (skb->data + IEEE80211_MGMT_HDR_LEN);
1711     int len;
1712     u16 reason_code;
1713     __le16 *pos;
1714     struct sta_info *sta = NULL;
1715
1716     len = skb->len - IEEE80211_MGMT_HDR_LEN;
1717
1718     if (len < 2) {
1719         printk("handle_deauth - too short payload (len=%d)\n", len);
1720         return;
1721     }
1722
1723     pos = (__le16 *) body;
1724     reason_code = le16_to_cpu(*pos);
1725
1726     PDEBUG(DEBUG_AP, "%s: deauthentication: %pM len=%d, "
1727            "reason_code=%d\n", dev->name, hdr->addr2,
1728            len, reason_code);
1729
1730     spin_lock_bh(&local->ap->sta_table_lock);
1731     sta = ap_get_sta(local->ap, hdr->addr2);
1732     if (sta != NULL) {
1733         if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1734             hostap_event_expired_sta(local->dev, sta);
1735         sta->flags &= ~(WLAN_STA_AUTH | WLAN_STA_ASSOC);
1736     }
1737     spin_unlock_bh(&local->ap->sta_table_lock);
1738     if (sta == NULL) {
1739         printk("%s: deauthentication from %pM, "
1740            "reason_code=%d, but STA not authenticated\n", dev->name,
1741                hdr->addr2, reason_code);
1742     }
1743 }
1744
1745
1746 /* Called only as a scheduled task for pending AP frames. */
1747 static void handle_disassoc(local_info_t *local, struct sk_buff *skb,
1748                 struct hostap_80211_rx_status *rx_stats)
1749 {
1750     struct net_device *dev = local->dev;
1751     struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1752     char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1753     int len;
1754     u16 reason_code;
1755     __le16 *pos;
1756     struct sta_info *sta = NULL;
1757
1758     len = skb->len - IEEE80211_MGMT_HDR_LEN;
1759
1760     if (len < 2) {
1761         printk("handle_disassoc - too short payload (len=%d)\n", len);
1762         return;
1763     }
1764
1765     pos = (__le16 *) body;
1766     reason_code = le16_to_cpu(*pos);
1767
1768     PDEBUG(DEBUG_AP, "%s: disassociation: %pM len=%d, "
1769            "reason_code=%d\n", dev->name, hdr->addr2,
1770            len, reason_code);
1771
1772     spin_lock_bh(&local->ap->sta_table_lock);
1773     sta = ap_get_sta(local->ap, hdr->addr2);
1774     if (sta != NULL) {
1775         if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap)
1776             hostap_event_expired_sta(local->dev, sta);
1777         sta->flags &= ~WLAN_STA_ASSOC;
1778     }
1779     spin_unlock_bh(&local->ap->sta_table_lock);
1780     if (sta == NULL) {
1781         printk("%s: disassociation from %pM, "
1782                "reason_code=%d, but STA not authenticated\n",
1783                dev->name, hdr->addr2, reason_code);
1784     }
1785 }
1786
1787
1788 /* Called only as a scheduled task for pending AP frames. */
1789 static void ap_handle_data_nullfunc(local_info_t *local,
1790                     struct ieee80211_hdr *hdr)
1791 {
1792     struct net_device *dev = local->dev;
1793
1794     /* some STA f/w's seem to require control::ACK frame for
1795      * data::nullfunc, but at least Prism2 station f/w version 0.8.0 does
1796      * not send this..
1797      * send control::ACK for the data::nullfunc */
1798
1799     printk(KERN_DEBUG "Sending control::ACK for data::nullfunc\n");
1800     prism2_send_mgmt(dev, IEEE80211_FTYPE_CTL | IEEE80211_STYPE_ACK,
1801              NULL, 0, hdr->addr2, 0);
1802 }
1803
1804
1805 /* Called only as a scheduled task for pending AP frames. */
1806 static void ap_handle_dropped_data(local_info_t *local,
1807                    struct ieee80211_hdr *hdr)
1808 {
1809     struct net_device *dev = local->dev;
1810     struct sta_info *sta;
1811     __le16 reason;
1812
1813     spin_lock_bh(&local->ap->sta_table_lock);
1814     sta = ap_get_sta(local->ap, hdr->addr2);
1815     if (sta)
1816         atomic_inc(&sta->users);
1817     spin_unlock_bh(&local->ap->sta_table_lock);
1818
1819     if (sta != NULL && (sta->flags & WLAN_STA_ASSOC)) {
1820         PDEBUG(DEBUG_AP, "ap_handle_dropped_data: STA is now okay?\n");
1821         atomic_dec(&sta->users);
1822         return;
1823     }
1824
1825     reason = cpu_to_le16(WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1826     prism2_send_mgmt(dev, IEEE80211_FTYPE_MGMT |
1827              ((sta == NULL || !(sta->flags & WLAN_STA_ASSOC)) ?
1828               IEEE80211_STYPE_DEAUTH : IEEE80211_STYPE_DISASSOC),
1829              (char *) &reason, sizeof(reason), hdr->addr2, 0);
1830
1831     if (sta)
1832         atomic_dec(&sta->users);
1833 }
1834
1835 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
1836
1837
1838 /* Called only as a scheduled task for pending AP frames. */
1839 static void pspoll_send_buffered(local_info_t *local, struct sta_info *sta,
1840                  struct sk_buff *skb)
1841 {
1842     struct hostap_skb_tx_data *meta;
1843
1844     if (!(sta->flags & WLAN_STA_PS)) {
1845         /* Station has moved to non-PS mode, so send all buffered
1846          * frames using normal device queue. */
1847         dev_queue_xmit(skb);
1848         return;
1849     }
1850
1851     /* add a flag for hostap_handle_sta_tx() to know that this skb should
1852      * be passed through even though STA is using PS */
1853     meta = (struct hostap_skb_tx_data *) skb->cb;
1854     meta->flags |= HOSTAP_TX_FLAGS_BUFFERED_FRAME;
1855     if (!skb_queue_empty(&sta->tx_buf)) {
1856         /* indicate to STA that more frames follow */
1857         meta->flags |= HOSTAP_TX_FLAGS_ADD_MOREDATA;
1858     }
1859     dev_queue_xmit(skb);
1860 }
1861
1862
1863 /* Called only as a scheduled task for pending AP frames. */
1864 static void handle_pspoll(local_info_t *local,
1865               struct ieee80211_hdr *hdr,
1866               struct hostap_80211_rx_status *rx_stats)
1867 {
1868     struct net_device *dev = local->dev;
1869     struct sta_info *sta;
1870     u16 aid;
1871     struct sk_buff *skb;
1872
1873     PDEBUG(DEBUG_PS2, "handle_pspoll: BSSID=%pM, TA=%pM PWRMGT=%d\n",
1874            hdr->addr1, hdr->addr2, !!ieee80211_has_pm(hdr->frame_control));
1875
1876     if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
1877         PDEBUG(DEBUG_AP,
1878                "handle_pspoll - addr1(BSSID)=%pM not own MAC\n",
1879                hdr->addr1);
1880         return;
1881     }
1882
1883     aid = le16_to_cpu(hdr->duration_id);
1884     if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14))) {
1885         PDEBUG(DEBUG_PS, "   PSPOLL and AID[15:14] not set\n");
1886         return;
1887     }
1888     aid &= ~(BIT(15) | BIT(14));
1889     if (aid == 0 || aid > MAX_AID_TABLE_SIZE) {
1890         PDEBUG(DEBUG_PS, "   invalid aid=%d\n", aid);
1891         return;
1892     }
1893     PDEBUG(DEBUG_PS2, "   aid=%d\n", aid);
1894
1895     spin_lock_bh(&local->ap->sta_table_lock);
1896     sta = ap_get_sta(local->ap, hdr->addr2);
1897     if (sta)
1898         atomic_inc(&sta->users);
1899     spin_unlock_bh(&local->ap->sta_table_lock);
1900
1901     if (sta == NULL) {
1902         PDEBUG(DEBUG_PS, "   STA not found\n");
1903         return;
1904     }
1905     if (sta->aid != aid) {
1906         PDEBUG(DEBUG_PS, "   received aid=%i does not match with "
1907                "assoc.aid=%d\n", aid, sta->aid);
1908         return;
1909     }
1910
1911     /* FIX: todo:
1912      * - add timeout for buffering (clear aid in TIM vector if buffer timed
1913      *   out (expiry time must be longer than ListenInterval for
1914      *   the corresponding STA; "8802-11: 11.2.1.9 AP aging function"
1915      * - what to do, if buffered, pspolled, and sent frame is not ACKed by
1916      *   sta; store buffer for later use and leave TIM aid bit set? use
1917      *   TX event to check whether frame was ACKed?
1918      */
1919
1920     while ((skb = skb_dequeue(&sta->tx_buf)) != NULL) {
1921         /* send buffered frame .. */
1922         PDEBUG(DEBUG_PS2, "Sending buffered frame to STA after PS POLL"
1923                " (buffer_count=%d)\n", skb_queue_len(&sta->tx_buf));
1924
1925         pspoll_send_buffered(local, sta, skb);
1926
1927         if (sta->flags & WLAN_STA_PS) {
1928             /* send only one buffered packet per PS Poll */
1929             /* FIX: should ignore further PS Polls until the
1930              * buffered packet that was just sent is acknowledged
1931              * (Tx or TxExc event) */
1932             break;
1933         }
1934     }
1935
1936     if (skb_queue_empty(&sta->tx_buf)) {
1937         /* try to clear aid from TIM */
1938         if (!(sta->flags & WLAN_STA_TIM))
1939             PDEBUG(DEBUG_PS2,  "Re-unsetting TIM for aid %d\n",
1940                    aid);
1941         hostap_set_tim(local, aid, 0);
1942         sta->flags &= ~WLAN_STA_TIM;
1943     }
1944
1945     atomic_dec(&sta->users);
1946 }
1947
1948
1949 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
1950
1951 static void handle_wds_oper_queue(struct work_struct *work)
1952 {
1953     struct ap_data *ap = container_of(work, struct ap_data,
1954                       wds_oper_queue);
1955     local_info_t *local = ap->local;
1956     struct wds_oper_data *entry, *prev;
1957
1958     spin_lock_bh(&local->lock);
1959     entry = local->ap->wds_oper_entries;
1960     local->ap->wds_oper_entries = NULL;
1961     spin_unlock_bh(&local->lock);
1962
1963     while (entry) {
1964         PDEBUG(DEBUG_AP, "%s: %s automatic WDS connection "
1965                "to AP %pM\n",
1966                local->dev->name,
1967                entry->type == WDS_ADD ? "adding" : "removing",
1968                entry->addr);
1969         if (entry->type == WDS_ADD)
1970             prism2_wds_add(local, entry->addr, 0);
1971         else if (entry->type == WDS_DEL)
1972             prism2_wds_del(local, entry->addr, 0, 1);
1973
1974         prev = entry;
1975         entry = entry->next;
1976         kfree(prev);
1977     }
1978 }
1979
1980
1981 /* Called only as a scheduled task for pending AP frames. */
1982 static void handle_beacon(local_info_t *local, struct sk_buff *skb,
1983               struct hostap_80211_rx_status *rx_stats)
1984 {
1985     struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1986     char *body = skb->data + IEEE80211_MGMT_HDR_LEN;
1987     int len, left;
1988     u16 beacon_int, capability;
1989     __le16 *pos;
1990     char *ssid = NULL;
1991     unsigned char *supp_rates = NULL;
1992     int ssid_len = 0, supp_rates_len = 0;
1993     struct sta_info *sta = NULL;
1994     int new_sta = 0, channel = -1;
1995
1996     len = skb->len - IEEE80211_MGMT_HDR_LEN;
1997
1998     if (len < 8 + 2 + 2) {
1999         printk(KERN_DEBUG "handle_beacon - too short payload "
2000                "(len=%d)\n", len);
2001         return;
2002     }
2003
2004     pos = (__le16 *) body;
2005     left = len;
2006
2007     /* Timestamp (8 octets) */
2008     pos += 4; left -= 8;
2009     /* Beacon interval (2 octets) */
2010     beacon_int = le16_to_cpu(*pos);
2011     pos++; left -= 2;
2012     /* Capability information (2 octets) */
2013     capability = le16_to_cpu(*pos);
2014     pos++; left -= 2;
2015
2016     if (local->ap->ap_policy != AP_OTHER_AP_EVEN_IBSS &&
2017         capability & WLAN_CAPABILITY_IBSS)
2018         return;
2019
2020     if (left >= 2) {
2021         unsigned int ileft;
2022         unsigned char *u = (unsigned char *) pos;
2023
2024         if (*u == WLAN_EID_SSID) {
2025             u++; left--;
2026             ileft = *u;
2027             u++; left--;
2028
2029             if (ileft > left || ileft > MAX_SSID_LEN) {
2030                 PDEBUG(DEBUG_AP, "SSID: overflow\n");
2031                 return;
2032             }
2033
2034             if (local->ap->ap_policy == AP_OTHER_AP_SAME_SSID &&
2035                 (ileft != strlen(local->essid) ||
2036                  memcmp(local->essid, u, ileft) != 0)) {
2037                 /* not our SSID */
2038                 return;
2039             }
2040
2041             ssid = u;
2042             ssid_len = ileft;
2043
2044             u += ileft;
2045             left -= ileft;
2046         }
2047
2048         if (*u == WLAN_EID_SUPP_RATES) {
2049             u++; left--;
2050             ileft = *u;
2051             u++; left--;
2052
2053             if (ileft > left || ileft == 0 || ileft > 8) {
2054                 PDEBUG(DEBUG_AP, " - SUPP_RATES len error\n");
2055                 return;
2056             }
2057
2058             supp_rates = u;
2059             supp_rates_len = ileft;
2060
2061             u += ileft;
2062             left -= ileft;
2063         }
2064
2065         if (*u == WLAN_EID_DS_PARAMS) {
2066             u++; left--;
2067             ileft = *u;
2068             u++; left--;
2069
2070             if (ileft > left || ileft != 1) {
2071                 PDEBUG(DEBUG_AP, " - DS_PARAMS len error\n");
2072                 return;
2073             }
2074
2075             channel = *u;
2076
2077             u += ileft;
2078             left -= ileft;
2079         }
2080     }
2081
2082     spin_lock_bh(&local->ap->sta_table_lock);
2083     sta = ap_get_sta(local->ap, hdr->addr2);
2084     if (sta != NULL)
2085         atomic_inc(&sta->users);
2086     spin_unlock_bh(&local->ap->sta_table_lock);
2087
2088     if (sta == NULL) {
2089         /* add new AP */
2090         new_sta = 1;
2091         sta = ap_add_sta(local->ap, hdr->addr2);
2092         if (sta == NULL) {
2093             printk(KERN_INFO "prism2: kmalloc failed for AP "
2094                    "data structure\n");
2095             return;
2096         }
2097         hostap_event_new_sta(local->dev, sta);
2098
2099         /* mark APs authentication and associated for pseudo ad-hoc
2100          * style communication */
2101         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
2102
2103         if (local->ap->autom_ap_wds) {
2104             hostap_wds_link_oper(local, sta->addr, WDS_ADD);
2105         }
2106     }
2107
2108     sta->ap = 1;
2109     if (ssid) {
2110         sta->u.ap.ssid_len = ssid_len;
2111         memcpy(sta->u.ap.ssid, ssid, ssid_len);
2112         sta->u.ap.ssid[ssid_len] = '\0';
2113     } else {
2114         sta->u.ap.ssid_len = 0;
2115         sta->u.ap.ssid[0] = '\0';
2116     }
2117     sta->u.ap.channel = channel;
2118     sta->rx_packets++;
2119     sta->rx_bytes += len;
2120     sta->u.ap.last_beacon = sta->last_rx = jiffies;
2121     sta->capability = capability;
2122     sta->listen_interval = beacon_int;
2123
2124     atomic_dec(&sta->users);
2125
2126     if (new_sta) {
2127         memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
2128         memcpy(sta->supported_rates, supp_rates, supp_rates_len);
2129         prism2_check_tx_rates(sta);
2130     }
2131 }
2132
2133 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2134
2135
2136 /* Called only as a tasklet. */
2137 static void handle_ap_item(local_info_t *local, struct sk_buff *skb,
2138                struct hostap_80211_rx_status *rx_stats)
2139 {
2140 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2141     struct net_device *dev = local->dev;
2142 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2143     u16 fc, type, stype;
2144     struct ieee80211_hdr *hdr;
2145
2146     /* FIX: should give skb->len to handler functions and check that the
2147      * buffer is long enough */
2148     hdr = (struct ieee80211_hdr *) skb->data;
2149     fc = le16_to_cpu(hdr->frame_control);
2150     type = fc & IEEE80211_FCTL_FTYPE;
2151     stype = fc & IEEE80211_FCTL_STYPE;
2152
2153 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2154     if (!local->hostapd && type == IEEE80211_FTYPE_DATA) {
2155         PDEBUG(DEBUG_AP, "handle_ap_item - data frame\n");
2156
2157         if (!(fc & IEEE80211_FCTL_TODS) ||
2158             (fc & IEEE80211_FCTL_FROMDS)) {
2159             if (stype == IEEE80211_STYPE_NULLFUNC) {
2160                 /* no ToDS nullfunc seems to be used to check
2161                  * AP association; so send reject message to
2162                  * speed up re-association */
2163                 ap_handle_dropped_data(local, hdr);
2164                 goto done;
2165             }
2166             PDEBUG(DEBUG_AP, "   not ToDS frame (fc=0x%04x)\n",
2167                    fc);
2168             goto done;
2169         }
2170
2171         if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
2172             PDEBUG(DEBUG_AP, "handle_ap_item - addr1(BSSID)=%pM"
2173                    " not own MAC\n", hdr->addr1);
2174             goto done;
2175         }
2176
2177         if (local->ap->nullfunc_ack &&
2178             stype == IEEE80211_STYPE_NULLFUNC)
2179             ap_handle_data_nullfunc(local, hdr);
2180         else
2181             ap_handle_dropped_data(local, hdr);
2182         goto done;
2183     }
2184
2185     if (type == IEEE80211_FTYPE_MGMT && stype == IEEE80211_STYPE_BEACON) {
2186         handle_beacon(local, skb, rx_stats);
2187         goto done;
2188     }
2189 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2190
2191     if (type == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL) {
2192         handle_pspoll(local, hdr, rx_stats);
2193         goto done;
2194     }
2195
2196     if (local->hostapd) {
2197         PDEBUG(DEBUG_AP, "Unknown frame in AP queue: type=0x%02x "
2198                "subtype=0x%02x\n", type, stype);
2199         goto done;
2200     }
2201
2202 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2203     if (type != IEEE80211_FTYPE_MGMT) {
2204         PDEBUG(DEBUG_AP, "handle_ap_item - not a management frame?\n");
2205         goto done;
2206     }
2207
2208     if (!ether_addr_equal(hdr->addr1, dev->dev_addr)) {
2209         PDEBUG(DEBUG_AP, "handle_ap_item - addr1(DA)=%pM"
2210                " not own MAC\n", hdr->addr1);
2211         goto done;
2212     }
2213
2214     if (!ether_addr_equal(hdr->addr3, dev->dev_addr)) {
2215         PDEBUG(DEBUG_AP, "handle_ap_item - addr3(BSSID)=%pM"
2216                " not own MAC\n", hdr->addr3);
2217         goto done;
2218     }
2219
2220     switch (stype) {
2221     case IEEE80211_STYPE_ASSOC_REQ:
2222         handle_assoc(local, skb, rx_stats, 0);
2223         break;
2224     case IEEE80211_STYPE_ASSOC_RESP:
2225         PDEBUG(DEBUG_AP, "==> ASSOC RESP (ignored)\n");
2226         break;
2227     case IEEE80211_STYPE_REASSOC_REQ:
2228         handle_assoc(local, skb, rx_stats, 1);
2229         break;
2230     case IEEE80211_STYPE_REASSOC_RESP:
2231         PDEBUG(DEBUG_AP, "==> REASSOC RESP (ignored)\n");
2232         break;
2233     case IEEE80211_STYPE_ATIM:
2234         PDEBUG(DEBUG_AP, "==> ATIM (ignored)\n");
2235         break;
2236     case IEEE80211_STYPE_DISASSOC:
2237         handle_disassoc(local, skb, rx_stats);
2238         break;
2239     case IEEE80211_STYPE_AUTH:
2240         handle_authen(local, skb, rx_stats);
2241         break;
2242     case IEEE80211_STYPE_DEAUTH:
2243         handle_deauth(local, skb, rx_stats);
2244         break;
2245     default:
2246         PDEBUG(DEBUG_AP, "Unknown mgmt frame subtype 0x%02x\n",
2247                stype >> 4);
2248         break;
2249     }
2250 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2251
2252  done:
2253     dev_kfree_skb(skb);
2254 }
2255
2256
2257 /* Called only as a tasklet (software IRQ) */
2258 void hostap_rx(struct net_device *dev, struct sk_buff *skb,
2259            struct hostap_80211_rx_status *rx_stats)
2260 {
2261     struct hostap_interface *iface;
2262     local_info_t *local;
2263     struct ieee80211_hdr *hdr;
2264
2265     iface = netdev_priv(dev);
2266     local = iface->local;
2267
2268     if (skb->len < 16)
2269         goto drop;
2270
2271     dev->stats.rx_packets++;
2272
2273     hdr = (struct ieee80211_hdr *) skb->data;
2274
2275     if (local->ap->ap_policy == AP_OTHER_AP_SKIP_ALL &&
2276         ieee80211_is_beacon(hdr->frame_control))
2277         goto drop;
2278
2279     skb->protocol = cpu_to_be16(ETH_P_HOSTAP);
2280     handle_ap_item(local, skb, rx_stats);
2281     return;
2282
2283  drop:
2284     dev_kfree_skb(skb);
2285 }
2286
2287
2288 /* Called only as a tasklet (software IRQ) */
2289 static void schedule_packet_send(local_info_t *local, struct sta_info *sta)
2290 {
2291     struct sk_buff *skb;
2292     struct ieee80211_hdr *hdr;
2293     struct hostap_80211_rx_status rx_stats;
2294
2295     if (skb_queue_empty(&sta->tx_buf))
2296         return;
2297
2298     skb = dev_alloc_skb(16);
2299     if (skb == NULL) {
2300         printk(KERN_DEBUG "%s: schedule_packet_send: skb alloc "
2301                "failed\n", local->dev->name);
2302         return;
2303     }
2304
2305     hdr = skb_put(skb, 16);
2306
2307     /* Generate a fake pspoll frame to start packet delivery */
2308     hdr->frame_control = cpu_to_le16(
2309         IEEE80211_FTYPE_CTL | IEEE80211_STYPE_PSPOLL);
2310     memcpy(hdr->addr1, local->dev->dev_addr, ETH_ALEN);
2311     memcpy(hdr->addr2, sta->addr, ETH_ALEN);
2312     hdr->duration_id = cpu_to_le16(sta->aid | BIT(15) | BIT(14));
2313
2314     PDEBUG(DEBUG_PS2,
2315            "%s: Scheduling buffered packet delivery for STA %pM\n",
2316            local->dev->name, sta->addr);
2317
2318     skb->dev = local->dev;
2319
2320     memset(&rx_stats, 0, sizeof(rx_stats));
2321     hostap_rx(local->dev, skb, &rx_stats);
2322 }
2323
2324
2325 int prism2_ap_get_sta_qual(local_info_t *local, struct sockaddr addr[],
2326                struct iw_quality qual[], int buf_size,
2327                int aplist)
2328 {
2329     struct ap_data *ap = local->ap;
2330     struct list_head *ptr;
2331     int count = 0;
2332
2333     spin_lock_bh(&ap->sta_table_lock);
2334
2335     for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2336          ptr = ptr->next) {
2337         struct sta_info *sta = (struct sta_info *) ptr;
2338
2339         if (aplist && !sta->ap)
2340             continue;
2341         addr[count].sa_family = ARPHRD_ETHER;
2342         memcpy(addr[count].sa_data, sta->addr, ETH_ALEN);
2343         if (sta->last_rx_silence == 0)
2344             qual[count].qual = sta->last_rx_signal < 27 ?
2345                 0 : (sta->last_rx_signal - 27) * 92 / 127;
2346         else
2347             qual[count].qual = sta->last_rx_signal -
2348                 sta->last_rx_silence - 35;
2349         qual[count].level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2350         qual[count].noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2351         qual[count].updated = sta->last_rx_updated;
2352
2353         sta->last_rx_updated = IW_QUAL_DBM;
2354
2355         count++;
2356         if (count >= buf_size)
2357             break;
2358     }
2359     spin_unlock_bh(&ap->sta_table_lock);
2360
2361     return count;
2362 }
2363
2364
2365 /* Translate our list of Access Points & Stations to a card independent
2366  * format that the Wireless Tools will understand - Jean II */
2367 int prism2_ap_translate_scan(struct net_device *dev,
2368                  struct iw_request_info *info, char *buffer)
2369 {
2370     struct hostap_interface *iface;
2371     local_info_t *local;
2372     struct ap_data *ap;
2373     struct list_head *ptr;
2374     struct iw_event iwe;
2375     char *current_ev = buffer;
2376     char *end_buf = buffer + IW_SCAN_MAX_DATA;
2377 #if !defined(PRISM2_NO_KERNEL_IEEE80211_MGMT)
2378     char buf[64];
2379 #endif
2380
2381     iface = netdev_priv(dev);
2382     local = iface->local;
2383     ap = local->ap;
2384
2385     spin_lock_bh(&ap->sta_table_lock);
2386
2387     for (ptr = ap->sta_list.next; ptr != NULL && ptr != &ap->sta_list;
2388          ptr = ptr->next) {
2389         struct sta_info *sta = (struct sta_info *) ptr;
2390
2391         /* First entry *MUST* be the AP MAC address */
2392         memset(&iwe, 0, sizeof(iwe));
2393         iwe.cmd = SIOCGIWAP;
2394         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2395         memcpy(iwe.u.ap_addr.sa_data, sta->addr, ETH_ALEN);
2396         iwe.len = IW_EV_ADDR_LEN;
2397         current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2398                           &iwe, IW_EV_ADDR_LEN);
2399
2400         /* Use the mode to indicate if it's a station or
2401          * an Access Point */
2402         memset(&iwe, 0, sizeof(iwe));
2403         iwe.cmd = SIOCGIWMODE;
2404         if (sta->ap)
2405             iwe.u.mode = IW_MODE_MASTER;
2406         else
2407             iwe.u.mode = IW_MODE_INFRA;
2408         iwe.len = IW_EV_UINT_LEN;
2409         current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2410                           &iwe, IW_EV_UINT_LEN);
2411
2412         /* Some quality */
2413         memset(&iwe, 0, sizeof(iwe));
2414         iwe.cmd = IWEVQUAL;
2415         if (sta->last_rx_silence == 0)
2416             iwe.u.qual.qual = sta->last_rx_signal < 27 ?
2417                 0 : (sta->last_rx_signal - 27) * 92 / 127;
2418         else
2419             iwe.u.qual.qual = sta->last_rx_signal -
2420                 sta->last_rx_silence - 35;
2421         iwe.u.qual.level = HFA384X_LEVEL_TO_dBm(sta->last_rx_signal);
2422         iwe.u.qual.noise = HFA384X_LEVEL_TO_dBm(sta->last_rx_silence);
2423         iwe.u.qual.updated = sta->last_rx_updated;
2424         iwe.len = IW_EV_QUAL_LEN;
2425         current_ev = iwe_stream_add_event(info, current_ev, end_buf,
2426                           &iwe, IW_EV_QUAL_LEN);
2427
2428 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2429         if (sta->ap) {
2430             memset(&iwe, 0, sizeof(iwe));
2431             iwe.cmd = SIOCGIWESSID;
2432             iwe.u.data.length = sta->u.ap.ssid_len;
2433             iwe.u.data.flags = 1;
2434             current_ev = iwe_stream_add_point(info, current_ev,
2435                               end_buf, &iwe,
2436                               sta->u.ap.ssid);
2437
2438             memset(&iwe, 0, sizeof(iwe));
2439             iwe.cmd = SIOCGIWENCODE;
2440             if (sta->capability & WLAN_CAPABILITY_PRIVACY)
2441                 iwe.u.data.flags =
2442                     IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2443             else
2444                 iwe.u.data.flags = IW_ENCODE_DISABLED;
2445             current_ev = iwe_stream_add_point(info, current_ev,
2446                               end_buf, &iwe,
2447                               sta->u.ap.ssid);
2448
2449             if (sta->u.ap.channel > 0 &&
2450                 sta->u.ap.channel <= FREQ_COUNT) {
2451                 memset(&iwe, 0, sizeof(iwe));
2452                 iwe.cmd = SIOCGIWFREQ;
2453                 iwe.u.freq.m = freq_list[sta->u.ap.channel - 1]
2454                     * 100000;
2455                 iwe.u.freq.e = 1;
2456                 current_ev = iwe_stream_add_event(
2457                     info, current_ev, end_buf, &iwe,
2458                     IW_EV_FREQ_LEN);
2459             }
2460
2461             memset(&iwe, 0, sizeof(iwe));
2462             iwe.cmd = IWEVCUSTOM;
2463             sprintf(buf, "beacon_interval=%d",
2464                 sta->listen_interval);
2465             iwe.u.data.length = strlen(buf);
2466             current_ev = iwe_stream_add_point(info, current_ev,
2467                               end_buf, &iwe, buf);
2468         }
2469 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2470
2471         sta->last_rx_updated = IW_QUAL_DBM;
2472
2473         /* To be continued, we should make good use of IWEVCUSTOM */
2474     }
2475
2476     spin_unlock_bh(&ap->sta_table_lock);
2477
2478     return current_ev - buffer;
2479 }
2480
2481
2482 static int prism2_hostapd_add_sta(struct ap_data *ap,
2483                   struct prism2_hostapd_param *param)
2484 {
2485     struct sta_info *sta;
2486
2487     spin_lock_bh(&ap->sta_table_lock);
2488     sta = ap_get_sta(ap, param->sta_addr);
2489     if (sta)
2490         atomic_inc(&sta->users);
2491     spin_unlock_bh(&ap->sta_table_lock);
2492
2493     if (sta == NULL) {
2494         sta = ap_add_sta(ap, param->sta_addr);
2495         if (sta == NULL)
2496             return -1;
2497     }
2498
2499     if (!(sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2500         hostap_event_new_sta(sta->local->dev, sta);
2501
2502     sta->flags |= WLAN_STA_AUTH | WLAN_STA_ASSOC;
2503     sta->last_rx = jiffies;
2504     sta->aid = param->u.add_sta.aid;
2505     sta->capability = param->u.add_sta.capability;
2506     sta->tx_supp_rates = param->u.add_sta.tx_supp_rates;
2507     if (sta->tx_supp_rates & WLAN_RATE_1M)
2508         sta->supported_rates[0] = 2;
2509     if (sta->tx_supp_rates & WLAN_RATE_2M)
2510         sta->supported_rates[1] = 4;
2511     if (sta->tx_supp_rates & WLAN_RATE_5M5)
2512         sta->supported_rates[2] = 11;
2513     if (sta->tx_supp_rates & WLAN_RATE_11M)
2514         sta->supported_rates[3] = 22;
2515     prism2_check_tx_rates(sta);
2516     atomic_dec(&sta->users);
2517     return 0;
2518 }
2519
2520
2521 static int prism2_hostapd_remove_sta(struct ap_data *ap,
2522                      struct prism2_hostapd_param *param)
2523 {
2524     struct sta_info *sta;
2525
2526     spin_lock_bh(&ap->sta_table_lock);
2527     sta = ap_get_sta(ap, param->sta_addr);
2528     if (sta) {
2529         ap_sta_hash_del(ap, sta);
2530         list_del(&sta->list);
2531     }
2532     spin_unlock_bh(&ap->sta_table_lock);
2533
2534     if (!sta)
2535         return -ENOENT;
2536
2537     if ((sta->flags & WLAN_STA_ASSOC) && !sta->ap && sta->local)
2538         hostap_event_expired_sta(sta->local->dev, sta);
2539     ap_free_sta(ap, sta);
2540
2541     return 0;
2542 }
2543
2544
2545 static int prism2_hostapd_get_info_sta(struct ap_data *ap,
2546                        struct prism2_hostapd_param *param)
2547 {
2548     struct sta_info *sta;
2549
2550     spin_lock_bh(&ap->sta_table_lock);
2551     sta = ap_get_sta(ap, param->sta_addr);
2552     if (sta)
2553         atomic_inc(&sta->users);
2554     spin_unlock_bh(&ap->sta_table_lock);
2555
2556     if (!sta)
2557         return -ENOENT;
2558
2559     param->u.get_info_sta.inactive_sec = (jiffies - sta->last_rx) / HZ;
2560
2561     atomic_dec(&sta->users);
2562
2563     return 1;
2564 }
2565
2566
2567 static int prism2_hostapd_set_flags_sta(struct ap_data *ap,
2568                     struct prism2_hostapd_param *param)
2569 {
2570     struct sta_info *sta;
2571
2572     spin_lock_bh(&ap->sta_table_lock);
2573     sta = ap_get_sta(ap, param->sta_addr);
2574     if (sta) {
2575         sta->flags |= param->u.set_flags_sta.flags_or;
2576         sta->flags &= param->u.set_flags_sta.flags_and;
2577     }
2578     spin_unlock_bh(&ap->sta_table_lock);
2579
2580     if (!sta)
2581         return -ENOENT;
2582
2583     return 0;
2584 }
2585
2586
2587 static int prism2_hostapd_sta_clear_stats(struct ap_data *ap,
2588                       struct prism2_hostapd_param *param)
2589 {
2590     struct sta_info *sta;
2591     int rate;
2592
2593     spin_lock_bh(&ap->sta_table_lock);
2594     sta = ap_get_sta(ap, param->sta_addr);
2595     if (sta) {
2596         sta->rx_packets = sta->tx_packets = 0;
2597         sta->rx_bytes = sta->tx_bytes = 0;
2598         for (rate = 0; rate < WLAN_RATE_COUNT; rate++) {
2599             sta->tx_count[rate] = 0;
2600             sta->rx_count[rate] = 0;
2601         }
2602     }
2603     spin_unlock_bh(&ap->sta_table_lock);
2604
2605     if (!sta)
2606         return -ENOENT;
2607
2608     return 0;
2609 }
2610
2611
2612 int prism2_hostapd(struct ap_data *ap, struct prism2_hostapd_param *param)
2613 {
2614     switch (param->cmd) {
2615     case PRISM2_HOSTAPD_FLUSH:
2616         ap_control_kickall(ap);
2617         return 0;
2618     case PRISM2_HOSTAPD_ADD_STA:
2619         return prism2_hostapd_add_sta(ap, param);
2620     case PRISM2_HOSTAPD_REMOVE_STA:
2621         return prism2_hostapd_remove_sta(ap, param);
2622     case PRISM2_HOSTAPD_GET_INFO_STA:
2623         return prism2_hostapd_get_info_sta(ap, param);
2624     case PRISM2_HOSTAPD_SET_FLAGS_STA:
2625         return prism2_hostapd_set_flags_sta(ap, param);
2626     case PRISM2_HOSTAPD_STA_CLEAR_STATS:
2627         return prism2_hostapd_sta_clear_stats(ap, param);
2628     default:
2629         printk(KERN_WARNING "prism2_hostapd: unknown cmd=%d\n",
2630                param->cmd);
2631         return -EOPNOTSUPP;
2632     }
2633 }
2634
2635
2636 /* Update station info for host-based TX rate control and return current
2637  * TX rate */
2638 static int ap_update_sta_tx_rate(struct sta_info *sta, struct net_device *dev)
2639 {
2640     int ret = sta->tx_rate;
2641     struct hostap_interface *iface;
2642     local_info_t *local;
2643
2644     iface = netdev_priv(dev);
2645     local = iface->local;
2646
2647     sta->tx_count[sta->tx_rate_idx]++;
2648     sta->tx_since_last_failure++;
2649     sta->tx_consecutive_exc = 0;
2650     if (sta->tx_since_last_failure >= WLAN_RATE_UPDATE_COUNT &&
2651         sta->tx_rate_idx < sta->tx_max_rate) {
2652         /* use next higher rate */
2653         int old_rate, new_rate;
2654         old_rate = new_rate = sta->tx_rate_idx;
2655         while (new_rate < sta->tx_max_rate) {
2656             new_rate++;
2657             if (ap_tx_rate_ok(new_rate, sta, local)) {
2658                 sta->tx_rate_idx = new_rate;
2659                 break;
2660             }
2661         }
2662         if (old_rate != sta->tx_rate_idx) {
2663             switch (sta->tx_rate_idx) {
2664             case 0: sta->tx_rate = 10; break;
2665             case 1: sta->tx_rate = 20; break;
2666             case 2: sta->tx_rate = 55; break;
2667             case 3: sta->tx_rate = 110; break;
2668             default: sta->tx_rate = 0; break;
2669             }
2670             PDEBUG(DEBUG_AP, "%s: STA %pM TX rate raised to %d\n",
2671                    dev->name, sta->addr, sta->tx_rate);
2672         }
2673         sta->tx_since_last_failure = 0;
2674     }
2675
2676     return ret;
2677 }
2678
2679
2680 /* Called only from software IRQ. Called for each TX frame prior possible
2681  * encryption and transmit. */
2682 ap_tx_ret hostap_handle_sta_tx(local_info_t *local, struct hostap_tx_data *tx)
2683 {
2684     struct sta_info *sta = NULL;
2685     struct sk_buff *skb = tx->skb;
2686     int set_tim, ret;
2687     struct ieee80211_hdr *hdr;
2688     struct hostap_skb_tx_data *meta;
2689
2690     meta = (struct hostap_skb_tx_data *) skb->cb;
2691     ret = AP_TX_CONTINUE;
2692     if (local->ap == NULL || skb->len < 10 ||
2693         meta->iface->type == HOSTAP_INTERFACE_STA)
2694         goto out;
2695
2696     hdr = (struct ieee80211_hdr *) skb->data;
2697
2698     if (hdr->addr1[0] & 0x01) {
2699         /* broadcast/multicast frame - no AP related processing */
2700         if (local->ap->num_sta <= 0)
2701             ret = AP_TX_DROP;
2702         goto out;
2703     }
2704
2705     /* unicast packet - check whether destination STA is associated */
2706     spin_lock(&local->ap->sta_table_lock);
2707     sta = ap_get_sta(local->ap, hdr->addr1);
2708     if (sta)
2709         atomic_inc(&sta->users);
2710     spin_unlock(&local->ap->sta_table_lock);
2711
2712     if (local->iw_mode == IW_MODE_MASTER && sta == NULL &&
2713         !(meta->flags & HOSTAP_TX_FLAGS_WDS) &&
2714         meta->iface->type != HOSTAP_INTERFACE_MASTER &&
2715         meta->iface->type != HOSTAP_INTERFACE_AP) {
2716 #if 0
2717         /* This can happen, e.g., when wlan0 is added to a bridge and
2718          * bridging code does not know which port is the correct target
2719          * for a unicast frame. In this case, the packet is send to all
2720          * ports of the bridge. Since this is a valid scenario, do not
2721          * print out any errors here. */
2722         if (net_ratelimit()) {
2723             printk(KERN_DEBUG "AP: drop packet to non-associated "
2724                    "STA %pM\n", hdr->addr1);
2725         }
2726 #endif
2727         local->ap->tx_drop_nonassoc++;
2728         ret = AP_TX_DROP;
2729         goto out;
2730     }
2731
2732     if (sta == NULL)
2733         goto out;
2734
2735     if (!(sta->flags & WLAN_STA_AUTHORIZED))
2736         ret = AP_TX_CONTINUE_NOT_AUTHORIZED;
2737
2738     /* Set tx_rate if using host-based TX rate control */
2739     if (!local->fw_tx_rate_control)
2740         local->ap->last_tx_rate = meta->rate =
2741             ap_update_sta_tx_rate(sta, local->dev);
2742
2743     if (local->iw_mode != IW_MODE_MASTER)
2744         goto out;
2745
2746     if (!(sta->flags & WLAN_STA_PS))
2747         goto out;
2748
2749     if (meta->flags & HOSTAP_TX_FLAGS_ADD_MOREDATA) {
2750         /* indicate to STA that more frames follow */
2751         hdr->frame_control |=
2752             cpu_to_le16(IEEE80211_FCTL_MOREDATA);
2753     }
2754
2755     if (meta->flags & HOSTAP_TX_FLAGS_BUFFERED_FRAME) {
2756         /* packet was already buffered and now send due to
2757          * PS poll, so do not rebuffer it */
2758         goto out;
2759     }
2760
2761     if (skb_queue_len(&sta->tx_buf) >= STA_MAX_TX_BUFFER) {
2762         PDEBUG(DEBUG_PS, "%s: No more space in STA (%pM)'s"
2763                "PS mode buffer\n",
2764                local->dev->name, sta->addr);
2765         /* Make sure that TIM is set for the station (it might not be
2766          * after AP wlan hw reset). */
2767         /* FIX: should fix hw reset to restore bits based on STA
2768          * buffer state.. */
2769         hostap_set_tim(local, sta->aid, 1);
2770         sta->flags |= WLAN_STA_TIM;
2771         ret = AP_TX_DROP;
2772         goto out;
2773     }
2774
2775     /* STA in PS mode, buffer frame for later delivery */
2776     set_tim = skb_queue_empty(&sta->tx_buf);
2777     skb_queue_tail(&sta->tx_buf, skb);
2778     /* FIX: could save RX time to skb and expire buffered frames after
2779      * some time if STA does not poll for them */
2780
2781     if (set_tim) {
2782         if (sta->flags & WLAN_STA_TIM)
2783             PDEBUG(DEBUG_PS2, "Re-setting TIM for aid %d\n",
2784                    sta->aid);
2785         hostap_set_tim(local, sta->aid, 1);
2786         sta->flags |= WLAN_STA_TIM;
2787     }
2788
2789     ret = AP_TX_BUFFERED;
2790
2791  out:
2792     if (sta != NULL) {
2793         if (ret == AP_TX_CONTINUE ||
2794             ret == AP_TX_CONTINUE_NOT_AUTHORIZED) {
2795             sta->tx_packets++;
2796             sta->tx_bytes += skb->len;
2797             sta->last_tx = jiffies;
2798         }
2799
2800         if ((ret == AP_TX_CONTINUE ||
2801              ret == AP_TX_CONTINUE_NOT_AUTHORIZED) &&
2802             sta->crypt && tx->host_encrypt) {
2803             tx->crypt = sta->crypt;
2804             tx->sta_ptr = sta; /* hostap_handle_sta_release() will
2805                         * be called to release sta info
2806                         * later */
2807         } else
2808             atomic_dec(&sta->users);
2809     }
2810
2811     return ret;
2812 }
2813
2814
2815 void hostap_handle_sta_release(void *ptr)
2816 {
2817     struct sta_info *sta = ptr;
2818     atomic_dec(&sta->users);
2819 }
2820
2821
2822 /* Called only as a tasklet (software IRQ) */
2823 void hostap_handle_sta_tx_exc(local_info_t *local, struct sk_buff *skb)
2824 {
2825     struct sta_info *sta;
2826     struct ieee80211_hdr *hdr;
2827     struct hostap_skb_tx_data *meta;
2828
2829     hdr = (struct ieee80211_hdr *) skb->data;
2830     meta = (struct hostap_skb_tx_data *) skb->cb;
2831
2832     spin_lock(&local->ap->sta_table_lock);
2833     sta = ap_get_sta(local->ap, hdr->addr1);
2834     if (!sta) {
2835         spin_unlock(&local->ap->sta_table_lock);
2836         PDEBUG(DEBUG_AP, "%s: Could not find STA %pM"
2837                " for this TX error (@%lu)\n",
2838                local->dev->name, hdr->addr1, jiffies);
2839         return;
2840     }
2841
2842     sta->tx_since_last_failure = 0;
2843     sta->tx_consecutive_exc++;
2844
2845     if (sta->tx_consecutive_exc >= WLAN_RATE_DECREASE_THRESHOLD &&
2846         sta->tx_rate_idx > 0 && meta->rate <= sta->tx_rate) {
2847         /* use next lower rate */
2848         int old, rate;
2849         old = rate = sta->tx_rate_idx;
2850         while (rate > 0) {
2851             rate--;
2852             if (ap_tx_rate_ok(rate, sta, local)) {
2853                 sta->tx_rate_idx = rate;
2854                 break;
2855             }
2856         }
2857         if (old != sta->tx_rate_idx) {
2858             switch (sta->tx_rate_idx) {
2859             case 0: sta->tx_rate = 10; break;
2860             case 1: sta->tx_rate = 20; break;
2861             case 2: sta->tx_rate = 55; break;
2862             case 3: sta->tx_rate = 110; break;
2863             default: sta->tx_rate = 0; break;
2864             }
2865             PDEBUG(DEBUG_AP,
2866                    "%s: STA %pM TX rate lowered to %d\n",
2867                    local->dev->name, sta->addr, sta->tx_rate);
2868         }
2869         sta->tx_consecutive_exc = 0;
2870     }
2871     spin_unlock(&local->ap->sta_table_lock);
2872 }
2873
2874
2875 static void hostap_update_sta_ps2(local_info_t *local, struct sta_info *sta,
2876                   int pwrmgt, int type, int stype)
2877 {
2878     if (pwrmgt && !(sta->flags & WLAN_STA_PS)) {
2879         sta->flags |= WLAN_STA_PS;
2880         PDEBUG(DEBUG_PS2, "STA %pM changed to use PS "
2881                "mode (type=0x%02X, stype=0x%02X)\n",
2882                sta->addr, type >> 2, stype >> 4);
2883     } else if (!pwrmgt && (sta->flags & WLAN_STA_PS)) {
2884         sta->flags &= ~WLAN_STA_PS;
2885         PDEBUG(DEBUG_PS2, "STA %pM changed to not use "
2886                "PS mode (type=0x%02X, stype=0x%02X)\n",
2887                sta->addr, type >> 2, stype >> 4);
2888         if (type != IEEE80211_FTYPE_CTL ||
2889             stype != IEEE80211_STYPE_PSPOLL)
2890             schedule_packet_send(local, sta);
2891     }
2892 }
2893
2894
2895 /* Called only as a tasklet (software IRQ). Called for each RX frame to update
2896  * STA power saving state. pwrmgt is a flag from 802.11 frame_control field. */
2897 int hostap_update_sta_ps(local_info_t *local, struct ieee80211_hdr *hdr)
2898 {
2899     struct sta_info *sta;
2900     u16 fc;
2901
2902     spin_lock(&local->ap->sta_table_lock);
2903     sta = ap_get_sta(local->ap, hdr->addr2);
2904     if (sta)
2905         atomic_inc(&sta->users);
2906     spin_unlock(&local->ap->sta_table_lock);
2907
2908     if (!sta)
2909         return -1;
2910
2911     fc = le16_to_cpu(hdr->frame_control);
2912     hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
2913                   fc & IEEE80211_FCTL_FTYPE,
2914                   fc & IEEE80211_FCTL_STYPE);
2915
2916     atomic_dec(&sta->users);
2917     return 0;
2918 }
2919
2920
2921 /* Called only as a tasklet (software IRQ). Called for each RX frame after
2922  * getting RX header and payload from hardware. */
2923 ap_rx_ret hostap_handle_sta_rx(local_info_t *local, struct net_device *dev,
2924                    struct sk_buff *skb,
2925                    struct hostap_80211_rx_status *rx_stats,
2926                    int wds)
2927 {
2928     int ret;
2929     struct sta_info *sta;
2930     u16 fc, type, stype;
2931     struct ieee80211_hdr *hdr;
2932
2933     if (local->ap == NULL)
2934         return AP_RX_CONTINUE;
2935
2936     hdr = (struct ieee80211_hdr *) skb->data;
2937
2938     fc = le16_to_cpu(hdr->frame_control);
2939     type = fc & IEEE80211_FCTL_FTYPE;
2940     stype = fc & IEEE80211_FCTL_STYPE;
2941
2942     spin_lock(&local->ap->sta_table_lock);
2943     sta = ap_get_sta(local->ap, hdr->addr2);
2944     if (sta)
2945         atomic_inc(&sta->users);
2946     spin_unlock(&local->ap->sta_table_lock);
2947
2948     if (sta && !(sta->flags & WLAN_STA_AUTHORIZED))
2949         ret = AP_RX_CONTINUE_NOT_AUTHORIZED;
2950     else
2951         ret = AP_RX_CONTINUE;
2952
2953
2954     if (fc & IEEE80211_FCTL_TODS) {
2955         if (!wds && (sta == NULL || !(sta->flags & WLAN_STA_ASSOC))) {
2956             if (local->hostapd) {
2957                 prism2_rx_80211(local->apdev, skb, rx_stats,
2958                         PRISM2_RX_NON_ASSOC);
2959 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2960             } else {
2961                 printk(KERN_DEBUG "%s: dropped received packet"
2962                        " from non-associated STA %pM"
2963                        " (type=0x%02x, subtype=0x%02x)\n",
2964                        dev->name, hdr->addr2,
2965                        type >> 2, stype >> 4);
2966                 hostap_rx(dev, skb, rx_stats);
2967 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
2968             }
2969             ret = AP_RX_EXIT;
2970             goto out;
2971         }
2972     } else if (fc & IEEE80211_FCTL_FROMDS) {
2973         if (!wds) {
2974             /* FromDS frame - not for us; probably
2975              * broadcast/multicast in another BSS - drop */
2976             if (ether_addr_equal(hdr->addr1, dev->dev_addr)) {
2977                 printk(KERN_DEBUG "Odd.. FromDS packet "
2978                        "received with own BSSID\n");
2979                 hostap_dump_rx_80211(dev->name, skb, rx_stats);
2980             }
2981             ret = AP_RX_DROP;
2982             goto out;
2983         }
2984     } else if (stype == IEEE80211_STYPE_NULLFUNC && sta == NULL &&
2985            ether_addr_equal(hdr->addr1, dev->dev_addr)) {
2986
2987         if (local->hostapd) {
2988             prism2_rx_80211(local->apdev, skb, rx_stats,
2989                     PRISM2_RX_NON_ASSOC);
2990 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
2991         } else {
2992             /* At least Lucent f/w seems to send data::nullfunc
2993              * frames with no ToDS flag when the current AP returns
2994              * after being unavailable for some time. Speed up
2995              * re-association by informing the station about it not
2996              * being associated. */
2997             printk(KERN_DEBUG "%s: rejected received nullfunc frame"
2998                    " without ToDS from not associated STA %pM\n",
2999                    dev->name, hdr->addr2);
3000             hostap_rx(dev, skb, rx_stats);
3001 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3002         }
3003         ret = AP_RX_EXIT;
3004         goto out;
3005     } else if (stype == IEEE80211_STYPE_NULLFUNC) {
3006         /* At least Lucent cards seem to send periodic nullfunc
3007          * frames with ToDS. Let these through to update SQ
3008          * stats and PS state. Nullfunc frames do not contain
3009          * any data and they will be dropped below. */
3010     } else {
3011         /* If BSSID (Addr3) is foreign, this frame is a normal
3012          * broadcast frame from an IBSS network. Drop it silently.
3013          * If BSSID is own, report the dropping of this frame. */
3014         if (ether_addr_equal(hdr->addr3, dev->dev_addr)) {
3015             printk(KERN_DEBUG "%s: dropped received packet from %pM"
3016                    " with no ToDS flag "
3017                    "(type=0x%02x, subtype=0x%02x)\n", dev->name,
3018                    hdr->addr2, type >> 2, stype >> 4);
3019             hostap_dump_rx_80211(dev->name, skb, rx_stats);
3020         }
3021         ret = AP_RX_DROP;
3022         goto out;
3023     }
3024
3025     if (sta) {
3026         hostap_update_sta_ps2(local, sta, fc & IEEE80211_FCTL_PM,
3027                       type, stype);
3028
3029         sta->rx_packets++;
3030         sta->rx_bytes += skb->len;
3031         sta->last_rx = jiffies;
3032     }
3033
3034     if (local->ap->nullfunc_ack && stype == IEEE80211_STYPE_NULLFUNC &&
3035         fc & IEEE80211_FCTL_TODS) {
3036         if (local->hostapd) {
3037             prism2_rx_80211(local->apdev, skb, rx_stats,
3038                     PRISM2_RX_NULLFUNC_ACK);
3039 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3040         } else {
3041             /* some STA f/w's seem to require control::ACK frame
3042              * for data::nullfunc, but Prism2 f/w 0.8.0 (at least
3043              * from Compaq) does not send this.. Try to generate
3044              * ACK for these frames from the host driver to make
3045              * power saving work with, e.g., Lucent WaveLAN f/w */
3046             hostap_rx(dev, skb, rx_stats);
3047 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */
3048         }
3049         ret = AP_RX_EXIT;
3050         goto out;
3051     }
3052
3053  out:
3054     if (sta)
3055         atomic_dec(&sta->users);
3056
3057     return ret;
3058 }
3059
3060
3061 /* Called only as a tasklet (software IRQ) */
3062 int hostap_handle_sta_crypto(local_info_t *local,
3063                  struct ieee80211_hdr *hdr,
3064                  struct lib80211_crypt_data **crypt,
3065                  void **sta_ptr)
3066 {
3067     struct sta_info *sta;
3068
3069     spin_lock(&local->ap->sta_table_lock);
3070     sta = ap_get_sta(local->ap, hdr->addr2);
3071     if (sta)
3072         atomic_inc(&sta->users);
3073     spin_unlock(&local->ap->sta_table_lock);
3074
3075     if (!sta)
3076         return -1;
3077
3078     if (sta->crypt) {
3079         *crypt = sta->crypt;
3080         *sta_ptr = sta;
3081         /* hostap_handle_sta_release() will be called to release STA
3082          * info */
3083     } else
3084         atomic_dec(&sta->users);
3085
3086     return 0;
3087 }
3088
3089
3090 /* Called only as a tasklet (software IRQ) */
3091 int hostap_is_sta_assoc(struct ap_data *ap, u8 *sta_addr)
3092 {
3093     struct sta_info *sta;
3094     int ret = 0;
3095
3096     spin_lock(&ap->sta_table_lock);
3097     sta = ap_get_sta(ap, sta_addr);
3098     if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap)
3099         ret = 1;
3100     spin_unlock(&ap->sta_table_lock);
3101
3102     return ret;
3103 }
3104
3105
3106 /* Called only as a tasklet (software IRQ) */
3107 int hostap_is_sta_authorized(struct ap_data *ap, u8 *sta_addr)
3108 {
3109     struct sta_info *sta;
3110     int ret = 0;
3111
3112     spin_lock(&ap->sta_table_lock);
3113     sta = ap_get_sta(ap, sta_addr);
3114     if (sta != NULL && (sta->flags & WLAN_STA_ASSOC) && !sta->ap &&
3115         ((sta->flags & WLAN_STA_AUTHORIZED) ||
3116          ap->local->ieee_802_1x == 0))
3117         ret = 1;
3118     spin_unlock(&ap->sta_table_lock);
3119
3120     return ret;
3121 }
3122
3123
3124 /* Called only as a tasklet (software IRQ) */
3125 int hostap_add_sta(struct ap_data *ap, u8 *sta_addr)
3126 {
3127     struct sta_info *sta;
3128     int ret = 1;
3129
3130     if (!ap)
3131         return -1;
3132
3133     spin_lock(&ap->sta_table_lock);
3134     sta = ap_get_sta(ap, sta_addr);
3135     if (sta)
3136         ret = 0;
3137     spin_unlock(&ap->sta_table_lock);
3138
3139     if (ret == 1) {
3140         sta = ap_add_sta(ap, sta_addr);
3141         if (!sta)
3142             return -1;
3143         sta->flags = WLAN_STA_AUTH | WLAN_STA_ASSOC;
3144         sta->ap = 1;
3145         memset(sta->supported_rates, 0, sizeof(sta->supported_rates));
3146         /* No way of knowing which rates are supported since we did not
3147          * get supported rates element from beacon/assoc req. Assume
3148          * that remote end supports all 802.11b rates. */
3149         sta->supported_rates[0] = 0x82;
3150         sta->supported_rates[1] = 0x84;
3151         sta->supported_rates[2] = 0x0b;
3152         sta->supported_rates[3] = 0x16;
3153         sta->tx_supp_rates = WLAN_RATE_1M | WLAN_RATE_2M |
3154             WLAN_RATE_5M5 | WLAN_RATE_11M;
3155         sta->tx_rate = 110;
3156         sta->tx_max_rate = sta->tx_rate_idx = 3;
3157     }
3158
3159     return ret;
3160 }
3161
3162
3163 /* Called only as a tasklet (software IRQ) */
3164 int hostap_update_rx_stats(struct ap_data *ap,
3165                struct ieee80211_hdr *hdr,
3166                struct hostap_80211_rx_status *rx_stats)
3167 {
3168     struct sta_info *sta;
3169
3170     if (!ap)
3171         return -1;
3172
3173     spin_lock(&ap->sta_table_lock);
3174     sta = ap_get_sta(ap, hdr->addr2);
3175     if (sta) {
3176         sta->last_rx_silence = rx_stats->noise;
3177         sta->last_rx_signal = rx_stats->signal;
3178         sta->last_rx_rate = rx_stats->rate;
3179         sta->last_rx_updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
3180         if (rx_stats->rate == 10)
3181             sta->rx_count[0]++;
3182         else if (rx_stats->rate == 20)
3183             sta->rx_count[1]++;
3184         else if (rx_stats->rate == 55)
3185             sta->rx_count[2]++;
3186         else if (rx_stats->rate == 110)
3187             sta->rx_count[3]++;
3188     }
3189     spin_unlock(&ap->sta_table_lock);
3190
3191     return sta ? 0 : -1;
3192 }
3193
3194
3195 void hostap_update_rates(local_info_t *local)
3196 {
3197     struct sta_info *sta;
3198     struct ap_data *ap = local->ap;
3199
3200     if (!ap)
3201         return;
3202
3203     spin_lock_bh(&ap->sta_table_lock);
3204     list_for_each_entry(sta, &ap->sta_list, list) {
3205         prism2_check_tx_rates(sta);
3206     }
3207     spin_unlock_bh(&ap->sta_table_lock);
3208 }
3209
3210
3211 void * ap_crypt_get_ptrs(struct ap_data *ap, u8 *addr, int permanent,
3212              struct lib80211_crypt_data ***crypt)
3213 {
3214     struct sta_info *sta;
3215
3216     spin_lock_bh(&ap->sta_table_lock);
3217     sta = ap_get_sta(ap, addr);
3218     if (sta)
3219         atomic_inc(&sta->users);
3220     spin_unlock_bh(&ap->sta_table_lock);
3221
3222     if (!sta && permanent)
3223         sta = ap_add_sta(ap, addr);
3224
3225     if (!sta)
3226         return NULL;
3227
3228     if (permanent)
3229         sta->flags |= WLAN_STA_PERM;
3230
3231     *crypt = &sta->crypt;
3232
3233     return sta;
3234 }
3235
3236
3237 void hostap_add_wds_links(local_info_t *local)
3238 {
3239     struct ap_data *ap = local->ap;
3240     struct sta_info *sta;
3241
3242     spin_lock_bh(&ap->sta_table_lock);
3243     list_for_each_entry(sta, &ap->sta_list, list) {
3244         if (sta->ap)
3245             hostap_wds_link_oper(local, sta->addr, WDS_ADD);
3246     }
3247     spin_unlock_bh(&ap->sta_table_lock);
3248
3249     schedule_work(&local->ap->wds_oper_queue);
3250 }
3251
3252
3253 void hostap_wds_link_oper(local_info_t *local, u8 *addr, wds_oper_type type)
3254 {
3255     struct wds_oper_data *entry;
3256
3257     entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
3258     if (!entry)
3259         return;
3260     memcpy(entry->addr, addr, ETH_ALEN);
3261     entry->type = type;
3262     spin_lock_bh(&local->lock);
3263     entry->next = local->ap->wds_oper_entries;
3264     local->ap->wds_oper_entries = entry;
3265     spin_unlock_bh(&local->lock);
3266
3267     schedule_work(&local->ap->wds_oper_queue);
3268 }
3269
3270
3271 EXPORT_SYMBOL(hostap_init_data);
3272 EXPORT_SYMBOL(hostap_init_ap_proc);
3273 EXPORT_SYMBOL(hostap_free_data);
3274 EXPORT_SYMBOL(hostap_check_sta_fw_version);
3275 EXPORT_SYMBOL(hostap_handle_sta_tx_exc);
3276 #ifndef PRISM2_NO_KERNEL_IEEE80211_MGMT
3277 #endif /* PRISM2_NO_KERNEL_IEEE80211_MGMT */